From mboxrd@z Thu Jan  1 00:00:00 1970
From: Murugavel Thiruvengadam <tmurugavel@gmail.com>
Subject: Mangle
Date: Mon, 19 Jul 2004 16:12:15 +0530
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we have few clients connected in LInux  firewall

         switch ---- firewall--------internet
           |          |              |
200pcs |       pvtip           pubip

 all  --  *      *       0.0.0.0/0            0.0.0.0/0          
SMANG --to-ip  <PUBLIC IP>

-A FORDNS -j SMANG --to-ip PUBLIC Ip

while sending a request to DNS we are using (mangle.) client's source 
port  . the same port we are using to send a request to dns. while
coming back.  assume that 3 person used the same port. DNS return
traffice not going to respective client. can anyone please advise.

it was working fine with nat. we are right now using mangle

Regards
TM