Namespace Amazon.CDK.AWS.EC2

Amazon EC2 Construct Library

---

The @aws-cdk/aws-ec2 package contains primitives for setting up networking and instances.

// Example automatically generated. See https://github.com/aws/jsii/issues/826
using Amazon.CDK.AWS.EC2;

VPC

Most projects need a Virtual Private Cloud to provide security by means of network partitioning. This is achieved by creating an instance of Vpc:

// Example automatically generated. See https://github.com/aws/jsii/issues/826
Vpc vpc = new Vpc(this, "VPC");

All default constructs require EC2 instances to be launched inside a VPC, so you should generally start by defining a VPC whenever you need to launch instances for your project.

Subnet Types

A VPC consists of one or more subnets that instances can be placed into. CDK distinguishes three different subnet types:

A default VPC configuration will create public and private subnets. However, if natGateways:0 and subnetConfiguration is undefined, default VPC configuration will create public and isolated subnets. See Advanced Subnet Configuration below for information on how to change the default subnet configuration.

Constructs using the VPC will "launch instances" (or more accurately, create Elastic Network Interfaces) into one or more of the subnets. They all accept a property called subnetSelection (sometimes called vpcSubnets) to allow you to select in what subnet to place the ENIs, usually defaulting to private subnets if the property is omitted.

If you would like to save on the cost of NAT gateways, you can use isolated subnets instead of private subnets (as described in Advanced Subnet Configuration). If you need private instances to have internet connectivity, another option is to reduce the number of NAT gateways created by setting the natGateways property to a lower value (the default is one NAT gateway per availability zone). Be aware that this may have availability implications for your application.

Control over availability zones

By default, a VPC will spread over at most 3 Availability Zones available to it. To change the number of Availability Zones that the VPC will spread over, specify the maxAzs property when defining it.

The number of Availability Zones that are available depends on the region and account of the Stack containing the VPC. If the region and account are specified on the Stack, the CLI will look up the existing Availability Zones and get an accurate count. If region and account are not specified, the stack could be deployed anywhere and it will have to make a safe choice, limiting itself to 2 Availability Zones.

Therefore, to get the VPC to spread over 3 or more availability zones, you must specify the environment where the stack will be deployed.

You can gain full control over the availability zones selection strategy by overriding the Stack's get availabilityZones() method:

// Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
class MyStack : Stack
{get availabilityZones(): string[] {
        return ['us-west-2a', 'us-west-2b'];
      }

    public MyClass(Construct scope, string id, StackProps? props=null) : base(scope, id, props)
    {
    }
}

Note that overriding the get availabilityZones() method will override the default behavior for all constructs defined within the Stack.

Choosing subnets for resources

When creating resources that create Elastic Network Interfaces (such as databases or instances), there is an option to choose which subnets to place them in. For example, a VPC endpoint by default is placed into a subnet in every availability zone, but you can override which subnets to use. The property is typically called one of subnets, vpcSubnets or subnetSelection.

The example below will place the endpoint into two AZs (us-east-1a and us-east-1c), in Isolated subnets:

// Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
new InterfaceVpcEndpoint(stack, "VPC Endpoint", new Struct {
    Vpc = vpc,
    Service = new InterfaceVpcEndpointService("com.amazonaws.vpce.us-east-1.vpce-svc-uuddlrlrbastrtsvc", 443),
    Subnets = new Struct {
        SubnetType = SubnetType.ISOLATED,
        AvailabilityZones = new [] { "us-east-1a", "us-east-1c" }
    }
});

You can also specify specific subnet objects for granular control:

// Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
new InterfaceVpcEndpoint(stack, "VPC Endpoint", new Struct {
    Vpc = vpc,
    Service = new InterfaceVpcEndpointService("com.amazonaws.vpce.us-east-1.vpce-svc-uuddlrlrbastrtsvc", 443),
    Subnets = new Struct {
        Subnets = new [] { subnet1, subnet2 }
    }
});

Which subnets are selected is evaluated as follows:

Using NAT instances

By default, the Vpc construct will create NAT gateways for you, which are managed by AWS. If you would prefer to use your own managed NAT instances instead, specify a different value for the natGatewayProvider property, as follows:

// Example automatically generated. See https://github.com/aws/jsii/issues/826
// Configure the `natGatewayProvider` when defining a Vpc
NatInstanceProvider natGatewayProvider = NatProvider.Instance(new NatInstanceProps {
    InstanceType = new InstanceType("t3.small")
});

Vpc vpc = new Vpc(this, "MyVpc", new VpcProps {
    NatGatewayProvider = natGatewayProvider,

    // The 'natGateways' parameter now controls the number of NAT instances
    NatGateways = 2
});

The construct will automatically search for the most recent NAT gateway AMI. If you prefer to use a custom AMI, use machineImage: MachineImage.genericLinux({ ... }) and configure the right AMI ID for the regions you want to deploy to.

By default, the NAT instances will route all traffic. To control what traffic gets routed, pass allowAllTraffic: false and access the NatInstanceProvider.connections member after having passed it to the VPC:

// Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
var provider = NatProvider.Instance(new Struct {
    InstanceType = ,
    AllowAllTraffic = false
});
new Vpc(stack, "TheVPC", new Struct {
    NatGatewayProvider = provider
});
provider.Connections.AllowFrom(Peer.Ipv4("1.2.3.4/8"), Port.Tcp(80));

Advanced Subnet Configuration

If the default VPC configuration (public and private subnets spanning the size of the VPC) don't suffice for you, you can configure what subnets to create by specifying the subnetConfiguration property. It allows you to configure the number and size of all subnets. Specifying an advanced subnet configuration could look like this:

// Example automatically generated. See https://github.com/aws/jsii/issues/826
Vpc vpc = new Vpc(this, "TheVPC", new VpcProps {
    // 'cidr' configures the IP range and size of the entire VPC.
    // The IP space will be divided over the configured subnets.
    Cidr = "10.0.0.0/21",

    // 'maxAzs' configures the maximum number of availability zones to use
    MaxAzs = 3,

    // 'subnetConfiguration' specifies the "subnet groups" to create.
    // Every subnet group will have a subnet for each AZ, so this
    // configuration will create `3 groups × 3 AZs = 9` subnets.
    SubnetConfiguration = new [] { new SubnetConfiguration {
        // 'subnetType' controls Internet access, as described above.
        SubnetType = SubnetType.PUBLIC,

        // 'name' is used to name this particular subnet group. You will have to
        // use the name for subnet selection if you have more than one subnet
        // group of the same type.
        Name = "Ingress",

        // 'cidrMask' specifies the IP addresses in the range of of individual
        // subnets in the group. Each of the subnets in this group will contain
        // `2^(32 address bits - 24 subnet bits) - 2 reserved addresses = 254`
        // usable IP addresses.
        //
        // If 'cidrMask' is left out the available address space is evenly
        // divided across the remaining subnet groups.
        CidrMask = 24
    }, new SubnetConfiguration {
        CidrMask = 24,
        Name = "Application",
        SubnetType = SubnetType.PRIVATE
    }, new SubnetConfiguration {
        CidrMask = 28,
        Name = "Database",
        SubnetType = SubnetType.ISOLATED,

        // 'reserved' can be used to reserve IP address space. No resources will
        // be created for this subnet, but the IP range will be kept available for
        // future creation of this subnet, or even for future subdivision.
        Reserved = true
    } }
});

The example above is one possible configuration, but the user can use the constructs above to implement many other network configurations.

The Vpc from the above configuration in a Region with three availability zones will be the following:

Subnet Name	Type	IP Block	AZ	Features
IngressSubnet1	`PUBLIC`	`10.0.0.0/24`	#1	NAT Gateway
IngressSubnet2	`PUBLIC`	`10.0.1.0/24`	#2	NAT Gateway
IngressSubnet3	`PUBLIC`	`10.0.2.0/24`	#3	NAT Gateway
ApplicationSubnet1	`PRIVATE`	`10.0.3.0/24`	#1	Route to NAT in IngressSubnet1
ApplicationSubnet2	`PRIVATE`	`10.0.4.0/24`	#2	Route to NAT in IngressSubnet2
ApplicationSubnet3	`PRIVATE`	`10.0.5.0/24`	#3	Route to NAT in IngressSubnet3
DatabaseSubnet1	`ISOLATED`	`10.0.6.0/28`	#1	Only routes within the VPC
DatabaseSubnet2	`ISOLATED`	`10.0.6.16/28`	#2	Only routes within the VPC
DatabaseSubnet3	`ISOLATED`	`10.0.6.32/28`	#3	Only routes within the VPC

Accessing the Internet Gateway

If you need access to the internet gateway, you can get it's ID like so:

// Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
var igwId = vpc.InternetGatewayId;

For a VPC with only ISOLATED subnets, this value will be undefined.

This is only supported for VPCs created in the stack - currently you're unable to get the ID for imported VPCs. To do that you'd have to specifically look up the Internet Gateway by name, which would require knowing the name beforehand.

This can be useful for configuring routing using a combination of gateways: for more information see Routing below.

Routing

It's possible to add routes to any subnets using the addRoute() method. If for example you want an isolated subnet to have a static route via the default Internet Gateway created for the public subnet - perhaps for routing a VPN connection - you can do so like this:

// Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
var vpc = Vpc(this, "VPC", new Struct {
    SubnetConfiguration = new [] { new Struct {
        SubnetType = SubnetType.PUBLIC,
        Name = "Public"
    }, new Struct {
        SubnetType = SubnetType.ISOLATED,
        Name = "Isolated"
    } }
})((Subnet)vpc.isolatedSubnets[0]).AddRoute("StaticRoute", new Struct {
    RouterId = vpc.InternetGatewayId,
    RouterType = RouterType.GATEWAY,
    DestinationCidrBlock = "8.8.8.8/32"
});

Note that we cast to Subnet here because the list of subnets only returns an ISubnet.

