Are you thinking of Bridged mode?

I used to do this until something happened at my ISP and my router can no longer authenticate against my ISP's PPPoE server. Now I have my modem providing NAT and DHCP, and my router is just a dumb access point. The only problem is my modem has an externally accessible administration page running on port 4567, and telnet on port 1111 that I can't turn off, even when all remote management configuration options are turned off. I've had to set up a cronscript to attempt to telnet into the thing continuously, and if successful it will kill the httpd server and telnet daemon.

It's absolutely ridiculous how insecure home network equipment is.

>It's absolutely ridiculous how insecure home network equipment is.

But remember not to leave your wireless access open to passers-by. That helps hackers, and Al-Qaeda, and pedophiles, and drug dealers! /sarcasm

UPnP is the one that gives me concern. User programs can punch holes in your firewall without you knowing about it. Now you have a port open on your firewall... pointed at someone's computer without your knowledge. UPnP goes off - if you want that port open, let's talk about it, little software thingy.

UPnP does not decrease security in a home/SMB environment.

There is a good reason why reverse shells exist.

Yeah, I'm running in bridged mode, it works great. I used to run it like your current setup, but now I can finally run the Tomato router as my main one, and QoS is just too amazing to pass up on...