Open-source alternatives to Tproxy

This project is a multi-protocol API simulation and mocking system designed to replace external dependencies during development and testing. It provides an API mocking server, a network traffic proxy, and specialized simulators for language model services and identity providers. The system distinguishes itself through deep AI simulation capabilities, including the emulation of language model providers and Model Context Protocol servers using JSON-RPC 2.0. It supports multi-turn conversational logic, state tracking for AI chat APIs, and the visualization of agent execution through call graphs

Mitmproxy is an interactive, programmable network proxy engine designed for traffic analysis and protocol manipulation. It functions as a gateway that intercepts, inspects, and modifies network traffic in real-time, supporting HTTP, HTTPS, WebSocket, DNS, and generic TCP or UDP streams. By acting as a trusted certificate authority, the proxy can dynamically generate and sign certificates to decrypt and analyze secure TLS-encrypted connections. The project distinguishes itself through a highly extensible, event-driven architecture that allows users to automate traffic transformation using cust

Zapret is a deep packet inspection bypass tool and packet manipulation framework designed to circumvent network censorship. It operates as a transparent network proxy and TCP traffic obfuscator that modifies packets to deceive network inspection systems. The project distinguishes itself through advanced desynchronization strategies, including the modification of TLS client hello handshakes and the use of fake packet injection. It utilizes a combination of TCP stream segmentation, sequence overlapping, and TTL adjustment to hide prohibited requests from firewalls while ensuring the destination

dae is a high-performance Linux network tool that functions as an eBPF transparent proxy. It intercepts and redirects packets at the kernel level to route internet traffic based on domains, IP addresses, and process names. The project distinguishes itself by modifying TLS handshakes to simulate browser signatures, which prevents server-side detection of proxy traffic. It also implements a full-cone network address translation gateway to maintain stable bidirectional connections and utilizes a latency-based node selector to automatically route traffic through the fastest available proxy nodes.

This project is a proxy server designed to intercept and modify HTTP and HTTPS traffic for Netease Cloud Music. It functions as network middleware to restore playback for songs and albums restricted by geographic regions and to unlock premium account features, such as high-fidelity audio. The server utilizes header-based privilege injection to spoof premium status and employs conditional content redirection to route requests for unavailable media to alternative source providers. It also incorporates upstream proxy routing and IP parameters to bypass regional access restrictions. Additional c

Hetty is an HTTP intercepting proxy and web security research toolkit used to capture, inspect, and modify traffic between a browser and a server. It functions as an HTTP request editor for creating and replaying manual requests to test server behavior and as a project-based traffic logger that isolates network logs across different security research engagements. The tool provides a request-response interception loop that pauses outgoing requests and incoming responses in transit, allowing for manual editing or cancellation. It includes a manual request replay engine to construct and transmit

Toxiproxy is a framework designed for chaos engineering and network resilience testing. It functions as a programmable TCP proxy that intercepts and routes data streams between clients and servers, allowing developers to simulate unstable network conditions such as latency, bandwidth throttling, and connection failures. The tool provides a control plane that enables the dynamic manipulation of network conditions on active connections in real time. By integrating into automated test suites, it allows for the programmatic injection of faults to validate how distributed systems and microservices

Suricata is an open-source network intrusion detection and prevention engine that analyzes live network traffic in real-time to identify and alert on malicious activity. It operates as a rule-based threat detection system, matching traffic against user-defined signatures to detect known attack patterns and policy violations, and can be placed inline to actively block malicious packets before they reach their target. The engine inspects a wide range of application-layer protocols including HTTP, DNS, TLS, SMB, and MQTT, and supports high-performance packet capture through specialized hardware a

spy-debugger is an HTTP proxy debugging tool designed for intercepting and analyzing network traffic from mobile devices, WebViews, and mobile browsers. It functions as a network packet capture tool and a remote browser inspector, allowing users to monitor HTTP and HTTPS requests wirelessly without the need for USB cables. The project distinguishes itself by using script injection to enable remote debugging. It injects JavaScript into HTTP response bodies, providing the ability to inspect HTML and CSS elements and perform live page content editing directly on the mobile screen. Additionally,

