A fork of https://github.com/mora9715/haproxy_ddos_protector, a haproxy lua script allowing a holding page where users solve a captcha and proof-of-work (cpu intensive) task.
A fork and further development of a proof of concept from https://github.com/mora9715/haproxy_ddos_protector, a haproxy configuration and lua scripts allowing a holding page where users solve a captcha (think cloudflare CDN).
Intended to stop bots, spam, probably some forms of ddos, etc.
Some issues fixed and various improvements:
- Fix some bugs
- Fix a security issue where unsalted hash could let users bypass captcha
- Made the cookies not work permanently. They now expire based on a server-side bucket as part of the cookie hash, instead of client side expiry
- Added additional proof-of-work element to the challenge page, both pow+captcha must be completed
- Avoid using a hack to resolve domain names, usea backend in haproxy instead
- Add a proof-of-work element to the bot-check page as an optional weaker but more user-friendly mode
- Add more options to CLI for nocaptcha
- Add examples and support for .onion/tor using the haproxy PROXY protocol to provide some kind of "ip" discrimination of tor users (circuit identifiers)
- Add serving javascript files directly from haproxy with http-request return, so no extra backend is needed
- Improved the appearance of the challenge page
- More options to CLI for nocaptcha
- Fix a lot of bugs
- Fix resolving domain of hcaptcha, no longer uses a hack
- Fix multiple security issues that could result in bypassing the captcha
- Fix challenge cookies lasting forever, they are now limited by a bucket duration on server side
#### Screenshot
#### How to test
@ -19,11 +26,10 @@ Add some env vars to docker-compose file:
- HCAPTCHA_SITEKEY - your hcaptcha site key
- HCAPTCHA_SECRET - your hcaptcha secret key
- CAPTCHA_COOKIE_SECRET - random string, a salt for cookies
- POW_COOKIE_SECRET - random string a salt for cookies
- CAPTCHA_COOKIE_SECRET - random string, a salt for captcha cookies
- POW_COOKIE_SECRET - different random string, a salt for pow cookies
- RAY_ID - string to identify the haproxy node by
Run docker compose:
```bash
docker compose up
@ -34,18 +40,25 @@ docker compose up
DDoS-protection mode is enabled by default.
#### Installation
Before installing the tool, ensure that HaProxy is built with Lua support.
- Copy [scripts](src/scripts) to a folder accessible for HaProxy
Before installing the tool, ensure that HaProxy is built with Lua support (in package and ubuntu recommended PPA, it is.)
- Copy haproxy config and make sure that `lua-load` directive contains absolute path to [register.lua](src/scripts/register.lua)
- Copy [libs](src/libs) to a path where Lua looks for modules.
- Copy [ddos-cli](src/cli/ddos-cli) to any convenient path.
- Create `/etc/haproxy/domains_under_ddos.txt` with write permissions for HaProxy (feel free to change the map file path, update the HaProxy config correspondingly)
- If you want to try with tor, change the haproxy mount in docker-compose to the haproxy/haproxy.tor.cfg and include your hidden_service folder (with keys, etc) in the tor folder
- Copy or link [scripts](src/scripts) to /etc/haproxy/scripts
- Copy or link [libs](src/libs) to /etc/haproxy/libs (or a path where Lua looks for modules).
- Create `/etc/haproxy/ddos.map` for domains with protection mode enabled
- Create `/etc/haproxy/no_captcha.map` for domains with no captcha, only pow
If you want to try with tor and haproxy PROXY mode:
- Uncomment the tor service in `docker-compose.yml`
- Change the haproxy mount in `docker-compose.yml` for haproxy.cfg to haproxy.tor.cfg
- Add your hidden service folder (with keys, etc) to `tor/hidden_service`
- Run `docker-compose build` to rebuild the tor container with it.
#### CLI
The system comes with CLI. It can be used to manage global and per-domain protection.
The system comes with CLI. It can be used to manage protection global/per-domain and control nocaptcha mode.
Ensure that stat socket is configured in HaProxy for CLI support.
