- 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 probability of a breach by checking EC2 security groups for inbound rules that allow unfettered access to TCP port 139 and UDP ports 137 and 138 (used by services for NetBIOS name resolution) and restrict access to IP addresses that require this port.
Malicious activity, such as bad tunnel exploits or denial-of-service (DoS) and man-in-the-middle (MITM) attacks, can occur when permitting unfettered access to this port.
Follow the Security group rules docs to learn how to add a security group rule that will restrict access to a specific port.
Run authorize-security-group-ingress
to add new inbound rules that restrict UDP ports 137 access.
revoke-security-group-ingress.sh
aws ec2 authorize-security-group-ingress
--group-name your-group-name
--protocol udp
--port 137
--cidr 192.0.2.0/24
Run authorize-security-group-ingress
to add new inbound rules that restrict UDP ports 138 access.
revoke-security-group-ingress.sh
aws ec2 authorize-security-group-ingress
--group-name your-group-name
--protocol udp
--port 138
--cidr 192.0.2.0/24