WAN Security

i am going to subscribe to a WAN that covers a great distance (the whole capital of Greece -Athens-)
and since there are going to be many members that can access my computer anytime i would like to secure my b0x, so i can prevent stupid attacks etc
i would like to know what would AO ppl do if they were in my place.
i have only decided the OS the b0x is going to run: Linux, dont ask me what distro, i dont know yet, maybe RH or Slackware

I don't know. I couldn't get my WAN working on my lMandrake Linux distro either :-|. I got my windows side up perfectly.

If anybody knows any good tuts to read, or is willing to write up a walkthrough for setting up a WAN on linux, do post. :)

SLACKWARE ROX THE WAN HOUSE!