How to configure Reverse proxy using httpd configuration ?

Modules required and proxying confguration

Required modules for Reverse Proxy to Work : mod_proxy.so and mod_proxy_http.so

mod_proxy is the module that deals with proxying in Apache and mod_proxy_http handles connections with both http and https

Both the modules must be enabled in the config file

Main argument thats required in the httpd.conf file to enable proxying :

<Proxy *>

  Order deny,allow

  Allow from all

</Proxy>

Scenario

We have a domain called www.example.com and there are URLs called www.example.com/firsturl  and www.example.com/secondurl and /firsturl and /secondurl are different applications.

We want the public to requst www.example.com from internet but, URL's /firsturl and /secondurl must be fetched by the proxy server from internal private network hosts (application1 and application2) with private network address.

 

Write the below two rules in httpd.conf file :

ProxyPass /firsturl/ http://192.168.0.1/

ProxyPassReverse /firsturl/ http://192.168.0.1/

ProxyPass /secondurl/ http://192.168.0.2/

ProxyPassReverse /secondurl/ http://192.168.0.2/

It will fetch data for www.example.com/firsturl from http://192.168.0.1/ and www.example.com/secondurl from http://192.168.0.2/

Directives

Proxypass: This directive asks the apache server to fetch data for /firsturl from http://192.168.0.1/

ProxyPassReverse: This directive rewrites the original URL available to the Internet when the traffic is send back.