L4Proxy

L4Proxy is a rudimentary layer 4 proxy, currently supporting IPv4 TCP connections.

Quick Start

1. Download a version from the releases page for your platform.
2. Create a configuration file. An example is provided here
3. Run the proxy:

   l4proxy -c l4proxy_example.yaml
   

4. Test it:

   telnet localhost 1313
   

   you should now see you're connected to either one of your configured backends.

How it works

l4proxy is really mostly a proof of concept for my use case of injecting traffic into my on-premise Kubernetes cluster so don't expect miracles from it. However, I appreciate any feedback so please don't hesitate filing issues or PRs.

Features

• Supports multiple backends
• Exercises health checks for each backend
• Randomly chooses a healthy backend for each new connection