Open-source alternatives to Udp2raw

A Rust port of shadowsocks

dsvpn is a point-to-point virtual private network tool that establishes encrypted tunnels between two specific endpoints. It functions as a network driver utility that routes raw operating system traffic through a virtual interface for encapsulation and secure transmission. The project distinguishes itself by encapsulating IP packets within TCP streams, allowing secure connections to bypass restrictive network firewalls and filters that block non-standard protocols. It uses symmetric encryption with pre-shared secret keys to authenticate participants and protect data transmission. The softwa

Chisel is a network tunneling tool that facilitates secure communication by encapsulating TCP and UDP traffic within HTTP requests. It functions as a connection multiplexer, consolidating multiple logical network streams into a single persistent connection to improve throughput and reduce overhead. By leveraging standard web protocols, the system enables firewall traversal and provides a mechanism for remote port forwarding and proxying. The project distinguishes itself through its focus on resilient connectivity and granular access control. It maintains persistent network sessions across uns

CJDNS is a peer-to-peer VPN and cryptographic network overlay that implements an encrypted IPv6 mesh network. It functions as a distributed hash table router, utilizing a non-hierarchical XOR metric to route traffic across nodes without relying on a central authority or registry. The project distinguishes itself by tying network identity to cryptographic ownership, deriving unique IPv6 addresses from public keys. It ensures secure peer connectivity across NAT boundaries using public-key authentication, end-to-end packet encryption, and a handshake protocol that provides perfect forward secrec

Cloak is a set of censorship circumvention tools designed for secure proxy tunneling and internet traffic obfuscation. It focuses on bypassing restrictive firewalls and state surveillance by disguising proxy connections as standard web browsing. The project utilizes HTTP fingerprint masquerading to imitate common browser signatures and routes traffic through content delivery networks to mask the identity of the origin server. To further hide the server's purpose, it includes a mechanism to redirect unauthenticated connection requests to a third-party website. The system implements transport

Localtunnel is an HTTP tunneling service that exposes local development servers to the public internet. By creating secure tunnels with temporary public URLs, it allows developers to route incoming internet traffic directly to a web server running on a local machine. The service provides predictable or custom subdomains to facilitate remote collaboration and testing of local applications. It functions as a localhost proxy server, enabling users to receive and inspect external webhook payloads directly within a local environment during the development lifecycle. The platform manages traffic t

This project is a comprehensive technical documentation site and reference manual for configuring and deploying WireGuard VPN tunnels and interfaces. It serves as a guide for establishing encrypted network connections between peers using public key authentication to secure data traffic across untrusted networks. The documentation provides specific technical manuals for implementing NAT traversal solutions, including UDP hole punching and the use of bounce servers to connect peers behind restrictive firewalls. It also includes detailed guides on tunnel implementation and protocol references fo

n2n is a peer-to-peer VPN that creates an encrypted mesh network by establishing layer 2 overlay networks. It uses UDP tunneling to connect remote computers into a shared virtual local area network, allowing devices to communicate as if they were on the same physical Ethernet switch. The system utilizes a centralized signaling registry and federated coordination nodes to facilitate peer discovery and node registration. It implements NAT traversal through UDP hole punching and UPnP port mapping, while using supernode relay routing to ensure connectivity when symmetric NATs prevent direct peer-

shadowsocks-libev is an event-driven network daemon that provides an encrypted SOCKS5 proxy. It functions as a lightweight proxy server using a non-blocking event loop to route TCP and UDP traffic through encrypted tunnels to bypass network restrictions. The project implements a transparent proxy gateway capable of intercepting outbound packets at the network layer, allowing system traffic to be redirected through the encrypted tunnel without per-application configuration. It also includes a daemon process manager to control multiple proxy server instances as child processes via local communi

ShadowsocksR is a Python-based implementation of a SOCKS5 proxy server designed to tunnel network traffic through encrypted connections. It functions as an encrypted network tunnel that obfuscates internet traffic to circumvent network restrictions and firewalls. The project includes security hardening features to protect the proxy server from unauthorized access, specifically by blocking IP addresses that attempt brute force credential attacks. The server manages bidirectional TCP and UDP traffic and can be executed as a background system daemon to maintain persistent connectivity. It suppo

