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# Fail2Ban configuration file## Author: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>##[INCLUDES]before = iptables-common.conf[Definition]# Option: actionstart# Notes.: command executed once at the start of Fail2Ban.# Values: CMD## Changing iptables rules requires root privileges. If fail2ban is# configured to run as root, firewall setup can be performed by# fail2ban automatically. However, if fail2ban is configured to run as# a normal user, the configuration must be done by some other means# (e.g. using static firewall configuration with the# iptables-persistent package).## Explanation of the rule below:# Check if any packets coming from an IP on the f2b-<name># list have been seen in the last 3600 seconds. If yes, update the# timestamp for this IP and drop the packet. If not, let the packet# through.## Fail2ban inserts blacklisted hosts into the f2b-<name> list# and removes them from the list after some time, according to its# own rules. The 3600 second timeout is independent and acts as a# safeguard in case the fail2ban process dies unexpectedly. The# shorter of the two timeouts actually matters.actionstart = if [ `id -u` -eq 0 ];then <iptables> -I <chain> -m recent --update --seconds 3600 --name f2b-<name> -j <blocktype>;fi# Option: actionstop# Notes.: command executed once at the end of Fail2Ban# Values: CMD#actionstop = echo / > /proc/net/xt_recent/f2b-<name>if [ `id -u` -eq 0 ];then <iptables> -D <chain> -m recent --update --seconds 3600 --name f2b-<name> -j <blocktype>;fi# Option: actioncheck# Notes.: command executed once before each actionban command# Values: CMD#actioncheck = test -e /proc/net/xt_recent/f2b-<name># 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 = echo +<ip> > /proc/net/xt_recent/f2b-<name># 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 = echo -<ip> > /proc/net/xt_recent/f2b-<name>[Init]