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@ -21,66 +21,73 @@ So far I haven't found a tool that does all of this. In particular, while some
of them can do automatic certs through Lets's Encrypt, none of them integrate
the domain registration and DNS management.
**UPDATE:** Since starting this list I found most of the other solutions to be
either too complicated or making different tradeoffs than I would want. I have
two of my own projects in this space:
**UPDATE 2022-09-23:**
1. [SirTunnel](https://github.com/anderspitman/SirTunnel) is I believe the
minimal way of getting auto-HTTPS tunneled through to a private network.
It's just a 50-line Python script that leverages Caddy and OpenSSH, but you
need to understand how it works to use it. This one is good for developers.
A lot of new tools have been developed since the list started, and many tools have been submitted for addition to the list. It's great to see so much interest in tunneling. That said, I want to make sure this remains a useful resource for not just listing all the possible options, but helping people pick one that will solve their problem. With that goal in mind, I've moved some of the items to a separate section at the bottom. This is dedicated to more complicated tools like overlay networks which can support tunneling and similar use cases, but aren't focused exclusively on tunneling. Please let me know if you think something is in the wrong section.
2. [boringproxy](https://boringproxy.io/) is my take on a comprehensive tunnel
proxy solution. It's in beta but currently solves almost everything I want except
auto DNS management, and that's planned. Once the server is running this is a very
easy tool to use, and is targeted at non-developers.
# Recommendations
* For most people, I currently recommend [CloudFlare Tunnel](https://developers.cloudflare.com/cloudflare-one/connections/connect-apps/). Although it's closed source, this is the production-quality service that gets the closest to achieving the dream. It's also a loss-leader for CloudFlare's other products which means they can offer it for free. Note that it's technically against their ToS to host anything other than basic HTML pages on the free plan, including photos, audio, and video. In practice I'm not aware of many instances of this being enforced.
* If you want to self-host, there are many options. For something production ready [frp](https://github.com/fatedier/frp) is probably what you want. If you're a developer, I'd recommend starting with my own [SirTunnel](https://github.com/anderspitman/SirTunnel) project and modifying it for your needs. For non-developers and those wanting more of a GUI experience, I created [boringproxy](https://boringproxy.io/). It's my take on a comprehensive tunnel proxy solution. It's in beta but currently solves almost everything I want. Once the server is running this is a very easy tool to use and has some nice features.
# Open source (at least with a reasonably permissive license)
* [frp](https://github.com/fatedier/frp) [![frp github stars badge](https://img.shields.io/github/stars/fatedier/frp?style=flat)](https://github.com/fatedier/frp/stargazers) - Seems to be a pretty comprehensive open alternative to ngrok.
* [frp](https://github.com/fatedier/frp) [![frp github stars badge](https://img.shields.io/github/stars/fatedier/frp?style=flat)](https://github.com/fatedier/frp/stargazers) - Comprehensive open alternative to ngrok. Supports UDP, and has a P2P mode. I believe it uses a custom TCP protocol for multiplexing, which can either run over a single TCP connection or a connection pool.
* [ngrok 1.0](https://github.com/inconshreveable/ngrok) [![ngrok 1.0 github stars badge](https://img.shields.io/github/stars/inconshreveable/ngrok?style=flat)](https://github.com/inconshreveable/ngrok/stargazers) - Original version of ngrok. No longer developed in favor of the commercial 2.0 version.
* [localtunnel](https://github.com/localtunnel) [![localtunnel github stars badge](https://img.shields.io/github/stars/localtunnel/localtunnel?style=flat)](https://github.com/localtunnel/localtunnel/stargazers) - Written in node. Popular suggestion.
* [inlets](https://github.com/inlets) [![inlets github stars badge](https://img.shields.io/github/stars/inlets/inlets?style=flat)](https://github.com/inlets/inlets/stargazers) - Open source ngrok alternative. Has pro option.
* [ZeroTier](https://www.zerotier.com/) - [![zerotier github stars badge](https://img.shields.io/github/stars/zerotier/ZeroTierOne?style=flat)](https://github.com/zerotier/ZeroTierOne/stargazers) Layer 2 overlay network.
* [sshuttle](https://github.com/sshuttle/sshuttle) [![sshuttle github stars badge](https://img.shields.io/github/stars/sshuttle/sshuttle?style=flat)](https://github.com/sshuttle/sshuttle/stargazers) - Open source project originally from one of the founders of Tailscale. Server doesn't require root; client does. Explicitly designed to avoid TCP-over-TCP issues.
