btw on near every server moon portal is turned off as it eats the chunk & then starts working out to the next chunks, in short eating servers is not really a good idea, not even eating a single player game would be advised, its removed in later versions of portal gun I beleave.
should you wish to try it do so in a new map & spawn in a portal gun, that way if its still in the pack version you use you will not destroy your map/items/world, from what I remember it was dramatic.