A system for detecting and eliminating viruses on a computer network includes a File Transfer Protocol (FTP) proxy server, for controlling the transfer of files and a Simple Mail Transfer Protocol (SMTP) proxy server for controlling the transfer of mail messages through the system. The FTP proxy server...http://www.google.co.uk/patents/US5623600?utm_source=gb-gplus-sharePatent US5623600 - Virus detection and removal apparatus for computer networks