* [chisel](https://github.com/jpillora/chisel) [![chisel github stars badge](https://img.shields.io/github/stars/jpillora/chisel?style=flat)](https://github.com/jpillora/chisel/stargazers) - SSH under the hood, but still uses a custom client binary. Supports auto certs from LetsEncrypt.
* [chisel](https://github.com/jpillora/chisel) [![chisel github stars badge](https://img.shields.io/github/stars/jpillora/chisel?style=flat)](https://github.com/jpillora/chisel/stargazers) - SSH under the hood, but still uses a custom client binary. Supports auto certs from LetsEncrypt. Written in Go.
* [bore](https://github.com/ekzhang/bore) [![bore github stars badge](https://img.shields.io/github/stars/ekzhang/bore?style=flat)](https://github.com/ekzhang/bore/stargazers) - Minimal tunneling solution. MIT Licensed. Written in Rust.
* [rathole](https://github.com/rapiz1/rathole) [![rathole github stars badge](https://img.shields.io/github/stars/rapiz1/rathole?style=flat)](https://github.com/rapiz1/rathole/stargazers) - Similar to frp, including the config format, but with improved performance. Low resource consumption. Hot reload. Written in Rust.
* [expose](https://github.com/beyondcode/expose) [![expose github stars badge](https://img.shields.io/github/stars/beyondcode/expose?style=flat)](https://github.com/beyondcode/expose/stargazers) - ngrok alternative written in PHP.
* [Pritunl](https://pritunl.com/) [![pritunl github stars badge](https://img.shields.io/github/stars/pritunl/pritunl?style=flat)](https://github.com/pritunl/pritunl/stargazers) - Seems quite comprehensive and complicated. OpenVPN, WireGuard, and IPSec support.
* [teleconsole](https://www.teleconsole.com/) [![teleconsole github stars badge](https://img.shields.io/github/stars/gravitational/teleconsole?style=flat)](https://github.com/gravitational/teleconsole/stargazers) - SSH-based, but uses special client script. Focused on forwarding SSH console sessions, but can also forward ports.
* [go-http-tunnel](https://github.com/mmatczuk/go-http-tunnel) [![go-http-tunnel github stars badge](https://img.shields.io/github/stars/mmatczuk/go-http-tunnel?style=flat)](https://github.com/mmatczuk/go-http-tunnel/stargazers) - Uses a single HTTP/2 connection for muxing. Need to manually generate certs for server and clients.
* [sish](https://github.com/antoniomika/sish) [![sish github stars badge](https://img.shields.io/github/stars/antoniomika/sish?style=flat)](https://github.com/antoniomika/sish/stargazers) - Open source ngrok/serveo alternative. SSH-based but uses a custom server written in Go. Supports WebSocket tunneling.
* [tunnelto](https://tunnelto.dev/) [![tunnelto github stars badge](https://img.shields.io/github/stars/agrinman/tunnelto?style=flat)](https://github.com/agrinman/tunnelto/stargazers) - Open core (MIT). Written in Rust.
* [go-http-tunnel](https://github.com/mmatczuk/go-http-tunnel) [![go-http-tunnel github stars badge](https://img.shields.io/github/stars/mmatczuk/go-http-tunnel?style=flat)](https://github.com/mmatczuk/go-http-tunnel/stargazers) - Uses a single HTTP/2 connection for muxing. Need to manually generate certs for server and clients.
* [tunnelto](https://tunnelto.dev/) [![tunnelto github stars badge](https://img.shields.io/github/stars/agrinman/tunnelto?style=flat)](https://github.com/agrinman/tunnelto/stargazers) - Open source (MIT). Written in Rust.
* [wstunnel](https://github.com/erebe/wstunnel) [![wstunnel github stars badge](https://img.shields.io/github/stars/erebe/wstunnel?style=flat)](https://github.com/erebe/wstunnel/stargazers) - Proxies over WebSockets. Focus on proxying from behind networks that block certain protocols. Written in Haskell with executables provided.
* [PageKite](https://pagekite.net/) [![pagekite github stars badge](https://img.shields.io/github/stars/pagekite/PyPagekite?style=flat)](https://github.com/pagekite/PyPagekite/stargazers) - Comprehensive open source solution with hosted options.
* [Crowbar](https://github.com/q3k/crowbar) [![crowbar github stars badge](https://img.shields.io/github/stars/q3k/crowbar?style=flat)](https://github.com/q3k/crowbar/stargazers) - Tunnels TCP connections over HTTP GET and POST requests.
* [tunneller](https://github.com/skx/tunneller) [![tunneller github stars badge](https://img.shields.io/github/stars/skx/tunneller?style=flat)](https://github.com/skx/tunneller/stargazers) - Open source. Written in Go.
