Thanks for the links.

I'm trying to learn NetFilter harder now.
I just realized how efficient chain processing is,
compare to the linear processing of IP Filter.

Hmm just one little ask. Consider this command :

$IPTABLES -t nat -A PREROUTING -p udp -d $EXT_IP \
   --dport 10000:20000 -j DNAT --to $INT_IP:10000-20000
           ^^^^^^^^^^^                      ^^^^^^^^^^^
Can you use the same syntax for the port range (marked with ^^^^) ?
I want to make a bash script, but I can't simply
assign one variable like this.

OPEN_PORT=10000-20000
$IPTABLES -t nat -A PREROUTING -p udp -d $EXT_IP \
   --dport $OPEN_PORT -j DNAT --to $INT_IP:$OPEN_PORT

Thanks very much for your great job

Regards
Eko


On Tue, 12 Mar 2002, Tom Eastep wrote:

> You might want to take a look at Shorewall (http://www.shorewall.net)
> -- It makes iptables a lot easier to use.



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