black listing of web traffic

Andrey Gordon andrey.gordon at gmail.com
Tue Feb 9 15:47:03 CST 2010


Can't find my IP on any of the black lists. Don't have any proxies. Sites
that behave poorly are consistent. That is to say that facebook.com,
apple.com would always come up without an issue, but cnn.com,
forever21.com(i know, don't ask, students),
store.apple.com would consistently take forever to come up.

Just wanted to check of rate-limiting web clients is a common practice
nowdays in the industry. If it's not, it's probably an unlikely cause of my
troubles...

Thanks,
Andrey

-----
Andrey Gordon [andrey.gordon at gmail.com]


On Tue, Feb 9, 2010 at 4:40 PM, Geoffrey Keating <geoffk at geoffk.org> wrote:

> Andrey Gordon <andrey.gordon at gmail.com> writes:
>
> > Hi list
> >
> > 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.
> >
> > Anyone seen that? Are there any blacklists for web access?
>
> Could it be related to the Pushdo botnet SSL traffic generation,
> <http://www.shadowserver.org/wiki/pmwiki.php/Calendar/20100129>?
> Perhaps you have an infected machine and so your IP is being
> blacklisted and/or rate-limited.
>



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