Open Source C# Tunneling Software

The ProtonVPN Windows app project hosts the official open-source client software that lets users securely connect their Windows machines to the ProtonVPN service with full system-wide VPN protection. It includes a modern GUI built with .NET and WPF that lets users authenticate, choose VPN servers, and configure features like split tunneling or kill switch, while a background Windows service manages VPN connections using the OpenVPN protocol and handles networking tasks such as firewall and adapter configuration. The app integrates a custom TAP driver and a split tunnel callout driver to help route traffic securely and prevent leaks, and is structured so the GUI and service components work together to deliver a smooth user experience on Windows desktops and laptops. ProtonVPN’s Windows client supports both free and paid users with access to Proton’s global server network, encrypted tunnels, and privacy-first policies that block logging and respect user anonymity.

TunMod VPN Client is a Windows App designed for secure VPN tunneling and seamless server connections. Featuring Payload Generator, SSH Client, SSL/TLS Tunneling, and multi-profile management, it allows for customized, encrypted connections. TunMod also supports V2Ray, Xray, and XTLS protocols,l2tp,PPTP,HTTPS,OpenVPN, making it a comprehensive solution for advanced tunneling needs. Any suggestions or bug reports: tunmodsupp@gmail.com https://github.com/TunMod/TunMod-VPN-Client

File-Tunnel is a tunneling tool that moves TCP connections through a shared file or file server. It is built around the unusual idea that two systems can exchange network data by reading and writing files that both sides can access. This makes it useful in environments where direct TCP connectivity is blocked but a shared folder, FTP server, S3-compatible storage, Dropbox folder, RDP drive share, or similar file channel is available. The project provides portable executables for Windows, Linux, and macOS, which makes it practical for cross-platform testing. Its documentation includes examples for bypassing firewall limitations, tunneling through FTP, using remote internet access, and routing through remote desktop file shares. File-Tunnel is best understood as a specialized connectivity workaround for controlled environments where file access exists but normal network routing does not.

WgServer for Windows, also known as WS4W, is a Windows desktop application for running and managing a WireGuard server endpoint. It was created to simplify the process of setting up WireGuard on Windows without requiring users to manually edit the registry, run scripts, or configure every networking step through Control Panel. The application can install WireGuard for Windows, generate or accept server keys, create server configuration files, and help manage the Windows networking pieces needed for internet sharing. It is designed for Windows Server and Windows desktop environments where a graphical setup flow is preferred over command-line configuration. The tool still requires users to handle network realities such as router port forwarding, but it reduces much of the local setup friction. It is especially useful for small Windows-based VPN deployments that need WireGuard server management without moving to Linux.

NSmartProxy is a reverse proxy system that enables external access to devices or applications behind NAT/firewalls without requiring public IPs or router configuration. It’s designed to work with desktop and server apps, and includes a centralized SmartNode server that helps initiate and maintain tunnel connections. This makes it ideal for remote access to local services or self-hosted applications. NSmartProxy supports both TCP and UDP protocols, making it versatile for a wide range of network needs.

ASProxyWing is a handy, easy to use client / server desktop distributed proxy, which works as a HTTP-tunnel for clients. Provides high secure, easy to integrate proxy servers.

Changes proxy settings in Firefox and connects to a SOCKS proxy, making all your Firefox browsing safe.

It is a versatile DNS Proxy server with DNS firewall which filters DNS traffic between local computer and DNS servers with flexible rules, supports blocking by IP geography, caching, import/export rules into XML. With a click of a button acts as a DNS proxy (or DNS server), supports multiple client authentication methods, calculates statistics for DNS servers and proxy clients, supports load balancing between multiple upstream DNS servers.

xmelee is an xbox peer-to-peer tunneling program. It enables lan games (system link) to be played over the internet. The packetization is highly optimized which permits the lowest lag possible when extending game play over the internet.

This is a project we - ten students, 16 to 18 years old, and one teacher - are currently working on in the so called "Physik-Projektkurs" at school in which we build and program our own scanning tunneling microscope. This software is designed for DAQ systems by BMCM (we use the USB-AD16F), but it should not be too difficult to adapt it to foreign systems.It currently supports resolutions up to 1024x1024, visualization in 2D and 3D using colors from predefined gradients, export to PNG, CSV, OBJ and more! Requires at least .Net Framework 4.0, DirectX 9, optional: BMCM driver for your DAQ system

HTTP Tunnel that works with ANY HTTP proxy: no CONNECT method required! You can use the port redirector or Socks 4/4a/5 to connect outside your (restricted) LAN. An external web server is required, to be used as gateway.

OnionFruit Connect is a different way to access the tor network. Instead of downloading a different browser, you can use whatever one you already use. This app starts the tor service, and then modifies your proxy settings to route most of your apps through the tunnel made by tor. When you see the page saying you're connected, All your internet data passing through the tunnel is encrypted. Every site you visit is routed through a different set of servers, making it 'impossible' to track you. This project is moving to GitHub soon. https://github.com/dragonfruitnetwork/onionfruit

Remote Support is a simple solution aimed at providing RDP based remote support. Tunneling RDP traffic through firewalls and NAT is done with the help of a private proxy server accessible on the internet.

Telnet over HTTP proxy. Allows users behind firewalls to tunnel Telnet sessions over a HTTP connection. Server uses Java servlets with a Java or C# client.

WarpTunnel is a porting of http tunnel 3.3 from C into .NET C# platform. WarpTunnel creates a bidirectional virtual data path tunnelled in HTTP requests through firewall or proxy servers.Support DIGEST proxy & SOCKS4/4a/5.Client for Compact Framework 2.0

multi media protocol implementation on .net platform, its will include protocol like SDP,SIP,RSTP,RTCP and RTP ... this will be extended to support http tunneling for this protocol.