I have a new installed Debian 6 system (Fujitsu Siemens tablet st4121) that runs fine so far. When I set up openvpn, the tun0 device is not created. /dev/net/tun exists, but ifconfig tells: sudo ifconfig tun0 tun0: Fehler beim Auslesen der Schnittstelleninformation: Gerät nicht gefunden (Device not found) the openvpn.conf is copied from a backup, it was working with Debian 5. In the logfile, I dont find any errors. What may be wrong?