Connecting via an HTTP proxy
As stated in the previous recipe, it is not possible to directly connect to an OpenVPN server under certain circumstances. In such cases, OpenVPN can connect to an OpenVPN server via an intermediary host known as a proxy. This recipe will outline how to access an OpenVPN server via an roxy.
The HTTP proxy used in this recipe is a Linux-based Apache httpd server with the mod_proxy module loaded. This module can be configured to allow CONNECT requests. This type of request is needed to connect to secure web servers (HTTPS) as well as to an OpenVPN server. If the CONNECT request is not allowed, then the HTTP proxy cannot be used to set up an OpenVPN connection.
Getting ready
We will use the following network layout:
Set up ...
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