Firewall/NAT

Hi there,

I've got a question for you. I've got my m0n0wall after my modem (the freebox) and I should be able to browse some interactiv contents on it and redirect a TV flow from it to my PC. But i can't
My freebox has got an adress of a kind : 212.27.38.253 and my LAn adress are 192.168.xxx.xxx
I wonder how do I have to NAT or to open on the firewall. I know that I have to open the 554TCP and some UDP but I don't know how to do it...
If anyone could help me...
I'm some kind of nub' so don't hesitate to explain longly.

thanks.

Maybe you should read some of the available documentation?

http://doc.m0n0.ch/handbook-single/

Thanks fredg,
I did try to read all this and I did apply that rules several times to open ports to get out af the LAN (by redirecting port for games for instance) But here is my problem, the modem seems to be out of my scope (212.27.38.253, i don't know all the techno behind.

So, if anyone knows how to do it...
Thanks.