how do i change a port from closed to open?

[Special K]

please help the noob

 

[videotronic]

www.portforward.com

step by step instructions there..just look up your brand of router

 

[Special K]

cool thanks ...

i dont have a router but i figured out how to change it yesterday BUT i keep having to re-open the port as it wont stay open? i open it and then a few hours later its closed once again wtf ...