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Date:      Wed, 06 Jun 2012 14:31:24 -0400
From:      "Simon" <simon@optinet.com>
To:        "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org>
Subject:   Proper Port Forwarding
Message-ID:  <20120606183127.68447106566B@hub.freebsd.org>

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Hi,

Can someone suggest an alternative/proper way to port forward using ipfw. Right
now I have the following and some bad clients cause too many FIN_WAIT_2 state

fwd IP,PORT2 tcp from any to me dst-port PORT1 keep-state

This easily causes DoS for when too many FIN_WAIT_2 are created and IPFW
stops forwarding using the rule above because of "too many dynamic rules"

Thanks,
Simon





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