We are an educational company running arround 500 users (Windows XP) using Blue Coat SG510 for HTTP and HTTPs trffic. The problem is that some websites, like facebook start loading on the client machines and then hang or restart loading. While sniffing the input and the output traffic of the BlueCoat I found on the external interface an HTTP Retransmit comming after the HTTP Get. While on the input interface HTTP requests are comming normaly (No HTTP retransmit).
Is there any configuration or upgrade that should be done in order to prevent HTTP Retransmit from being sent.