* [jprq](https://github.com/azimjohn/jprq) [![jprq github stars badge](https://img.shields.io/github/stars/azimjohn/jprq?style=flat)](https://github.com/azimjohn/jprq/stargazers) - Proxies over WebSockets. Written in Python.
* [PageKite](https://pagekite.net/) [![pagekite github stars badge](https://img.shields.io/github/stars/pagekite/PyPagekite?style=flat)](https://github.com/pagekite/PyPagekite/stargazers) - Comprehensive open source solution with hosted options.
* [boringproxy](https://boringproxy.io/) [![boringproxy github stars badge](https://img.shields.io/github/stars/boringproxy/boringproxy?style=flat)](https://github.com/boringproxy/boringproxy/stargazers) - Designed to be very easy to use. No config files. Clients can be remote-controlled through a simple WebUI and/or REST API on the server.
* [docker-tunnel](https://github.com/vitobotta/docker-tunnel) [![docker-tunnel github stars badge](https://img.shields.io/github/stars/vitobotta/docker-tunnel?style=flat)](https://github.com/vitobotta/docker-tunnel/stargazers) - Simple Docker-based nginx+SSH solution.
* [pgrok](https://www.proxy.jetzt/) [![pgrok github stars badge](https://img.shields.io/github/stars/jerson/pgrok?style=flat)](https://github.com/jerson/pgrok/stargazers) - Fork of ngrok 1.0, with more recent commits.
* [hypertunnel](https://github.com/berstend/hypertunnel) [![frp github stars badge](https://img.shields.io/github/stars/berstend/hypertunnel?style=flat)](https://github.com//berstend/hypertunnel/stargazers) - "When localtunnel/ngrok is not enough." But the public server seems to be down.
* [Crowbar](https://github.com/q3k/crowbar) [![crowbar github stars badge](https://img.shields.io/github/stars/q3k/crowbar?style=flat)](https://github.com/q3k/crowbar/stargazers) - Tunnels TCP connections over HTTP GET and POST requests.
* [jprq](https://github.com/azimjohn/jprq) [![jprq github stars badge](https://img.shields.io/github/stars/azimjohn/jprq?style=flat)](https://github.com/azimjohn/jprq/stargazers) - Proxies over WebSockets. Written in Python.
* [tunneller](https://github.com/skx/tunneller) [![tunneller github stars badge](https://img.shields.io/github/stars/skx/tunneller?style=flat)](https://github.com/skx/tunneller/stargazers) - Open source. Written in Go.
* [SirTunnel](https://github.com/anderspitman/SirTunnel) [![SirTunnel github stars badge](https://img.shields.io/github/stars/anderspitman/SirTunnel?style=flat)](https://github.com/anderspitman/SirTunnel/stargazers) - Minimal, self-hosted, 0-config alternative to ngrok. Similar to sish but leverages Caddy+OpenSSH rather than custom server code.
* [tunnel](https://github.com/koding/tunnel) [![tunnel github stars badge](https://img.shields.io/github/stars/koding/tunnel?style=flat)](https://github.com/koding/tunnel/stargazers) - This one is a Golang library, not a program you can just run. However, it looks easy to use for creating custom solutions. Uses a single TCP socket, and [yamux](https://github.com/hashicorp/yamux) for multiplexing.
* [pgrok](https://www.proxy.jetzt/) [![pgrok github stars badge](https://img.shields.io/github/stars/jerson/pgrok?style=flat)](https://github.com/jerson/pgrok/stargazers) - Fork of ngrok 1.0, with more recent commits.
* [docker-tunnel](https://github.com/vitobotta/docker-tunnel) [![docker-tunnel github stars badge](https://img.shields.io/github/stars/vitobotta/docker-tunnel?style=flat)](https://github.com/vitobotta/docker-tunnel/stargazers) - Simple Docker-based nginx+SSH solution.
* [hypertunnel](https://github.com/berstend/hypertunnel) [![frp github stars badge](https://img.shields.io/github/stars/berstend/hypertunnel?style=flat)](https://github.com//berstend/hypertunnel/stargazers) - "When localtunnel/ngrok is not enough." But the public server seems to be down.
* [remotemoe](https://github.com/fasmide/remotemoe) [![remotemoe github stars badge](https://img.shields.io/github/stars/fasmide/remotemoe?style=flat)](https://github.com/fasmide/remotemoe/stargazers) - SSH-based, with custom golang server. Does some cool unique things. Instead of just plain tunnels, it drops you into a basic CLI UI that offers several useful commands interactively, such as adding a custom hostname. Also allows end-to-end encryption for both HTTPS and upstream SSH. Doesn't appear to offer non-e2e HTTPS, ie no auto Let's Encrypt support.
