Firewall on Dual ISP's

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Posted by grantr, 09-15-2008, 07:05 AM
Hi Guys, I'm tired of searching and battling to get this setup of mine right, so i decided to post this thread hoping to find someone who has done this or atleast can steer me in the correct way of doing it. I have multiple ISP's, so, 2 routers with different ip's on different subnets to the network. I also have a firewall with 3 NIC cards, obviously the way i want it is eth0 LAN = Green | eth1 WAN = Red | eth2 WAN = Red. I decided to try endian firewall amongst others (Shorewall, smoothwall, etc). In essence, what i need to do, is forward particular ports to one ISP and all other remaining ports i want to the other ISP, this MUST be on the outbound traffic from the internal network. So for example: eth0 = Lan eth1 = Wifi ISP eth2 = Dsl ISP So, from eth0 on port (example) 25 must go through eth2 (Dsl) along with ports 7667, 110, etc. Then ports such as 443, 80, 21, etc must go through eth1 coming from eth0. I hope this explains enough on what i want to do, so if there is anyone out there who can help me with this i will appreciate it. Regards, Grant