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Date:      Mon, 21 Oct 2002 14:05:25 -0700 (PDT)
From:      Archie Cobbs <archie@dellroad.org>
To:        Leonard Chung <leonardc@cs.berkeley.edu>
Cc:        freebsd-net@FreeBSD.ORG
Subject:   Re: MPD PPTP tunneling intermittantly fails
Message-ID:  <200210212105.g9LL5PjY059864@arch20m.dellroad.org>
In-Reply-To: <AEEMJFAIHDPJNCAKCHHBMELLCHAA.leonardc@cs.berkeley.edu> "from Leonard Chung at Oct 20, 2002 10:19:46 pm"

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Leonard Chung writes:
> Some additional info: from looking at an ethereal trace, I'm seeing source
> quenches coming back to the machine VPN'ing in. Interestingly, ethereal also
> reports an invalid checksum on a bunch of those packets. The strange thing
> is, this machine has acted as a router/NAT for quite a while and so of all
> the machines on the network, it's hardware is probably the most stable
> (easily 150+ day uptimes).

Not sure what that all means, probably worth further investigation.

Don't know about Etherreal, but tcpdump had a bug where it would
declare an invalid checksum on packets for which only the first
portion was captured (due to a limited snap length). Etherreal
may possibly have the same problem.

-Archie

__________________________________________________________________________
Archie Cobbs     *     Packet Design     *     http://www.packetdesign.com

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