Reserving subnet IP space

There are situations where the IP space for a subnet or number of subnets will need to be reserved. This is useful in situations where subnets would need to be added after the vpc is originally deployed, without causing IP renumbering for existing subnets. The IP space for a subnet may be reserved by setting the reserved subnetConfiguration property to true, as shown below:

// Example automatically generated. See https://github.com/aws/jsii/issues/826
Vpc vpc = new Vpc(this, "TheVPC", new VpcProps {
    NatGateways = 1,
    SubnetConfiguration = new [] { new SubnetConfiguration {
        CidrMask = 26,
        Name = "Public",
        SubnetType = SubnetType.PUBLIC
    }, new SubnetConfiguration {
        CidrMask = 26,
        Name = "Application1",
        SubnetType = SubnetType.PRIVATE
    }, new SubnetConfiguration {
        CidrMask = 26,
        Name = "Application2",
        SubnetType = SubnetType.PRIVATE,
        Reserved = true
    }, new SubnetConfiguration {
        CidrMask = 27,
        Name = "Database",
        SubnetType = SubnetType.ISOLATED
    } }
});

In the example above, the subnet for Application2 is not actually provisioned but its IP space is still reserved. If in the future this subnet needs to be provisioned, then the reserved: true property should be removed. Reserving parts of the IP space prevents the other subnets from getting renumbered.

Sharing VPCs between stacks

If you are creating multiple Stacks inside the same CDK application, you can reuse a VPC defined in one Stack in another by simply passing the VPC instance around:

// Example automatically generated. See https://github.com/aws/jsii/issues/826
/**
 * Stack1 creates the VPC
 */
class Stack1 : Stack
{
    public Vpc Vpc { get; }

    public MyClass(App scope, string id, StackProps? props=null) : base(scope, id, props)
    {

        Vpc = new Vpc(this, "VPC");
    }
}

class Stack2Props : StackProps
{
    public IVpc Vpc { get; set; }
}

/**
 * Stack2 consumes the VPC
 */
class Stack2 : Stack
{
    public MyClass(App scope, string id, Stack2Props props) : base(scope, id, props)
    {

        // Pass the VPC to a construct that needs it
        // Pass the VPC to a construct that needs it
        new ConstructThatTakesAVpc(this, "Construct", new ConstructThatTakesAVpcProps {
            Vpc = props.Vpc
        });
    }
}

Stack1 stack1 = new Stack1(app, "Stack1");
Stack2 stack2 = new Stack2(app, "Stack2", new Stack2Props {
    Vpc = stack1.Vpc
});

Importing an existing VPC

If your VPC is created outside your CDK app, you can use Vpc.fromLookup(). The CDK CLI will search for the specified VPC in the the stack's region and account, and import the subnet configuration. Looking up can be done by VPC ID, but more flexibly by searching for a specific tag on the VPC.

Subnet types will be determined from the aws-cdk:subnet-type tag on the subnet if it exists, or the presence of a route to an Internet Gateway otherwise. Subnet names will be determined from the aws-cdk:subnet-name tag on the subnet if it exists, or will mirror the subnet type otherwise (i.e. a public subnet will have the name "Public").

Here's how Vpc.fromLookup() can be used:

// Example automatically generated. See https://github.com/aws/jsii/issues/826
IVpc vpc = Vpc.FromLookup(stack, "VPC", new VpcLookupOptions {
    // This imports the default VPC but you can also
    // specify a 'vpcName' or 'tags'.
    IsDefault = true
});

Allowing Connections

In AWS, all network traffic in and out of Elastic Network Interfaces (ENIs) is controlled by Security Groups. You can think of Security Groups as a firewall with a set of rules. By default, Security Groups allow no incoming (ingress) traffic and all outgoing (egress) traffic. You can add ingress rules to them to allow incoming traffic streams. To exert fine-grained control over egress traffic, set allowAllOutbound: false on the SecurityGroup, after which you can add egress traffic rules.

You can manipulate Security Groups directly:

// Example automatically generated. See https://github.com/aws/jsii/issues/826
SecurityGroup mySecurityGroup = new SecurityGroup(this, "SecurityGroup", new SecurityGroupProps {
    Vpc = vpc,
    Description = "Allow ssh access to ec2 instances",
    AllowAllOutbound = true
});
mySecurityGroup.AddIngressRule(Peer.AnyIpv4(), Port.Tcp(22), "allow ssh access from the world");

All constructs that create ENIs on your behalf (typically constructs that create EC2 instances or other VPC-connected resources) will all have security groups automatically assigned. Those constructs have an attribute called connections, which is an object that makes it convenient to update the security groups. If you want to allow connections between two constructs that have security groups, you have to add an Egress rule to one Security Group, and an Ingress rule to the other. The connections object will automatically take care of this for you:

// Example automatically generated. See https://github.com/aws/jsii/issues/826
// Allow connections from anywhere
loadBalancer.Connections.AllowFromAnyIpv4(Port.Tcp(443), "Allow inbound HTTPS");

// The same, but an explicit IP address
loadBalancer.Connections.AllowFrom(Peer.Ipv4("1.2.3.4/32"), Port.Tcp(443), "Allow inbound HTTPS");

// Allow connection between AutoScalingGroups
appFleet.Connections.AllowTo(dbFleet, Port.Tcp(443), "App can call database");

Connection Peers

There are various classes that implement the connection peer part:

// Example automatically generated. See https://github.com/aws/jsii/issues/826
// Simple connection peers
IPeer peer = Peer.Ipv4("10.0.0.0/16");
peer = Peer.AnyIpv4();
peer = Peer.Ipv6("::0/0");
peer = Peer.AnyIpv6();
peer = Peer.PrefixList("pl-12345");
appFleet.Connections.AllowTo(peer, Port.Tcp(443), "Allow outbound HTTPS");

Any object that has a security group can itself be used as a connection peer:

// Example automatically generated. See https://github.com/aws/jsii/issues/826
// These automatically create appropriate ingress and egress rules in both security groups
fleet1.Connections.AllowTo(fleet2, Port.Tcp(80), "Allow between fleets");

appFleet.Connections.AllowFromAnyIpv4(Port.Tcp(80), "Allow from load balancer");

Port Ranges

The connections that are allowed are specified by port ranges. A number of classes provide the connection specifier:

// Example automatically generated. See https://github.com/aws/jsii/issues/826
Port.Tcp(80);
Port.TcpRange(60000, 65535);
Port.AllTcp();
Port.AllTraffic();

NOTE: This set is not complete yet; for example, there is no library support for ICMP at the moment.
However, you can write your own classes to implement those.

Default Ports

Some Constructs have default ports associated with them. For example, the listener of a load balancer does (it's the public port), or instances of an RDS database (it's the port the database is accepting connections on).

If the object you're calling the peering method on has a default port associated with it, you can call allowDefaultPortFrom() and omit the port specifier. If the argument has an associated default port, call allowDefaultPortTo().

For example:

// Example automatically generated. See https://github.com/aws/jsii/issues/826
// Port implicit in listener
listener.Connections.AllowDefaultPortFromAnyIpv4("Allow public");

// Port implicit in peer
appFleet.Connections.AllowDefaultPortTo(rdsDatabase, "Fleet can access database");

Machine Images (AMIs)

AMIs control the OS that gets launched when you start your EC2 instance. The EC2 library contains constructs to select the AMI you want to use.

Depending on the type of AMI, you select it a different way. Here are some examples of things you might want to use:

// Example automatically generated. See https://github.com/aws/jsii/issues/826
// Pick the right Amazon Linux edition. All arguments shown are optional
// and will default to these values when omitted.
IMachineImage amznLinux = MachineImage.LatestAmazonLinux(new AmazonLinuxImageProps {
    Generation = AmazonLinuxGeneration.AMAZON_LINUX,
    Edition = AmazonLinuxEdition.STANDARD,
    Virtualization = AmazonLinuxVirt.HVM,
    Storage = AmazonLinuxStorage.GENERAL_PURPOSE,
    CpuType = AmazonLinuxCpuType.X86_64
});

// Pick a Windows edition to use
IMachineImage windows = MachineImage.LatestWindows(WindowsVersion.WINDOWS_SERVER_2019_ENGLISH_FULL_BASE);

// Read AMI id from SSM parameter store
IMachineImage ssm = MachineImage.FromSSMParameter("/my/ami", OperatingSystemType.LINUX);

// Look up the most recent image matching a set of AMI filters.
// In this case, look up the NAT instance AMI, by using a wildcard
// in the 'name' field:
IMachineImage natAmi = MachineImage.Lookup(new LookupMachineImageProps {
    Name = "amzn-ami-vpc-nat-*",
    Owners = new [] { "amazon" }
});

// For other custom (Linux) images, instantiate a `GenericLinuxImage` with
// a map giving the AMI to in for each region:
IMachineImage linux = MachineImage.GenericLinux(new Dictionary<string, string> {
    { "us-east-1", "ami-97785bed" },
    { "eu-west-1", "ami-12345678" }
});

// For other custom (Windows) images, instantiate a `GenericWindowsImage` with
// a map giving the AMI to in for each region:
IMachineImage genericWindows = MachineImage.GenericWindows(new Dictionary<string, string> {
    { "us-east-1", "ami-97785bed" },
    { "eu-west-1", "ami-12345678" }
});

NOTE: The AMIs selected by <code>MachineImage.lookup()</code> will be cached in

cdk.context.json, so that your AutoScalingGroup instances aren't replaced while you are making unrelated changes to your CDK app.

To query for the latest AMI again, remove the relevant cache entry from cdk.context.json, or use the cdk context command. For more information, see Runtime Context in the CDK developer guide.

Special VPC configurations

VPN connections to a VPC

Create your VPC with VPN connections by specifying the vpnConnections props (keys are construct ids):

// Example automatically generated. See https://github.com/aws/jsii/issues/826
Vpc vpc = new Vpc(this, "MyVpc", new VpcProps {
    VpnConnections = new Dictionary<string, VpnConnectionOptions> {
        { "dynamic", new VpnConnectionOptions { // Dynamic routing (BGP)
            Ip = "1.2.3.4" } },
        { "static", new VpnConnectionOptions { // Static routing
            Ip = "4.5.6.7",
            StaticRoutes = new [] { "192.168.10.0/24", "192.168.20.0/24" } } }
    }
});

To create a VPC that can accept VPN connections, set vpnGateway to true:

// Example automatically generated. See https://github.com/aws/jsii/issues/826
Vpc vpc = new Vpc(this, "MyVpc", new VpcProps {
    VpnGateway = true
});

VPN connections can then be added:

// Example automatically generated. See https://github.com/aws/jsii/issues/826
vpc.AddVpnConnection("Dynamic", new VpnConnectionOptions {
    Ip = "1.2.3.4"
});

By default, routes will be propagated on the route tables associated with the private subnets. If no private subnets exists, isolated subnets are used. If no isolated subnets exists, public subnets are used. Use the Vpc property vpnRoutePropagation to customize this behavior.

