Nginx
Nginx ("engine x") is a high-performance HTTP server and reverse proxy, as well as an IMAP/POP3 proxy server.

Nginx ("engine x") is a high-performance HTTP server and reverse proxy, as well as an IMAP/POP3 proxy server. Nginx was written by Igor Sysoev for Rambler.ru, Russia's second-most visited website, where it has been running in production for over two and a half years. Igor has released the source code under a BSD-like license. Although still in beta, Nginx is known for its stability, rich feature set, simple configuration, and low resource consumption.
Proxy and load balancer
Wang.se is using Nginx as a proxy and load balancer to Plone CMS.
Below is an example of a configuration for proxy and virtual hosts with Plone:
server {
listen 80;
server_name servername.com;
access_log logs/servername.access.log;
location / {
proxy_pass http://127.0.0.1:8000/VirtualHostBase/
http/servername.com:80/servername/VirtualHostRoot/;
include /usr/local/nginx/conf/proxy.conf;
}
}
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