ProxyChains

ProxyChains is a powerful UNIX tool that redirects TCP connections of dynamically linked programs through SOCKS4a/5 or HTTP proxies. It operates by hooking network-related libc functions using a preloaded DLL.

Key Features:

• Proxy Chaining: Supports chaining multiple proxies, mixing different types (SOCKS5, HTTP, SOCKS4) in a single chain.
• Dynamic Proxy Exclusion: Offers dynamic chaining that intelligently excludes dead proxies.
• Application Agnostic: Works with any TCP client application, including those without built-in proxy support (e.g., telnet).
• DNS Resolution: Provides DNS resolving through the proxy chain.
• Configuration Flexibility: Configuration file can be specified via command-line arguments or environment variables.

Use Cases:

• Circumventing restrictive firewalls and port filtering.
• Anonymizing network traffic.
• Testing security configurations through chained proxies.
• Proxifying network scanners like Nmap for port scanning through proxies.