VPN connections expose metrics (cloudwatch.Metric) across all tunnels in the account/region and per connection:

// Example automatically generated. See https://github.com/aws/jsii/issues/826
// Across all tunnels in the account/region
Metric allDataOut = VpnConnection.MetricAllTunnelDataOut();

// For a specific vpn connection
VpnConnection vpnConnection = vpc.AddVpnConnection("Dynamic", new VpnConnectionOptions {
    Ip = "1.2.3.4"
});
Metric state = vpnConnection.MetricTunnelState();

VPC endpoints

A VPC endpoint enables you to privately connect your VPC to supported AWS services and VPC endpoint services powered by PrivateLink without requiring an internet gateway, NAT device, VPN connection, or AWS Direct Connect connection. Instances in your VPC do not require public IP addresses to communicate with resources in the service. Traffic between your VPC and the other service does not leave the Amazon network.

Endpoints are virtual devices. They are horizontally scaled, redundant, and highly available VPC components that allow communication between instances in your VPC and services without imposing availability risks or bandwidth constraints on your network traffic.

// Example automatically generated. See https://github.com/aws/jsii/issues/826
// Add gateway endpoints when creating the VPC
Vpc vpc = new Vpc(this, "MyVpc", new VpcProps {
    GatewayEndpoints = new Dictionary<string, GatewayVpcEndpointOptions> {
        { "S3", new GatewayVpcEndpointOptions {
            Service = GatewayVpcEndpointAwsService.S3
        } }
    }
});

// Alternatively gateway endpoints can be added on the VPC
GatewayVpcEndpoint dynamoDbEndpoint = vpc.AddGatewayEndpoint("DynamoDbEndpoint", new GatewayVpcEndpointOptions {
    Service = GatewayVpcEndpointAwsService.DYNAMODB
});

// This allows to customize the endpoint policy
dynamoDbEndpoint.AddToPolicy(
new PolicyStatement(new PolicyStatementProps { // Restrict to listing and describing tables
    Principals = new [] { new AnyPrincipal() },
    Actions = new [] { "dynamodb:DescribeTable", "dynamodb:ListTables" },
    Resources = new [] { "*" } }));

// Add an interface endpoint
vpc.AddInterfaceEndpoint("EcrDockerEndpoint", new Dictionary<string, IInterfaceVpcEndpointService> {
    { "service", InterfaceVpcEndpointAwsService.ECR_DOCKER }
});

By default, CDK will place a VPC endpoint in one subnet per AZ. If you wish to override the AZs CDK places the VPC endpoint in, use the subnets parameter as follows:

// Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
new InterfaceVpcEndpoint(stack, "VPC Endpoint", new Struct {
    Vpc = vpc,
    Service = new InterfaceVpcEndpointService("com.amazonaws.vpce.us-east-1.vpce-svc-uuddlrlrbastrtsvc", 443),
    // Choose which availability zones to place the VPC endpoint in, based on
    // available AZs
    Subnets = new Struct {
        AvailabilityZones = new [] { "us-east-1a", "us-east-1c" }
    }
});

Per the AWS documentation, not all VPC endpoint services are available in all AZs. If you specify the parameter lookupSupportedAzs, CDK attempts to discover which AZs an endpoint service is available in, and will ensure the VPC endpoint is not placed in a subnet that doesn't match those AZs. These AZs will be stored in cdk.context.json.

// Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
new InterfaceVpcEndpoint(stack, "VPC Endpoint", new Struct {
    Vpc = vpc,
    Service = new InterfaceVpcEndpointService("com.amazonaws.vpce.us-east-1.vpce-svc-uuddlrlrbastrtsvc", 443),
    // Choose which availability zones to place the VPC endpoint in, based on
    // available AZs
    LookupSupportedAzs = true
});

Security groups for interface VPC endpoints

By default, interface VPC endpoints create a new security group and traffic is not automatically allowed from the VPC CIDR.

Use the connections object to allow traffic to flow to the endpoint:

// Example automatically generated. See https://github.com/aws/jsii/issues/826
myEndpoint.Connections.AllowDefaultPortFromAnyIpv4();

Alternatively, existing security groups can be used by specifying the securityGroups prop.

VPC endpoint services

A VPC endpoint service enables you to expose a Network Load Balancer(s) as a provider service to consumers, who connect to your service over a VPC endpoint. You can restrict access to your service via whitelisted principals (anything that extends ArnPrincipal), and require that new connections be manually accepted.

// Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
new VpcEndpointService(this, "EndpointService", new Struct {
    VpcEndpointServiceLoadBalancers = new [] { networkLoadBalancer1, networkLoadBalancer2 },
    AcceptanceRequired = true,
    WhitelistedPrincipals = new [] { new ArnPrincipal("arn:aws:iam::123456789012:root") }
});

Instances

You can use the Instance class to start up a single EC2 instance. For production setups, we recommend you use an AutoScalingGroup from the aws-autoscaling module instead, as AutoScalingGroups will take care of restarting your instance if it ever fails.

Configuring Instances using CloudFormation Init (cfn-init)

CloudFormation Init allows you to configure your instances by writing files to them, installing software packages, starting services and running arbitrary commands. By default, if any of the instance setup commands throw an error, the deployment will fail and roll back to the previously known good state. The following documentation also applies to AutoScalingGroups.

For the full set of capabilities of this system, see the documentation for AWS::CloudFormation::Init. Here is an example of applying some configuration to an instance:

// Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
new Instance(this, "Instance", new Dictionary<string, CloudFormationInit?> {
    // Showing the most complex setup, if you have simpler requirements
    // you can use `CloudFormationInit.fromElements()`.
    { "init", CloudFormationInit.FromConfigSets(new ConfigSetProps {
        ConfigSets = new Dictionary<string, Array> {
            // Applies the configs below in this order
            { "default", new [] { "yumPreinstall", "config" } }
        },
        Configs = new Dictionary<string, InitConfig> {
            { "yumPreinstall", new InitConfig(new [] { InitPackage.Yum("git") }) },
            { "config", new InitConfig(new [] { InitFile.FromObject("/etc/stack.json", new Dictionary<string, object> {
                { "stackId", stack.StackId },
                { "stackName", stack.StackName },
                { "region", stack.Region }
            }), InitGroup.FromName("my-group"), InitUser.FromName("my-user"), InitPackage.Rpm("http://mirrors.ukfast.co.uk/sites/dl.fedoraproject.org/pub/epel/8/Everything/x86_64/Packages/r/rubygem-git-1.5.0-2.el8.noarch.rpm") }) }
        }
    }) },
    { "initOptions", new ApplyCloudFormationInitOptions {
        // Optional, which configsets to activate (['default'] by default)
        ConfigSets = new [] { "default" },

        // Optional, how long the installation is expected to take (5 minutes by default)
        Timeout = Duration.Minutes(30)
    } }
});

You can have services restarted after the init process has made changes to the system. To do that, instantiate an InitServiceRestartHandle and pass it to the config elements that need to trigger the restart and the service itself. For example, the following config writes a config file for nginx, extracts an archive to the root directory, and then restarts nginx so that it picks up the new config and files:

// Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
InitServiceRestartHandle handle = new InitServiceRestartHandle();

CloudFormationInit.FromElements(InitFile.FromString("/etc/nginx/nginx.conf", "...", new Dictionary<string, Array?> { { "serviceRestartHandles", new [] { handle } } }), InitSource.FromBucket("/var/www/html", myBucket, "html.zip", new Struct { ServiceRestartHandles = new [] { handle } }), InitService.Enable("nginx", new Dictionary<string, InitServiceRestartHandle?> {
    { "serviceRestartHandle", handle }
}));

Bastion Hosts

A bastion host functions as an instance used to access servers and resources in a VPC without open up the complete VPC on a network level. You can use bastion hosts using a standard SSH connection targeting port 22 on the host. As an alternative, you can connect the SSH connection feature of AWS Systems Manager Session Manager, which does not need an opened security group. (https://aws.amazon.com/about-aws/whats-new/2019/07/session-manager-launches-tunneling-support-for-ssh-and-scp/)

A default bastion host for use via SSM can be configured like:

// Example automatically generated. See https://github.com/aws/jsii/issues/826
BastionHostLinux host = new BastionHostLinux(this, "BastionHost", new BastionHostLinuxProps { Vpc = vpc });

If you want to connect from the internet using SSH, you need to place the host into a public subnet. You can then configure allowed source hosts.

// Example automatically generated. See https://github.com/aws/jsii/issues/826
BastionHostLinux host = new BastionHostLinux(this, "BastionHost", new BastionHostLinuxProps {
    Vpc = vpc,
    SubnetSelection = new SubnetSelection { SubnetType = SubnetType.PUBLIC }
});
host.AllowSshAccessFrom(Peer.Ipv4("1.2.3.4/32"));

As there are no SSH public keys deployed on this machine, you need to use EC2 Instance Connect with the command aws ec2-instance-connect send-ssh-public-key to provide your SSH public key.

EBS volume for the bastion host can be encrypted like:

// Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
BastionHostLinux host = new BastionHostLinux(stack, "BastionHost", new BastionHostLinuxProps {
    Vpc = vpc,
    BlockDevices = new [] { new BlockDevice {
        DeviceName = "EBSBastionHost",
        Volume = BlockDeviceVolume.Ebs(10, new Struct {
            Encrypted = true
        })
    } }
});

Block Devices

To add EBS block device mappings, specify the blockDevices property. The following example sets the EBS-backed root device (/dev/sda1) size to 50 GiB, and adds another EBS-backed device mapped to /dev/sdm that is 100 GiB in size:

// Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
new Instance(this, "Instance", new Dictionary<string, Array?> {
    // ...
    { "blockDevices", new [] { new BlockDevice {
        DeviceName = "/dev/sda1",
        Volume = BlockDeviceVolume.Ebs(50)
    }, new BlockDevice {
        DeviceName = "/dev/sdm",
        Volume = BlockDeviceVolume.Ebs(100)
    } } }
});

Volumes

Whereas a BlockDeviceVolume is an EBS volume that is created and destroyed as part of the creation and destruction of a specific instance. A Volume is for when you want an EBS volume separate from any particular instance. A Volume is an EBS block device that can be attached to, or detached from, any instance at any time. Some types of Volumes can also be attached to multiple instances at the same time to allow you to have shared storage between those instances.

A notable restriction is that a Volume can only be attached to instances in the same availability zone as the Volume itself.

