Forwarder

Forwarder is a robust, production-ready MITM (Man-In-The-Middle) proxy equipped with PAC (Proxy Auto-Configuration) support. Primarily designed for debugging, intercepting, and manipulating HTTP traffic, it stands out as a core component in Sauce Labs Sauce Connect Proxy.

The idea behind the tool is to provide a versatile solution for debugging, intercepting, and manipulating HTTP traffic. The installation process is straightforward, with platform-specific instructions or the option to use a Docker image. The interface, although console-based, is intuitive and user-friendly, catering to both novices and experienced users.

Moreover, it supports Proxy Auto-Configuration (PAC) files, enabling you to define proxy behavior dynamically based on URL patterns. You will be happy to learn that this flexibility extends to custom DNS server configurations.

For those requiring additional security, the utility supports augmenting requests and responses with headers and basic authentication for both websites and proxies. The advantage is that you can inject additional HTTP headers into the communication between clients and servers, adding a layer of customization and security to the transmitted data.

You can seamlessly proxy various protocols, including HTTP, HTTPS, WebSockets, Server Sent Events (SSE), and generic TCP. The broad compatibility ensures that the app is suitable for a myriad of scenarios, making it a go-to solution for users requiring flexibility and adaptability in their proxy setup.

The supports upstream HTTP(S) and SOCKS5 proxies, allowing you to configure your preferred proxy settings. Notably, it takes security seriously with its Man-in-the-Middle (MITM) support for HTTPS traffic. The feature enables the interception and examination of encrypted HTTPS communications, a crucial capability for debugging, intercepting, and manipulating secure traffic

Forwarder combines security, flexibility, and ease of use, making it an ideal choice for users seeking a reliable and customizable proxy solution on the command line.