# `tunnelto` `tunnelto` lets you expose your locally running web server via a public URL. Written in Rust. Built completely with async-io on top of tokio. 1. [Install](#install) 2. [Usage Instructions](#usage) 3. [Host it yourself](#host-it-yourself) # Install ## Brew (macOS) ```bash brew install agrinman/tap/tunnelto ``` ## Cargo ```bash cargo install tunnelto ``` ## Everywhere Or **Download a release for your target OS here**: [tunnelto/releases](https://github.com/agrinman/tunnelto/releases) # Usage ## Quick Start ```shell script tunnelto --port 8000 ``` The above command opens a tunnel and forwards traffic to `localhost:8000`. ## More Options: ```shell script tunnelto 0.1.14 USAGE: tunnelto [FLAGS] [OPTIONS] [SUBCOMMAND] FLAGS: -h, --help Prints help information -V, --version Prints version information -v, --verbose A level of verbosity, and can be used multiple times OPTIONS: --dashboard-address Sets the address of the local introspection dashboard -k, --key Sets an API authentication key to use for this tunnel --host Sets the HOST (i.e. localhost) to forward incoming tunnel traffic to [default: localhost] -p, --port Sets the port to forward incoming tunnel traffic to on the target host --scheme Sets the SCHEME (i.e. http or https) to forward incoming tunnel traffic to [default: http] -s, --subdomain Specify a sub-domain for this tunnel SUBCOMMANDS: help Prints this message or the help of the given subcommand(s) set-auth Store the API Authentication key ``` # Host it yourself 1. Compile the server for the musl target. See the `musl_build.sh` for a way to do this trivially with Docker! 2. See `Dockerfile` for a simple alpine based image that runs that server binary. 3. Deploy the image where ever you want. ## Testing Locally ```shell script # Run the Server: xpects TCP traffic on 8080 and control websockets on 5000 ALLOWED_HOSTS="localhost" cargo run --bin tunnelto_server # Run a local tunnelto client talking to your local tunnelto_server CTRL_HOST="localhost" CTRL_PORT=5000 CTRL_TLS_OFF=1 cargo run --bin tunnelto -- -p 8000 # Test it out! # Remember 8080 is our local tunnelto TCP server curl -H '.localhost' "http://localhost:8080/some_path?with=somequery" ``` See `tunnelto_server/src/config.rs` for the environment variables for configuration. ## Caveats for hosting it yourself The implementation does not support multiple running servers (i.e. centralized coordination). Therefore, if you deploy multiple instances of the server, it will only work if the client connects to the same instance as the remote TCP stream. The [version hosted by us](https://tunnelto.dev) is a proper distributed system running on the the fabulous [fly.io](https://fly.io) service. In short, fly.io makes this super easy with their [Private Networking](https://fly.io/docs/reference/privatenetwork/) feature. See `tunnelto_server/src/network/mod.rs` for the implementation details of our gossip mechanism.