fail2ban/config/action.d/sendmail-buffered.conf

# Fail2Ban configuration file
#
# Author: Cyril Jaquier
#
#

[INCLUDES]

before = sendmail-common.conf

[Definition]

# Option:  actionstart
# Notes.:  command executed once at the start of Fail2Ban.
# Values:  CMD
#
actionstart = printf %%b "Subject: [Fail2Ban] <name>: started on `uname -n`
              From: <sendername> <<sender>>
              To: <dest>\n
              Hi,\n
              The jail <name> has been started successfully.\n
              Output will be buffered until <lines> lines are available.\n
              Regards,\n
              Fail2Ban" | /usr/sbin/sendmail -f <sender> <dest>

# Option:  actionstop
# Notes.:  command executed once at the end of Fail2Ban
# Values:  CMD
#
actionstop = if [ -f <tmpfile> ]; then
                 printf %%b "Subject: [Fail2Ban] <name>: summary from `uname -n`
                 From: <sendername> <<sender>>
                 To: <dest>\n
                 Hi,\n
                 These hosts have been banned by Fail2Ban.\n
                 `cat <tmpfile>`
                 Regards,\n
                 Fail2Ban" | /usr/sbin/sendmail -f <sender> <dest>
                 rm <tmpfile>
             fi
             printf %%b "Subject: [Fail2Ban] <name>: stopped  on `uname -n`
             From: Fail2Ban <<sender>>
             To: <dest>\n
             Hi,\n
             The jail <name> has been stopped.\n
             Regards,\n
             Fail2Ban" | /usr/sbin/sendmail -f <sender> <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 "`date`: <ip> (<failures> failures)\n" >> <tmpfile>
            LINE=$( wc -l <tmpfile> | awk '{ print $1 }' )
            if [ $LINE -ge <lines> ]; then
                printf %%b "Subject: [Fail2Ban] <name>: summary from `uname -n`
                From: <sendername> <<sender>>
                To: <dest>\n
                Hi,\n
                These hosts have been banned by Fail2Ban.\n
                `cat <tmpfile>`
                Regards,\n
                Fail2Ban" | /usr/sbin/sendmail -f <sender> <dest>
                rm <tmpfile>
            fi

# 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

# Default number of lines that are buffered
#
lines = 5

# Default temporary file
#
tmpfile = /var/run/fail2ban/tmp-mail.txt