rathole - NAT traversal proxy - alternative to frp, ngrok, etc

[robi]

rathole

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A secure, stable and high-performance reverse proxy for NAT traversal, written in Rust

rathole, like frp and ngrok, can help to expose the service on the device behind the NAT to the Internet, via a server with a public IP.

• rathole
  • Features
  • Quickstart
  • Configuration
    • Logging
    • Tuning
  • Benchmark
  • Planning

Features

• High Performance Much higher throughput can be achieved than frp, and more stable when handling a large volume of connections. See Benchmark
• Low Resource Consumption Consumes much fewer memory than similar tools. See Benchmark. The binary can be as small as ~500KiB to fit the constraints of devices, like embedded devices as routers.
• Security Tokens of services are mandatory and service-wise. The server and clients are responsible for their own configs. With the optional Noise Protocol, encryption can be configured at ease. No need to create a self-signed certificate! TLS is also supported.
• Hot Reload Services can be added or removed dynamically by hot-reloading the configuration file. HTTP API is WIP.

Quickstart

A full-powered rathole can be obtained from the release page. Or build from source for other platforms and minimizing the binary. A Docker image is also available.

The usage of rathole is very similar to frp. If you have experience with the latter, then the configuration is very easy for you. The only difference is that configuration of a service is split into the client side and the server side, and a token is mandatory.

To use rathole, you need a server with a public IP, and a device behind the NAT, where some services that need to be exposed to the Internet.

Assuming you have a NAS at home behind the NAT, and want to expose its ssh service to the Internet:

1. On the server which has a public IP

Create server.toml with the following content and accommodate it to your needs.

# server.toml
[server]
bind_addr = "0.0.0.0:2333" # `2333` specifies the port that rathole listens for clients

[server.services.my_nas_ssh]
token = "use_a_secret_that_only_you_know" # Token that is used to authenticate the client for the service. Change to a arbitrary value.
bind_addr = "0.0.0.0:5202" # `5202` specifies the port that exposes `my_nas_ssh` to the Internet

Then run:

./rathole server.toml

2. On the host which is behind the NAT (your NAS)

Create client.toml with the following content and accommodate it to your needs.

# client.toml
[client]
remote_addr = "myserver.com:2333" # The address of the server. The port must be the same with the port in `server.bind_addr`

[client.services.my_nas_ssh]
token = "use_a_secret_that_only_you_know" # Must be the same with the server to pass the validation
local_addr = "127.0.0.1:22" # The address of the service that needs to be forwarded

Then run:

./rathole client.toml

3. Now the client will try to connect to the server myserver.com on port 2333, and any traffic to myserver.com:5202 will be forwarded to the client's port 22.

So you can ssh myserver.com:5202 to ssh to your NAS.

[ovny]

I'm using rathole on my server. It's easy enough to install the binary on the host. Rathole is pretty awesome. I'm hosting everything from home without any ports open and a cheap VPS.

Are you looking for a rathole per app config?

[robi]

@ovny said in rathole - NAT traversal proxy - alternative to frp, ngrok, etc:

Are you looking for a rathole per app config?

No, but it would be a useful packaged server side app one can configure per client app behind CG/NAT.

[Recliner2042]

@ovny Could you make a guide on how to do this? I think it would help with the port 25 issue, among other things.

[LoudLemur]

@ovny said in rathole - NAT traversal proxy - alternative to frp, ngrok, etc:

I'm using rathole on my server. It's easy enough to install the binary on the host. Rathole is pretty awesome. I'm hosting everything from home without any ports open and a cheap VPS.

If you have time, it would be awesome if you could explain how to set up this so that others could try self-hosting Cloudron at home using a cheap VPS for the outside world.

[Recliner2042]

@robi How would you configure it to forward everything, rather than just one port?