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3proxy tiny free proxy server

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Universal freeware proxy server with HTTP, HTTPS, SOCKS v4, SOCKS v4a, SOCKS v5, FTP, POP3, UDP and TCP portmapping, access control, bandwith control, traffic limitation and accounting based on username, client IP, target IP, day time, day of week, etc.

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  • HTTP/1.1 Proxy with keep-alive client and server support, transparent proxy support.
  • Anonymous and random client emulation HTTP proxy mode
  • FTP over HTTP support.
  • DNS caching with built-in resolver
  • HTTPS (CONNECT) proxy
  • SOCKSv4/4.5 Proxy
  • SOCKSv5 Proxy
  • UDP and bind support for SOCKSv5 (fully compatible with SocksCAP/FreeCAP for UDP)
  • Transparent SOCKS redirection for HTTP, POP3, FTP, SMTP, ICQ
  • POP3 Proxy
  • FTP proxy
  • DNS proxy
  • SMTP proxy
  • TCP port mapper
  • UDP port mapper
  • ICQ/AOL proxy
  • MSN proxy
  • Web administration and statistics
  • Plugins interface for functionality extension
  • Native application (not ported) for Windows / Linux / Unix
  • Parent proxy support for any type of incoming connection
  • Username/password authentication for parent proxy(s)
  • HTTPS/SOCKS4/SOCKS5 and redirection parent support
  • Random parent selection
  • Chain building (multihop proxing)
  • Load balancing between few network links
  • turnable log format compatible with any log parser
  • stdout / syslof / logfile / ODBC logging
  • log file rotation (hourly, daily, weekly, monthly)
  • automatic log file comperssion with external archiver (for files)
  • automatic removal of older log files
  • Character filtering for log files
  • ACL-driven (user/source/destination/protocol/weekday/daytime or combined) bandwith limitation for incoming and outgoing trafic.
  • ACL-driven (user/source/destination/protocol/weekday/daytime or combined) traffic limitation per day, week or month for incoming and outgoing traffic
  • Access control by username, source IP, destination IP, destination port and destination action (POST, PUT, GET, etc), weekday and daytime.
  • Access control by username/password for SOCKSv5 and HTTP/HTTPS/FTP
  • Cleartext or encrypted (crypt/MD5 or NT) passwords.
  • Connection redirection
  • Access control by requested action (CONNECT/BIND, HTTP GET/POST/PUT/HEAD/OTHER).
  • NTLM (v1 only) authentication for HTTP proxy access
  • Regular expression filtering and substitution (with PCRE) via PCREPlugin
  • Authentication with Windows username/password (cleartext only!)
  • Runs as a service or console application under Windows / Linux / Unix
  • Known to work in Windows 98/NT/2000 (lite version) Windows 2003/2008/2012/XP/Vista/7/8 (32 bit and 64 bit versions)
  • Known to work in FreeBSD/i386, NetBSD/i386, OpenBSD/i386, Linux/i386, Linux/PPC, Linux/Alpha, Linux/arm Mac OS X/PPC, Solaris 10/i386.


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Additional Project Details


English, Russian

Intended Audience

Advanced End Users, System Administrators, Telecommunications Industry

User Interface

Non-interactive (Daemon), Plugins, Web-based

Programming Language



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