The Photon operating system must configure sshd to disconnect idle Secure Shell (SSH) sessions.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-256514 | SRG-OS-000163-GPOS-00072 | PHTN-30-000038 | SV-256514r970703_rule | 2024-12-16 | 1 |
| Description |
|---|
| Terminating an idle session within a short time period reduces the window of opportunity for unauthorized personnel to take control of a management session enabled on a console or console port that has been left unattended. |
| ℹ️ Check |
|---|
| At the command line, run the following command: # sshd -T|&grep -i ClientAliveCountMax Expected result: ClientAliveCountMax 0 If the output does not match the expected result, this is a finding. |
| ✔️ Fix |
|---|
| Navigate to and open: /etc/ssh/sshd_config Ensure the "ClientAliveCountMax" line is uncommented and set to the following: ClientAliveCountMax 0 At the command line, run the following command: # systemctl restart sshd.service |