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: / etc / fail2ban / action.d /
Filename : route.conf
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# Fail2Ban configuration file
#
# Author: Michael Gebetsroither
#
# This is for blocking whole hosts through blackhole routes.
#
# PRO:
#   - Works on all kernel versions and as no compatibility problems (back to debian lenny and WAY further).
#   - It's FAST for very large numbers of blocked ips.
#   - It's FAST because it Blocks traffic before it enters common iptables chains used for filtering.
#   - It's per host, ideal as action against ssh password bruteforcing to block further attack attempts.
#   - No additional software required beside iproute/iproute2
#
# CON:
#   - Blocking is per IP and NOT per service, but ideal as action against ssh password bruteforcing hosts

[Definition]
actionban   = ip route add <blocktype> <ip>
actionunban = ip route del <blocktype> <ip>
actioncheck =
actionstart =
actionstop =

[Init]

# Option:  blocktype
# Note:    Type can be blackhole, unreachable and prohibit. Unreachable and prohibit correspond to the ICMP reject messages.
# Values:  STRING
blocktype = unreachable