[Techtalk] More Squid

[James]

Nope, no pattern to when it cuts off or for how long or what pages.

I did try tcpdump, but I didn't find anything interesting that I could
tell.  It did seem as almost if the workstation stopped talking to the
proxy, but I'm not 100% sure if that is true (I mean, if no requests are
"working" there is going to be significantly less traffic).  I could
however launch a ping and then see traffic again, so it wasn't as if the
workstation was blocked off.

I thought maybe it was a DNS issue for the Squid box (unable to keep
doing lookups?), so I tried a plethora of DNS servers: Our local one,
our upstream's and the local major ISP's.  None really seemed to resolve
the issue.

- James

> -----Original Message-----
> From: techtalk-admin at linuxchix.org 
> [mailto:techtalk-admin at linuxchix.org] On Behalf Of Raven, 
> corporate courtesan
> Sent: Monday, March 18, 2002 3:40 PM
> To: techtalk at linuxchix.org
> Subject: Re: [Techtalk] More Squid
> 
> 
> Heya --
> 
> Quoth James (Sun, Mar 17, 2002 at 09:56:14AM -0500):
> > Another day with Squid, same issues.
> > I turned debugging to the highest, but still was not able to find 
> > anything that hinted to my problem.
> 
> 	Okay, I'm by no means a Squid expert, but I'll take a 
> shot at this.
>  
> > Recap: Squid will work, but then will randomly sort of 
> "timeout" after 
> > a random number of minutes.  Several minutes after that, it 
> will start 
> > to work again, automagically.  IE will get the generic DNS 
> error and 
> > Opera on Linux will report something like "Proxy access denied."
> 
> 	Have you tried turning on tcpdump on the relevant 
> interfaces when you're seeing this problem?  (Or ideally, 
> before seeing this problem, through when you see this 
> problem.)  On the off chance that it's not a problem internal 
> to the Squid server, you'll see where the packets stop, at 
> least.  This is good for diagnosing firewalling and DNS 
> issues.  If you don't know how to use tcpdump, say so, and 
> I'll write up a quick tutorial.  (Been meaning to do that 
> anyway for the security
> course.)
> 
> 	Can you correlate this with a time of day, an "every n 
> seconds", a particular web page that it always fails with?  
> Any sort of pattern you can see as to when it fails?
> 
> Cheers,
> Raven
>  
> "Sed, sed, awk.  Like duck, duck, goose.  Sync, sync, halt.  
> It's the  order of nature."
>   -- me, after too long a day at work 
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