# udp2raw: Bypass UDP Firewalls with Encrypted FakeTCP/UDP/ICMP Tunnels This repository profile is provided by osrepos.com, an open source repository discovery platform. Source: osrepos.com Repository profile: https://osrepos.com/repo/wangyu--udp2raw Generated for open source discovery and AI-assisted research. udp2raw is a powerful tunnel that transforms UDP traffic into encrypted FakeTCP, UDP, or ICMP traffic using raw sockets. It effectively helps users bypass UDP firewalls, overcome unstable UDP environments, and improve connection stability. This tool is particularly useful when combined with UDP-based VPNs, enabling the tunneling of any traffic type. GitHub: https://github.com/wangyu-/udp2raw OSRepos URL: https://osrepos.com/repo/wangyu--udp2raw ## Summary udp2raw is a powerful tunnel that transforms UDP traffic into encrypted FakeTCP, UDP, or ICMP traffic using raw sockets. It effectively helps users bypass UDP firewalls, overcome unstable UDP environments, and improve connection stability. This tool is particularly useful when combined with UDP-based VPNs, enabling the tunneling of any traffic type. ## Topics - bypass-firewall - faketcp - icmp-tunnel - raw-socket - udp-tunnel - tunnel - C++ - network-security ## Repository Information Last analyzed by OSRepos: Mon Nov 03 2025 16:01:52 GMT+0000 (Western European Standard Time) Detail views: 28 GitHub clicks: 11 ## Safety Notice OSRepos shares public repositories for knowledge and discovery only. Review source code, dependencies, licenses, and security implications before running or installing anything. ## Content ## Introduction `udp2raw` is an innovative tunneling tool designed to transform standard UDP traffic into encrypted FakeTCP, UDP, or ICMP traffic. By leveraging raw sockets, `udp2raw` provides a robust solution for bypassing UDP firewalls, mitigating issues in unstable UDP environments, and enhancing overall connection reliability. While it primarily tunnels UDP traffic, its power is fully realized when combined with any UDP-based VPN, allowing for the secure tunneling of all types of network traffic, including TCP, UDP, and ICMP. This makes it an invaluable asset for users seeking to circumvent network restrictions and improve their online experience. ## Installation Getting started with `udp2raw` is straightforward. The easiest way to install it is by downloading the pre-compiled binaries for your specific platform from the official GitHub Releases page. 1. **Download Binaries**: Visit the [udp2raw Releases page](https://github.com/wangyu-/udp2raw-tunnel/releases "udp2raw Releases") and download the appropriate binary for your Linux host (e.g., `udp2raw_amd64` for 64-bit Linux). 2. **Permissions**: Ensure the downloaded binary has execute permissions. You might need to run `chmod +x udp2raw_amd64`. 3. **Windows and macOS**: For Windows and macOS users, a separate multiplatform repository is available: [udp2raw-multiplatform](https://github.com/wangyu-/udp2raw-multiplatform "udp2raw-multiplatform"). ## Examples Here's a basic example demonstrating how to set up `udp2raw` on both the server and client sides, assuming your UDP traffic is blocked or experiencing QoS issues. Let's say your server IP is `44.55.66.77` and you have a service listening on UDP port `7777`. ### Server Side Run this command on your server: bash ./udp2raw_amd64 -s -l0.0.0.0:4096 -r 127.0.0.1:7777 -k "passwd" --raw-mode faketcp -a * `-s`: Specifies server mode. * `-l0.0.0.0:4096`: `udp2raw` listens on all interfaces on port `4096` for incoming raw connections. * `-r 127.0.0.1:7777`: Redirects incoming traffic to the local UDP service on port `7777`. * `-k "passwd"`: Sets the shared password for encryption and authentication. * `--raw-mode faketcp`: Configures `udp2raw` to encapsulate UDP traffic within FakeTCP headers. * `-a`: Automatically adds necessary iptables rules to prevent the kernel from interfering with FakeTCP packets. ### Client Side Run this command on your client: bash ./udp2raw_amd64 -c -l0.0.0.0:3333 -r44.55.66.77:4096 -k "passwd" --raw-mode faketcp -a * `-c`: Specifies client mode. * `-l0.0.0.0:3333`: The client listens on port `3333` for local UDP traffic. * `-r44.55.66.77:4096`: Connects to the `udp2raw` server at `44.55.66.77` on port `4096`. * `-k "passwd"`: Uses the same shared password as the server. * `--raw-mode faketcp`: Matches the server's raw mode. * `-a`: Automatically adds necessary iptables rules. After these steps, any UDP traffic sent to `0.0.0.0:3333` on the client will be securely tunneled as FakeTCP traffic to the server and then forwarded to `127.0.0.1:7777`. ## Why Use udp2raw? `udp2raw` offers several compelling advantages for users facing network restrictions or seeking enhanced connection stability and security: * **Bypass UDP Restrictions**: Effectively circumvents UDP blocking, QoS limitations, or problematic NAT behaviors imposed by ISPs by disguising UDP traffic as FakeTCP, ICMP, or even regular UDP with added features. * **Advanced FakeTCP Simulation**: Its FakeTCP mode simulates a real TCP connection, including 3-way handshakes and sequence numbers, without the "TCP over TCP" performance issues often encountered with VPNs. This makes the traffic appear legitimate to firewalls. * **Robust Encryption and Anti-Replay**: Protects your data with AES-128-CBC encryption and ensures data integrity with HMAC-SHA1. An anti-replay window defends against replay attacks, significantly enhancing security. * **Exceptional Connection Stability**: Features heartbeat-based failure detection and automatic reconnection. Even if your network cable is unplugged or your WiFi access point changes, `udp2raw` can recover the connection, ensuring continuous service for applications like OpenVPN. * **Versatile Tunneling**: While primarily for UDP, when paired with a UDP-based VPN (like OpenVPN, L2TP, or tinyfecVPN), `udp2raw` can tunnel all types of traffic, providing a comprehensive solution for bypassing censorship and improving network performance. * **Easy to Deploy**: With no external dependencies and pre-compiled binaries available, `udp2raw` is simple to set up and run on various Linux-based systems, including desktops, Android devices, OpenWRT routers, and Raspberry Pi. ## Links * **GitHub Repository**: [https://github.com/wangyu-/udp2raw](https://github.com/wangyu-/udp2raw "udp2raw GitHub Repository") * **Wiki**: [https://github.com/wangyu-/udp2raw-tunnel/wiki](https://github.com/wangyu-/udp2raw-tunnel/wiki "udp2raw Wiki") * **Releases**: [https://github.com/wangyu-/udp2raw-tunnel/releases](https://github.com/wangyu-/udp2raw-tunnel/releases "udp2raw Releases") * **Multiplatform Version (Windows/macOS)**: [https://github.com/wangyu-/udp2raw-multiplatform](https://github.com/wangyu-/udp2raw-multiplatform "udp2raw Multiplatform Version")