[plug] UDP Forwadring

[Andrew Barbara]

This system has an ipchains firewall, can I put that iptables rule in without moving the firewall over to iptables?

Andrew Barbara,  MCP
MMT Networks Pty Ltd
http://www.mmtnetworks.com.au

>>> arkem at mornmist.2y.net 09/25/01 09:39am >>>
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On Tue, 25 Sep 2001 09:56, Andrew  Barbara wrote:
> Hi,
> What's the best way to forward UDP packets back and forth through a
> Linux box?  Im using redir for the TCP but as far as I know that
> only does TCP.
>
> Andrew Barbara,  MCP
> MMT Networks Pty Ltd
> http://www.mmtnetworks.com.au 

In linux 2.4 you can use the NAT table of iptables
eg.
iptables -t nat -A PREROUTING -p udp --source-port 4000 -j DNAT --to 
192.168.0.210:4000
or
iptables -t nat -A PREROUTING -p udp --source-port 4000 -j REDIRECT 
- --to-port 4005

and so-on and so-forwarth... There is a good NAT howto that comes 
with iptables (so if you've got iptables installed check for it in 
/usr/share/doc/iptables/ or similar).

Also I think ipchains from the 2.2 kernel also can do it.

Regards,
	Paul Chamberlain
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