How to use two network adapters for two different networks on the same computer

Is it possible to use two network adapters on the same computer where one network is internal only without internet access.  The other network is a router that is connected to the internet.

This is for a windows xp station.
LVL 55
Scott Fell, EE MVEDeveloper & EE ModeratorAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

You set one of them up on the internal network with that IP range.  You do not use a default gateway on this card.
You set the other one to be the outside and add the default gateway on that side.

Note they MUST have different IP ranges or this will not work.

Also - it is not really a normal thing to do.... It would be better for a work station to be on just one network and use routers or servers to bridge networks.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Default gateway must point in direction of internet.
If more internal network exist then some additional routing must be set up.

However there only is one DNS, even if you set up different DNS on the 2.
Yes.  It's actually quite simple, especially if there is a DHCP server for each network.  Windows will be able to 'see' the Internet on one NIC and automatically set the default route ( to use that NIC.
How do you know if your security is working?

Protecting your business doesn’t have to mean sifting through endless alerts and notifications. With WatchGuard Total Security Suite, you can feel confident that your business is secure, meaning you can get back to the things that have been sitting on your to-do list.

Only set up 'routing' if you want people on one side (say the internal network) being able to jump over your connection to get to the other side (say the internet).
As above - this is a bad idea to use your work station for this.
What about when you remove it or reboot it.

You do not need to turn it on, if it is only for you to access bother networks - but again - that is bad design.

It can be done - but it is probably a bad idea to do it
Scott Fell, EE MVEDeveloper & EE ModeratorAuthor Commented:
The internal network has access to data that is required for reports and is not open to the outside.  The 2nd network is only one other computer connected to a modem/router.    I'm trying to avoid plugging in one CAT cable for network A, then unplug and plug in 2nd cable for the internet.
Well as above - you can do it by adding a second network card.
Its not exactly good practice to do this.  Your workstation is running XP.  
This makes it more likely to be  hackable as it is no longer patched by MS.

A better idea would be to have a firewall / router and connect it all into that.
Secure it properly and then live inside your firewalled area.

...but... if you don't want to do that - then.... yes.... it works with two network cards :)
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Networking Hardware-Other

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.