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The Photon operating system must enforce a delay of at least four seconds between logon prompts following a failed logon attempt.


Finding ID Version Rule ID IA Controls Severity
V-258869 PHTN-40-000206 SV-258869r933668_rule Medium
Limiting the number of logon attempts over a certain time interval reduces the chances that an unauthorized user may gain access to an account.
VMware vSphere 8.0 vCenter Appliance Photon OS 4.0 Security Technical Implementation Guide 2023-10-29


Check Text ( C-62609r933666_chk )
At the command line, run the following command to verify the pam_faildelay.so module is used:

# grep '^auth' /etc/pam.d/system-auth

Example result:

auth required pam_faillock.so preauth
auth required pam_unix.so
auth required pam_faillock.so authfail
auth optional pam_faildelay.so delay=4000000

If the pam_faildelay.so module is not present with the delay set to at least four seconds, this is a finding.

Note: The delay is configured in milliseconds.
Fix Text (F-62518r933667_fix)
Navigate to and open:


Add or update the following line:

auth optional pam_faildelay.so delay=4000000

Note: On vCenter appliances, the equivalent file must be edited under "/etc/applmgmt/appliance", if one exists, for the changes to persist after a reboot.