Thread: Need Networking Basics Help

well , have set server , 60 local computers @ our college.there guest account on 60 systems(all of these on same network) in lab , user accounts on server 1 can ssh server.
having been facing problems off late , use bit of in following:

1)proxying: net provided server lab.it allowed ssh hostels upload files people started using socks server , stealing bandwidth.
after bit of research set allowtcpforwarding no ,but people started running tiny proxy in accounts how stop (i don't want delete files manually have open home , break privacy)?

2)local ssh: during lab hours when systems engaged, users start mischeif ssh 'ing other local systems , kill 'ing processes , ejecting drives.how block ssh among local systems , allow ssh server?

3)when user logged in server through terminal able browse through file system though cannot edit except home folder barge other users privacy ain't how can restricted?

4)is there way give restricted sudo access(i.e install harmless software kate gedit etc)on local machine(the 60 systems) users liking.......i dont idea of installing softwares on systems....
have described problems suggest better solutions if any
please took lot of time type out atleast bump thread .....

guyz need here

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