Having done a lot research, I have found that my modem and my router have the same IP. Many places are suggesting that I put the modem into a "Bridged Ethernet" mode, and then configure the router. Does that sound right?
Uhhh, so you're telling us NOW this is not just a DSL modem, but combo DSL modem + router (e.g., 2-wire)?! LOL
Yeah, when connecting one router to another, you typically have to assign different networks to each to avoid confusion. Otherwise the WAN port on the downstream router has an IP that's valid on both routers. And then routing between them becomes unpredictable. Using different networks (e.g., 192.168.1.x and 192.168.2.x) eliminates any ambiguity.
But in this particular case, the better solution (to avoid double NATâ€™ing) is to place the DSL modem+router in bridge mode. That demotes the device to a pure modem and passes the public IP to the WAN port of your router. And so you can keep your router using the default local network (e.g., 192.168.1.x).
I guess the lesson for me is, always ask for make & model, assume nothing (which I try to do but sometimes forget). LOL