STIGQter: STIG Summary: Microsoft Windows Server 2025 Security Technical Implementation Guide Version: 1 Release: 2 Benchmark Date: 01 Jul 2026:

Windows Server 2025 OpenSSH must be configured so that all network connections associated with SSH traffic terminate after becoming unresponsive.

DISA Rule

SV-285318r1211182_rule

Vulnerability Number

V-285318

Group Title

SRG-OS-000163-GPOS-00072

Rule Version

WN25-SH-000060

Severity

CAT II

CCI(s)

• CCI-001133 - Terminate the network connection associated with a communications session at the end of the session or after an organization-defined time period of inactivity.
• CCI-002361 - Automatically terminate a user session after organization-defined conditions or trigger events requiring session disconnect.

Weight

10

Fix Recommendation

To configure the system, add or modify the following line in the "$env:ProgramData/ssh/sshd_config" file:

ClientAliveCountMax 1

Restart the OpenSSH service for the settings to take effect.

Check Contents

If OpenSSH is not installed on the system, this requirement is not applicable.

Verify the "ClientAliveCountMax" is set to "1" by performing the following command:

C:\ > Get-Content "$env:ProgramData\ssh\sshd_config" | Select-String -Pattern '^\s*ClientAliveCountMax'

ClientAliveCountMax 1

If "ClientAliveCountMax" does not exist, is not set to a value of "1", or is commented out, this is a finding.

Vulnerability Number

V-285318

Documentable

False

Rule Version

WN25-SH-000060

Severity Override Guidance

If OpenSSH is not installed on the system, this requirement is not applicable.

Verify the "ClientAliveCountMax" is set to "1" by performing the following command:

C:\ > Get-Content "$env:ProgramData\ssh\sshd_config" | Select-String -Pattern '^\s*ClientAliveCountMax'

ClientAliveCountMax 1

If "ClientAliveCountMax" does not exist, is not set to a value of "1", or is commented out, this is a finding.

Check Content Reference

M

Target Key

5719