Ensure mail transfer agent is configured for local-only mode

中レベル 1自動ros

説明

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.

チェック方法

監査方法: シェルコマンド

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)"

期待される出力: compliant

修正方法

修正方法: ガイダンスまたは IaC パッチ

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

プロパティ

オペレーティングシステム: すべて
タグ: rosros1melodicservices
参照: CIS ROS Melodic Benchmark v1.0.0 - 2.2.15 Ensure mail transfer agent is configured for local-only mode

このホストをチェック

監査が許可されているマシンで実行してください。スキャンは読み取り専用です。

shell

tmaegis scan --target ros