[Need help] Regarding method's of connecting domain and host.

[White Cuban]

so i got this server, which i want to hold my site(private ded server :p though doesn't matter :p)

i want it to hold the site in a way, that when i go to the site domain bla.com it will be bla.com and when i go to a url bla.com/forum/postnumber184390.php it will still be that, and not serverip/forum/postnumber184390.php

thank you.

(im not sure if this will somehow matter, but i only havve port 80 open, since its connected to Internet in place not in my control)