PAP2T vs RT31P2

[MisterEd]

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've been following this thread and you have me confused. If I am missing something I apologize for "butting in."

Why would he be getting a 172.xx address off the LAN side of his WRT router to his (XP) computer. Unless he made changes the "normal" IP generated on the lan side would be in the private 192.168.x.xxx range. I've never seen a router (out of the box) generate a public IP on the LAN.

When I run IPCONFIG/ALL I get this (this is Win7):

• Connection-specific DNS Suffix . :
  Description . . . . . . . . . . . : Realtek PCIe GBE Family Controller
  Physical Address. . . . . . . . . : 00-xx-xx-xx-5F-9F
  DHCP Enabled. . . . . . . . . . . : Yes
  Autoconfiguration Enabled . . . . : Yes
  IPv4 Address. . . . . . . . . . . : 192.168.1.20
  Subnet Mask . . . . . . . . . . . : 255.255.255.0
  Default Gateway . . . . . . . . . : 192.168.1.1

My Voipo device is getting 192.168.1.5 and to access it I use http://192.168.1.5
Again, if I am misunderstanding something I apologize.

[sr98user]

Why would he be getting a 172.xx address off the LAN side of his WRT router to his (XP) computer. Unless he made changes the "normal" IP generated on the lan side would be in the private 192.168.x.xxx range. I've never seen a router (out of the box) generate a public IP on the LAN.

172.16.0.0 - 172.31.0.0 are class B private networks. 192.168.x.x is class C and 10.0.0.0 is the Class A. All three are private subnets and are not routable on the internet.

Most of the routers are set to give a subnet in 192.168.x.x. I think the user must have changed it to the class B private address.

[chpalmer]

LAN on 172.31.125/24 here...

[MisterEd]

172.16.0.0 - 172.31.0.0 are class B private networks. 192.168.x.x is class C and 10.0.0.0 is the Class A. All three are private subnets and are not routable on the internet.

Most of the routers are set to give a subnet in 192.168.x.x. I think the user must have changed it to the class B private address.

Yes, I realize that, but the thread read like "who's on first and what's on second" and I didn't see anywhere where he changed the router default (and have no idea WHY anyone does that on the LAN side as it makes no difference) but obviously he did. Also I now see he is plugging his laptop into the VOIPO device which gave him the 192 address which confused me as well. The thread had my head spinning with WRT RT WRT RT . I prefer "voipo device" and "WRT router" just for clarity (I did tech support training for an ISP and we preached clarity as the key with end users) .

Anyway, I should have kept my mouth, er, keyboard, shut.