Hi, what is the recommended way to block network for examinations? Ok, I'll put the examination workstations under the netblock NIS group. But I still have to deal with squid. Do I have to switch it off completely? Is there any ability to have a simple deny list of the examination workstation loaded into squid.conf? TIA Regards Giorgio -- Giorgio Pioda - Sysadmin SPSE-Tenero Cell +41 79 629 20 63 Uff. +41 91 735 62 48