Прокси какой?

tidy-proxy - A small http proxy which tidies html
tinyproxy - A lightweight, non-caching, optionally anonymizing http proxy
transproxy - Transparent Proxy Daemon for HTTP requests
privoxy - Privacy enhancing HTTP Proxy
polipo - caching web proxy
oops - caching HTTP proxy server written for performance
micro-proxy - really small HTTP/HTTPS proxy
ffproxy - A light and customizable http(s) proxy server with ipv6 support
bfilter - Simple web filtering proxy
anon-proxy - Proxy to surf the web anonymously
apache - versatile, high-performance HTTP server
squid - Internet Object Cache (WWW proxy cache)

Какие задачи стоят, какие цели преследуются?

он по умолчанию рабочий , там только acl слегка настроить надо ...

и http_port