Technical details are off...
Hmm... At the risk of sounding like an arrogant asshole, I'm going to make some recommendations as far as some of the details go.
First, having "your" IP address end with 912 is incorrect; no legitimate OS would accept anything outside of the range 1-254. I know that dialog comes up afterwards, but it would have never been accepted as an IP in the first place.
Second, I disagree with having the Admin's IP address be something unreserved. Use something from this page: http://www.nthelp.com/40/ip.htm.
Third, why would the FBI care if someone was looking at server logs? It should say that you were looking at the DoD's logs, or something. Also, why would the admin be from the UK and then inform the FBI?
Fourth, there are no file browsers with a messaging interface in the bottom panel that I'm aware of. What would make more sense here would be to open a terminal, than start a talk session, or use the write command back and forth.
Last thing I noticed right off the bat was the use of a Windows sound when the "Invalid IP" dialog comes up. In Linux, I rarely if ever use Gnome or KDE (so maybe that -is- the sound they use), but it would make more sense to use one of the sounds from those desktop managers.
So yes, I really shouldn't be so picky, but if you're going to make a hacking game and base it on Linux, it seems like you should really get some of those technical details down. Other than that, this looks like the opening to a fun game.