Netfox is an iOS and macOS network debugging library designed to intercept and monitor HTTP traffic. It functions as an in-app HTTP traffic inspector that captures request headers and response bodies for real-time network analysis. The tool provides a network performance monitor to calculate response times and data sizes, as well as a network log exporter for sharing captured request and response data via email. The project covers network analysis capabilities including traffic filtering to exclude specific URLs, request body capture, and a debug interface that can be toggled via programmati

SocialFish is a credential harvesting tool and phishing framework designed to intercept usernames, passwords, and two-factor authentication codes through deceptive web pages. It functions as a social engineering platform and information gathering tool used to collect target data and system information for security research and penetration testing. The system utilizes a reverse proxy to tunnel network traffic and capture real-time HTTP requests and session cookies. It features a live operator panel for intercepting one-time passwords and employs browser-based cloning to replicate authenticatio

Wireshark is a network protocol analyzer and traffic inspector used for capturing and inspecting network traffic. It functions as a packet capture tool that intercepts live data from network interfaces and a TCP/IP dissector that decodes network protocol layers to translate raw binary packets into human-readable fields. The system provides capabilities for protocol stream reconstruction, grouping related packets into cohesive conversations between endpoints. It also operates as a packet file converter, allowing for the reading, modification, and conversion of network capture files across vari

Proxypin is a cross-platform HTTP and HTTPS proxy debugger designed to capture, inspect, and modify network traffic. It functions as a man-in-the-middle interceptor, allowing developers to analyze application data flows and validate network communication during development and testing. The tool distinguishes itself through its focus on mobile and remote device integration, utilizing QR-code-based configuration synchronization to simplify the setup of proxy settings and security certificates. It includes an event-driven scripting engine that enables programmatic manipulation of requests and re

V2ray-web-manager is a centralized management platform designed for coordinating multiple decentralized proxy nodes and administering user accounts from a single web interface. It combines proxy server cluster management with automated bandwidth regulation, user lifecycle administration, and subscription-driven access controls. The platform provides comprehensive billing and commercial transaction management, featuring financial ledgers, product pricing catalogues, and automated online payment processing integrations. It includes dynamic connection link generation for onboarding external dev

Sozu is a high-performance, memory-safe reverse proxy and load balancer built in Rust. It is designed to manage HTTP, TCP, and UDP traffic through a multi-process architecture that leverages isolated worker processes to ensure fault tolerance and efficient resource utilization across multi-core hardware. The project distinguishes itself through a focus on continuous availability and dynamic control. It features a unique binary hot-reloading mechanism and a Unix-socket-based control plane, allowing administrators to update proxy configurations, modify listener settings, and even replace the pr

GoReplay is a network traffic recording and replay tool used to capture live HTTP and binary protocol requests. It functions as a traffic shadowing proxy that duplicates incoming network requests to test environments and a utility for recording traffic to local or cloud storage for later analysis and playback. The system is capable of processing non-textual data formats, such as Thrift and Protocol Buffers, allowing for the capture and replay of specialized application-to-application communication. The tool supports live traffic capture and asynchronous duplication to validate infrastructure

gost is a multi-protocol proxy tunnel and secure tunneling server designed to route network traffic through encrypted connections. It functions as a traffic obfuscation gateway and a transparent proxy server capable of intercepting TCP and UDP traffic at the IP level. The project also includes a virtual network interface manager for creating TUN and TAP devices to intercept operating system packets. The system distinguishes itself through a chain-based request routing model, allowing traffic to pass through an ordered sequence of proxy nodes. It provides extensive transport-layer encapsulatio

