Ensure sshd ClientAliveInterval and ClientAliveCountMax are configured

보통레벨 1자동aix

설명

Note: To clarify, the two settings described below are only meant for idle connections from a protocol perspective and are not meant to check if the user is active or not. An idle user does not mean an idle connection. SSH does not and never had, intentionally, the capability to drop idle users. In order to prevent resource exhaustion, appropriate values should be set for both ClientAliveInterval and ClientAliveCountMax. Audit: evaluates the effective configuration from `sshd -T` (Match blocks must be reviewed separately).

점검 방법

감사 방식: 셸 명령

shell

command -v sshd >/dev/null 2>&1 || exit 1; out=$(sshd -T 2>/dev/null) || exit 1; r=compliant; for p in '^clientaliveinterval[[:blank:]]+[1-9][0-9]*$' '^clientalivecountmax[[:blank:]]+[1-9][0-9]*$'; do printf '%s\n' "$out" | grep -Eiq -- "$p" || r="not matched: $p"; done; echo "$r"

예상 출력: compliant

조치 방법

조치 방식: 가이드 또는 인프라 패치

Edit the /etc/ssh/sshd_config file to set the ClientAliveInterval and ClientAliveCountMax parameters above any Include and Match entries according to site policy. Example: ClientAliveInterval 15 ClientAliveCountMax 3 Note: First occurrence of a option takes precedence, Match set statements withstanding. If Include locations are enabled, used, and order of precedence is understood in your environment, the entry may be created in a file in Include location.

속성

운영 체제: 모두
태그: aixssh
참고 자료: CIS IBM AIX 7 Benchmark v1.2.0 - 4.6.3.18 Ensure sshd ClientAliveInterval and ClientAliveCountMax are configured

이 호스트 점검하기

감사 권한이 있는 시스템에서 실행하세요. 스캔은 읽기 전용입니다.

shell

tmaegis scan --target aix