Wireless Access Point
Configuring the Wireless AP 209
Check Web Proxy (HTTP): Under Web Proxy Server, we suggest that you 
enter www.xirrus.com Port 4388 to make it obvious that HTTP traffic is 
being proxied in this way.
Figure 122. Specify Proxy Servers (Apple)
5. SSL Certificate: you must download and install the security certificate 
from your proxy server—Blue Coat or Netbox Blue. It must be installed 
on each of your client devices.