The ESXi host Secure Shell (SSH) daemon must set a timeout interval on idle sessions.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| low | V-256395 | SRG-OS-000480-VMM-002000 | ESXI-70-000027 | SV-256395r959010_rule | 2025-02-11 | 1 |
Description
Automatically logging out idle users guards against compromises via hijacked administrative sessions.
ℹ️ Check
From an ESXi shell, run the following command:
# /usr/lib/vmware/openssh/bin/sshd -T|grep clientaliveinterval
Expected result:
clientaliveinterval 200
If the output does not match the expected result, this is a finding.
✔️ Fix
From an ESXi shell, add or correct the following line in "/etc/ssh/sshd_config":
ClientAliveInterval 200