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67 lines
2.6 KiB
Markdown
67 lines
2.6 KiB
Markdown
## HaProxy DDoS protection system PoC
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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.
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Intended to stop bots, spam, probably some forms of ddos, etc.
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Some issues fixed and various improvements:
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- Fix some bugs
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- Fix a security issue where unsalted hash could let users bypass captcha
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- 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
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- Added additional proof-of-work element to the challenge page, both pow+captcha must be completed
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- Avoid using a hack to resolve domain names, usea backend in haproxy instead
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- Improved the appearance of the challenge page
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#### How to test
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Add some env vars to docker-compose file:
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- HCAPTCHA_SITEKEY - your hcaptcha site key
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- HCAPTCHA_SECRET - your hcaptcha secret key
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- CAPTCHA_COOKIE_SECRET - random string, a salt for cookies
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- POW_COOKIE_SECRET - random string a salt for cookies
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Run docker compose:
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```bash
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docker compose up
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```
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- visit *http://127.0.0.1*
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DDoS-protection mode is enabled by default.
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#### Installation
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Before installing the tool, ensure that HaProxy is built with Lua support.
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- Copy [scripts](src/scripts) to a folder accessible for HaProxy
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- Copy haproxy config and make sure that `lua-load` directive contains absolute path to [register.lua](src/scripts/register.lua)
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- Copy [libs](src/libs) to a path where Lua looks for modules.
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- Copy [ddos-cli](src/cli/ddos-cli) to any convenient path.
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- Create `/usr/local/etc/haproxy/domains_under_ddos.txt` with write permissions for HaProxy (feel free to change the map file path, update the HaProxy config correspondingly)
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#### CLI (not maintained)
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The system comes with CLI. It can be used to manage global and per-domain protection.
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Ensure that stat socket is configured in HaProxy for CLI support.
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```bash
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Usage: ddos-cli <command> [options]
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Command line interface to manage per-domain and global DDoS protection.
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optional arguments:
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-h, --help Show this help message and exit.
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Commands:
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Global management:
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ddos-cli global status Show status of global server ddos mode.
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ddos-cli global enable Enable global ddos mode.
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ddos-cli global disable Disable global ddos mode.
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Domain management:
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ddos-cli domain list List all domains with ddos mode on.
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ddos-cli domain status <domain> Get ddos mode status for a domain.
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ddos-cli domain enable <domain> Enable ddos mode for a domain.
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ddos-cli domain disable <domain> Disable ddos mode for a domain.
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```
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