Provided by: libpam-shield_0.9.6-1.2_amd64 
NAME
shield.conf - pam_shield configuration file
DESCRIPTION
/etc/security/shield.conf is the configuration file for PAM module pam_shield, which locks out remote
attackers trying password guessing.
OPTIONS
debug [on|off]
Log (or do not log) debugging information via syslog(3).
block [all-users|unknown-users]
Block all users, or only unknown users. Whether users are "known" is determined from getpwnam(3)
allow_missing_dns [yes|no]
If no, reject any connection that comes from a numerical IP address with no DNS name (as returned
by pam_get_item(3) with item_type set to PAM_RHOST).
allow_missing_reverse [yes|no]
If no, reject any connection that comes from a host with no reverse DNS entry.
allow hostname
Host or network to whitelist. These hosts are passed through with no checks or logging. Multiple
allow lines are permitted. hostname may be IP address, hostname, network/netmask, or network in
CIDR format.
db filename
Database file where login attempts are stored.
trigger_cmd command
Command to run to block/unblock a host. See shield-trigger(8) and shield-trigger-iptables(8) for
two examples.
max_conns n
Host will be blocked if more than n connection attempts from one host in interval time.
interval n
Host blocked if more than max_conns attempts in n seconds. Instead of seconds, suffix may be used:
s for seconds, m minutes, h hours, d days, w weeks, M months (30 days), y years.
retention n
Record of connection attempts retained for n seconds. Suffixes may be used as in interval. Each
host is checked for expiration when it attempts to connect, and the entire database is checked
whenever shield-purge(8) is run (by default, once a day).
FILES
/etc/security/shield.conf Configuration file for pam-shield
SEE ALSO
shield-purge(8), shield-trigger(8), shield-trigger-iptables(8)
AUTHORS
pam-shield was written by and copyright 2007 Walter de Jong <walter@heiho.net>. This manpage copyright 2010-2012 Jonathan Niehof <jtniehof@gmail.com>.