Hi, on Jessie server/ws-client setup, for some obscure reasons activating the netblock and simultaneoulsy switching of squid3 still allows the pupils to use iceweasel for outgoing traffic. Instead of this, chromium get blocked correctly. I had to quick uninstall iceweasel/firefox-esr just before practical examinations. Regards -- Giorgio Pioda - Sysadmin SPSE-Tenero Cell +41 79 629 20 63 Tel +41 58 468 62 48