From 321670487e9cbe502c371767a6662c82e699f949 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Fri, 6 Jan 2012 00:51:03 +0100
Subject: [PATCH] NF: xt_recent-echo action

The default configuration can only be run by root. To actually support
running as a different user, the setup action must be disabled.
---
 config/action.d/iptables-xt_recent-echo.conf | 76 ++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 config/action.d/iptables-xt_recent-echo.conf

diff --git a/config/action.d/iptables-xt_recent-echo.conf b/config/action.d/iptables-xt_recent-echo.conf
new file mode 100644
index 00000000..f3ac80b5
--- /dev/null
+++ b/config/action.d/iptables-xt_recent-echo.conf
@@ -0,0 +1,76 @@
+# Fail2Ban configuration file
+#
+# Author: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
+#
+# $Revision: 1 $
+#
+
+[Definition]
+
+# Option:  actionstart
+# Notes.:  command executed once at the start of Fail2Ban.
+# Values:  CMD
+#
+# Changing iptables rules requires root priviledges. 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 fail2ban-<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 fail2ban-<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 = iptables -I INPUT -m recent --update --seconds 3600 --name fail2ban-<name> -j DROP
+
+# Option:  actionstop
+# Notes.:  command executed once at the end of Fail2Ban
+# Values:  CMD
+#
+actionstop = echo / > /proc/net/xt_recent/fail2ban-<name>
+
+# Option:  actioncheck
+# Notes.:  command executed once before each actionban command
+# Values:  CMD
+#
+actioncheck = test -e /proc/net/xt_recent/fail2ban-<name>
+
+# 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 = echo +<ip> > /proc/net/xt_recent/fail2ban-<name>
+
+# 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 = echo -<ip> > /proc/net/xt_recent/fail2ban-<name>
+
+[Init]
+
+# Defaut name of the chain
+#
+name = default
+
+# Option:  protocol
+# Notes.:  internally used by config reader for interpolations.
+# Values:  [ tcp | udp | icmp | all ] Default: tcp
+#
+protocol = tcp