O'Reilly logo

OpenVPN Cookbook - Second Edition by Jan Just Keijser

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

TUN versus TAP mismatches

A common mistake when setting up a VPN based on OpenVPN is the type of adapter that is used. If the server is configured to use a TUN-style network but a client is configured to use a TAP-style interface, then the VPN connection will fail. In this recipe, we will show what is typically seen when this common configuration error is made.

Getting ready

Set up the client and server certificates using the first recipe from Chapter 2Client-server IP-only Networks. For this recipe, the server computer was running CentOS 6 Linux and OpenVPN 2.3.11. The client was running Fedora 22 Linux and OpenVPN 2.3.11. Keep the configuration file, basic-udp-server.conf, from the Server-side routing recipe from Chapter 2Client-server IP-only ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required