Wed May 15 09:54:57 2013 Socket Buffers: R=[212992->131072] S=[212992->131072] Wed May 15 09:54:57 2013 ERROR: Cannot open TUN/TAP dev /dev/net/tun: No such device (errno=19) Wed May 15 09:54:57 2013 Exiting due to fatal error > demaio: I had the same problem with OpenVPN 2.3.1 AFAIK but because of a kernel update with pacman -Syu I had to reboot and the error was gone, but I am using systemd, so I don't know if this is related to the problem in your non-systemd setup. > Torxed: Yepp, rebooting fixed the issue. kernel was updated by another tech and a reboot was all it took. modinfo tun shows all i needed to see to be happy and safe and openvpn runs Giải pháp là chỉ cần reboot. Ref: https://bbs.archlinux.org/viewtopic.php?id=163377