{WAF}Getting started with AWS WAF - HTN20190109の日記

https://blog.serverworks.co.jp/2022/02/01/144012

https://docs.aws.amazon.com/waf/latest/developerguide/getting-started.html

-- 1. コマンド等のインストール

-- 1.1 aws cli version 2 インストール

curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
unzip awscliv2.zip
sudo ./aws/install
aws --version

-- 1.2 jqインストール
sudo yum -y install jq

-- 2. S3 バケットを作成する

aws s3 ls

aws s3 mb s3://bucket123

-- 3. インデックスドキュメントの設定

vim index.html

<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>My Website Home Page</title>
</head>
<body>
<h1>Welcome to my website</h1>
<p>Now hosted on Amazon S3!</p>
</body>
</html>

aws s3api put-object --bucket bucket123 --key index.html --body index.html --content-type text/html

-- 4. ディストリビューションの作成

aws cloudfront create-distribution \
--origin-domain-name bucket123.s3.ap-northeast-1.amazonaws.com \
--default-root-object index.html

aws cloudfront list-distributions

aws cloudfront get-distribution \
--id 0000000000000

aws cloudfront get-distribution-config \
--id 0000000000000

-- 5. OAIの作成

aws cloudfront create-cloud-front-origin-access-identity \
--cloud-front-origin-access-identity-config '{
"CallerReference": "caller01",
"Comment": "oai01"
}'

aws cloudfront list-cloud-front-origin-access-identities

aws cloudfront get-cloud-front-origin-access-identity \
--id 11111111111111

-- 6. OAIをディストリビューションに追加する

aws cloudfront get-distribution \
--id 0000000000000

aws cloudfront get-distribution-config \
--id 0000000000000

aws cloudfront get-distribution-config \
--id 0000000000000 | jq -r .DistributionConfig > distribution.json

vim distribution.json

Origins -> Items -> CustomHeaders の下の
CustomOriginConfigを削除して下記S3OriginConfigを追加

"S3OriginConfig": {
"OriginAccessIdentity": "origin-access-identity/cloudfront/11111111111111"
},

aws cloudfront get-distribution-config \
--id 0000000000000 | jq -r .ETag

aws cloudfront update-distribution \
--id 0000000000000 \
--if-match 22222222222222 \
--distribution-config file://distribution.json

-- 7. OAI に Amazon S3 バケット内のファイルの読み込みアクセス許可を付与する

vim b.json

{
"Version": "2012-10-17",
"Id": "PolicyForCloudFrontPrivateContent",
"Statement": [
{
"Effect": "Allow",
"Principal": {
"AWS": "arn:aws:iam::cloudfront:user/CloudFront Origin Access Identity 11111111111111"
},
"Action": [
"s3:GetObject",
"s3:PutObject"
],
"Resource": "arn:aws:s3:::bucket123/*"
}
]
}

aws s3api put-bucket-policy \
--bucket bucket123 \
--policy file://b.json

aws s3api get-bucket-policy \
--bucket bucket123

-- 8. 動作確認(web ACL設定前)

curl -v -X GET http://xxxxxxxxxxxxxx.cloudfront.net/index.html

-- 9. web ACL作成

aws wafv2 create-web-acl \
--name acl01 \
--scope CLOUDFRONT \
--region us-east-1 \
--default-action '{
"Allow": {}
}' \
--rules ' [
{
"Name": "rule01",
"Priority": 0,
"Statement": {
"GeoMatchStatement": {
"CountryCodes": [
"JP"
]
}
},
"Action": {
"Block": {}
},
"VisibilityConfig": {
"SampledRequestsEnabled": true,
"CloudWatchMetricsEnabled": true,
"MetricName": "rule01"
}
}
]' \
--visibility-config '{
"SampledRequestsEnabled": true,
"CloudWatchMetricsEnabled": true,
"MetricName": "acl01"
}'

aws wafv2 list-web-acls \
--scope CLOUDFRONT \
--region us-east-1

aws wafv2 get-web-acl \
--name acl01 \
--scope CLOUDFRONT \
--region us-east-1 \
--id 33333333-3333-3333-3333-333333333333

-- 10. web ACLをディストリビューションへ関連付ける

aws cloudfront get-distribution \
--id 0000000000000

aws cloudfront get-distribution-config \
--id 0000000000000

aws cloudfront get-distribution-config \
--id 0000000000000 | jq -r .DistributionConfig > distribution.json

vim distribution.json

WebACLIdにARNを設定

"WebACLId": "arn:aws:wafv2:us-east-1:999999999999:global/webacl/acl01/44444444-4444-4444-4444-444444444444",

aws cloudfront get-distribution-config \
--id 0000000000000 | jq -r .ETag

aws cloudfront update-distribution \
--id 0000000000000 \
--if-match 5555555555555 \
--distribution-config file://distribution.json

-- 11. 動作確認(web ACL設定後)

curl -v -X GET http://xxxxxxxxxxxxxx.cloudfront.net/index.html

-- 12. クリーンアップ

-- ディストリビューションの無効化

aws cloudfront get-distribution \
--id 0000000000000

aws cloudfront get-distribution-config \
--id 0000000000000

※ distribution.jsonはget-distribution-configコマンドのDistributionConfigから取得し、Enabledをfalseに変更する

aws cloudfront get-distribution-config \
--id 0000000000000 | jq -r .DistributionConfig > distribution.json

sed -i 's/"Enabled": true/"Enabled": false/' distribution.json

aws cloudfront get-distribution-config \
--id 0000000000000 | jq -r .ETag

aws cloudfront update-distribution \
--id 0000000000000 \
--if-match 66666666666666 \
--distribution-config file://distribution.json

※ if-matchにはETagの値をセット

無効化されるまで待つ

-- ディストリビューションの削除

aws cloudfront get-distribution \
--id 0000000000000

aws cloudfront get-distribution-config \
--id 0000000000000

aws cloudfront get-distribution-config \
--id 0000000000000 | jq -r .ETag

aws cloudfront delete-distribution \
--id 0000000000000 \
--if-match 7777777777777

aws cloudfront list-distributions

-- OAIの削除

aws cloudfront list-cloud-front-origin-access-identities

aws cloudfront get-cloud-front-origin-access-identity \
--id 11111111111111

aws cloudfront delete-cloud-front-origin-access-identity \
--id 11111111111111 \
--if-match 88888888888888

-- バケットの削除
aws s3 ls

aws s3 rb s3://bucket123 --force

-- web ACLの削除

aws wafv2 list-web-acls \
--scope CLOUDFRONT \
--region us-east-1

aws wafv2 get-web-acl \
--name acl01 \
--scope CLOUDFRONT \
--region us-east-1 \
--id 33333333-3333-3333-3333-333333333333

aws wafv2 delete-web-acl \
--name acl01 \
--scope CLOUDFRONT \
--region us-east-1 \
--id 33333333-3333-3333-3333-333333333333 \
--lock-token aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa

※lock-tokenはget-web-aclの出力値から取得する