* [holepunch.io](https://holepunch.io) [![holepunch github stars badge](https://img.shields.io/github/stars/CypherpunkArmory/holepunch?style=flat)](https://github.com/CypherpunkArmory/holepunch/stargazers) - Has nice hosted solution. Uses SSH for muxing.
* [holepunch](https://github.com/CypherpunkArmory/holepunch) [![holepunch github stars badge](https://img.shields.io/github/stars/CypherpunkArmory/holepunch?style=flat)](https://github.com/CypherpunkArmory/holepunch/stargazers) - Has nice hosted solution. Uses SSH for muxing.
* [StaqLab Tunnel](https://tunnel.staqlab.com/) [![staqlab github stars badge](https://img.shields.io/github/stars/abhishekq61/tunnel-client?style=flat)](https://github.com/abhishekq61/tunnel-client/stargazers) - SSH-based. Client is open source. Server doesn't appear to be.
* [tnnlink](https://github.com/LiljebergXYZ/tnnlink) [![tnnlink github stars badge](https://img.shields.io/github/stars/LiljebergXYZ/tnnlink?style=flat)](https://github.com/LiljebergXYZ/tnnlink/stargazers) - SSH-based. Golang. Not maintained.
* [Telebit](https://telebit.cloud/) - Written in JS. [Code](https://git.coolaj86.com/coolaj86/telebit.js).
* [SSH-J.com](https://bitbucket.org/ValdikSS/dropbear-sshj/) - Public SSH Jump & Port Forwarding server. No software, no registration, just an anonymous SSH server for forwarding. Users are encouraged to use it for SSH exposure only, to preserve end-to-end encryption. No public ports, only in-SSH connectivity. Run `ssh ssh-j.com` and it will display usage information.
* [Ngrok-operator](https://github.com/zufardhiyaulhaq/ngrok-operator) - Ngrok but integrated with Kubernetes, allows developers on private kubernetes to easily access their services via Ngrok.
# Commercial/Closed source
* [ngrok 2.0](https://ngrok.com/) - Probably the gold standard and most popular. Closed source. Lots of features, including TLS and TCP tunnels. Doesn't require root to run client.
* [Tailscale](https://www.tailscale.com/) [![tailscale github stars badge](https://img.shields.io/github/stars/tailscale/tailscale?style=flat)](https://github.com/tailscale/tailscale/stargazers) - Built on WireGuard. Easy to use. Doesn't include an HTTPS proxy on the public side, but could be combined with nginx/Caddy/etc. Client [code](https://github.com/tailscale) available with a BSD3 license + separate patents file.
* [Loophole](https://loophole.cloud/) - Offers end-to-end TLS encryption with the client automatically getting certs from Let's Encrypt. QR codes for URL sharing.
* [CloudFlare Argo Tunnel](https://www.cloudflare.com/products/argo-tunnel/) - [Free usage](https://blog.cloudflare.com/a-free-argo-tunnel-for-your-next-project/#how-can-i-use-the-free-version) available. $5/mo + $0.1/GB. Integrates with Argo smart routing. Client source code is [available](https://github.com/cloudflare/cloudflared).
* [CloudFlare Tunnel](https://developers.cloudflare.com/cloudflare-one/connections/connect-apps/install-and-setup) - Excellent free option. Nicely integrates tunneling with the rest of Cloudflare's products, which include DNS and auto HTTPS. Client [source code](https://github.com/cloudflare/cloudflared) is Apache 2.0 licensed and written in Golang.
* [Loophole](https://loophole.cloud/) - Offers end-to-end TLS encryption with the client automatically getting certs from Let's Encrypt. QR codes for URL sharing. Client is open source. Can serve a local directory over WebDAV. MIT License. Written in Go.
* [localhost.run](https://localhost.run/) - Simple hosted SSH option. Supports custom domains for a cost.
* [Packetriot](https://packetriot.com) - Comprehensive alternative to ngrok. HTTP Inspector, Let's Encrypt integration, doesn't require root and Linux repos for apt, yum and dnf. Enterprise licenses and self-hosted option.
* [Lynk](https://lynk.sh/) - Advertises itself as a cheaper, faster, self-hostable (but not open source) alternative to ngrok. [Blog post](https://medium.com/@shivanshvij/building-a-better-ngrok-dbc104754822).
