Increase the Apache ConnectionsToQueuePerChild setting
Edit the httpd.conf file, increasing the value for "ConnectionsToQueuePerChild" from '500' to '3000'. Restart the Symantec Endpoint Protection Launcher service and Symantec Endpoint Protection Manager Web service after making these changes.
Decrease the TcpTimedWaitDelay registry value
Before proceeding, make a backup of your registry, then add or reduce the following values: