mirror of
https://github.com/Sea-Haven-Industries/seahaven-org-baseline.git
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60e8b0e9ed
seahaven-app-waf (CLOUDFRONT scope, us-east-1): AWS managed Common + Known Bad Inputs rule groups + per-IP rate limit (2000/5min). ARN published to SSM /seahaven/waf/app-web-acl-arn for app stacks (meal-order/orders) to consume. seahaven.com already has its own WAF; ledgerflow is being decommissioned (INFRA-26); proposal-system-web skipped (not live).
76 lines
2.4 KiB
TypeScript
76 lines
2.4 KiB
TypeScript
import * as cdk from "aws-cdk-lib";
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import * as wafv2 from "aws-cdk-lib/aws-wafv2";
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import * as ssm from "aws-cdk-lib/aws-ssm";
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import { Construct } from "constructs";
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/**
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* Shared CloudFront WAF WebACL for Sea Haven app distributions (audit M-17).
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*
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* AWS managed rule groups (Common + Known Bad Inputs) plus an IP rate limit.
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* CLOUDFRONT-scope WebACLs must live in us-east-1 — which is where this stack
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* is — so it can be referenced by any app CloudFront distribution by ARN.
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*
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* The ARN is published to SSM (`/seahaven/waf/app-web-acl-arn`) so app stacks in
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* other repos can consume it via `{{resolve:ssm:...}}` without a hard CFN export.
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*/
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export class AppWebAcl extends Construct {
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constructor(scope: Construct, id: string) {
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super(scope, id);
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const vis = (metric: string): wafv2.CfnWebACL.VisibilityConfigProperty => ({
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cloudWatchMetricsEnabled: true,
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sampledRequestsEnabled: true,
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metricName: metric,
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});
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const webAcl = new wafv2.CfnWebACL(this, "AppWebAcl", {
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name: "seahaven-app-waf",
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scope: "CLOUDFRONT",
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defaultAction: { allow: {} },
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visibilityConfig: vis("seahaven-app-waf"),
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rules: [
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{
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name: "AWSCommonRuleSet",
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priority: 1,
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overrideAction: { none: {} },
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statement: {
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managedRuleGroupStatement: {
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vendorName: "AWS",
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name: "AWSManagedRulesCommonRuleSet",
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},
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},
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visibilityConfig: vis("AWSCommonRuleSet"),
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},
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{
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name: "AWSKnownBadInputs",
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priority: 2,
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overrideAction: { none: {} },
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statement: {
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managedRuleGroupStatement: {
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vendorName: "AWS",
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name: "AWSManagedRulesKnownBadInputsRuleSet",
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},
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},
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visibilityConfig: vis("AWSKnownBadInputs"),
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},
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{
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name: "RateLimitPerIp",
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priority: 3,
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action: { block: {} },
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statement: {
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rateBasedStatement: { limit: 2000, aggregateKeyType: "IP" },
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},
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visibilityConfig: vis("RateLimitPerIp"),
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},
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],
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});
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new ssm.StringParameter(this, "AppWebAclArnParam", {
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parameterName: "/seahaven/waf/app-web-acl-arn",
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stringValue: webAcl.attrArn,
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description: "ARN of the shared CloudFront WAF WebACL (audit M-17)",
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});
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new cdk.CfnOutput(this, "AppWebAclArn", { value: webAcl.attrArn });
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}
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}
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