* Navigate to the Firewall > App Control Advanced page. (In Gen5 TZ devices this page would be under Security Services > App Control Advanced) * Check the box under Enable App Control and click on Accept at the top of the page. * Under View Stye: Category, select IM * Click on the configure button to bring up the Edit App Control Category window. * Select Enable under Block * Select Enable under Log * Select All under Included Users/Groups * Click on OK to save the settings.
To block the web chat we would need to add the forbidden list on Content Filter with ” chatenabled.mail.google.com” for gtalk.