From HAProxy mailing list about http_buffer_request option https://www.mail-archive.com/haproxy@formilux.org/msg23074.html https://www.mail-archive.com/haproxy@

From HAProxy mailing list about http_buffer_request option https://www.mail-archive.com/haproxy@formilux.org/msg23074.html https://www.mail-archive.com/haproxy@formilux.org/msg23074.h... > In fact, with some app-servers (e.g. most Ruby/Rack servers, most Python servers, ...) the recommended setup is to put a fully buffering webserver in front. Due to it's design, HAProxy can not fill this role in all cases with arbitrarily large requests. A year ago I was evaluating recent version of HAProxy as buffering web server and successfully run slowloris attack against it. Thus switching from NGINX is not a straightforward operation and your blog post should mention http-buffer-request option and slow client problem.