probe router wirelessly, double NAT

[thufir]

On Sun, 29 Dec 2013 08:45:31 +0100, Nils Kassube wrote:

> 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:
>> 
>> http://www.iogear.com/product/GWU627/
>> 
>> 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:192.168.0.15  Bcast:192.168.0.255
> 
> [...]
> 
>> thufir at dur:~$ traceroute 192.168.1.1
> 
> 192.168.1.1 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 192.168.0.1 which seems to be your router?
> 
>> traceroute to 192.168.1.1 (192.168.1.1), 30 hops max, 60 byte packets
>>  1  192.168.0.1 (192.168.0.1)  1.364 ms  6.244 ms  6.238 ms 2  * * *
>>  3  64.59.147.161 (64.59.147.161)  19.651 ms  21.628 ms  21.655 ms 4 
>>  rc2bb-tge0-4-0-5.vc.shawcable.net (66.163.69.33)  21.772 ms rc2bb-
>> tge0-13-0-10.vc.shawcable.net (66.163.69.141)  24.005 ms rc2bb-
>> tge0-13-0-6.vc.shawcable.net (66.163.69.137)  23.947 ms
> 
> Your router tries to find the way to 192.168.1.1 via the public
> internet. That can't work because private addresses should not be
> reachable that way.
> 
> 
> Nils


Exactly, the GWU627 is a bridge.  My ip address is in 192.168.0.x, that's 
what the bride provides. 

http://192.168.0.1/Docsis_system.asp in firefox brings up the interface 
for the Cisco DPC3825 DOCSIS 3.0 Gateway (router).

I **believe** that the DPC3825 gives out addresses in the 192.168.1.x 
range, but I see it as 192.168.0.1 because the GWU627 is a bridge.

Is the above a correct understanding?

Basically, I want to probe the router.  

When I ran 12.04 LTS earlier today, Vuze worked fine.  Now that I've 
installed 13.10, Vuze won't connect (0 users).

I don't see how it could be the router or ISP, but, still, want to try to 
gather some data.



thanks,

Thufir