I have 2 routers, one behind the other. The address of my PC is 192.168.10.100. The ip of the first router connected to the cable modem is 192.168.15.1, and the second router attached to the first router was assigned 192.168.15.100 from the NAT of the first router but has a default gateway of 192.168.10.1
For the first router I set the DMZ to 192.168.15.100
For the second router I set the DMZ to 192.168.10.100.
I am unable to connect from another PC. Have I setup the routers properly to forward all ports?