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Date:      Fri, 26 Apr 2002 09:26:09 -0700
From:      Nathan <nkinkade@dsl-only.com>
To:        gabriel_ambuehl@buz.ch
Cc:        questions@freebsd.org
Subject:   Re: Re[2]: dhclient going crazy...
Message-ID:  <20020426092609.2ce17e4c.nkinkade@dsl-only.com>
In-Reply-To: <172180938515.20020426154645@buz.ch>
References:  <1965488492.20020424150235@buz.ch> <3CC86D86.7060100@potentialtech.com> <158162746907.20020426104334@buz.ch> <3CC95A01.5000908@potentialtech.com> <172180938515.20020426154645@buz.ch>

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On Fri, 26 Apr 2002 15:46:45 +0200
Gabriel Ambuehl <gabriel_ambuehl@buz.ch> wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> 
> Hello Bill,
> 
> Friday, April 26, 2002, 3:45:37 PM, you wrote:
> >> DoS but thought that there might be a bug in the dhclient.
> > Did you reboot the box?  FreeBSD isn't very prone to binary
> > corruption, but (theoretically) it's still possible.  I wouldn't
> > blame dhclient itself, though, as I've run it for years with no
> > problems.  If your dhclient is acting up you probably need to do
> > buildworld again.
> 
> That I had already scheduled but postponed it until I could
> run cvsup again. We'll see how it's going once I'm finished with it.
> 
> >> Actually, there's a whole lot of those ARP changes for the GW,
> >> could it be that dhclient went crazy about it?
> > dhclient shouldn't have any reason to change MAC addresses.
> 
> Yeah sure but the DHCP *server* changed its...
> 
> >> That's originally what I expected to be the reason too but the NOC
> >> guy
> >> told me that they're running with 60min leases.
> > Yeah, but remember that you're running things in a sane manner, and
> > if they (for some unknown reason) went wacko, you'd think that it
> > must be the other guy as well.
> 
> Oh we all are familiar with the fact that this industry does even
> more
> fingerpointing than most others...
> 
> > my first reaction is "what did you break" (because usually that's
> > true)  Then later I find that my systems are wacked out.  Only
> 
> Yeah I know. But as I'm admin myself, I wanted to speak with the NOC
> guys which the helpdesk wouldn't let me do, stating they haven't got
> the number of the NOC anyway...
> 
> > difference is that I'll admit my mistake to the customer.
> 
> ACK (maybe not if the mistake really was too stupid ;-)
> 
> >> Neither did I. The box in question has a somewhat doubtful
> >> internal (dc0) interface that would generate watchdog alerts from
> >> time to time since a few week but despite it was running for more
> >> than a year without a single problem. I sure did upgrade it from
> >> time to time but as STABLE really is stable for the very most
> >> part, I never ever
> >> encountered any trouble while on it...
> > Well, definately take a minute to email me if you ever figure
> > it out.  I'd be curious to know what's up.
> 
> Will sure post it to the list as others seem to be interested also.

Do you have a protocol analyzer, like ethereal, that you could run when this happens - or possibly you could setup rules and run it all the time for a while?  I'm wondering if there is any other strange activity that's just not getting logged by dhclient.

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