The following demonstrates how to create a 500 GiB encrypted Volume in the us-west-2a availability zone, and give a role the ability to attach that Volume to a specific instance:

// Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
Instance instance = new Instance(this, "Instance", new Dictionary<string, object> { });
Role role = new Role(stack, "SomeRole", new RoleProps {
    AssumedBy = new AccountRootPrincipal()
});
Volume volume = new Volume(this, "Volume", new VolumeProps {
    AvailabilityZone = "us-west-2a",
    Size = cdk.Size.Gibibytes(500),
    Encrypted = true
});

volume.GrantAttachVolume(role, new [] { instance });

Instances Attaching Volumes to Themselves

If you need to grant an instance the ability to attach/detach an EBS volume to/from itself, then using grantAttachVolume and grantDetachVolume as outlined above will lead to an unresolvable circular reference between the instance role and the instance. In this case, use grantAttachVolumeByResourceTag and grantDetachVolumeByResourceTag as follows:

// Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
Instance instance = new Instance(this, "Instance", new Dictionary<string, object> { });
Volume volume = new Volume(this, "Volume", new VolumeProps { });

Grant attachGrant = volume.GrantAttachVolumeByResourceTag(instance.GrantPrincipal, new [] { instance });
Grant detachGrant = volume.GrantDetachVolumeByResourceTag(instance.GrantPrincipal, new [] { instance });

Attaching Volumes

The Amazon EC2 documentation for Linux Instances and Windows Instances contains information on how to attach and detach your Volumes to/from instances, and how to format them for use.

The following is a sample skeleton of EC2 UserData that can be used to attach a Volume to the Linux instance that it is running on:

// Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
Volume volume = new Volume(this, "Volume", new VolumeProps { });
Instance instance = new Instance(this, "Instance", new Dictionary<string, object> { });
volume.GrantAttachVolumeByResourceTag(instance.GrantPrincipal, new [] { instance });
string targetDevice = "/dev/xvdz";
instance.UserData.AddCommands($"aws --region {Stack.of(this).region} ec2 attach-volume --volume-id {volume.volumeId} --instance-id {instance.instanceId} --device {targetDevice}", $"while ! test -e {targetDevice}; do sleep 1; done");

VPC Flow Logs

VPC Flow Logs is a feature that enables you to capture information about the IP traffic going to and from network interfaces in your VPC. Flow log data can be published to Amazon CloudWatch Logs and Amazon S3. After you've created a flow log, you can retrieve and view its data in the chosen destination. (https://docs.aws.amazon.com/vpc/latest/userguide/flow-logs.html).

By default a flow log will be created with CloudWatch Logs as the destination.

You can create a flow log like this:

// Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
new FlowLog(this, "FlowLog", new FlowLogProps {
    ResourceType = FlowLogResourceType.FromVpc(vpc)
});

Or you can add a Flow Log to a VPC by using the addFlowLog method like this:

// Example automatically generated. See https://github.com/aws/jsii/issues/826
Vpc vpc = new Vpc(this, "Vpc");

vpc.AddFlowLog("FlowLog");

You can also add multiple flow logs with different destinations.

// Example automatically generated. See https://github.com/aws/jsii/issues/826
Vpc vpc = new Vpc(this, "Vpc");

vpc.AddFlowLog("FlowLogS3", new FlowLogOptions {
    Destination = FlowLogDestination.ToS3()
});

vpc.AddFlowLog("FlowLogCloudWatch", new FlowLogOptions {
    TrafficType = FlowLogTrafficType.REJECT
});

By default the CDK will create the necessary resources for the destination. For the CloudWatch Logs destination it will create a CloudWatch Logs Log Group as well as the IAM role with the necessary permissions to publish to the log group. In the case of an S3 destination, it will create the S3 bucket.

If you want to customize any of the destination resources you can provide your own as part of the destination.

CloudWatch Logs

// Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
var logGroup = new logs.LogGroup(this, "MyCustomLogGroup");

Role role = new Role(this, "MyCustomRole", new RoleProps {
    AssumedBy = new ServicePrincipal("vpc-flow-logs.amazonaws.com")
});

new FlowLog(this, "FlowLog", new FlowLogProps {
    ResourceType = FlowLogResourceType.FromVpc(vpc),
    Destination = FlowLogDestination.ToCloudWatchLogs(logGroup, role)
});

// Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
var bucket = new s3.Bucket(this, "MyCustomBucket");

new FlowLog(this, "FlowLog", new FlowLogProps {
    ResourceType = FlowLogResourceType.FromVpc(vpc),
    Destination = FlowLogDestination.ToS3(bucket)
});

new FlowLog(this, "FlowLogWithKeyPrefix", new FlowLogProps {
    ResourceType = FlowLogResourceType.FromVpc(vpc),
    Destination = FlowLogDestination.ToS3(bucket, "prefix/")
});

User Data

User data enables you to run a script when your instances start up. In order to configure these scripts you can add commands directly to the script or you can use the UserData's convenience functions to aid in the creation of your script.

A user data could be configured to run a script found in an asset through the following:

// Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
var asset = new Asset(this, "Asset", new Struct { Path = path.Join(__dirname, "configure.sh") });
Instance instance = new Instance(this, "Instance", new Dictionary<string, object> { });
string localPath = instance.UserData.AddS3DownloadCommand(new S3DownloadOptions {
    Bucket = asset.Bucket,
    BucketKey = asset.S3ObjectKey
});
instance.UserData.AddExecuteFileCommand(new ExecuteFileOptions {
    FilePath = localPath,
    Arguments = "--verbose -y"
});
asset.GrantRead(instance.Role);

Importing existing subnet

To import an existing Subnet, call Subnet.fromSubnetAttributes() or Subnet.fromSubnetId(). Only if you supply the subnet's Availability Zone and Route Table Ids when calling Subnet.fromSubnetAttributes() will you be able to use the CDK features that use these values (such as selecting one subnet per AZ).

Importing an existing subnet looks like this:

// Example automatically generated without compilation. See https://github.com/aws/jsii/issues/826
// Supply all properties
var subnet = Subnet.FromSubnetAttributes(this, "SubnetFromAttributes", new Struct {
    SubnetId = "s-1234",
    AvailabilityZone = "pub-az-4465",
    RouteTableId = "rt-145"
});

// Supply only subnet id
var subnet = Subnet.FromSubnetId(this, "SubnetFromId", "s-1234");

