ActiveSync uses TCP/IP protocol for communication. Firewall applications
tend to block the ports that are required by ActiveSync for communication
purpose. For more information about the ports ---
You will need to configure the firewall application you are using to allow
ActiveSync to access the required ports. I don't use McAfee so I don't have
the exact steps but I think you would get the list of applications by doing
1. Right-click the McAfee icon.
2. Click Personal Firewall.
3. Click Internet Applications.
4. Scroll through the list and make note of applications that have been
blocked and grant outbound access to ActiveSync software applications.
If you are using the Windows XP SP2 firewall, then refer ---
Also perform a soft reset before attempting to synchronize.