Openvpn – the difference between those two IP addresses

openvpn

I am trying to install OpenVPN server on a CentOS machine, the sample configuration files don't make that much sense. Specifically it's server.conf that I find difficult to understand

What is the difference between following two IPs?

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Best Answer

The local IP address (the IP address that OpenVPN optionally listens on) is the network IP address. So if your office network is 192.168.1.0/24, then you would replace a.b.c.d with an IP address within that subnet range.

The subnet for VPN clients is different. It's a private IP address (range) that ONLY OpenVPN and its clients have access to.

So if you set the server (OpenVPN server) to 10.8.0.0 with a netmask of 255.255.255.0, then you're essentially saying that OpenVPN will hand out IP addresses to its clients within a 10.8.0.0/24 range (255 possible IP addresses after the server gets 10.8.0.1).

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