From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ralf <rm@amitrader.com>
Subject: Error when adding an entry to mangle/PREROUTING
Date: Mon, 09 Feb 2009 21:08:20 +0100
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The following command brings an error ("iptables: Invalid argument"):

   $IPTABLES -t mangle -A PREROUTING -p tcp --dport 9999 -j REJECT

What's wrong here?