Jamie Fowlie wrote: > Present setup: > > Internet <----> ROUTER (212.51.61.xxx) <-------> NT Server NIC 1 > (212.51.61.xxy) > NT Server >NIC 2 (10.10.10.1) <-------> Linux/PCs(10.10.10.n) > > (Windows NT is running WINROUTE lite to handle portmapping) > > Desired: > > Internet <----> ROUTER (212.51.61.xxx) <-------> Linux FIREWALL NIC 1 > (212.51.61.xxy)---->All servers/PCs (10.10.10.n) > > Question: Is it absolutely necessary to have two NICs in my firewall box?
Yes! (Aside: I presume you are using 10(or 100)BaseT (twisted pair) and you have a hub, switch, or similar to connect all your servers, but the answer is the same if you are using coax (10Base2).) Think of the Firewall as a filter. It prevents certain traffic on one side of it from getting to the other side. If you have only one NIC, the traffic appearing on one side that you don't want to get to the other side is all on one NIC -- i.e., it gets to both sides and the firewall is not doing it's job. Randy Kramer > One for the outside connection (212. etc) and another to handle the LAN > (192.168. etc)? Or can I manage the entire steup with one NIC?
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