# lua-cs-bouncer > Lua module to allow ip (or not) from CrowdSec API. :warning: This library will only work with [lua-nginx-module](https://github.com/openresty/lua-nginx-module) This library is used by different bouncers : * [Nginx Bouncer](https://docs.crowdsec.net/docs/next/bouncers/nginx) * [OpenResty Bouncer](https://docs.crowdsec.net/docs/next/bouncers/openresty) * [Ingress Nginx Bouncer](https://docs.crowdsec.net/docs/next/bouncers/ingress-nginx)