Excellent documentation explains each proxy configuration.
But the lack of remote configuration capabilities and the inability to work with more than two-adapter configurations make this product most suitable for small networks. AltaVista's DNS and SMTP proxies have the most to offer, but its HTTP proxy is missing some minor features. An included SMTP mail proxy protects SMTP mail hubs on the internal network. You can also check user names and passwords against a Windows NT domain, or authenticate users with authentication devices such as CryptoCards. Beyond the basic services, AltaVista includes a RealAudio proxy for streaming audio that works with both TCP and UDP RealAudio sessions on port 7070.