Aeolos

It's cobblestone, not stone.

Knowing school computers (at least when I was at school) they were pretty crap systems - you may be expending a lot of effort for nothing. Is the web filter blocking all external websites or just a few (like minecraft.net)?

Decaying due to lack of logs?

Depends where you go I guess, my ISP hosts a tekkit server and so far there has not been any griefing whatsoever. I'm guessing the whitelisting process is working pretty well.