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Old 06-28-2005, 08:42 PM   #1
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Firewall : Multiple external interfaces

AT home I presently have a cable modem connected to a Linux firewall (RH) using iptables and 2.4.30 kernel. I have inherited an ADSL modem from work. Can I have both connected to this Firewall, ie I will need an additional network card (making three), or should I get a second firewall box up and running?
Old 06-28-2005, 09:08 PM   #2
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You can certainly have more than one external interface connected to the box, but you will need a NIC for each connection. Then set up routing for each interface. For example route client a to the 1st interface and client b to the second, and so forth. Iptables will support as many interfaces as the system can support, it just takes a few more lines in the firewall for each. Now load balancing might take a bit to set up, I would read up on firewall building for such things if that is the goal.
Old 06-28-2005, 09:18 PM   #3
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You can do ethernet channel bonding of the two external links. Google around the net and here for more if. Found this link here

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