I had similar problems. I was unable to log the packages from a email client
to the SMTP server. I saw nothing on the log, but the mail was sendet and
received by the other client.
Thomas
----- Original Message -----
From: Rui Prior <[EMAIL PROTECTED]>
To: linux-net <[EMAIL PROTECTED]>
Sent: Thursday, June 15, 2000 8:42 PM
Subject: tcpdump not catching all datagrams
> Under what circumstances would tcpdump not catch all UDP datagrams passing
> through a linux box configures as a router?
> I was seeing more packets reach the destination than were caught by
tcpdump
> on the router, so I installed two tcpdump processes, one for the incoming
> interface and another for the outgoing interface, and even these two had
> different logs, with the outgoing one sometimes showing more packets than
> the incoming, which is obviously impossible.
> Any clue on what's wrong?
> (BTW, the interfaces are atmXX, i.e., classical IP over ATM).
>
> Rui Prior
>
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