Try to improve the documentation concerning the "tun" interface. Take note that that kernel module must be loaded and IP forwarding enabled. Also add slight improvements to the "tunconfig" script so that sudo /sbin/ifconfig and sudo /sbin/iptables are really supported for current user if not root.
This form allows you to request diffs between any two revisions of this file. For each of the two "sides" of the diff, select a symbolic revision name using the selection box, or choose 'Use Text Field' and enter a numeric revision.