From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jesse Brandeburg <jesse.brandeburg@intel.com>
Subject: Re: My e1000e GBE card is eating all port 623 pks
Date: Tue, 24 Apr 2012 14:51:28 -0700
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To: Joakim Tjernlund <joakim.tjernlund@transmode.se>
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On Sat, 21 Apr 2012 15:31:09 +0200
Joakim Tjernlund <joakim.tjernlund@transmode.se> wrote:
 
> Looks like port 623 is some mgmt protocol and our e1000e boards are eating these
> pkgs and this trips NIS, finger and yptest hangs for a long time before timing out and
> moving on.
> 
> Is there a way to tell the network stack not to eat port 623 pkgs or
> have NIS not to use port 623?

I think you might be looking for something like portreserve 
(see man portreserve)

Jesse