I seem to have a double NAT issue that i discovered when trying to open some ports. I live rent a room that includes internet, so I'm not entirely aware of what's on the network elsewhere in the house. But doing a trace route reveals two routers: 192.168.1.1 and 192.168.15.1 I asked my landlord if he had two routers attached to one another and he said no. I tend to believe him because I once took a look at the router myself when helping him with a computer. One of the routers also happens to be one used for VOIP, according to what I've read, but he does not use VOIP. I suspect that someone else in the building is could be using VOIP. But why would my connection be going through that router? Is that what happens when a router is attached to a network already with a router? There must be a way to bypass the other router or something. The passwords are all default, so I have access to both routers. I tried making the 192.168.15.1 one a switch (by changing the mode), but the internet dies when I do so. Any ideas or insight would be a big help!

If you have access to the 2nd router as well, why not open ports on it too. Thanks.

rais' suggestion, which for example, if you wanted to forward port 80 to a computer on your network, would mean you could; - on the 192.168.15.1 router, forward port 80 to whatever IP address is on your 192.168.1.1 router's WAN side. - Then forward port port 80 on your 192.168.1.1 router to whatever computer is on your local network, say 182.168.1.100. But that can be kind of messy and sometimes communications have problems going through two firewalls. What may have happened is your landlord may not have realized that the Internet modem may also be acting as a router, then he attached another router to it not realizing the modem was also acting as a router. To know fore sure, your going to have to follow the wires from router to router to modem. Assume that I already did an Internet search.