black listing of web traffic

Jon Lewis jlewis at lewis.org
Tue Feb 9 13:54:49 CST 2010


On Tue, 9 Feb 2010, Andrey Gordon wrote:

> I have a problem that I can't seem to find a solution to yet. My student
> network is being NATted out and anyone who's on that network had troubles
> accessing random websites.
> For example, going to www.apple.com or www.facebook.com would work great,
> but store.apple.com would either not load or take forever to open up.
>
> I've had that problem last week and thought I tracked it down to the NAT ip
> being black listed with one of the span black lists. Even though that IP is
> not used for mail out, that somehow seemed to affect it. Changing it to a
> different one seemed to solve the problem and I got that original address of
> the list in the mean time. Changed it back and everything was well, until
> today.
> Same symptoms, but now I don't see us listed anywhere.
> The best description of the symptoms seems to be that that IP is rate
> limited or something.

Other than the Spamhaus DROP list, I've never heard of blacklisting being 
applied to IP routing.  Were some of your IPs somehow on their DROP list?

http://www.spamhaus.org/drop/

----------------------------------------------------------------------
  Jon Lewis                   |  I route
  Senior Network Engineer     |  therefore you are
  Atlantic Net                |
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