CLIProxyAPI is a command-line utility designed for routing, inspecting, and managing API network traffic directly from the terminal. It functions as a local proxy server that intercepts outgoing system-level requests, allowing users to monitor and troubleshoot connectivity without the need for external proxy software or browser-based tools. The tool distinguishes itself by providing a unified workflow for managing authentication credentials and connection settings through environment-based injection. It utilizes a middleware request pipeline that enables the real-time inspection and modificat

This project is a comprehensive educational guide and framework for building web scrapers using Python. It provides a course-based approach to data extraction, combining a Python crawler framework with tutorials on web reverse engineering and network traffic analysis. The project distinguishes itself by covering advanced extraction challenges, including the decryption of obfuscated JavaScript and the bypass of anti-scraping measures. It specifically addresses mobile application scraping through the simulation of user interactions and the interception of network traffic. The capability surfac

Mosn is a multi-protocol network proxy designed for cloud-native service meshes, API gateway management, and distributed load balancing. It forwards layer four and layer seven traffic across diverse network protocols to ensure interoperability between distributed cloud components. The project is distinguished by its ability to perform zero-downtime proxy updates, replacing the running binary while maintaining existing network connections. It further supports dynamic proxy extension, allowing custom request processing logic to be added via external plugins or compiled Go modules without restar

libhv is a high-performance C/C++ network library and event-driven I/O framework used to build TCP, UDP, SSL, HTTP, WebSocket, and MQTT clients and servers. It provides a non-blocking event loop for managing network sockets, timers, and system signals across multiple threads. The project is distinguished by its integrated support for specialized network roles, including a full HTTP web server with RESTful routing and middleware, an MQTT messaging client for IoT communication, and the ability to implement SOCKS5 and HTTP proxies. It also features a reliable UDP implementation to ensure ordered

Ethical-Hacking-Labs is a comprehensive cybersecurity training curriculum and lab suite designed for learning penetration testing, network analysis, and offensive security techniques. It provides a structured environment for practicing the full attack lifecycle, from initial reconnaissance and scanning to exploitation and post-compromise analysis. The project provides instructional materials and guided exercises that cover specific technical domains, including open source intelligence research and network security courseware. It includes a practical workbook for identifying system vulnerabili

Zeek is a network analysis framework and security monitoring tool that transforms raw network packets into high-level semantic logs. It functions as an application protocol analyzer and network intrusion detection system designed to extract meaning from network traffic and monitor for malicious activity. The system focuses on archiving network activity and maintaining historical records of application-layer state for forensic investigation and auditing. It utilizes a combination of modular protocol analyzers and customizable detection policies to perform deep semantic analysis of numerous app

goflyway is an encrypted traffic relay and HTTP TCP tunneling proxy. It encapsulates TCP traffic within HTTP POST or WebSocket requests to bypass restrictive firewalls and network proxies. The system provides a SOCKS5 proxy server that routes traffic via a WebSocket relay and includes a UDP over TCP tunnel to enable transport across networks that block UDP traffic. It also functions as a TCP traffic interceptor for capturing and inspecting data passing through relayed connections. Capabilities cover network tunneling and traffic proxying through various transport protocols, including HTTP PO

EQGRP is a remote access trojan framework and post-exploitation toolkit. It provides a centralized command and control infrastructure for deploying persistent implants and managing remote agents across diverse operating systems. The project includes tools for digital forensic evasion, such as modifying system logs and filesystem timestamps to remove execution traces. It features a network interception system for capturing and reconstructing data streams by hooking into the system root, as well as exploits designed for kernel privilege escalation to elevate process permissions to administrativ

nghttp2 is a suite of low-level C libraries and tools designed for implementing the HTTP/2 protocol. It provides a memory-efficient implementation of the protocol's core logic, including framing, stream multiplexing, and flow control. The project includes a dedicated library for HPACK header compression and decompression to reduce network bandwidth. It also provides a toolset for analyzing network traffic and benchmarking server performance, including throughput and latency measurements. Its broader capabilities cover protocol implementation and traffic management, including ALPN connection