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    Configurational Walk-through of AWS Firewall Manager

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    • Configurational Walk-through of AWS Firewall Manager

    Configurational Walk-through of AWS Firewall Manager

    • Date April 6, 2018

    Firewall Manager has three prerequisites:

    AWS Organizations – Your organization must be using AWS Organizations to manage your accounts and all features must be enabled. To learn more, read Creating an Organization.

    Firewall Administrator – You must designate one of the AWS accounts in your organization as the administrator for Firewall Manager. This gives the account permission to deploy AWS WAF rules across the organization.

    AWS Config – You must enable AWS Config for all of the accounts in the Organization so that Firewall Manager can detect newly created resources (you can use the Enable AWS Config template on the StackSets Sample Templates page to take care of this).

    Since I don’t own an enterprise, my colleagues were kind enough to create some test accounts for me! When I open the Firewall Manager Console in the master account, I can see where I stand with respect to the first two prerequisites:

    The Learn more about… button reveals the Account ID of the administrator:

    I switch to that account (in a a real-world situation it is unlikely that I would have access to the master account and this one), open the console, and see that I now meet the prerequisites. I click Create policy to move ahead:

    The console outlines the process for me. I need to create rules and a rule group, define a policy with the rule group, define the scope of the policy, and then actually create the policy.

    At the bottom of the page I choose to create a new policy and rule group, for resources in the US East (N. Virginia) Region, and click Next:

    Then I specify the conditions for my rule, choosing from the following options:

    • Cross-site scripting
    • Geographic origin
    • SQL injection
    • IP address or range
    • Size constraint
    • String or regular expression

    For example, I can create a condition that blocks malicious IP addresses (this AWS Solution shows you how to use a third-party reputation list with WAF, and may be helpful):

    I’ll keep this one simple, but a rule can include multiple conditions. After I have added all of them, I click Next to proceed. Now I am ready to create my rule, and I click Create rule (I can add more conditions to it later if I want):

    I give my rule a name (BlockExcludedIPs), enter a CloudWatch metric name, and add my condition (ExcludeIPs), then click Create:

    I can create more rules, and include them in the same rule group. Again, I’ll keep this one simple, and click Next to move ahead:

    I enter a name for my group, choose the rules that will make up the group, and click Create:

    I now have two rule groups (testRuleGroup was already present in the account). I name my policy and click Next to proceed:

    Now I define the scope of my policy. I choose the type of resource to be protected, and indicate when the policy should be applied:

    I can also use tags to include or exclude resources:

    Once I have defined the scope of my policy I click Next and review it, then click Create policy:

    Now that the policy is in force, the ALBs within its scope are initially noncompliant:

    Within minutes, Firewall Manager applies the policy and provides me with a status report:

    Tag:AWS Firewall Manager

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    April 6, 2018

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