PAP2T vs RT31P2

[ctaranto]

OK. I can see your setting as below:
#1 comcast modem (correct?). The default gateway on the device is 172.20.0.1. Now leave the DHCP enable on this device.

#2 your RT. When you connect the RT to the #1 in any port. But you must connect the other end on RT into the <B>Internet</B> port.

#3 A XP machine that connects to the RT.

If you run the ipconfig /all on the XP, you should get something like this:
IP: 172.20.0.1XX
Subnet: 255.255.255.0
Gateway: 192.168.15.1
DNS: 192.168.15.1 <- I am not sure about this one. Did you assign this?

Now open a browser,and type: http://172.20.0.1XX, the one you got from the command ipconfig /all. You might try: http://172.20.0.1XX:8080 or http://172.20.0.1XX:9999, it depends on the port VOIPo sets for you.

See if you can access.

I'm heading off to bed in a few minutes, so I can try this tomorrow. I will have to re-enable DHCP on the RT so the laptop gets an IP.

My config (roughly) is:
Motorola SB5120 Cable modem -> Linksys WRT54GL (Tomato) -> Linksys RT31P2

The cable modem assigns a public IP to the WRT. The WRT then assigns an internal IP (172.20.0.101) to the RT.

The LAN addresses on the RT are 192.168.15.x, so when enabling DHCP on the RT, the laptop gets a 192.168.15.x address (not 172.20.0.x address like you mentioned above). For DNS, I didn't assign to 192.168.15.1. I believe that's the default when NAT is enabled. When a laptop connects wirelessly to the RT, the default gateway and DNS are 172.20.0.1 (the WRT IP).

I have enabled remote administration on the RT, so I can access it via a laptop with a 172.20.0.x address.

Is there anything I didn't address?

/c