pam_faildelay is a PAM module that can be used to set the delay on failure per-application.
delay is given, pam_faildelay will
use the value of FAIL_DELAY from
Turns on debugging messages sent to syslog.
Set the delay on failure to N microseconds.
Delay was successful adjusted.
The specified delay was not valid.
The following example will set the delay on failure to 10 seconds:
auth optional pam_faildelay.so delay=10000000