Comp with 2 NICs

I have computer that I'd like to install 2 NICs in. One nic would be for a WAN (inet) connection and the other would be for a LAN connection?

How easy is this to implement in win XP?

Links would be nice. =)
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modsiwAsked:
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Ghoti_AZCommented:
So you are intending to use a computer to share its internet connection to a LAN, correct?  This is trivially easy, with the caveat that the other computers will be dependent upon the first computer being up and running.

Once both NICs are installed, you will have two LAN adapters in your Network Connections Control Panel (usually named Local Area Connection and Local Area Connection 2).  Connect one to your internet feed, make a note of which icon no has a red 'X' on it indicating a lack of connection. Then, connect the LAN.  

Right-click on your internet adapter, select Properties, and go to the Advanced tab, and put a check into the first box in the Internet Connection Sharing area.

Make sure the other computers on the LAN are set to DHCP, and you're good to go.
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modsiwAuthor Commented:
>>So you are intending to use a computer to share its internet connection to a LAN, correct?

No.

I'd like for this computer to use one network for it's internet connections and be visible to another network, the LAN (which, also has inet access through an unrelated connection).
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Ghoti_AZCommented:
In that case, no configuration is needed.  Connect one NIC to your LAN, the other to the PC's independent internet connection, and (assuming your LAN has a DHCP server) you're good to go.

In fact, if your LAN has its internet provided through the aforementioned DHCP server acting as or in concert with a router, this PC will have two concurrent internet connections.
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modsiwAuthor Commented:
The LAN connection is "acting in concert with a router that has an INet connection. However, I require that the PC uses, and only uses, it's dedicated inet connection for inet traffic.
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Ghoti_AZCommented:
I see.  In that case, your best bet is to use a static IP address with the LAN connection, and do not set a gateway; that way all outbound packets will be routed through your desired internet connection.  Naturally, I would strongly recommend a firewall on both NICs; be it software or hardware.
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modsiwAuthor Commented:
If I only configure the gateway on the inet connection, would outbound packets going to a lan PC find there way?
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Ghoti_AZCommented:
I didn't mean to set *only* a gateway, but rather to *not* set a gateway. This way, packets destined for the LAN will be properly routed to the LAN, but packets destined for any other network (i. e. the internet) would then be routed through the external interface.

If the LAN PCs have their gateway set to their ISP, their outbound packets should also stay on their accorded internet connection.
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