In cases when no other option is at hand, it’s sometimes necessary to use pure L2TP to connect to PandaPow. On both Mac OS X and iOS this is not possible, out of the box, since L2TP is always combined with IPSec. What you need to do then is to disable IPSec. This is done as follows:
Create a file at the following location, if it doesn’t already exist:
/etc/ppp/options
Note that on iOS this can only be done if your device is “jailbroken”.
In this file add the following 2 lines:
plugin L2TP.ppp
l2tpnoipsec
After this is done, whenever you use L2TP/IPSec only L2TP is used.