Apache webserver outage - need help with forensics

Bob Brennan rbrennan96 at gmail.com
Thu Apr 14 15:25:54 UTC 2005


On 4/14/05, Shahzad Chohan <shahzad.chohan at gmail.com> wrote:
> Could it be that demon blocked connections to the http port.

I just checked in with demon technical support who said "we
could/would not block just your port 80". I tend to believe that
99.99% (*never* believe anything 100%). The connection was verified
(by me) as good throughout the outage.

bob

> On 4/14/05, Bob Brennan <rbrennan96 at gmail.com> wrote:
> > > Bob Brennan wrote:
> > > | I have a server which went completely unresponsive today on port 80
> > > | for 20 minutes and would appreciate any pointers as to what might have
> > > | happened.
> > >
> > > You don't say where or how the box is connected to the Internet... if
> > > via a hosting / rackspace company then I think the first move would be a
> > > polite email enquiring if they changed any of their routing,
> > > firewalling, proxying, etc arrangements or settings at that time yesterday.
> >
> > Hi Andy - my connection is through a static IP leased from Demon,
> > which is a major ISP in the UK. It is ADSL through a Thompson router,
> > the default inbound server is set to my server's internal IP. At the
> > server I use Firestarter with only HTTP, HTTPS, FTP, SMTP, and POP3
> > ports open. The setup has been working for a few months like that.
> >
> > Curiously, and I can't believe this has anything to do with it, I had
> > to put in a whitelist request that morning because my mailserver IP
> > was being rejected as "residential". The whitelist change has not yet
> > taken effect.
> >
> > Unfortunately at the time it was down I was away from the machine and
> > could only test it from 3 separate outside locations, all of which
> > showed mail and ftp working as normal and http just plain not there.
> > Strange...
> >
> > bob




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