Closing off second network on NT

[Mr Chunder]

I have a question which I wonder if you excellent folks could answer please :)

I have a dual network NT webserver where one network is going out to the internet and the other is for backend activity only. All apps that I run e.g. mySQL listen on both networks.

I would like to be able to stop certain apps listening on both networks. I presume I could do it at OS level but wouldn't that stop net facing apps like IIS from responding ? Or am I better of trying to get my apps to listen to only one network which would be dependent on what facilities these apps have for specifying which network to listen to ?

Or, I suppose, I could use a firewall and close off ports as necessary?

Whats the best way to do it ?

:confused:

Thanks

[JTY]

Well, if the app allows you to choose which network interfaces to use then that would be the best approach. Otherwise, the use of a firewall would be a good way to block access.