Traceroute to ubuntuforums never finishes

[Mark Haney]

gasell wrote:
> Hello,
> 
> I'm having trouble logging in to ubuntuforums. Even though my password/username combination is correct and I get the redirection page thanking me for logging in, I'm not really logged in.
> 
> For some reason traceroute to forums does't get further from gw0-0-gr.canonical.com <http://gw0-0-gr.canonical.com/>  (91.189.88.10 <http://91.189.88.10/> ). It just continues with *** forever (till 255). Asked a friend for the same traceroute and there gw0-0-gr.canonical.com <http://gw0-0-gr.canonical.com/>  (91.189.88.10 <http://91.189.88.10/> ) is output twice and then feijoa.canonical.com <http://feijoa.canonical.com/>  [91.189.94.12 <http://91.189.94.12/> ] is reached successfully.
> 
> Is this a problem with the hop itself or should I bother my ISP?
> 
> 

To me this looks like a routing problem from your ISP.  Based on what 
you are telling us, traceroutes die at one point.  That sounds like from 
that point, the next hop has a different route BACK to you than the rest 
of the /good/ hops.  In other words at the point that 91.189.94.12 gets 
your packet it is finding a /better route/ to you than the original path 
it took to get there.  Unfortunately, it looks like that route doesn't 
make it back to you.  This is either a misconfig with your ISP, or 
possibly with canonical's routers.

It's also possible that your friends next hop isn't the same as yours. 
Although not likely.

Of course this is all a guess, I've not looked at it.


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Mark Haney
Sr. Systems Administrator
ERC Broadband
(828) 350-2415

Call (866) ERC-7110 for after hours support