Ensure mail transfer agent is configured for local-only mode

中级别 1自动化ros

说明

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.

检查方式

审计方法: Shell 命令

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)"

预期输出: compliant

修复方式

修复方法: 操作指南或基础设施补丁

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

属性

操作系统: 任意
标签: rosros1melodicservices
参考: CIS ROS Melodic Benchmark v1.0.0 - 2.2.15 Ensure mail transfer agent is configured for local-only mode

检查本机

请在您有权审计的机器上运行此命令。扫描为只读操作。

shell

tmaegis scan --target ros