Linksys router as "poor mans" DMZ
Posted on 2006-06-14
I recently upgraded the firmware on my Linksys router which I'm using in sort of a poor man's DMZ. It sits off of a 3rd NIC on my ISA Server behind our cisco router. The 192.168.... subnet used by the linksys router is completely separate from our internal network addressing scheme.
My mistake was not jotting down all the settings before the upgrade because they did not all port over (my bad). The part I'm struggling with is the static IP address. Because it sits behind our router I assume I can't leave it as 'obtain IP address automatically'. I'm pretty sure it was set to 'static IP address' before the firmware upgrade. I just can't remember what ip address, subnet mask and default gateway I'm supposed to use.
I tried using the IP address of the router itself (192.168.1.1) but with no luck (I was also using that same address as the default gateway). I tried using the IP address of the external interface of ISA. BIG MISTAKE. I had a major IP address conflict and no one could get to the internet fro a bit.
Somehow I've got to tell the router where the Internet is. Just can't recall how to do it. Anyone have the same problem? Any solutions?