powproxy
Experimental reverse proxy that demands proof-of-work (in the form of an HTML file with a script tag that computes hashes) before it lets a request through.
The purpose is to deter DOS attacks by making them computationally expensive.
How to run
- Start your server on localhost:8080. Requests that pass the challenge will be proxied there.
- Start
cargo run, which will bind to localhost:3000 - Visit localhost:3000. The challenge page is blank but after a second or two, the challenge is solved by your browser and you can go through.
Roadmap
- Only demand proof-of-work if enough requests per second are coming in
- Dynamically adjust difficulty according to how many requests did go through
- Research if it's possible to cheaply rate-limit requests after they're through the proxy
- Actually compute something useful