We would require Captive portal Exception for Specific Destination . Reason behind this is Mcfaee agents are not communicating with Mcafee EPO server without Logging to Captive Portal . The mcafee agent uses port 80 and 443 for server to client communication .
Scenario - Mcafee EPO server is in 10.254.48.0 network and Mcafee Agents are in 10.254.76.0 network . Agents uses port 80 and 443 . But unless enduser logs in to the Barracuda Captive portal ,mcafee agent to server communication is not possible .
Since all the users in the organization does not use internet every day ,they dont login to Captive portal . So the mcafee Antivirus is not updated till they login to captive portal .
An ticket has been raised for the same issue - Ticket ID #02973268