You can configure Symantec Protection Engine to use the RPC protocol to interface with appropriate clients. To use the RPC protocol, Symantec Protection Engine must be installed on a computer that is running Windows 2008 Server or Windows 2012 Server. It must also be located in the same domain as the RPC clients for which it provides scanning and repair services. A single protection engine can support multiple RPC clients. For sites with larger scan volumes, multiple protection engines also can be used to support one or more RPC clients.
A connection is maintained between each RPC client and Symantec Protection Engine. Symantec Protection Engine monitors the connection with each RPC client by checking the connection at a configured time interval. If Symantec Protection Engine determines that the connection is not active, it tries to reconnect. (You can configure the number of times that Symantec Protection Engine tries to reestablish the connection.) Symantec Protection Engine stops checking the connection with the RPC client when it reaches the maximum number of tries. Symantec Protection Engine resumes trying connections when the protection engine service restarts.