Firefly-proxy is a censorship circumvention proxy and network traffic obfuscator designed to bypass national firewalls and regional internet blocks. It functions as a SOCKS5 proxy server that routes traffic through obfuscated tunnels to provide secure web access. The project implements transport-layer obfuscation and TCP-stream encryption to mask network traffic patterns and evade detection by deep packet inspection systems. It utilizes remote peer tunneling to establish encrypted connections between local clients and foreign servers. The system supports general network traffic proxying via

REALITY is a censorship circumvention tool and network traffic obfuscator designed to bypass internet filters. It functions as a secure tunneling protocol that masks connection patterns and identity by mimicking the TLS handshakes of legitimate target websites. The system removes server-side TLS fingerprints to hide encrypted traffic from network monitoring tools and deep packet inspection. It employs a website mimicking proxy to present valid handshakes and forward traffic to destination servers, masquerading the connection as a legitimate site visit. The project incorporates a quantum-resi

This project is a privacy-focused VPN manager and WireGuard client application designed to establish encrypted tunnels that mask user IP addresses and activity. It focuses on maintaining anonymity through a system that supports account creation without personal identifying information. The application distinguishes itself with advanced privacy tools, including a multi-hop orchestrator for routing traffic through multiple sequential servers and a network traffic obfuscator that uses Shadowsocks, TCP, and QUIC to bypass deep packet inspection and censorship. It also implements quantum-resistant

Nebula is a scalable, decentralized overlay networking tool designed to create secure, encrypted peer-to-peer connections between distributed hosts. By utilizing a certificate-based identity authority, it enables the construction of private communication fabrics across disparate physical infrastructures, such as multiple cloud providers or on-premises data centers, without requiring central authentication servers. The project distinguishes itself through a zero-trust architecture that enforces granular, policy-driven firewall filtering based on certificate-derived group memberships. It facili

Hysteria is a cross-platform proxy tool designed to route network traffic over the QUIC protocol. It functions as a proxy server infrastructure that facilitates secure traffic tunneling, specifically targeting the circumvention of restrictive network firewalls and censorship. The software utilizes UDP-encapsulated traffic tunneling and cryptographic stream obfuscation to hide traffic patterns and bypass deep packet inspection. By employing custom congestion control algorithms, it dynamically adjusts transmission rates based on real-time network conditions and packet loss metrics to maintain c

MasterDnsVPN is a DNS tunneling VPN and network censorship bypass tool that encapsulates network traffic within DNS queries to circumvent restrictive firewalls. It functions as a secure tunneling protocol and SOCKS5 proxy server, allowing local application traffic to be routed through a secure tunnel to a remote destination. The project distinguishes itself through a DNS resolver load balancer that distributes traffic across multiple resolvers based on latency and packet loss scoring. It further secures and masks traffic using symmetric payload encryption—supporting ChaCha20, AES-GCM, and XOR

Weave is a multi-host container networking tool that connects containers running on different physical machines into a single virtual network. It creates a software-defined overlay network spanning multiple hosts, enabling containers to communicate directly with each other as if they were on the same local switch. The system provides automatic service discovery, resolving container names to network addresses across hosts without manual configuration. Traffic between containers on different hosts is secured through encrypted tunnels, preventing eavesdropping and tampering. Weave also includes

Oblivion Desktop is a proxy client desktop application and network privacy tool designed to manage encrypted network tunnels and routing rules. It serves as a proxy protocol manager that encrypts outgoing traffic and rotates IP addresses to hide user identity and location, primarily to bypass internet censorship and regional restrictions. The application provides a graphical interface for configuring multiple tunneling protocols, TUN interfaces, and PAC files to secure device network traffic. It includes capabilities for internet censorship circumvention and privacy proxy management, allowing

