WinProxy by Lan-Projekt

WinProxy is the world-first proxy server and a firewall with integrated mail server for Windows 95/98/ME/NT/2000/XP. WinProxy allows you to connect your entire local network to the Internet, through one (dynamic) IP address. New version WinProxy 1.5.1 brings protection against mail server abuse, time intervals when dial-up is allowed, three levels of mail logging, improved cache performance, better arranged administration interface, UDP ports mapping and extended maximum URL length.