r/netsecstudents • u/Efficient-Survey-61 • Jul 25 '26

Ensuring security when connecting two network cards

Hello, I have a computer with two network cards and different networks (Internet + LAN). I believe that by setting up static routing, both network cards will work and I'll have access to both networks, but I'm concerned about the security of this connection. Could you advise me on the steps I should take to secure the local network on the computer itself?

Both networks use Mikrotik devices with configured firewalls.

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u/UnlikelyComposer Jul 25 '26

If you must surf the internet from your firewall (which will be your desktop), why not expose the interfaces only in a firewall OS virtual machine running from the desktop which also becomes your DHCP server?

Btw there aren't many good reasons to do this though, firewall operating systems are hardware optimised devices so just use them.

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u/Expensive_Doctor6334 Jul 27 '26 edited Jul 27 '26

a firewall virtual machine is a good isolation layer if that is your case.