+ 0 Votes so what "router" is AT&T giving you? CG IT 4 years ago and what did they say about it? and what's the demarc point? + 0 Votes sorry but dont have the model rlynch@lockhartcadillac. 4 years ago I have already left for the day so I cant give you the model. I am used to seeing dsl service come with just a modem, you then plug that into your router and go from there. The hardware they installed was a modem and router in one, as they called. I am able to log into the att hardware and configure lan subnets, dhcp, and even some really generic firewall settings. I may not have any problem at all plugging a sonciwall tz210 into it, but I figured I would check since I havent done so like this before. The setup is just a regular analog phone line specifically for this dsl service. This line is plugged into the back of the att modem/router, and then from one of the switch ports on the back of the router/modem to our pc's. + 0 Votes no different than having multiple subnets CG IT 4 years ago The Sonicwall WAN is on the AT&T router's lan. So if you want to publish services to the internet, you can put the Sonicwall in the DMZ or you can simply turn off the AT&T router firewall. If that router has the capabilities, simply turn off the gateway feature and make it a simple router, or if it can, like the netopia's put it in bridge mode. The thing to remember is routers breakup larger networks into smaller ones. 2 routers = 2 networks and the gateways are the local subnet router. DNS stays the same. + 0 Votes thanks rlynch@lockhartcadillac. 4 years ago sounds like bridge mode is the way to go in this setup. thanks again.