Introduction to reverse proxying

　　the proxy module

　　　　legacy servers with cookies

　　the upstream module

　　　　keepalive connections

　　　　load-balancing algorithms

Types of upstream servers

　　single upstream server

　　multiple upstream servers

　　non-HTTP upstream servers

　　　　memcached upstream servers

　　　　FastCGI upstream servers

　　　　SCGI upstream servers

　　　　uWSGI upstream servers

Converting an "if"-fy configuration to a more modern interpretation

Using error documents to handle upstream problems

Determing the client's real IP address