Open Source C# Proxy Servers

Jackett works as a proxy server, it translates queries from apps (Sonarr, Radarr, SickRage, CouchPotato, Mylar3, Lidarr, DuckieTV, qBittorrent, Nefarious, etc.) into tracker-site-specific HTTP queries, parses the HTML or JSON response, and then sends results back to the requesting software. This allows for getting recent uploads (like RSS) and performing searches. Jackett is a single repository of maintained indexer scraping & translation logic, removing the burden from other apps. Trackers marked with (invite needed) have no active maintainer and may be missing features or be broken. If your client supports multiple feeds it's recommended to add each indexer directly instead of using all indexers. Using the all indexer has no advantages (besides reduced management overhead). We recommend you install Jackett as a Windows service using the supplied installer. You may also download the zipped version if you would like to configure everything manually.

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.

Proxy Master is a freeware that allows to test list of proxy servers for an availability with particular web resource. It downloads data from that resource for each proxy server and checks data downloaded. Proxy list is imported from Windows buffer using search templates for proxy servers data. Proxy Master allows easily switch currently set proxy server on and off.

Requirements: .NET Framework 4.6.1 or higher.

Proxymizer is an anonymizer (a proxy server connecting to other proxy servers), allowing simultaneous use of several public proxy servers, one per single request. Highly extensible and configurable.

Directory Monitor Application by WEBNETSOFT http://www.webnetsoft.gr. You need .NET 4 to run DiMo. DiMo makes use of open source framework CSharpFrame, https://sourceforge.net/projects/csharpframe.

FastTunnel is a high-performance cross-platform intranet penetration tool. With it, you can expose intranet services to the public network for yourself or anyone to access. Unlike other penetration tools, the FastTunnel project is committed to creating an easy-to-extensible and easy-to-maintain intranet penetration framework. You can build your own penetration application by referencing the nuget package of FastTunnel.Core, and target the business extension functions you need.

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.

NatoNews is an NNTP proxy server written in C# that caches all messages into a database for quick subsequent retrieval. It ultimately aims to be platform independent, NNTP client independent, database independent and have an ASP.net search front-end.

NetSelector allows to change network settings like IP address, DNS, Gateway, network shares, network drives and proxy servers in one click. The proxy server option supports different browsers and is extendable via plugins.

A toolkit to create code-first HTTP Reverse Proxies hosted in ASP.NET Core as middleware. This allows focused code-first proxies that can be embedded in existing ASP.NET Core applications or deployed as a standalone server. Deployable anywhere ASP.NET Core is deployable such as Windows, Linux, Containers and Serverless (with caveats). Having built proxies many times before, I felt it is time to make a package. Forked from ASP.NET labs, it has been heavily modified with a different API, to facilitate a wider variety of proxying scenarios (i.e. routing based on a JWT claim) and interception of the proxy requests/responses for customization of headers and (optionally) request/response bodies. It also uses HttpClientFactory internally that will mitigate against DNS caching issues making it suitable for microservice/container environments.

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.

SoapTrace.Net. A soap message monitoring utility written in C#. Captures soap messages by behaving as a proxy server or by capturing data packets using the WinPcap library or Windows Raw Sockets.

YARP is a library to help create reverse proxy servers that are high-performance, production-ready, and highly customizable. We found a bunch of internal teams at Microsoft who were either building a reverse proxy for their service or had been asking about APIs and tech for building one, so we decided to get them all together to work on a common solution, this project. Each of these projects was doing something slightly off the beaten path which meant they were not well served by existing proxies, and customization of those proxies had a high cost and ongoing maintenance considerations. Many of the existing proxies were built to support HTTP/1.1, but with workloads changing to include gRPC traffic, they require HTTP/2 support which requires a significantly more complex implementation. By using YARP the projects get to customize the routing and handling behavior without having to implement the http protocol.

An extensible, plugin-based HTTP proxy server suitable for penetration testing, development testing, protocol analysis and security assessment.