Trilent FTP Proxy
This firewall-friendly FTP proxy allows multiple computers on your network to share Internet access via FTP in a secureenvironment... In a reverse-proxy mode it makes internal FTP servers on afirewall-protected private network accessible from the Internet, so users located beyond the firewall can transfer files to and from the network... It enhances network security by offsetting known vulnerabilities of the protocol and offering full control over every FTP connection...