NAC (Network Access Control) When authenticate Clients Ip address Range for Clients, many clients computers that working with Health state On line are blocking the traffic.

Dear all,

I use Windows Server 2008 Standart R2 with Symantec Endpoint Protection 12.1 installed in my environment, my clients computer have Symantec 12.1.100 with Windows XP and 7.

Yesterday I applied NAC solution in my Network environment. After applied many Clients computers , almost sixty per cent of my computers park are blocking the traffic.

The computers that are blocking show in the Symantec Endopint Protection Manager with the Health State OnLine, but I don´t know why computers blocking the traffic with Healh State on Line.

I need to know if exist some procedure to do, that synchronize the NAC policy with Clients that working well.

Why the NAC blocked  Clients that health is well ?

If some can help, I´m appreciate.