How I can install a second NIC ?

[fonso]

First time sorry about my Englis!.

I have one NIC configurated wiht a local network on my SCO. The workstations do telnet access to the SCO server.
Now I need to connect my SCO to a one router to accept incomings telnets from Internet. I neet to do telnet services from incomig calls from de router, but I don't want to open the local network to the Internet. I think the best choice is to install one second NIC on the SCO an plug the router directly to these NIC.
It's possible ?.
I need that the network traffic between the two networks don't are possible, don't to be visible betwen them. I need they are not possibilities to acces to my local network from the incoming calls from the router.
How I can do this ?.


Fonso from Spain.
Thank you for your time.
Regards.

 

[Wonboodoo]

2nd NIC will work. Just make sure it is not running as a gateway (in the TCP/IP config setup screen somewhere).

Probably not as secure as it should be. Putting a device with telnet access on the internet is an open invitation to hackers and if a hacker gets into your SCO box (in your proposed configuration) he will have access to your entire internal network.

You probably should stick a firewall between this SCO server and the rest of your internal network and only allow traffic through that is necessary and nothing more.

You should make sure your SCO box is fully patched and shut down all unnecessary services. If you know where these telnet sessions are coming from you can also run products like "ssh" and TCPWrappers to limit hacking.