Ensure mail transfer agent is configured for local-only mode

보통레벨 1자동ros

설명

Mail Transfer Agents (MTA), such as sendmail and Postfix, are used to listen for incoming mail and transfer the messages to the appropriate user or mail server. If the system is not intended to be a mail server, it is recommended that the MTA be configured to only process local mail. The audit requires nothing to listen on port 25 except 127.0.0.1 and ::1 (ss). Host-level control from the CIS ROS Melodic benchmark (Ubuntu 18.04 robot hosts); run as root.

점검 방법

감사 방식: 셸 명령

shell

command -v ss >/dev/null 2>&1 || exit 1
l=$(ss -Hlntu 2>/dev/null | awk '$5 ~ /:25$/ {print $5}' | grep -Ev '^(127\.0\.0\.1|\[::1\]|::1):25$')
[ -z "$l" ] && echo compliant || echo "MTA listening on: $(printf '%s ' $l)"

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

Edit /etc/postfix/main.cf and add the following line to the RECEIVING MAIL section. If the line already exists, change it to look like the line below: inet_interfaces = loopback-only Restart postfix: # systemctl restart postfix

속성

운영 체제: 모두
태그: rosros1melodicservices
참고 자료: CIS ROS Melodic Benchmark v1.0.0 - 2.2.15 Ensure mail transfer agent is configured for local-only mode

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shell

tmaegis scan --target ros