shorewall_code/Shorewall/Samples/three-interfaces/rules

#
# Shorewall version 4.0 - Sample Rules File for three-interface configuration.
# Copyright (C) 2006-2014 by the Shorewall Team
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# See the file README.txt for further details.
#------------------------------------------------------------------------------------------------------------
# For information about entries in this file, type "man shorewall-rules"
######################################################################################################################################################################################################
#ACTION		SOURCE		DEST		PROTO	DEST	SOURCE		ORIGINAL	RATE		USER/	MARK	CONNLIMIT	TIME		HEADERS		SWITCH		HELPER
#							PORT	PORT(S)		DEST		LIMIT		GROUP
?SECTION ALL
?SECTION ESTABLISHED
?SECTION RELATED
?SECTION INVALID
?SECTION UNTRACKED
?SECTION NEW

#       Don't allow connection pickup from the net
#
Invalid(DROP)	net		all		tcp
#
#	Accept DNS connections from the firewall to the Internet
#
DNS(ACCEPT)	$FW		net
#
#
#	Accept SSH connections from the local network to the firewall and DMZ
#
SSH(ACCEPT)     loc             $FW
SSH(ACCEPT)     loc             dmz
#
#	DMZ DNS access to the Internet
#
DNS(ACCEPT)	dmz		net


# Drop Ping from the "bad" net zone.

Ping(DROP)   	net             $FW

#
#       Make ping work bi-directionally between the dmz, net, Firewall and local zone
#       (assumes that the loc-> net policy is ACCEPT).
#

Ping(ACCEPT)    loc             $FW
Ping(ACCEPT)    dmz             $FW
Ping(ACCEPT)    loc             dmz
Ping(ACCEPT)    dmz             loc
Ping(ACCEPT)    dmz             net

ACCEPT		$FW		net		icmp
ACCEPT		$FW		loc		icmp
ACCEPT		$FW		dmz		icmp

# Uncomment this if using Proxy ARP and static NAT and you want to allow ping from
# the net zone to the dmz and loc

#Ping(ACCEPT)    net             dmz
#Ping(ACCEPT)    net             loc