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Installing and Configuring OpenVPN Server on CentOS using Webmin (part 1)

July 12th, 2011 Posted in Linux, Security, Windows

openvpnOur company have several branches and mobile users that need to access data in the head office. I need to provide VPN access for them. I want a solution for site-to-site VPN that is cost effective, stable, easy to use and configure with Graphical User Interface. After exploring the documentation in the net, I find the solution for my need. I use OpenVPN with Webmin running on CentOS server in the head office side. As for the branches side, I choose pfSense. And for the mobile users, I use OpenVPN client for Windows.

This article came out as my documentation on configuring the system. In this article, I provide step-by-step instruction for configuring an OpenVPN server running on CentOS using webmin, configuring OpenVPN client running on pfSense and OpenVPN client running on Windows 7.

In the head office, I put the OpenVPN server in a DMZ segmen, separate it from LAN segmen where the internal server and client reside. I use an UTM/firewall to separate the WAN, DMZ and our LANs. Using this, I can configure firewall rule between WN, DMZ and LAN segmen.

Here is the diagram of our network environment.
Site-to-site VPN using OpenVPN
In the next section, I will describe about the webmin and openvpn installation.

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