Step 2: Create and apply an AWS WAF policy - AWS WAF, AWS Firewall Manager, and AWS Shield Advanced

Step 2: Create and apply an AWS WAF policy

A Firewall Manager AWS WAF policy contains the rule groups that you want to apply to your resources. Firewall Manager creates a Firewall Manager web ACL in each account where you apply the policy. The individual account managers can add rules and rule groups to the resulting web ACL, in addition to the rule groups that you define here. For information about Firewall Manager AWS WAF policies, see AWS WAF policies.

To create a Firewall Manager AWS WAF policy (console)

  1. Sign in to the AWS Management Console using your Firewall Manager administrator account, and then open the Firewall Manager console at https://console.aws.amazon.com/wafv2/fmsv2.

    Note

    For information about setting up a Firewall Manager administrator account, see AWS Firewall Manager prerequisites.

  2. In the navigation pane, choose Security policies.

  3. Choose Create policy.

  4. For Policy type, choose AWS WAF.

  5. For Region, choose an AWS Region. To protect Amazon CloudFront distributions, choose Global.

    To protect resources in multiple Regions (other than CloudFront distributions), you must create separate Firewall Manager policies for each Region.

  6. Choose Next.

  7. For Policy name, enter a descriptive name. Firewall Manager includes the policy name in the names of the web ACLs that it manages. The web ACL names have FMManagedWebACLV2- followed by the policy name that you enter here, -, and the web ACL creation timestamp, in UTC milliseconds. For example, FMManagedWebACLV2-MyWAFPolicyName-1621880374078.

  8. Under Policy rules, for First rule groups, choose Add rule groups. Expand the AWS managed rule groups. For Core rule set, toggle Add to web ACL. For AWS known bad inputs, toggle Add to web ACL. Choose Add rules.

    For Last rule groups, choose Add rule groups. Expand the AWS managed rule groups and for the Amazon IP reputation list, toggle Add to web ACL. Choose Add rules.

    Under First rule groups, select Core rule set and choose Move down. AWS WAF evaluates web requests against the AWS known bad inputs rule group before it evaluates against the Core rule set.

    Note

    You can also create your own AWS WAF rule groups if you want, using the AWS WAF console. Any rule groups that you create show up under Your rule groups in the Describe policy : Add rule groups page.

    The first and last AWS WAF rule groups that you manage through Firewall Manager have names that begin with PREFMManaged- or POSTFMManaged-, respectively, followed by the Firewall Manager policy name, and the rule group creation timestamp, in UTC milliseconds. For example, PREFMManaged-MyWAFPolicyName-1621880555123.

  9. Leave the default action for the web ACL at Allow.

  10. Leave the Policy action at the default, to not automatically remediate noncompliant resources. You can change the option later.

  11. Choose Next.

  12. For Policy scope, you provide the settings for the accounts, resource types, and tagging that identify the resources you want to apply the policy to. For this tutorial, leave the AWS accounts and Resources settings, and choose one or more resource types.

  13. Choose Next.

  14. For Policy tags, you can add any identifying tags that you want for the Firewall Manager AWS WAF policy. For more information about tags, see Working with Tag Editor. For this tutorial, you can leave this alone.

  15. Choose Next.

  16. Review the new policy. You can make changes by choosing Edit in the area that you want to change. This returns you to the corresponding step in the creation wizard. When you are satisfied with the policy, choose Create policy.