> For the complete documentation index, see [llms.txt](https://book.konstantinsecurity.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://book.konstantinsecurity.com/readme/architect/load-balance/haproxy.md).

# HAProxy

<https://www.haproxy.org/>

HAProxy is a free, very fast and reliable reverse-proxy offering [high availability](http://en.wikipedia.org/wiki/High_availability), [load balancing](http://en.wikipedia.org/wiki/Load_balancer), and proxying for TCP and HTTP-based applications. It is particularly suited for very high traffic web sites and powers a significant portion of the world's most visited ones. Over the years it has become the de-facto standard opensource load balancer, is now shipped with most mainstream Linux distributions, and is often deployed by default in cloud platforms.

[Proxy methods](/readme/architect/load-balance/haproxy/proxy-methods.md)

[HAProxy for RDP](/readme/architect/load-balance/haproxy/haproxy-for-rdp.md)

[Payment gateway A/B test with HAProxy](/readme/architect/load-balance/haproxy/payment-gateway-a-b-test-with-haproxy.md)

[HAPRoxy for Percona or Galera](/readme/architect/load-balance/haproxy/haproxy-for-percona-or-galera.md)

[HA PostgreSQL with Patroni, Haproxy, Keepalived](/readme/architect/db/postgres/ha-postgresql-with-patroni-haproxy-keepalived.md)