You need to know about the function and role of Symantec Protection Engine.
Symantec Protection Engine, formerly marketed as Symantec Scan Engine, is a carrier-class content-scanning engine. The scan engine features all of the key content-scanning technologies that are available in the complete line of Symantec enterprise security products. The scan engine provides content-scanning capabilities to any application on an IP network, regardless of platform. Any application can pass files to the scan engine for scanning. The scan engine accepts scan requests from the client applications that use the following protocols:
The scan engine native protocol
The Internet Content Adaptation Protocol (ICAP), version 1.0, as presented in RFC 3507 (April 2003)
A proprietary implementation of remote procedure call (RPC)
The Symantec Protection Engine software development kit (SDK) lets you develop custom integration. It supports version 1.0 of ICAP, as presented in RFC 3507 (April 2003).
Symantec Scan Engine is not designed to provide virus protection for the local file system on the computer on which it is installed. Symantec Technical support does not provide technical support for the third-party client application (connector product) that uses Symantec Protection Engine.
References For additional information, click a link for a product manual or Symantec documents related to Symantec Protection Engine.