On Thursday, February 12, 2026 05:08:00 PM Dan Ritter wrote: > [email protected] wrote: > > * The TMO-G4AR device is not a router, but it does NAT (I think it > > does > > > > DHCP also, but I'm not using that at all, I use static (IPv4) addresses), > > does not do routing, and cannot be switched to bridge mode. > > If it does NAT, then by definition it is a router. It may not be > a very good or configurable one, but it has two interfaces and > selectively routes packets from one to the other while changing > them (NAT).
I'm not sure it does that. I think either of those interfaces (Rj-45 ports) interfaces to the Internet, but I'm not sure that it routs packets between those two ports -- I'm fairly sure it doesn't. > > The question(s): I have a Ubiquiti Edge Router X which I used with my > > previous cable based ISP. I'd like to add it back to the LAN to enable > > communications between devices, but because the TMO device does NAT and > > so would the Edge Router, I'll have a double NAT setup -- I'm worried > > about that especially for my VOIP communications. > > Any of these three options are available to you: > > * You can turn off NAT on the EdgeRouter, connect it to the TMO > thing, and go from there. > > * You can connect the TMO thing to the EdgeRouter on a LAN port > instead of a WAN port, and avoid NAT that way. > > * You can buy a cheap ethernet switch ($20-40) and connect it to > the TMO thing, then connect the other computers to the switch. That is the way things are set up now, and I cannot talk between computers -- all 3 computers are connected to one switch and it is connected to the TMO device. (Well, one computer connects to another switch first and then to the switch with the other two computers.) > > 2. The slightly more complicated one for me to explain is to somehow > > stick with one Ethernet interface per computer, run each to a switch, > > and have those switches interface to both the TMO and the Edge Router. > > Again, I'm guessing this could be made to work, and would require > > "gymnastics" of some sort. > > What would the EdgeRouter be doing in this scenario? The EdgeRouter would route packets between the computers on the LAN, as I'm 95% certain the TMO device does not / can not. Let me ask -- suppose I connected those 3 computers to a switch with no router anywhere -- could those computers talk to each other? (Or maybe they could with adjustments to the routing tables in each??)
