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Two network cards

By rvoight ·
i. I have a Windows 2000 Pro workstation that has two network cards installed. One is connected to a network that has Internet access (via DSL). The other card is connected to a network that doesn't have internet access (peer-to-peer).
When both network cards are enabled on my computer, I cannot access the internet. But when I disable the non-internet network card, I have internet access. Each card is configured to a static ip address, and each one connects perfectly. The problem is when both are enabled at the same time, internet access is broken.

Any help is greatly appreciated.

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by curlergirl In reply to Two network cards

This is a common mistake. You need to make sure you have only one default gateway defined, and that needs to be on the NIC card that is connected to the external router/modem. On the NIC card that is connected to your peer-to-peer network, leave the default gateway field blank. On the NIC card that will connect you to the Internet, use that network's default gateway (i.e., router/DSL modem address).

Hope this helps!

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by sgt_shultz In reply to Two network cards

sounds like you don't have a dns server on your network. or if you do have a dns server you just need to specify it in the tcpip properties. if you are using the dsl router as a dhcp server, it'll get you in this kind of trouble.
to fix this you need to configure a dns server for the lan side and have it forward address resolution requests that aren't in your internal lan to your isp's dns server.
is this a workgroup or a domain? if domain, what is the server? do you have active directory set up. if you do, you (probably) have dns set up already. in that case you simply need to remove the * (asterisk) from the root hints on the dns server and add a forward for requests outside the lan to your isp's dns server.
see support.microsoft.com 'no internet' for articles with step by step instructions. if you have dual homed (2 nic's) workstations that work fine on your lan with both nics enabled, then use ipconfig /all on one of those and compare it to the results on the bad workstation? are you the same person who asked this question a little differently already?
this might be outside the scope of what can be answered for free in this forum. you might find the education available from microsoft tech support work the money. i'd call 'em. if you have a recently set up win2k3 server you might not evern have to pay. good luck.

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Simple Solution

by andrew In reply to

SGT Shultz is correct. You need to specify the DNS servers on the LAN network card that are on the WAN network card.

We use this technique a lot for businesses. We'll set up a main server with client terminals, and the client terminals will be on a switch with the main server, which has a second network card to connect to another switch or router for internet usage. It's a great way, too, of having a master connection for a home network. Connect all the home PCs on a switch with static IPs and then use a master PC for internet connectivity (simple solution to limit your kids' internet usage, and hard to work around).

-Andrew

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