Ethereal-dev: Re: [Ethereal-dev] FW: Ethereal and "Limiting Packet to X bytes"

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From: Guy Harris <gharris@xxxxxxxxx>
Date: Thu, 09 Mar 2006 10:54:41 -0800
Kelly Sides wrote:


We are using Ethereal for hands on experience and we are wondering why
when you try to capture and you want to limit Packets to X bytes, it
won't go below 68 bytes.  Why is that


Probably because that's the tcpdump default.


and can it be changed to go lower?
Yes - 68 might be tcpdump's default when built without IPv6 support (96 is the default when it's built with IPv6 support), but you *can* set it shorter with the "-s" flag in tcpdump, so Ethereal and Tethereal (which default to 65535) should also let you set it lower.