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Binding Two IP Address to one Ethernet Card

Binding Two IP Address to one Ethernet Card

Binding Two IP Address to one Ethernet Card

Hello All,

I have a small network at home on a ethernet network.  It was using the TCP/IP protocol.  I recently had the cable modem service installed but the technician destroyed the network by changing all the settings.  I have tried to reconfigure, all attempts failing.

The only support that their tech support could give was to bind two ip addresses to this one network card.  So the Question:

1. Can you do this and how?
2. Is that the best solution?

Any help would be appreciated.



RE: Binding Two IP Address to one Ethernet Card

i am not sure but i have never seen it done to ips to the same nic because that would require to mac address and you only get one

the best way is two nic's if you need it most cable and dsl company give the 2nd nic.

So long and thanks for all the fish.

RE: Binding Two IP Address to one Ethernet Card

Binding two IP Addresses to one nic card is possible.  I know you can do it with Windows NT and 2000 although I'm not sure about Windows 9x systems.  Under Windows NT you would go into your TCP/IP Properties then click on the Advanced button.  In this section you can configure the system to bind two ip addresses to one nic card.  I wouldn't recommend this if you are running a cable modem.  For security I would install two nic cards on your system then purchase an inexpensive proxy server to run between your home network and the "real world"  If you are running Windows 2000 I believe it comes with a built in Proxy that you can use to share your internet connection, although I've never used it.  Post if you have further questions.

david e

RE: Binding Two IP Address to one Ethernet Card

Unfortunately, you cannot do this on the Win9x systems.  Windows NT, 2000 and Linux systems will handle this fine though (using the methods in the post by Sobak above or using ethX:Y interfaces with ifconfig respectively).  If you have an extra machine available, you may install one of these OS's, bind the cable IP and a non-routable IP to it and use it as a proxy for your other machines which would all have non-routable ips assigned to them.

Or you can buy two NICs...which is probably the best route to take, but the least fun.

Hope this helps,


RE: Binding Two IP Address to one Ethernet Card

Thanks for all the help guys,

Lot's of ideas to keep me going through the long weekend!



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