Asterisk iptables block bruteforce attacks howto with fail2ban

yum -y install fail2ban

vi /etc/fail2ban/jail.conf

[asterisk-tcp]

enabled = true
filter   = asterisk
action   = iptables-multiport[name=asterisk-tcp, port="5060,5061", protocol=tcp]
           sendmail-whois[name=Asterisk, dest=you@example.com, sender=fail2ban@example.com]
logpath = /var/log/asterisk/messages
maxretry = 10

[asterisk-udp]

enabled = true
filter   = asterisk
action   = iptables-multiport[name=asterisk-udp, port="5060,5061", protocol=udp]
           sendmail-whois[name=Asterisk, dest=you@example.com, sender=fail2ban@example.com]
logpath = /var/log/asterisk/messages
maxretry = 10

vi /etc/fail2ban/filter.d/asterisk.conf

# Fail2Ban configuration file
#
# Author: Xavier Devlamynck
#
# $Revision$
#

[INCLUDES]

# Read common prefixes. If any customizations available -- read them from
# common.local
before = common.conf

[Definition]

# Option: failregex
# Notes.: regex to match the password failures messages in the logfile. The
#          host must be matched by a group named "host". The tag "" can
#          be used for standard IP/hostname matching and is only an alias for
#          (?:::f{4,6}:)?(?PS+)
# Values: TEXT
#
failregex = NOTICE%(__pid_re)s .*: Registration from '.*' failed for '' - Wrong password$
            NOTICE%(__pid_re)s .*: Registration from '.*' failed for '' - No matching peer found$
            NOTICE%(__pid_re)s .*: Registration from '.*' failed for '' - Username/auth name mismatch$
            NOTICE%(__pid_re)s .*: Registration from '.*' failed for '' - Device does not match ACL$
            NOTICE%(__pid_re)s .*: Registration from '.*' failed for '' - Peer is not supposed to register$
            NOTICE%(__pid_re)s .*: Registration from '.*' failed for '' - ACL error (permit/deny)$
            NOTICE%(__pid_re)s failed to authenticate as '.*'$
            NOTICE%(__pid_re)s .*: No registration for peer '.*' (from )$
            NOTICE%(__pid_re)s .*: Host failed MD5 authentication for '.*' (.*)$
            NOTICE%(__pid_re)s .*: Failed to authenticate user .*@.*$

# Option: ignoreregex
# Notes.: regex to ignore. If this regex matches, the line is ignored.
# Values: TEXT
#
ignoreregex =
~
~
~
~

chkconfig fail2ban on
service fail2ban start

cat /var/log/fail2ban.log
2013-11-25 09:17:43,789 fail2ban.server : INFO   Changed logging target to /var/log/fail2ban.log for Fail2ban v0.8.7
2013-11-25 09:17:43,791 fail2ban.jail   : INFO   Creating new jail 'asterisk-udp'
2013-11-25 09:17:43,828 fail2ban.jail   : INFO   Jail 'asterisk-udp' uses Gamin
2013-11-25 09:17:43,944 fail2ban.jail   : INFO   Initiated 'gamin' backend
2013-11-25 09:17:43,985 fail2ban.filter : INFO   Added logfile = /var/log/asterisk/messages
2013-11-25 09:17:43,987 fail2ban.filter : INFO   Set maxRetry = 10
2013-11-25 09:17:43,989 fail2ban.filter : INFO   Set findtime = 600
2013-11-25 09:17:43,991 fail2ban.actions: INFO   Set banTime = 600
2013-11-25 09:17:44,067 fail2ban.jail   : INFO   Creating new jail 'asterisk-tcp'
2013-11-25 09:17:44,068 fail2ban.jail   : INFO   Jail 'asterisk-tcp' uses Gamin
2013-11-25 09:17:44,070 fail2ban.jail   : INFO   Initiated 'gamin' backend
2013-11-25 09:17:44,072 fail2ban.filter : INFO   Added logfile = /var/log/asterisk/messages
2013-11-25 09:17:44,074 fail2ban.filter : INFO   Set maxRetry = 10
2013-11-25 09:17:44,077 fail2ban.filter : INFO   Set findtime = 600
2013-11-25 09:17:44,078 fail2ban.actions: INFO   Set banTime = 600
2013-11-25 09:17:44,129 fail2ban.jail   : INFO   Jail 'asterisk-udp' started
2013-11-25 09:17:44,136 fail2ban.jail   : INFO   Jail 'asterisk-tcp' started

~