Open Source C Proxy Servers

UFTP is an encrypted multicast file transfer program, designed to securely, reliably, and efficiently transfer files to multiple receivers simultaneously. This is useful for distributing large files to a large number of receivers, and is especially useful for data distribution over a satellite link (with two way communication), where the inherent delay makes any TCP based communication highly inefficient. The multicast encryption scheme is based on TLS with extensions to allow multiple receivers to share a common key. UFTP also has the capability to communicate over disjoint networks separated by one or more firewalls (NAT traversal) and without full end-to-end multicast capability (multicast tunneling) through the use of a UFTP proxy server. These proxies also provide scalability by aggregating responses from a group of receivers.

c-icap is an implementation of an ICAP server. It can be used with HTTP proxies that support the ICAP protocol such as the Squid 3.x HTTP proxy server to implement content adaptation/filtering services.

This program allows you to use SSH, TELNET, VNC, FTP and any other Internet application from behind HTTP(HTTPS) and SOCKS(4/5) proxy servers. This "proxifier" provides proxy server support to any app.

ModSecurity is a web application firewall that can work either embedded or as a reverse proxy. It provides protection from a range of attacks against web applications and allows for HTTP traffic monitoring, logging and real-time analysis.

RELIANOID is an open core (Debian GNU/Linux based) Application Delivery Controller (ADC) with advanced load balancing features such as Network Load Balancer, Application Load Balancer with SSL offloading, Advance Network Configuration including Virtual Interfaces, VLANs, Bonding with link aggregation, IPv4/IPv6, advanced routing, stateless cluster, web GUI, JSON API and much more! Enterprise Edition Load Balancer is available with extra features such as global service load balancing (gslb), application security including web application firewall (WAF), blacklists, Realtime Blackhole Lists (DNSBL), DDoS protection, stateful clustering, SNMP monitoring, email and SNMP notifications, RBAC, VPN support, and the best Support directly from an expert Team.

mpg321 is a completely Free drop-in replacement for mpg123. It has been designed to work as a drop-in replacement for mpg123, for the use of front ends, shell scripts, etc. It does all mp3 decoding using the high-quality integer-only MAD library.

The xfrpc project is an implementation of frp client written in C language for OpenWRT and IOT system. The main motivation of this project is to provide a lightweight solution for devices with limited resources such as OpenWRT devices which often have limited ROM and RAM space. The project aims to provide a frp client that uses less space and memory than other available options.

OpenChange is a portable Open Source implementation of Microsoft Exchange server and Exchange protocols. It provides a complete solution to interoperate with Microsoft Outlook clients or Microsoft Exchange servers. OpenChange client-side library is used in existing messaging clients and is the solution in new projects to communicate natively with Microsoft Exchange and Exchange-compatible servers. OpenChange server is a transparent Microsoft Exchange server replacement using native Exchange protocols and does not require any plugin installation in Outlook.

A Free SOCKS proxy server for Linux, macos and FreeBSD

Ziproxy is forwarding HTTP proxy server aimed to speed up low-bandwidth connections. It does so by gzipping HTML and using lossy compression of GIF, PNG and JPEG pictures. Ziproxy also offers JPEG 2000 support, transparent proxying and more.

Anonymous proxy server. Supports http, https, socks. Can be used as a normal proxy or as a p2p anonymous proxy. Web based drag and drop access configuration. Works with windows, linux. IE, firefox, etc. Visit http://anonproxyserver.sf.net/ for more info.

P3Scan is a fully transparent scanning proxy-server for email clients. It provides scanning of incoming/outgoing email messages for Virus''s, Worms, Trojans, Spam, and harmfull attachments. It can also parse messages for web-bugs.

YAPH - Yet Another Proxy Hunter - intended for validation of any given SOCKS 4/5 or HTTP proxy server for compatibility with TCP tunneling features.

Proxy Server

httpdbg is an HTTP proxy server which is single-threaded and prints every HTTP request and response to a log file as well as to stdout. It effectively single-threads your browser, which can help in debugging race conditions.

TinyReversProxy is a lightweight reverse proxy especially designed for embedded systems. It has been written in C language in the ESECO SYSTEMS company which builds Web3.0 and Web4.0 appliances for the domains of security and risk protection.

Middleman is an advanced HTTP/1.1 proxy server with features designed to increase privacy and remove unwanted content.

It is a versatile DNS Proxy server with DNS firewall which filters DNS traffic between local computer and DNS servers with flexible rules, supports blocking by IP geography, caching, import/export rules into XML. With a click of a button acts as a DNS proxy (or DNS server), supports multiple client authentication methods, calculates statistics for DNS servers and proxy clients, supports load balancing between multiple upstream DNS servers.

BounceThis is an IRC proxy server written in C for Win32 that supports Identd, IP filtering, password protection, remote admin, and more!

CLara is a framework that enables you to access the computing power of many graphics processors in an IP-based network using a kind of Client/Proxy/Server model. Its programming interface conforms to the OpenCL 1.0 standard.

MSN ProxIRC is an IRC proxy (server) written in C++ which makes use of libMSN and OpenSSL. Whatever IRC server you are proxying, it shows virtual rooms to chat directly with your MSN contacts. Thread-safe and blazing fast.

Shweby is a new ICAP enabled proxy server. This proxy passes HTTP requests and responses through one or many ICAP servers in order to be modified in their way to the origin server or to the client.

dircproxy is a detachable IRC proxy server that keeps you on IRC logs private and channel messages while you are detached then when you reconnect, spools them to you as if you hadn't been away.

This project is a authentication plugin for the Squid proxy server that authenticates users against an ldapv3 server. It includes support for static and dynamic groups.

Absinth is a C++ Object-Oriented Multiprocess Multithreaded Proxy Server. Able to serve a great number of clients as a little LAN