Troubleshooting an OpenVPN setup often comes down to reading and interpreting the OpenVPN log file correctly. In this recipe, no new features of OpenVPN will be introduced, but a detailed walk-through of an OpenVPN log file will be given. The setup from the recipe Troubleshooting MTU and tun-mtu issues earlier in this chapter will be used as a starting point.
Use the same setup as in the recipe Troubleshooting MTU and tun-mtu issues earlier in this chapter. For this recipe, the server computer was running CentOS 5 Linux and OpenVPN 2.1.1. The client was running Fedora 13 Linux and OpenVPN 2.1.1. Keep the configuration file, basic-udp-server.conf
, from the Chapter 2 recipe Server-side routing at hand. For the client, keep the configuration file, example7-5-client.conf
, from the recipe Troubleshooting MTU and tun-mtu issues at hand.