You can connect your laptop wireless following these instructions.

The wireless network for laptops serves all the University, therefore does not have "csd.uoc.gr" as default domain . The machines of the Department should therefore be addressed to with their complete name. E.g.: 
- the putty session "oneiro" becomes "oneiro.csd.uoc.gr" 
- the printer \\didnt\laser208 becomes \\didnt.csd.uoc.gr\laser208 
- the home directory z: \\didnt\users\... becomes \\didnt.csd.uoc.gr\users\... 
- the mail server mailhost becomes mailhost.csd.uoc.gr
and so forth.