fail2ban/config/action.d/mail-whois-lines.conf

# Fail2Ban configuration file
#
# Author: Cyril Jaquier
# Modified-By: Yaroslav Halchenko to include grepping on IP over log files
#

[Definition]

# Option:  actionstart
# Notes.:  command executed once at the start of Fail2Ban.
# Values:  CMD
#
actionstart = printf %%b "Hi,\n
              The jail <name> has been started successfully.\n
              Regards,\n
              Fail2Ban"|mail -s "[Fail2Ban] <name>: started" <dest>

# Option:  actionstop
# Notes.:  command executed once at the end of Fail2Ban
# Values:  CMD
#
actionstop = printf %%b "Hi,\n
             The jail <name> has been stopped.\n
             Regards,\n
             Fail2Ban"|mail -s "[Fail2Ban] <name>: stopped" <dest>

# Option:  actioncheck
# Notes.:  command executed once before each actionban command
# Values:  CMD
#
actioncheck = 

# Option:  actionban
# Notes.:  command executed when banning an IP. Take care that the
#          command is executed with Fail2Ban user rights.
# Tags:    See jail.conf(5) man page
# Values:  CMD
#
actionban = printf %%b "Hi,\n
            The IP <ip> has just been banned by Fail2Ban after
            <failures> attempts against <name>.\n\n
            Here are more information about <ip>:\n
            `whois <ip>`\n\n
            Lines containing IP:<ip> in <logpath>\n
            `grep '\<<ip>\>' <logpath>`\n\n
            Regards,\n
            Fail2Ban"|mail -s "[Fail2Ban] <name>: banned <ip>" <dest>

# Option:  actionunban
# Notes.:  command executed when unbanning an IP. Take care that the
#          command is executed with Fail2Ban user rights.
# Tags:    See jail.conf(5) man page
# Values:  CMD
#
actionunban = 

[Init]

# Default name of the chain
#
name = default

# Destinataire of the mail
#
dest = root

# Path to the log files which contain relevant lines for the abuser IP
#
logpath = /dev/null