Classes

AclCidr	(experimental) Either an IPv4 or an IPv6 CIDR.
AclCidrConfig	(experimental) Acl Configuration for CIDR.
AclIcmp	(experimental) Properties to create Icmp.
AclPortRange	(experimental) Properties to create PortRange.
AclTraffic	(experimental) The traffic that is configured using a Network ACL entry.
AclTrafficConfig	(experimental) Acl Configuration for traffic.
Action	(experimental) What action to apply to traffic matching the ACL.
AddRouteOptions	Options for adding a new route to a subnet.
AmazonLinuxCpuType	CPU type.
AmazonLinuxEdition	Amazon Linux edition.
AmazonLinuxGeneration	What generation of Amazon Linux to use.
AmazonLinuxImage	Selects the latest version of Amazon Linux.
AmazonLinuxImageProps	Amazon Linux image properties.
AmazonLinuxStorage
AmazonLinuxVirt	Virtualization type for Amazon Linux.
ApplyCloudFormationInitOptions	Options for applying CloudFormation init to an instance or instance group.
AttachInitOptions	Options for attaching a CloudFormationInit to a resource.
BastionHostLinux	(experimental) This creates a linux bastion host you can use to connect to other instances or services in your VPC.
BastionHostLinuxProps	(experimental) Properties of the bastion host.
BlockDevice	Block device.
BlockDeviceVolume	Describes a block device mapping for an EC2 instance or Auto Scaling group.
CfnCapacityReservation	A CloudFormation `AWS::EC2::CapacityReservation`.
CfnCapacityReservation.TagSpecificationProperty
CfnCapacityReservationProps	Properties for defining a `AWS::EC2::CapacityReservation`.
CfnCarrierGateway	A CloudFormation `AWS::EC2::CarrierGateway`.
CfnCarrierGateway.TagsProperty
CfnCarrierGatewayProps	Properties for defining a `AWS::EC2::CarrierGateway`.
CfnClientVpnAuthorizationRule	A CloudFormation `AWS::EC2::ClientVpnAuthorizationRule`.
CfnClientVpnAuthorizationRuleProps	Properties for defining a `AWS::EC2::ClientVpnAuthorizationRule`.
CfnClientVpnEndpoint	A CloudFormation `AWS::EC2::ClientVpnEndpoint`.
CfnClientVpnEndpoint.CertificateAuthenticationRequestProperty
CfnClientVpnEndpoint.ClientAuthenticationRequestProperty
CfnClientVpnEndpoint.ClientConnectOptionsProperty
CfnClientVpnEndpoint.ConnectionLogOptionsProperty
CfnClientVpnEndpoint.DirectoryServiceAuthenticationRequestProperty
CfnClientVpnEndpoint.FederatedAuthenticationRequestProperty
CfnClientVpnEndpoint.TagSpecificationProperty
CfnClientVpnEndpointProps	Properties for defining a `AWS::EC2::ClientVpnEndpoint`.
CfnClientVpnRoute	A CloudFormation `AWS::EC2::ClientVpnRoute`.
CfnClientVpnRouteProps	Properties for defining a `AWS::EC2::ClientVpnRoute`.
CfnClientVpnTargetNetworkAssociation	A CloudFormation `AWS::EC2::ClientVpnTargetNetworkAssociation`.
CfnClientVpnTargetNetworkAssociationProps	Properties for defining a `AWS::EC2::ClientVpnTargetNetworkAssociation`.
CfnCustomerGateway	A CloudFormation `AWS::EC2::CustomerGateway`.
CfnCustomerGatewayProps	Properties for defining a `AWS::EC2::CustomerGateway`.
CfnDHCPOptions	A CloudFormation `AWS::EC2::DHCPOptions`.
CfnDHCPOptionsProps	Properties for defining a `AWS::EC2::DHCPOptions`.
CfnEC2Fleet	A CloudFormation `AWS::EC2::EC2Fleet`.
CfnEC2Fleet.CapacityReservationOptionsRequestProperty
CfnEC2Fleet.FleetLaunchTemplateConfigRequestProperty
CfnEC2Fleet.FleetLaunchTemplateOverridesRequestProperty
CfnEC2Fleet.FleetLaunchTemplateSpecificationRequestProperty
CfnEC2Fleet.OnDemandOptionsRequestProperty
CfnEC2Fleet.PlacementProperty
CfnEC2Fleet.SpotOptionsRequestProperty
CfnEC2Fleet.TagSpecificationProperty
CfnEC2Fleet.TargetCapacitySpecificationRequestProperty
CfnEC2FleetProps	Properties for defining a `AWS::EC2::EC2Fleet`.
CfnEgressOnlyInternetGateway	A CloudFormation `AWS::EC2::EgressOnlyInternetGateway`.
CfnEgressOnlyInternetGatewayProps	Properties for defining a `AWS::EC2::EgressOnlyInternetGateway`.
CfnEIP	A CloudFormation `AWS::EC2::EIP`.
CfnEIPAssociation	A CloudFormation `AWS::EC2::EIPAssociation`.
CfnEIPAssociationProps	Properties for defining a `AWS::EC2::EIPAssociation`.
CfnEIPProps	Properties for defining a `AWS::EC2::EIP`.
CfnFlowLog	A CloudFormation `AWS::EC2::FlowLog`.
CfnFlowLogProps	Properties for defining a `AWS::EC2::FlowLog`.
CfnGatewayRouteTableAssociation	A CloudFormation `AWS::EC2::GatewayRouteTableAssociation`.
CfnGatewayRouteTableAssociationProps	Properties for defining a `AWS::EC2::GatewayRouteTableAssociation`.
CfnHost	A CloudFormation `AWS::EC2::Host`.
CfnHostProps	Properties for defining a `AWS::EC2::Host`.
CfnInstance	A CloudFormation `AWS::EC2::Instance`.
CfnInstance.AssociationParameterProperty
CfnInstance.BlockDeviceMappingProperty
CfnInstance.CpuOptionsProperty
CfnInstance.CreditSpecificationProperty
CfnInstance.EbsProperty
CfnInstance.ElasticGpuSpecificationProperty
CfnInstance.ElasticInferenceAcceleratorProperty
CfnInstance.HibernationOptionsProperty
CfnInstance.InstanceIpv6AddressProperty
CfnInstance.LaunchTemplateSpecificationProperty
CfnInstance.LicenseSpecificationProperty
CfnInstance.NetworkInterfaceProperty
CfnInstance.NoDeviceProperty
CfnInstance.PrivateIpAddressSpecificationProperty
CfnInstance.SsmAssociationProperty
CfnInstance.VolumeProperty
CfnInstanceProps	Properties for defining a `AWS::EC2::Instance`.
CfnInternetGateway	A CloudFormation `AWS::EC2::InternetGateway`.
CfnInternetGatewayProps	Properties for defining a `AWS::EC2::InternetGateway`.
CfnLaunchTemplate	A CloudFormation `AWS::EC2::LaunchTemplate`.
CfnLaunchTemplate.BlockDeviceMappingProperty
CfnLaunchTemplate.CapacityReservationSpecificationProperty
CfnLaunchTemplate.CapacityReservationTargetProperty
CfnLaunchTemplate.CpuOptionsProperty
CfnLaunchTemplate.CreditSpecificationProperty
CfnLaunchTemplate.EbsProperty
CfnLaunchTemplate.ElasticGpuSpecificationProperty
CfnLaunchTemplate.HibernationOptionsProperty
CfnLaunchTemplate.IamInstanceProfileProperty
CfnLaunchTemplate.InstanceMarketOptionsProperty
CfnLaunchTemplate.Ipv6AddProperty
CfnLaunchTemplate.LaunchTemplateDataProperty
CfnLaunchTemplate.LaunchTemplateElasticInferenceAcceleratorProperty
CfnLaunchTemplate.LicenseSpecificationProperty
CfnLaunchTemplate.MetadataOptionsProperty
CfnLaunchTemplate.MonitoringProperty
CfnLaunchTemplate.NetworkInterfaceProperty
CfnLaunchTemplate.PlacementProperty
CfnLaunchTemplate.PrivateIpAddProperty
CfnLaunchTemplate.SpotOptionsProperty
CfnLaunchTemplate.TagSpecificationProperty
CfnLaunchTemplateProps	Properties for defining a `AWS::EC2::LaunchTemplate`.
CfnLocalGatewayRoute	A CloudFormation `AWS::EC2::LocalGatewayRoute`.
CfnLocalGatewayRouteProps	Properties for defining a `AWS::EC2::LocalGatewayRoute`.
CfnLocalGatewayRouteTableVPCAssociation	A CloudFormation `AWS::EC2::LocalGatewayRouteTableVPCAssociation`.
CfnLocalGatewayRouteTableVPCAssociation.TagsProperty
CfnLocalGatewayRouteTableVPCAssociationProps	Properties for defining a `AWS::EC2::LocalGatewayRouteTableVPCAssociation`.
CfnNatGateway	A CloudFormation `AWS::EC2::NatGateway`.
CfnNatGatewayProps	Properties for defining a `AWS::EC2::NatGateway`.
CfnNetworkAcl	A CloudFormation `AWS::EC2::NetworkAcl`.
CfnNetworkAclEntry	A CloudFormation `AWS::EC2::NetworkAclEntry`.
CfnNetworkAclEntry.IcmpProperty
CfnNetworkAclEntry.PortRangeProperty
CfnNetworkAclEntryProps	Properties for defining a `AWS::EC2::NetworkAclEntry`.
CfnNetworkAclProps	Properties for defining a `AWS::EC2::NetworkAcl`.
CfnNetworkInterface	A CloudFormation `AWS::EC2::NetworkInterface`.
CfnNetworkInterface.InstanceIpv6AddressProperty
CfnNetworkInterface.PrivateIpAddressSpecificationProperty
CfnNetworkInterfaceAttachment	A CloudFormation `AWS::EC2::NetworkInterfaceAttachment`.
CfnNetworkInterfaceAttachmentProps	Properties for defining a `AWS::EC2::NetworkInterfaceAttachment`.
CfnNetworkInterfacePermission	A CloudFormation `AWS::EC2::NetworkInterfacePermission`.
CfnNetworkInterfacePermissionProps	Properties for defining a `AWS::EC2::NetworkInterfacePermission`.
CfnNetworkInterfaceProps	Properties for defining a `AWS::EC2::NetworkInterface`.
CfnPlacementGroup	A CloudFormation `AWS::EC2::PlacementGroup`.
CfnPlacementGroupProps	Properties for defining a `AWS::EC2::PlacementGroup`.
CfnPrefixList	A CloudFormation `AWS::EC2::PrefixList`.
CfnPrefixList.EntryProperty
CfnPrefixListProps	Properties for defining a `AWS::EC2::PrefixList`.
CfnRoute	A CloudFormation `AWS::EC2::Route`.
CfnRouteProps	Properties for defining a `AWS::EC2::Route`.
CfnRouteTable	A CloudFormation `AWS::EC2::RouteTable`.
CfnRouteTableProps	Properties for defining a `AWS::EC2::RouteTable`.
CfnSecurityGroup	A CloudFormation `AWS::EC2::SecurityGroup`.
CfnSecurityGroup.EgressProperty
CfnSecurityGroup.IngressProperty
CfnSecurityGroupEgress	A CloudFormation `AWS::EC2::SecurityGroupEgress`.
CfnSecurityGroupEgressProps	Properties for defining a `AWS::EC2::SecurityGroupEgress`.
CfnSecurityGroupIngress	A CloudFormation `AWS::EC2::SecurityGroupIngress`.
CfnSecurityGroupIngressProps	Properties for defining a `AWS::EC2::SecurityGroupIngress`.
CfnSecurityGroupProps	Properties for defining a `AWS::EC2::SecurityGroup`.
CfnSpotFleet	A CloudFormation `AWS::EC2::SpotFleet`.
CfnSpotFleet.BlockDeviceMappingProperty
CfnSpotFleet.ClassicLoadBalancerProperty
CfnSpotFleet.ClassicLoadBalancersConfigProperty
CfnSpotFleet.EbsBlockDeviceProperty
CfnSpotFleet.FleetLaunchTemplateSpecificationProperty
CfnSpotFleet.GroupIdentifierProperty
CfnSpotFleet.IamInstanceProfileSpecificationProperty
CfnSpotFleet.InstanceIpv6AddressProperty
CfnSpotFleet.InstanceNetworkInterfaceSpecificationProperty
CfnSpotFleet.LaunchTemplateConfigProperty
CfnSpotFleet.LaunchTemplateOverridesProperty
CfnSpotFleet.LoadBalancersConfigProperty
CfnSpotFleet.PrivateIpAddressSpecificationProperty
CfnSpotFleet.SpotFleetLaunchSpecificationProperty
CfnSpotFleet.SpotFleetMonitoringProperty
CfnSpotFleet.SpotFleetRequestConfigDataProperty
CfnSpotFleet.SpotFleetTagSpecificationProperty
CfnSpotFleet.SpotPlacementProperty
CfnSpotFleet.TargetGroupProperty
CfnSpotFleet.TargetGroupsConfigProperty
CfnSpotFleetProps	Properties for defining a `AWS::EC2::SpotFleet`.
CfnSubnet	A CloudFormation `AWS::EC2::Subnet`.
CfnSubnetCidrBlock	A CloudFormation `AWS::EC2::SubnetCidrBlock`.
CfnSubnetCidrBlockProps	Properties for defining a `AWS::EC2::SubnetCidrBlock`.
CfnSubnetNetworkAclAssociation	A CloudFormation `AWS::EC2::SubnetNetworkAclAssociation`.
CfnSubnetNetworkAclAssociationProps	Properties for defining a `AWS::EC2::SubnetNetworkAclAssociation`.
CfnSubnetProps	Properties for defining a `AWS::EC2::Subnet`.
CfnSubnetRouteTableAssociation	A CloudFormation `AWS::EC2::SubnetRouteTableAssociation`.
CfnSubnetRouteTableAssociationProps	Properties for defining a `AWS::EC2::SubnetRouteTableAssociation`.
CfnTrafficMirrorFilter	A CloudFormation `AWS::EC2::TrafficMirrorFilter`.
CfnTrafficMirrorFilterProps	Properties for defining a `AWS::EC2::TrafficMirrorFilter`.
CfnTrafficMirrorFilterRule	A CloudFormation `AWS::EC2::TrafficMirrorFilterRule`.
CfnTrafficMirrorFilterRule.TrafficMirrorPortRangeProperty
CfnTrafficMirrorFilterRuleProps	Properties for defining a `AWS::EC2::TrafficMirrorFilterRule`.
CfnTrafficMirrorSession	A CloudFormation `AWS::EC2::TrafficMirrorSession`.
CfnTrafficMirrorSessionProps	Properties for defining a `AWS::EC2::TrafficMirrorSession`.
CfnTrafficMirrorTarget	A CloudFormation `AWS::EC2::TrafficMirrorTarget`.
