- 필수 기능
- 시작하기
- Glossary
- 표준 속성
- Guides
- Agent
- 통합
- 개방형텔레메트리
- 개발자
- API
- Datadog Mobile App
- CoScreen
- Cloudcraft
- 앱 내
- 서비스 관리
- 인프라스트럭처
- 애플리케이션 성능
- APM
- Continuous Profiler
- 스팬 시각화
- 데이터 스트림 모니터링
- 데이터 작업 모니터링
- 디지털 경험
- 소프트웨어 제공
- 보안
- AI Observability
- 로그 관리
- 관리
Reduce the possibility of a breach by checking EC2 security groups for inbound rules that allow unfettered access to TCP and UDP port 53, commonly used during DNS resolution when a request is sent from DNS clients to DNS servers or between DNS servers.
Malicious activity, such as distributed denial-of-service (DDoS) attacks, can occur when permitting unfettered DNS access.
Follow the Security group rules docs to learn how to add a security group rule that will restrict access to a specific port.
Run describe-security-groups
with a filter to expose security groups that allow access to port 53.
describe-security-groups.sh
aws ec2 revoke-security-group-egress
--group-id your-group-id
--ip-permissions '[{"IpProtocol": "tcp", "FromPort": 53, "ToPort": 53, "IpRanges": [{"CidrIp": "192.0.2.0/24"}]}]'