port change VBox for client out of my home

Hello
My Server iss running on Sun VBOX
I build it with this thread:
http://forum.ragezone.com/f452/beast...erface-636392/

now i have following problem

Intern the Network the Clients can join my server, but how can somebody join to the server, out of my home?
i installed no-ip

i think the problem is the port 80 on Vbox...
how can i change it?

Sry for my bad english, but in germany we have no good teachers =)

nobody can help?

please help me, that my friends can join the server

Use port forwarding for your router as described in this post:
http://forum.ragezone.com/f452/vbox-...ml#post5567504

it runs =)

now i have another question but i dont want to make a new thread

how can i set EXP rate