How to open up a port?

I have installed Oleg's firmware on my Asus WL-500g Premium router. I've also installed ctorrent and YODCTCS Web Gui for administrating the torrents. The web gui uses port 18000 for access. This works fine when I sit at home but I would like to be able to access the web gui externally so I can start and administrate downloads when I'm not at home. So I figured I need to open up port 18000 for external traffic.

Now how can I accomplish this?

Any ideas? :)

Try to create this rule with iptables:

Code:

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iptables -I INPUT -m tcp -p tcp --dport 18000  -j ACCEPT

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eventually put it in /usr/local/sbin/post-firewall so it will be reinitialised in case the router is restarted, like this:

Code:

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echo "iptables -I INPUT -m tcp -p tcp --dport 18000  -j ACCEPT" >> /usr/local/sbin/post-firewall

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..and don`t forget to save it:

Code:

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flashfs save && flashfs commit && flashfs enable

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to save it.

Or try

Code:

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iptables -A INPUT -p tcp --dport 18000 -j ACCEPT

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It`s about the same thing.

Cheers.