AWS IAM MFA 강제 설정

1. Policies 메뉴 클릭

2. Create policy 버튼 클릭

3. JSON 탭 선택

4. 입력 textarea 에 JSON 입력

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "AllowAllUsersToListAccounts",
            "Effect": "Allow",
            "Action": [
                "iam:ListAccountAliases",
                "iam:ListUsers",
                "iam:GetAccountPasswordPolicy",
                "iam:GetAccountSummary"
            ],
            "Resource": "*"
        },
        {
            "Sid": "AllowIndividualUserToSeeAndManageOnlyTheirOwnAccountInformation",
            "Effect": "Allow",
            "Action": [
                "iam:ChangePassword",
                "iam:CreateAccessKey",
                "iam:CreateLoginProfile",
                "iam:DeleteAccessKey",
                "iam:DeleteLoginProfile",
                "iam:GetLoginProfile",
                "iam:ListAccessKeys",
                "iam:UpdateAccessKey",
                "iam:UpdateLoginProfile",
                "iam:ListSigningCertificates",
                "iam:DeleteSigningCertificate",
                "iam:UpdateSigningCertificate",
                "iam:UploadSigningCertificate",
                "iam:ListSSHPublicKeys",
                "iam:GetSSHPublicKey",
                "iam:DeleteSSHPublicKey",
                "iam:UpdateSSHPublicKey",
                "iam:UploadSSHPublicKey"
            ],
            "Resource": "arn:aws:iam::*:user/${aws:username}"
        },
        {
            "Sid": "AllowIndividualUserToListOnlyTheirOwnMFA",
            "Effect": "Allow",
            "Action": [
                "iam:ListVirtualMFADevices",
                "iam:ListMFADevices"
            ],
            "Resource": [
                "arn:aws:iam::*:mfa/*",
                "arn:aws:iam::*:user/${aws:username}"
            ]
        },
        {
            "Sid": "AllowIndividualUserToManageTheirOwnMFA",
            "Effect": "Allow",
            "Action": [
                "iam:CreateVirtualMFADevice",
                "iam:DeleteVirtualMFADevice",
                "iam:EnableMFADevice",
                "iam:ResyncMFADevice"
            ],
            "Resource": [
                "arn:aws:iam::*:mfa/${aws:username}",
                "arn:aws:iam::*:user/${aws:username}"
            ]
        },
        {
            "Sid": "AllowIndividualUserToDeactivateOnlyTheirOwnMFAOnlyWhenUsingMFA",
            "Effect": "Allow",
            "Action": [
                "iam:DeactivateMFADevice"
            ],
            "Resource": [
                "arn:aws:iam::*:mfa/${aws:username}",
                "arn:aws:iam::*:user/${aws:username}"
            ],
            "Condition": {
                "Bool": {
                    "aws:MultiFactorAuthPresent": "true"
                }
            }
        },
        {
            "Sid": "BlockMostAccessUnlessSignedInWithMFA",
            "Effect": "Deny",
            "NotAction": [
                "iam:CreateVirtualMFADevice",
                "iam:DeleteVirtualMFADevice",
                "iam:ListVirtualMFADevices",
                "iam:EnableMFADevice",
                "iam:ResyncMFADevice",
                "iam:ListAccountAliases",
                "iam:ListUsers",
                "iam:ListSSHPublicKeys",
                "iam:ListAccessKeys",
                "iam:ListServiceSpecificCredentials",
                "iam:ListMFADevices",
                "iam:GetAccountSummary",
                "sts:GetSessionToken"
            ],
            "Resource": "*",
            "Condition": {
                "BoolIfExists": {
                    "aws:MultiFactorAuthPresent": "false"
                }
            }
        }
    ]
}

5. Review policy 버튼 클릭

6. Name : Force_MFA

7. Create policy 버튼 클릭

8. Groups 메뉴 클릭

9. Create New Group 버튼 클릭

10. Group Name: Force_MFA_Group

11. Next Step 버튼 클릭

12. Attach Policy 페이지 목록 헤더의 Filter: 입력란에 MFA 입력

13. 목록에 Force_MFA 나타나면 checkbox 선택

14. Next Step 버튼 클릭

15. Review 페이지에서 Create Group 버튼 클릭

16. Groups 페이지 목록 중 Force_MFA_Group 항목 클릭

17. Summary 페이지에서 Users 탭 선택

18. Add Users to Group 버튼 클릭

19. 그룹에 추가할 유저를 checkbox 선택

20. Add Users 버튼 클릭

21. Force_MFA_Group 에 지정된 유저들은
IAM > Users > 특정 유저의 Summary > Security credentials 탭 > Assigned MFA device : Manage 를
설정 전까지 다른 서비스들이 제한됨.