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List:       linux-admin
Subject:    Problem with Port Forwarding using IPTables
From:       Ramasubramanian <rams () nmsworks ! co ! in>
Date:       2002-05-23 7:30:08
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Hello,

	I have specified rules to enable port forwarding . It works if the query
comes from systems in the same network. For queries coming from different
network it doesn't respond.
	The following are my rules.

	/sbin/iptables -A FORWARD -p udp -d 192.168.254.254 --dport 161 -j ACCEPT
	/sbin/iptables -t nat -A PREROUTING -p tcp -d 192.168.9.6 --dport
	161 -j DNAT --to-dest 192.168.254.254:161

	Though I have mentioned the source to be anywhere, the port
forwarding is happening only for queries coming from 192.168.9.0 network.
I have another set of network 192.168.25.0 from where the queries are not
answered. The systems in this network ( 192.168.25.0 ) are able to ping
the host 192.168.9.6.

	Any help is entertained.


Regards
Rams

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