probe router wirelessly, double NAT

Nils Kassube kassube at
Sun Dec 29 07:45:31 UTC 2013

thufir wrote:
> I'm having some trouble with vuze, so am looking at some networking. 
> The computer uses a wifi adapter to connect with the router.  The
> adapter is a bit unusual:
> So the computer gets an IP address from the adapter, and the adapter
> gets an IP address from the router.  Presumably this is double-NAT?

I had a look at the manual of your GWU627 and I think the device works 
as a bridge and you have single NAT from your router.

> thufir at dur:~$ ifconfig
> eth0      Link encap:Ethernet  HWaddr 00:13:20:ac:13:b0
>           inet addr:  Bcast: 


> thufir at dur:~$ traceroute is a private IP address which is only used in your local 
network. Do you have a machine with that IP in your LAN? Or is it a typo 
and you meant which seems to be your router?

> traceroute to (, 30 hops max, 60 byte packets
>  1 (  1.364 ms  6.244 ms  6.238 ms
>  2  * * *
>  3 (  19.651 ms  21.628 ms  21.655 ms
>  4 (  21.772 ms rc2bb-
> (  24.005 ms rc2bb-
> (  23.947 ms

Your router tries to find the way to via the public 
internet. That can't work because private addresses should not be 
reachable that way.


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