The maintenance program for pam_tally.so. pam_tally is a PAM module intended to deny further authentication attempts after a given count of failed authentications.
pam_tally(8) can list and reset the accumulated counts. Note that this only uses a local file (defaults to /var/adm/faillog) and has no facility to use LDAP or similar systems to combine results from several machines (or a cluster).
pam_tally provides a subset of the functionality of pam_abl, but where pam_tally simply counts failing usernames, pam_abl allows for:
On the other hand, pam_abl seems to have 2 issues at the moment:
One page links to pam_tally(8):