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Wargame Idea 1:
2 linux boxes
1st box: you have access to the box at the start of the mission using SSH session.
On the box are several files which contain (when arranged correctly) a secret message.
the person must decode the message and then move on to hack the 2nd box.
2nd box: running local webserver that has clues to a password on the website.
the person must get the password to the root admin on the pc.
site idea: something to do with the admins love of dogs, with the password being
dog2010 or something.
this allows root access to the poorly secured server.
Completion is achieved when the person has gained root access and saved a file
as root with the message in it, also leaving a copy of his or her name with the message
The message must be saved in the root directory.
Simple and easy to setup were my thoughts when I first came up with this, but not too easy...Wargame Idea 1:
2 linux boxes
1st box: you have access to the box at the start of the mission using SSH session.
On the box are several files which contain (when arranged correctly) a secret message.
the person must decode the message and then move on to hack the 2nd box.
2nd box: running local webserver that has clues to a password on the website.
the person must get the password to the root admin on the pc.
site idea: something to do with the admins love of dogs, with the password being
dog2010 or something.
this allows root access to the poorly secured server.
Completion is achieved when the person has gained root access and saved a file
as root with the message in it, also leaving a copy of his or her name with the message
The message must be saved in the root directory.
Simple yet fun :) This could easily be setup on hamachi I think. Virtualbox it then install hamachi on both boxes and connect to the same network. The people taking part would then connect and attempt it.
I wouldn't be worried about the OS if the 'attackers' are accessing the server via SSH gnome or KDE won't matter (just incase you were thinking about that lol). Memory Shouldn't be effected that much either unless someone fucks about with it. I'd try ubuntu like you said and if you want a webserver maybe lighttpd or apache. Depends what you feel more comfy using.
CLI as in configure everything using shell? Yeah, check out the readme. What I mean about the SSH etc is if you want the server to be exploitable, then install hamachi on the box and let others connect their pc's to the hamachi network and then they can portscan the vuln system or whatever based on the mission you set for them.