AWS SDK Version 3 for .NET
API Reference

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Creates a security group.

A security group is for use with instances either in the EC2-Classic platform or in a specific VPC. For more information, see Amazon EC2 Security Groups in the Amazon Elastic Compute Cloud User Guide and Security Groups for Your VPC in the Amazon Virtual Private Cloud User Guide.

EC2-Classic: You can have up to 500 security groups.

EC2-VPC: You can create up to 500 security groups per VPC.

When you create a security group, you specify a friendly name of your choice. You can have a security group for use in EC2-Classic with the same name as a security group for use in a VPC. However, you can't have two security groups for use in EC2-Classic with the same name or two security groups for use in a VPC with the same name.

You have a default security group for use in EC2-Classic and a default security group for use in your VPC. If you don't specify a security group when you launch an instance, the instance is launched into the appropriate default security group. A default security group includes a default rule that grants instances unrestricted network access to each other.

You can add or remove rules from your security groups using AuthorizeSecurityGroupIngress, AuthorizeSecurityGroupEgress, RevokeSecurityGroupIngress, and RevokeSecurityGroupEgress.


For .NET Core and PCL this operation is only available in asynchronous form. Please refer to CreateSecurityGroupAsync.

Namespace: Amazon.EC2
Assembly: AWSSDK.EC2.dll
Version: 3.x.y.z


public abstract CreateSecurityGroupResponse CreateSecurityGroup(
         CreateSecurityGroupRequest request
Type: Amazon.EC2.Model.CreateSecurityGroupRequest

Container for the necessary parameters to execute the CreateSecurityGroup service method.

Return Value
The response from the CreateSecurityGroup service method, as returned by EC2.


This example creates a security group for the specified VPC.

To create a security group for a VPC

var response = client.CreateSecurityGroup(new CreateSecurityGroupRequest 
    Description = "My security group",
    GroupName = "my-security-group",
    VpcId = "vpc-1a2b3c4d"

string groupId = response.GroupId;


Version Information

.NET Framework:
Supported in: 4.5, 4.0, 3.5

Portable Class Library:
Supported in: Windows Store Apps
Supported in: Windows Phone 8.1
Supported in: Xamarin Android
Supported in: Xamarin iOS (Unified)
Supported in: Xamarin.Forms

See Also