shorewall_code/Samples/two-interfaces/masq

#	
#	Shorewall 1.4 - Sample Masquerade file For Two Interfaces
#
#	etc/shorewall/masq
#
#	Use this file to define dynamic NAT (Masquerading) and to define Source NAT
#	(SNAT).
#
#	Columns are:
#
#	INTERFACE
#			Outgoing interface. This is usually your internet
#			interface. If ADD_SNAT_ALIASES=Yes in
#			/etc/shorewall/shorewall.conf, you may add ":" and
#			a digit to indicate that you want the alias added with
#			that name (e.g., eth0:0). This will allow the alias to
#			be displayed with ifconfig. THAT IS THE ONLY USE FOR
#			THE ALIAS NAME AND IT MAY NOT APPEAR IN ANY OTHER
#			PLACE IN YOUR SHOREWALL CONFIGURATION.
#
#			This may be qualified by adding the character
#			":" followed by a destination host or subnet.
#
#
#	SUBNET
#			Subnet that you wish to masquerade. You can specify this as
#			a subnet or as an interface. If you give the name of an
#			interface, you must have iproute installed and the interface
#			must be up before you start the firewall.
#
#			In order to exclude a subset of the specified SUBNET, you
#			may append "!" and a comma-separated list of IP addresses
#			and/or subnets that you wish to exclude.
#
#			Example: eth1!192.168.1.4,192.168.32.0/27
#
#			In that example traffic from eth1 would be masqueraded unless
#			it came from 192.168.1.4 or 196.168.32.0/27
#
#	ADDRESS (Optional)  	
#			If you specify an address here, SNAT will be
#			used and this will be the source address. If
#			ADD_SNAT_ALIASES is set to Yes or yes in
#			/etc/shorewall/shorewall.conf then Shorewall
#			will automatically add this address to the
#			INTERFACE named in the first column.
#			
#			You may also specify a range of up to 256 IP
#			addresses if you want the SNAT address to be
#			assigned from that range in a round robin range
#			by connection. The range is specified by
#			<first ip in range>-<last ip in range>.
#			
#			Example: 206.124.146.177-206.124.146.180
#
#			This column may not contain DNS names.
#
#		Example 1:
#
#			You have a simple masquerading setup where eth0 connects to
#			a DSL or cable modem and eth1 connects to your local network
#			with subnet 192.168.0.0/24.
#
#			Your entry in the file can be either:
#
#			#INTERFACE		SUBNET		ADDRESS
#			eth0			eth1
#
#			or
#
#			#INTERFACE		SUBNET		ADDRESS
#			eth0			192.168.0.0/24
#
#		Example 2:
#
#			You add a router to your local network to connect subnet
#			192.168.1.0/24 which you also want to masquerade. You then
#			add a second entry for eth0 to this file:
#
#			#INTERFACE		SUBNET		ADDRESS
#			eth0			192.168.1.0/24
#
#		Example 3:
#
#			You have an IPSEC tunnel through ipsec0 and you want to
#			masquerade packets coming from 192.168.1.0/24 but only if
#			these packets are destined for hosts in 10.1.1.0/24:
#
#			#INTERFACE		SUBNET		ADDRESS
#			ipsec0:10.1.1.0/24	196.168.1.0/24
#
#		Example 4:
#
#			You want all outgoing traffic from 192.168.1.0/24 through
#			eth0 to use source address 206.124.146.176 which is NOT the
#			primary address of eth0. You want 206.124.146.176 added to
#			be added to eth0 with name eth0:0.
#
#			#INTERFACE		SUBNET		ADDRESS
#			eth0:0			192.168.1.0/24	206.124.146.176
#
##############################################################################
#INTERFACE		SUBNET		ADDRESS
eth0			eth1
#LAST LINE -- ADD YOUR ENTRIES ABOVE THIS LINE -- DO NOT REMOVE