/etc/fail2ban/action.d/mail-buffered.conf is in fail2ban 0.8.6-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | # Fail2Ban configuration file
#
# Author: Cyril Jaquier
#
# $Revision$
#
[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
Output will be buffered until <lines> lines are available.\n
Regards,\n
Fail2Ban"|mail -s "[Fail2Ban] <name>: started" <dest>
# Option: actionstop
# Notes.: command executed once at the end of Fail2Ban
# Values: CMD
#
actionstop = if [ -f <tmpfile> ]; then
printf %%b "Hi,\n
These hosts have been banned by Fail2Ban.\n
`cat <tmpfile>`
Regards,\n
Fail2Ban"|mail -s "[Fail2Ban] <name>: Summary" <dest>
rm <tmpfile>
fi
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: <ip> IP address
# <failures> number of failures
# <time> unix timestamp of the ban time
# 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 "Hi,\n
These hosts have been banned by Fail2Ban.\n
`cat <tmpfile>`
\nRegards,\n
Fail2Ban"|mail -s "[Fail2Ban] <name>: Summary" <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: <ip> IP address
# <failures> number of failures
# <time> unix timestamp of the ban time
# 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
# Destination/Addressee of the mail
#
dest = root
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