CfnTrafficMirrorTargetProps	Properties for defining a `AWS::EC2::TrafficMirrorTarget`.
CfnTransitGateway	A CloudFormation `AWS::EC2::TransitGateway`.
CfnTransitGatewayAttachment	A CloudFormation `AWS::EC2::TransitGatewayAttachment`.
CfnTransitGatewayAttachmentProps	Properties for defining a `AWS::EC2::TransitGatewayAttachment`.
CfnTransitGatewayProps	Properties for defining a `AWS::EC2::TransitGateway`.
CfnTransitGatewayRoute	A CloudFormation `AWS::EC2::TransitGatewayRoute`.
CfnTransitGatewayRouteProps	Properties for defining a `AWS::EC2::TransitGatewayRoute`.
CfnTransitGatewayRouteTable	A CloudFormation `AWS::EC2::TransitGatewayRouteTable`.
CfnTransitGatewayRouteTableAssociation	A CloudFormation `AWS::EC2::TransitGatewayRouteTableAssociation`.
CfnTransitGatewayRouteTableAssociationProps	Properties for defining a `AWS::EC2::TransitGatewayRouteTableAssociation`.
CfnTransitGatewayRouteTablePropagation	A CloudFormation `AWS::EC2::TransitGatewayRouteTablePropagation`.
CfnTransitGatewayRouteTablePropagationProps	Properties for defining a `AWS::EC2::TransitGatewayRouteTablePropagation`.
CfnTransitGatewayRouteTableProps	Properties for defining a `AWS::EC2::TransitGatewayRouteTable`.
CfnVolume	A CloudFormation `AWS::EC2::Volume`.
CfnVolumeAttachment	A CloudFormation `AWS::EC2::VolumeAttachment`.
CfnVolumeAttachmentProps	Properties for defining a `AWS::EC2::VolumeAttachment`.
CfnVolumeProps	Properties for defining a `AWS::EC2::Volume`.
CfnVPC	A CloudFormation `AWS::EC2::VPC`.
CfnVPCCidrBlock	A CloudFormation `AWS::EC2::VPCCidrBlock`.
CfnVPCCidrBlockProps	Properties for defining a `AWS::EC2::VPCCidrBlock`.
CfnVPCDHCPOptionsAssociation	A CloudFormation `AWS::EC2::VPCDHCPOptionsAssociation`.
CfnVPCDHCPOptionsAssociationProps	Properties for defining a `AWS::EC2::VPCDHCPOptionsAssociation`.
CfnVPCEndpoint	A CloudFormation `AWS::EC2::VPCEndpoint`.
CfnVPCEndpointConnectionNotification	A CloudFormation `AWS::EC2::VPCEndpointConnectionNotification`.
CfnVPCEndpointConnectionNotificationProps	Properties for defining a `AWS::EC2::VPCEndpointConnectionNotification`.
CfnVPCEndpointProps	Properties for defining a `AWS::EC2::VPCEndpoint`.
CfnVPCEndpointService	A CloudFormation `AWS::EC2::VPCEndpointService`.
CfnVPCEndpointServicePermissions	A CloudFormation `AWS::EC2::VPCEndpointServicePermissions`.
CfnVPCEndpointServicePermissionsProps	Properties for defining a `AWS::EC2::VPCEndpointServicePermissions`.
CfnVPCEndpointServiceProps	Properties for defining a `AWS::EC2::VPCEndpointService`.
CfnVPCGatewayAttachment	A CloudFormation `AWS::EC2::VPCGatewayAttachment`.
CfnVPCGatewayAttachmentProps	Properties for defining a `AWS::EC2::VPCGatewayAttachment`.
CfnVPCPeeringConnection	A CloudFormation `AWS::EC2::VPCPeeringConnection`.
CfnVPCPeeringConnectionProps	Properties for defining a `AWS::EC2::VPCPeeringConnection`.
CfnVPCProps	Properties for defining a `AWS::EC2::VPC`.
CfnVPNConnection	A CloudFormation `AWS::EC2::VPNConnection`.
CfnVPNConnection.VpnTunnelOptionsSpecificationProperty
CfnVPNConnectionProps	Properties for defining a `AWS::EC2::VPNConnection`.
CfnVPNConnectionRoute	A CloudFormation `AWS::EC2::VPNConnectionRoute`.
CfnVPNConnectionRouteProps	Properties for defining a `AWS::EC2::VPNConnectionRoute`.
CfnVPNGateway	A CloudFormation `AWS::EC2::VPNGateway`.
CfnVPNGatewayProps	Properties for defining a `AWS::EC2::VPNGateway`.
CfnVPNGatewayRoutePropagation	A CloudFormation `AWS::EC2::VPNGatewayRoutePropagation`.
CfnVPNGatewayRoutePropagationProps	Properties for defining a `AWS::EC2::VPNGatewayRoutePropagation`.
CloudFormationInit	A CloudFormation-init configuration.
CommonNetworkAclEntryOptions	(experimental) Basic NetworkACL entry props.
ConfigSetProps	Options for CloudFormationInit.withConfigSets.
ConfigureNatOptions	(experimental) Options passed by the VPC when NAT needs to be configured.
ConnectionRule
Connections_	Manage the allowed network connections for constructs with Security Groups.
ConnectionsProps	Properties to intialize a new Connections object.
DefaultInstanceTenancy	The default tenancy of instances launched into the VPC.
EbsDeviceOptions	Block device options for an EBS volume.
EbsDeviceOptionsBase	Base block device options for an EBS volume.
EbsDeviceProps	Properties of an EBS block device.
EbsDeviceSnapshotOptions	Block device options for an EBS volume created from a snapshot.
EbsDeviceVolumeType	Supported EBS volume types for blockDevices.
EnableVpnGatewayOptions	Options for the Vpc.enableVpnGateway() method.
ExecuteFileOptions	Options when executing a file.
FlowLog	(experimental) A VPC flow log.
FlowLogDestination	(experimental) The destination type for the flow log.
FlowLogDestinationConfig	(experimental) Flow Log Destination configuration.
FlowLogDestinationType	(experimental) The available destination types for Flow Logs.
FlowLogOptions	(experimental) Options to add a flow log to a VPC.
FlowLogProps	(experimental) Properties of a VPC Flow Log.
FlowLogResourceType	(experimental) The type of resource to create the flow log for.
FlowLogTrafficType	(experimental) The type of VPC traffic to log.
GatewayConfig	Pair represents a gateway created by NAT Provider.
GatewayVpcEndpoint	A gateway VPC endpoint.
GatewayVpcEndpointAwsService	An AWS service for a gateway VPC endpoint.
GatewayVpcEndpointOptions	Options to add a gateway endpoint to a VPC.
GatewayVpcEndpointProps	Construction properties for a GatewayVpcEndpoint.
GenericLinuxImage	Construct a Linux machine image from an AMI map.
GenericLinuxImageProps	Configuration options for GenericLinuxImage.
GenericSSMParameterImage	Select the image based on a given SSM parameter.
GenericWindowsImage	Construct a Windows machine image from an AMI map.
GenericWindowsImageProps	Configuration options for GenericWindowsImage.
InitCommand	Command to execute on the instance.
InitCommandOptions	Options for InitCommand.
InitCommandWaitDuration	Represents a duration to wait after a command has finished, in case of a reboot (Windows only).
InitConfig	A collection of configuration elements.
InitElement	Base class for all CloudFormation Init elements.
InitFile	Create files on the EC2 instance.
InitFileAssetOptions	Additional options for creating an InitFile from an asset.
InitFileOptions	Options for InitFile.
InitGroup	Create Linux/UNIX groups and assign group IDs.
InitPackage	A package to be installed during cfn-init time.
InitService	A services that be enabled, disabled or restarted when the instance is launched.
InitServiceOptions	Options for an InitService.
InitServiceRestartHandle	An object that represents reasons to restart an InitService.
InitSource	Extract an archive into a directory.
InitSourceAssetOptions	Additional options for an InitSource that builds an asset from local files.
InitSourceOptions	Additional options for an InitSource.
InitUser	Create Linux/UNIX users and to assign user IDs.
InitUserOptions	Optional parameters used when creating a user.
Instance_	This represents a single EC2 instance.
InstanceClass	What class and generation of instance to use.
InstanceProps	Properties of an EC2 Instance.
InstanceSize	What size of instance to use.
InstanceType	Instance type for EC2 instances.
InterfaceVpcEndpoint	A interface VPC endpoint.
InterfaceVpcEndpointAttributes	Construction properties for an ImportedInterfaceVpcEndpoint.
InterfaceVpcEndpointAwsService	An AWS service for an interface VPC endpoint.
InterfaceVpcEndpointOptions	Options to add an interface endpoint to a VPC.
InterfaceVpcEndpointProps	Construction properties for an InterfaceVpcEndpoint.
InterfaceVpcEndpointService	A custom-hosted service for an interface VPC endpoint.
LinuxUserDataOptions	Options when constructing UserData for Linux.
LocationPackageOptions	Options for InitPackage.rpm/InitPackage.msi.
LookupMachineImage	A machine image whose AMI ID will be searched using DescribeImages.
LookupMachineImageProps	Properties for looking up an image.
MachineImage	Factory functions for standard Amazon Machine Image objects.
MachineImageConfig	Configuration for a machine image.
NamedPackageOptions	Options for InitPackage.yum/apt/rubyGem/python.
NatInstanceImage	(experimental) Machine image representing the latest NAT instance image.
NatInstanceProps	(experimental) Properties for a NAT instance.
NatInstanceProvider	NAT provider which uses NAT Instances.
NatProvider	(experimental) NAT providers.
NetworkAcl	(experimental) Define a new custom network ACL.
NetworkAclEntry	(experimental) Define an entry in a Network ACL table.
NetworkAclEntryProps	(experimental) Properties to create NetworkAclEntry.
NetworkAclProps	(experimental) Properties to create NetworkAcl.
OperatingSystemType	The OS type of a particular image.
Peer	Peer object factories (to be used in Security Group management).
Port	Interface for classes that provide the connection-specification parts of a security group rule.
PortProps	Properties to create a port range.
PrivateSubnet	Represents a private VPC subnet resource.
PrivateSubnetAttributes
PrivateSubnetProps
Protocol	Protocol for use in Connection Rules.
PublicSubnet	Represents a public VPC subnet resource.
PublicSubnetAttributes
PublicSubnetProps
RouterType	Type of router used in route.
S3DownloadOptions	Options when downloading files from S3.
SecurityGroup	Creates an Amazon EC2 security group within a VPC.
SecurityGroupImportOptions	Additional options for imported security groups.
SecurityGroupProps
SelectedSubnets	Result of selecting a subset of subnets from a VPC.
Subnet	Represents a new VPC subnet resource.
SubnetAttributes
SubnetConfiguration	Specify configuration parameters for a single subnet group in a VPC.
SubnetFilter	Contains logic which chooses a set of subnets from a larger list, in conjunction with SubnetSelection, to determine where to place AWS resources such as VPC endpoints, EC2 instances, etc.
SubnetNetworkAclAssociation
SubnetNetworkAclAssociationProps	(experimental) Properties to create a SubnetNetworkAclAssociation.
SubnetProps	Specify configuration parameters for a VPC subnet.
SubnetSelection	Customize subnets that are selected for placement of ENIs.
SubnetType	The type of Subnet.
TrafficDirection	(experimental) Direction of traffic the AclEntry applies to.
UserData	Instance User Data.
Volume	Creates a new EBS Volume in AWS EC2.
VolumeAttributes	Attributes required to import an existing EBS Volume into the Stack.
VolumeProps	Properties of an EBS Volume.
Vpc	Define an AWS Virtual Private Cloud.
VpcAttributes	Properties that reference an external Vpc.
VpcEndpoint
VpcEndpointService	(experimental) A VPC endpoint service.
VpcEndpointServiceProps	(experimental) Construction properties for a VpcEndpointService.
VpcEndpointType	The type of VPC endpoint.
VpcLookupOptions	Properties for looking up an existing VPC.
VpcProps	Configuration for Vpc.
VpnConnection	Define a VPN Connection.
VpnConnectionOptions
VpnConnectionProps
VpnConnectionType	The VPN connection type.
VpnGateway	The VPN Gateway that shall be added to the VPC.
VpnGatewayProps	The VpnGateway Properties.
VpnTunnelOption
WindowsImage	Select the latest version of the indicated Windows version.
WindowsImageProps	Configuration options for WindowsImage.
WindowsVersion	The Windows version to use for the WindowsImage.