ShadowsocksR Proxy Client is a Windows network proxy manager designed to create encrypted tunnels to remote servers to bypass network restrictions. It functions as a Socks5 proxy client that routes system traffic through secure protocols for anonymity and censorship circumvention. The project provides a desktop interface for Windows network proxy administration, allowing users to store, organize, and switch between multiple remote server configurations. It specifically automates traffic routing via a proxy auto-config client, using PAC files to determine which web traffic enters the encrypted

ShadowsocksX-NG is a macOS application that functions as a Shadowsocks proxy client to establish encrypted tunnels for bypassing network censorship. It operates as an encrypted tunnel manager that allows for the configuration of secure ciphers and the import of proxy server profiles. The client includes a proxy converter that transforms SOCKS5 traffic into HTTP proxy traffic to provide compatibility for applications that do not support SOCKS. It also integrates a traffic steering system using Proxy Auto-Configuration files to automatically determine which network requests bypass the proxy. T

Lantern is a network utility designed to provide access to restricted internet content by tunneling traffic through encrypted connections. It functions as a censorship circumvention tool that enables private web browsing and ensures reliable connectivity in environments where standard network access is blocked or monitored. The application employs a decentralized infrastructure that routes data through a network of distributed proxy nodes. To maintain connectivity in the face of interference, it utilizes dynamic proxy discovery and adaptive fallback mechanisms that automatically switch betwee

Rathole is a high-performance reverse proxy and NAT traversal tool written in Rust. It functions as a secure tunneling server and client architecture designed to expose local services to the internet by forwarding traffic from a public IP to a private device behind a firewall. The system establishes encrypted tunnels between a public server and a private host to ensure private communication. It utilizes token-based authentication to validate identities between the server and client for each individual service. The project provides TCP and UDP port forwarding and manages private tunnels to fa

This project is a comprehensive computer networking textbook and instructional resource. It serves as a technical guide for the design and implementation of network layers, protocols, and hardware architecture, covering the spectrum from physical links to application-layer protocols. The content provides a detailed study of standards for congestion control, reliable data delivery, and internetwork routing. It includes specialized technical material on network security, public-key infrastructure, and the operation of modern cloud infrastructure and data centers. The material covers a broad ra

libp2p is a modular peer-to-peer networking stack designed for building decentralized applications. It provides the core infrastructure necessary for nodes to discover and connect with other participants across a network without relying on central servers. The project distinguishes itself through a flexible transport layer that abstracts multiple protocols, including TCP, QUIC, WebSockets, and WebTransport, into a single interface. It features specialized tools for NAT and firewall traversal, such as hole punching and relay nodes, to establish direct connections between peers and web browsers

Pingtunnel is a network utility that implements ICMP tunneling by encapsulating TCP and UDP traffic within ICMP echo packets. It functions as an encrypted network tunnel and a SOCKS5 proxy server, allowing network traffic to be routed through a secure channel to bypass restrictive firewalls and network filters. The tool secures transmitted data using symmetric encryption to prevent interception of the tunneled payload. It uses a SOCKS5 proxy interface to accept standard network requests and redirect them into the ICMP tunnel. The system includes adaptive network polling to balance latency an

wstunnel is a tool that tunnels arbitrary TCP traffic through WebSocket connections, enabling communication across restrictive firewalls and proxies. It operates as both a client and server, encapsulating TCP data within WebSocket binary frames and multiplexing multiple connections over a single WebSocket link. The tool supports mutual TLS authentication, requiring clients to present signed certificates for verification before establishing a tunnel, and provides shared secret access control and tunnel forwarding restrictions for additional security. The project distinguishes itself by offerin

Trojan-go is a network proxy implementation that uses the Trojan protocol to disguise internet traffic as standard TLS to bypass censorship and deep packet inspection. It functions as a tunneling gateway that encapsulates network data within encrypted tunnels to mimic ordinary web browsing. The project distinguishes itself through advanced obfuscation techniques, including TLS fingerprint mimicry to avoid detection by client signature identification and the use of WebSockets to relay encrypted traffic through content delivery networks. It also supports UDP forwarding through the Trojan protoc