OpenVPN is an open-source solution for implementing Virtual Private Network to create point-to-point or site-to-site connections. In this article, we will learn how to configure OpenVPN in the pfSense firewall. PfSense is an open-source firewall/router based on FreeBSD currently supported by Netgate.
Prerequisite:
We have required at least two pfSense firewalls in the working state to configure OpenVPN in the pfSense firewall. Follow this article to install and initialize the pfSense firewall if you do not have yet.
In our current scenario, we have two different sites at different geological locations. Site A and Site B both having pfSense instances as there main Router and Firewall. Here we want to configure a secure OpenVPN tunnel so that the clients from Site A can communicate with the clients of Site B directly.
OpenVPN can configure in two ways, by using a shared key or using SSL/TLS. In this article, we use the Shared Key method to configure it.
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