The operating system must terminate the network connection associated with a communications session at the end of the session or after 10 minutes of inactivity.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| low | V-216356 | SRG-OS-000163 | SOL-11.1-040380 | SV-216356r970703_rule | 2024-11-25 | 3 |
| Description |
|---|
| This requirement applies to both internal and external networks. Terminating network connections associated with communications sessions means de-allocating associated TCP/IP address/port pairs at the operating system level. The time period of inactivity may, as the organization deems necessary, be a set of time periods by type of network access or for specific accesses. |
| ℹ️ Check |
|---|
| Determine if SSH is configured to disconnect sessions after 10 minutes of inactivity. # grep ClientAlive /etc/ssh/sshd_config If the output of this command is not: ClientAliveInterval 600 ClientAliveCountMax 0 this is a finding. |
| ✔️ Fix |
|---|
| The root role is required. Configure the system to disconnect SSH sessions after 10 minutes of inactivity. Modify the sshd_config file: # pfedit /etc/ssh/sshd_config Modify or add the lines containing: ClientAliveInterval ClientAliveCountMax Change them to: ClientAliveInterval 600 ClientAliveCountMax 0 Restart the SSH service: # svcadm restart svc:/network/ssh |