Interfaces

CfnCapacityReservation.ITagSpecificationProperty
CfnCarrierGateway.ITagsProperty
CfnClientVpnEndpoint.ICertificateAuthenticationRequestProperty
CfnClientVpnEndpoint.IClientAuthenticationRequestProperty
CfnClientVpnEndpoint.IClientConnectOptionsProperty
CfnClientVpnEndpoint.IConnectionLogOptionsProperty
CfnClientVpnEndpoint.IDirectoryServiceAuthenticationRequestProperty
CfnClientVpnEndpoint.IFederatedAuthenticationRequestProperty
CfnClientVpnEndpoint.ITagSpecificationProperty
CfnEC2Fleet.ICapacityReservationOptionsRequestProperty
CfnEC2Fleet.IFleetLaunchTemplateConfigRequestProperty
CfnEC2Fleet.IFleetLaunchTemplateOverridesRequestProperty
CfnEC2Fleet.IFleetLaunchTemplateSpecificationRequestProperty
CfnEC2Fleet.IOnDemandOptionsRequestProperty
CfnEC2Fleet.IPlacementProperty
CfnEC2Fleet.ISpotOptionsRequestProperty
CfnEC2Fleet.ITagSpecificationProperty
CfnEC2Fleet.ITargetCapacitySpecificationRequestProperty
CfnInstance.IAssociationParameterProperty
CfnInstance.IBlockDeviceMappingProperty
CfnInstance.ICpuOptionsProperty
CfnInstance.ICreditSpecificationProperty
CfnInstance.IEbsProperty
CfnInstance.IElasticGpuSpecificationProperty
CfnInstance.IElasticInferenceAcceleratorProperty
CfnInstance.IHibernationOptionsProperty
CfnInstance.IInstanceIpv6AddressProperty
CfnInstance.ILaunchTemplateSpecificationProperty
CfnInstance.ILicenseSpecificationProperty
CfnInstance.INetworkInterfaceProperty
CfnInstance.INoDeviceProperty
CfnInstance.IPrivateIpAddressSpecificationProperty
CfnInstance.ISsmAssociationProperty
CfnInstance.IVolumeProperty
CfnLaunchTemplate.IBlockDeviceMappingProperty
CfnLaunchTemplate.ICapacityReservationSpecificationProperty
CfnLaunchTemplate.ICapacityReservationTargetProperty
CfnLaunchTemplate.ICpuOptionsProperty
CfnLaunchTemplate.ICreditSpecificationProperty
CfnLaunchTemplate.IEbsProperty
CfnLaunchTemplate.IElasticGpuSpecificationProperty
CfnLaunchTemplate.IHibernationOptionsProperty
CfnLaunchTemplate.IIamInstanceProfileProperty
CfnLaunchTemplate.IInstanceMarketOptionsProperty
CfnLaunchTemplate.IIpv6AddProperty
CfnLaunchTemplate.ILaunchTemplateDataProperty
CfnLaunchTemplate.ILaunchTemplateElasticInferenceAcceleratorProperty
CfnLaunchTemplate.ILicenseSpecificationProperty
CfnLaunchTemplate.IMetadataOptionsProperty
CfnLaunchTemplate.IMonitoringProperty
CfnLaunchTemplate.INetworkInterfaceProperty
CfnLaunchTemplate.IPlacementProperty
CfnLaunchTemplate.IPrivateIpAddProperty
CfnLaunchTemplate.ISpotOptionsProperty
CfnLaunchTemplate.ITagSpecificationProperty
CfnLocalGatewayRouteTableVPCAssociation.ITagsProperty
CfnNetworkAclEntry.IIcmpProperty
CfnNetworkAclEntry.IPortRangeProperty
CfnNetworkInterface.IInstanceIpv6AddressProperty
CfnNetworkInterface.IPrivateIpAddressSpecificationProperty
CfnPrefixList.IEntryProperty
CfnSecurityGroup.IEgressProperty
CfnSecurityGroup.IIngressProperty
CfnSpotFleet.IBlockDeviceMappingProperty
CfnSpotFleet.IClassicLoadBalancerProperty
CfnSpotFleet.IClassicLoadBalancersConfigProperty
CfnSpotFleet.IEbsBlockDeviceProperty
CfnSpotFleet.IFleetLaunchTemplateSpecificationProperty
CfnSpotFleet.IGroupIdentifierProperty
CfnSpotFleet.IIamInstanceProfileSpecificationProperty
CfnSpotFleet.IInstanceIpv6AddressProperty
CfnSpotFleet.IInstanceNetworkInterfaceSpecificationProperty
CfnSpotFleet.ILaunchTemplateConfigProperty
CfnSpotFleet.ILaunchTemplateOverridesProperty
CfnSpotFleet.ILoadBalancersConfigProperty
CfnSpotFleet.IPrivateIpAddressSpecificationProperty
CfnSpotFleet.ISpotFleetLaunchSpecificationProperty
CfnSpotFleet.ISpotFleetMonitoringProperty
CfnSpotFleet.ISpotFleetRequestConfigDataProperty
CfnSpotFleet.ISpotFleetTagSpecificationProperty
CfnSpotFleet.ISpotPlacementProperty
CfnSpotFleet.ITargetGroupProperty
CfnSpotFleet.ITargetGroupsConfigProperty
CfnTrafficMirrorFilterRule.ITrafficMirrorPortRangeProperty
CfnVPNConnection.IVpnTunnelOptionsSpecificationProperty
IAclCidrConfig	(experimental) Acl Configuration for CIDR.
IAclIcmp	(experimental) Properties to create Icmp.
IAclPortRange	(experimental) Properties to create PortRange.
IAclTrafficConfig	(experimental) Acl Configuration for traffic.
IAddRouteOptions	Options for adding a new route to a subnet.
IAmazonLinuxImageProps	Amazon Linux image properties.
IApplyCloudFormationInitOptions	Options for applying CloudFormation init to an instance or instance group.
IAttachInitOptions	Options for attaching a CloudFormationInit to a resource.
IBastionHostLinuxProps	(experimental) Properties of the bastion host.
IBlockDevice	Block device.
ICfnCapacityReservationProps	Properties for defining a `AWS::EC2::CapacityReservation`.
ICfnCarrierGatewayProps	Properties for defining a `AWS::EC2::CarrierGateway`.
ICfnClientVpnAuthorizationRuleProps	Properties for defining a `AWS::EC2::ClientVpnAuthorizationRule`.
ICfnClientVpnEndpointProps	Properties for defining a `AWS::EC2::ClientVpnEndpoint`.
ICfnClientVpnRouteProps	Properties for defining a `AWS::EC2::ClientVpnRoute`.
ICfnClientVpnTargetNetworkAssociationProps	Properties for defining a `AWS::EC2::ClientVpnTargetNetworkAssociation`.
ICfnCustomerGatewayProps	Properties for defining a `AWS::EC2::CustomerGateway`.
ICfnDHCPOptionsProps	Properties for defining a `AWS::EC2::DHCPOptions`.
ICfnEC2FleetProps	Properties for defining a `AWS::EC2::EC2Fleet`.
ICfnEgressOnlyInternetGatewayProps	Properties for defining a `AWS::EC2::EgressOnlyInternetGateway`.
ICfnEIPAssociationProps	Properties for defining a `AWS::EC2::EIPAssociation`.
ICfnEIPProps	Properties for defining a `AWS::EC2::EIP`.
ICfnFlowLogProps	Properties for defining a `AWS::EC2::FlowLog`.
ICfnGatewayRouteTableAssociationProps	Properties for defining a `AWS::EC2::GatewayRouteTableAssociation`.
ICfnHostProps	Properties for defining a `AWS::EC2::Host`.
ICfnInstanceProps	Properties for defining a `AWS::EC2::Instance`.
ICfnInternetGatewayProps	Properties for defining a `AWS::EC2::InternetGateway`.
ICfnLaunchTemplateProps	Properties for defining a `AWS::EC2::LaunchTemplate`.
ICfnLocalGatewayRouteProps	Properties for defining a `AWS::EC2::LocalGatewayRoute`.
ICfnLocalGatewayRouteTableVPCAssociationProps	Properties for defining a `AWS::EC2::LocalGatewayRouteTableVPCAssociation`.
ICfnNatGatewayProps	Properties for defining a `AWS::EC2::NatGateway`.
ICfnNetworkAclEntryProps	Properties for defining a `AWS::EC2::NetworkAclEntry`.
ICfnNetworkAclProps	Properties for defining a `AWS::EC2::NetworkAcl`.
ICfnNetworkInterfaceAttachmentProps	Properties for defining a `AWS::EC2::NetworkInterfaceAttachment`.
ICfnNetworkInterfacePermissionProps	Properties for defining a `AWS::EC2::NetworkInterfacePermission`.
ICfnNetworkInterfaceProps	Properties for defining a `AWS::EC2::NetworkInterface`.
ICfnPlacementGroupProps	Properties for defining a `AWS::EC2::PlacementGroup`.
ICfnPrefixListProps	Properties for defining a `AWS::EC2::PrefixList`.
ICfnRouteProps	Properties for defining a `AWS::EC2::Route`.
ICfnRouteTableProps	Properties for defining a `AWS::EC2::RouteTable`.
ICfnSecurityGroupEgressProps	Properties for defining a `AWS::EC2::SecurityGroupEgress`.
ICfnSecurityGroupIngressProps	Properties for defining a `AWS::EC2::SecurityGroupIngress`.
ICfnSecurityGroupProps	Properties for defining a `AWS::EC2::SecurityGroup`.
ICfnSpotFleetProps	Properties for defining a `AWS::EC2::SpotFleet`.
ICfnSubnetCidrBlockProps	Properties for defining a `AWS::EC2::SubnetCidrBlock`.