* [Hoppy](https://hoppy.network/) - WireGuard-based. Provides static IPv4 and IPv6 addresses for your machines, which is a simple and useful level of abstraction. Targeted towards self-hosters and people behind NATs.
* [gw.run](https://gw.run/) - Specifically focusing on securely exposing internal web apps to a group of people; not for publicly facing apps. Share access via email address then allow users to log in with common login providers like Google.
* [SSHReach.me](https://sshreach.me/) - Paid SSH-based option. Uses a simple python script.
* [KubeSail](https://kubesail.com/) - Company offering tunneling, dynamic DNS, and other services for self-hosting with Kubernetes.
* [inlets](https://inlets.dev/) - Used to be [open source](https://github.com/inlets/inlets-archived); now focused on a polished commercial offering. Designed to work well with Kubernetes.
* [LocalToNet](https://localtonet.com/) - Supports UDP. Free for a single tunnel. Paid supports custom domains.
# Overlay networks and other advanced tools
* [Teleport](https://goteleport.com/) [![teleport github stars badge](https://img.shields.io/github/stars/gravitational/teleport?style=flat)](https://github.com/gravitational/teleport) - Comprehesive control plane tool, but also supports [accessing apps](https://goteleport.com/docs/application-access/introduction/) behind NATs. Written in Go.
* [Nebula](https://github.com/slackhq/nebula) - [![nebula github stars badge](https://img.shields.io/github/stars/slackhq/nebula?style=flat)](https://github.com/zerotier/slackhq/nebula) Peer-to-peer overlay network. Developed and used internally by Slack. Similar to Tailscale but completely open source. Doesn't use WireGuard. Written in Go.
* [ZeroTier](https://www.zerotier.com/) - [![zerotier github stars badge](https://img.shields.io/github/stars/zerotier/ZeroTierOne?style=flat)](https://github.com/zerotier/ZeroTierOne/stargazers) Layer 2 overlay network. They take decentralization seriously, and like to say "decentralize until it hurts, then centralize until it works." Written in C++.
* [OpenZiti](https://openziti.github.io) - [![OpenZiti github stars badge](https://img.shields.io/github/stars/openziti/ziti?style=flat)](https://github.com/openziti/ziti/stargazers) - Overlay network. The goal of OpenZiti is to extend zero trust all the way into your application, not just to your network. Apache 2.0 license. Written in Go.
* [Tailscale](https://www.tailscale.com/) [![tailscale github stars badge](https://img.shields.io/github/stars/tailscale/tailscale?style=flat)](https://github.com/tailscale/tailscale/stargazers) - Built on WireGuard. Easy to use. Doesn't include an HTTPS proxy on the public side, but could be combined with nginx/Caddy/etc. Control server is closed source. Client [code](https://github.com/tailscale) available with a BSD3 license + separate patents file.
* [headscale](https://github.com/juanfont/headscale) [![headscale github stars badge](https://img.shields.io/github/stars/juanfont/headscale?style=flat)](https://github.com/juanfont/headscale/stargazers) - Open source implementation of Tailscale control server. Can be used with Tailscale's official open source client. Written in Go.
* [Netmaker](https://github.com/gravitl/netmaker) [![netmaker github stars badge](https://img.shields.io/github/stars/gravitl/netmaker?style=flat)](https://github.com/gravitl/netmaker/stargazers) - Layer 3 peer-to-peer overlay network and private DNS. Similar to Tailscale, but with a self-hosted server/admin UI. Runs kernel WireGuard so very fast. Written in Go.
* [Pritunl](https://pritunl.com/) [![pritunl github stars badge](https://img.shields.io/github/stars/pritunl/pritunl?style=flat)](https://github.com/pritunl/pritunl/stargazers) - Seems quite comprehensive and complicated. OpenVPN, WireGuard, and IPSec support.
* [NetBird](https://github.com/netbirdio/netbird) [![netbird github stars badge](https://img.shields.io/github/stars/netbirdio/netbird?style=flat)](https://github.com/netbirdio/netbird/stargazers) - NetBird is an open-source VPN management platform built on top of WireGuard® making it easy to create secure private networks for your organization or home.
* [Ngrok-operator](https://github.com/zufardhiyaulhaq/ngrok-operator) [![ngrok operator github stars badge](https://img.shields.io/github/stars/zufardhiyaulhaq/ngrok-operator?style=flat)](https://github.com/zufardhiyaulhaq/ngrok-operator/stargazers) - Ngrok but integrated with Kubernetes, allows developers on private kubernetes to easily access their services via Ngrok.
# Reference