Can you give more info? You don't know how to do it or did you do it but your ports are still closed?
If you don't know how to do it or not sure if you did it right, try to type your router and portforwarding in google and then you will find tutorials how to portforward with that router.
Well, what happens when they try to login, what kind of error do they get, can they see the character list? and don't forget/skip the adding ports to firewall/turning it off, ports will always be blocked if you don't do that.
?I don't know which router you use, so I'm not sure what you mean. But portforward both 7171 and 7172. 7171 to get to the character list and 7172 is to login from your character list ingame.
@updated,
What do you mean?