ICfnSubnetNetworkAclAssociationProps	Properties for defining a `AWS::EC2::SubnetNetworkAclAssociation`.
ICfnSubnetProps	Properties for defining a `AWS::EC2::Subnet`.
ICfnSubnetRouteTableAssociationProps	Properties for defining a `AWS::EC2::SubnetRouteTableAssociation`.
ICfnTrafficMirrorFilterProps	Properties for defining a `AWS::EC2::TrafficMirrorFilter`.
ICfnTrafficMirrorFilterRuleProps	Properties for defining a `AWS::EC2::TrafficMirrorFilterRule`.
ICfnTrafficMirrorSessionProps	Properties for defining a `AWS::EC2::TrafficMirrorSession`.
ICfnTrafficMirrorTargetProps	Properties for defining a `AWS::EC2::TrafficMirrorTarget`.
ICfnTransitGatewayAttachmentProps	Properties for defining a `AWS::EC2::TransitGatewayAttachment`.
ICfnTransitGatewayProps	Properties for defining a `AWS::EC2::TransitGateway`.
ICfnTransitGatewayRouteProps	Properties for defining a `AWS::EC2::TransitGatewayRoute`.
ICfnTransitGatewayRouteTableAssociationProps	Properties for defining a `AWS::EC2::TransitGatewayRouteTableAssociation`.
ICfnTransitGatewayRouteTablePropagationProps	Properties for defining a `AWS::EC2::TransitGatewayRouteTablePropagation`.
ICfnTransitGatewayRouteTableProps	Properties for defining a `AWS::EC2::TransitGatewayRouteTable`.
ICfnVolumeAttachmentProps	Properties for defining a `AWS::EC2::VolumeAttachment`.
ICfnVolumeProps	Properties for defining a `AWS::EC2::Volume`.
ICfnVPCCidrBlockProps	Properties for defining a `AWS::EC2::VPCCidrBlock`.
ICfnVPCDHCPOptionsAssociationProps	Properties for defining a `AWS::EC2::VPCDHCPOptionsAssociation`.
ICfnVPCEndpointConnectionNotificationProps	Properties for defining a `AWS::EC2::VPCEndpointConnectionNotification`.
ICfnVPCEndpointProps	Properties for defining a `AWS::EC2::VPCEndpoint`.
ICfnVPCEndpointServicePermissionsProps	Properties for defining a `AWS::EC2::VPCEndpointServicePermissions`.
ICfnVPCEndpointServiceProps	Properties for defining a `AWS::EC2::VPCEndpointService`.
ICfnVPCGatewayAttachmentProps	Properties for defining a `AWS::EC2::VPCGatewayAttachment`.
ICfnVPCPeeringConnectionProps	Properties for defining a `AWS::EC2::VPCPeeringConnection`.
ICfnVPCProps	Properties for defining a `AWS::EC2::VPC`.
ICfnVPNConnectionProps	Properties for defining a `AWS::EC2::VPNConnection`.
ICfnVPNConnectionRouteProps	Properties for defining a `AWS::EC2::VPNConnectionRoute`.
ICfnVPNGatewayProps	Properties for defining a `AWS::EC2::VPNGateway`.
ICfnVPNGatewayRoutePropagationProps	Properties for defining a `AWS::EC2::VPNGatewayRoutePropagation`.
ICommonNetworkAclEntryOptions	(experimental) Basic NetworkACL entry props.
IConfigSetProps	Options for CloudFormationInit.withConfigSets.
IConfigureNatOptions	(experimental) Options passed by the VPC when NAT needs to be configured.
IConnectable	An object that has a Connections object.
IConnectionRule
IConnectionsProps	Properties to intialize a new Connections object.
IEbsDeviceOptions	Block device options for an EBS volume.
IEbsDeviceOptionsBase	Base block device options for an EBS volume.
IEbsDeviceProps	Properties of an EBS block device.
IEbsDeviceSnapshotOptions	Block device options for an EBS volume created from a snapshot.
IEnableVpnGatewayOptions	Options for the Vpc.enableVpnGateway() method.
IExecuteFileOptions	Options when executing a file.
IFlowLog	(experimental) A FlowLog.
IFlowLogDestinationConfig	(experimental) Flow Log Destination configuration.
IFlowLogOptions	(experimental) Options to add a flow log to a VPC.
IFlowLogProps	(experimental) Properties of a VPC Flow Log.
IGatewayConfig	Pair represents a gateway created by NAT Provider.
IGatewayVpcEndpoint	A gateway VPC endpoint.
IGatewayVpcEndpointOptions	Options to add a gateway endpoint to a VPC.
IGatewayVpcEndpointProps	Construction properties for a GatewayVpcEndpoint.
IGatewayVpcEndpointService	A service for a gateway VPC endpoint.
IGenericLinuxImageProps	Configuration options for GenericLinuxImage.
IGenericWindowsImageProps	Configuration options for GenericWindowsImage.
IInitCommandOptions	Options for InitCommand.
IInitFileAssetOptions	Additional options for creating an InitFile from an asset.
IInitFileOptions	Options for InitFile.
IInitServiceOptions	Options for an InitService.
IInitSourceAssetOptions	Additional options for an InitSource that builds an asset from local files.
IInitSourceOptions	Additional options for an InitSource.
IInitUserOptions	Optional parameters used when creating a user.
IInstance
IInstanceProps	Properties of an EC2 Instance.
IInterfaceVpcEndpoint	An interface VPC endpoint.
IInterfaceVpcEndpointAttributes	Construction properties for an ImportedInterfaceVpcEndpoint.
IInterfaceVpcEndpointOptions	Options to add an interface endpoint to a VPC.
IInterfaceVpcEndpointProps	Construction properties for an InterfaceVpcEndpoint.
IInterfaceVpcEndpointService	A service for an interface VPC endpoint.
ILinuxUserDataOptions	Options when constructing UserData for Linux.
ILocationPackageOptions	Options for InitPackage.rpm/InitPackage.msi.
ILookupMachineImageProps	Properties for looking up an image.
IMachineImage	Interface for classes that can select an appropriate machine image to use.
IMachineImageConfig	Configuration for a machine image.
INamedPackageOptions	Options for InitPackage.yum/apt/rubyGem/python.
INatInstanceProps	(experimental) Properties for a NAT instance.
INetworkAcl	(experimental) A NetworkAcl.
INetworkAclEntry	(experimental) A NetworkAclEntry.
INetworkAclEntryProps	(experimental) Properties to create NetworkAclEntry.
INetworkAclProps	(experimental) Properties to create NetworkAcl.
IPeer	Interface for classes that provide the peer-specification parts of a security group rule.
IPortProps	Properties to create a port range.
IPrivateSubnet
IPrivateSubnetAttributes
IPrivateSubnetProps
IPublicSubnet
IPublicSubnetAttributes
IPublicSubnetProps
IRouteTable	An abstract route table.
IS3DownloadOptions	Options when downloading files from S3.
ISecurityGroup	Interface for security group-like objects.
ISecurityGroupImportOptions	Additional options for imported security groups.
ISecurityGroupProps
ISelectedSubnets	Result of selecting a subset of subnets from a VPC.
ISubnet
ISubnetAttributes
ISubnetConfiguration	Specify configuration parameters for a single subnet group in a VPC.
ISubnetNetworkAclAssociation	(experimental) A SubnetNetworkAclAssociation.
ISubnetNetworkAclAssociationProps	(experimental) Properties to create a SubnetNetworkAclAssociation.
ISubnetProps	Specify configuration parameters for a VPC subnet.
ISubnetSelection	Customize subnets that are selected for placement of ENIs.
IVolume	An EBS Volume in AWS EC2.
IVolumeAttributes	Attributes required to import an existing EBS Volume into the Stack.
IVolumeProps	Properties of an EBS Volume.
IVpc
IVpcAttributes	Properties that reference an external Vpc.
IVpcEndpoint	A VPC endpoint.
IVpcEndpointService	(experimental) A VPC endpoint service.
IVpcEndpointServiceLoadBalancer	A load balancer that can host a VPC Endpoint Service.
IVpcEndpointServiceProps	(experimental) Construction properties for a VpcEndpointService.
IVpcLookupOptions	Properties for looking up an existing VPC.
IVpcProps	Configuration for Vpc.
IVpnConnection
IVpnConnectionOptions
IVpnConnectionProps
IVpnGateway	The virtual private gateway interface.
IVpnGatewayProps	The VpnGateway Properties.
IVpnTunnelOption
IWindowsImageProps	Configuration options for WindowsImage.