STIGUI
V-256482CAT II — Medium severitySV-256482r958402_rule

The Photon operating system must set a session inactivity timeout of 15 minutes or less.

Rule version PHTN-30-000005 · STIG v1 · 2026-08-31

Discussion

A session timeout is an action taken when a session goes idle for any reason. Rather than relying on the user to manually disconnect their session prior to going idle, the Photon operating system must be able to identify when a session has idled and take action to terminate the session.

Satisfies: SRG-OS-000029-GPOS-00010, SRG-OS-000279-GPOS-00109, SRG-OS-000126-GPOS-00066

Check

At the command line, run the following command:

# cat /etc/profile.d/tmout.sh

Expected result:

TMOUT=900 readonly TMOUT export TMOUT mesg n 2>/dev/null

If the file "tmout.sh" does not exist or the output does not look like the expected result, this is a finding.

Fix

Navigate to and open:

/etc/profile.d/tmout.sh

Set its content to the following:

TMOUT=900 readonly TMOUT export TMOUT mesg n 2>/dev/null

Identifiers

Group ID
V-256482
Group title
SRG-OS-000029-GPOS-00010
Rule ID
SV-256482r958402_rule
Check ID
C-60157r887118_chk
Fix ID
F-60100r887119_fix