# FastTunnel/FastTunnel

expose a local server to the internet.  高性能跨平台的内网穿透解决方案 远程内网计算机 域名访问内网站点 反向代理内网服务 端口转发 http代理

Repository: https://github.com/FastTunnel/FastTunnel
Canonical: https://ross.abutalabs.com/products/fasttunnel
Language: C#
License: Apache-2.0
License Family: permissive
Topics: tunnel, proxy, http-proxy, tcp-proxy, reverse-proxy, nat, ssh, rdp
Last push: 2026-05-20T06:59:34+00:00

## Health v2 (maintenance only)
Score: 87/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 83, release rhythm 84, longevity 100
- inputs: {"age_days": 2453, "days_push": 105, "days_rel": 105, "gap_med": 0, "n_releases_24m": 4}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1700, forks 340 (observed 2026-08-28T04:05:24.255072+00:00)

## What it is
FastTunnel is a high-performance, cross-platform intranet penetration (NAT traversal) tool written in C#/.NET that exposes local network services to the public internet. It supports remote access to intranet computers, custom domain access to internal web services, and port forwarding, and can also be used as an extensible framework via its NuGet package.

## Use cases
- expose a local web server to the internet
- access my home computer remotely via SSH or RDP
- use a custom domain to reach an intranet site for WeChat development
- forward a port to reach internal MySQL or Redis
- reverse proxy services behind NAT without a public IP
- build a custom tunneling app on top of a penetration framework

## When to choose
- you need a self-hosted ngrok/frp alternative
- you want domain-based access to multiple intranet web services
- you need a .NET-extensible tunneling framework
- you need cross-platform (Windows/Linux/Mac) tunneling

## When to avoid
- you need P2P tunneling (not yet supported)
- you need a battle-tested solution for critical production traffic
- you prefer a tool with a large ecosystem and plugin marketplace

## Facets
- artifact type: application
- maturity: active
- function: proxy, networking, http-server, security
- domain: networking, self-hosted, developer-tools, privacy
- platform: cross-platform, windows, dotnet, cli
- tags: nat-traversal, reverse-proxy, port-forwarding, tunnel, intranet-penetration, tcp-proxy, http-proxy, remote-access, linux, macos

## Member repositories
- FastTunnel/FastTunnel (main) score 87

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:24.255072+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:37:44.945464+00:00, confidence not recorded.
  - readme: https://github.com/FastTunnel/FastTunnel (fetched 2026-08-28T04:05:24.255072+00:00, sha a7d93b23e77a)
- Data as of 2026-08-30T08:39:29.467469+00:00.