In addition to how to install OpenVPN on Fedora Core2, RedHat 7.2 needs more step to make OpenVPN works properly. The missing device in RedHat 7.2 will make OpenVPN unable to create TAP/TUN devices automatically. So the trick is to create a device for TUN.

mknod /dev/net/tun c 10 200
chmod go-r /dev/net/tun

Good luck.

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