Ensure sshd ClientAliveInterval and ClientAliveCountMax are configured

SedangLevel 1Otomatisaix

Deskripsi

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).

Cara pemeriksaan

Metode audit: Perintah shell

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"

Output yang diharapkan: compliant

Cara perbaikan

Metode perbaikan: Panduan atau patch infrastruktur

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.

Properti

Sistem operasi: Apa saja
Tag: aixssh
Referensi: CIS IBM AIX 7 Benchmark v1.2.0 - 4.6.3.18 Ensure sshd ClientAliveInterval and ClientAliveCountMax are configured

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shell

tmaegis scan --target aix