Method used to configure L2TP over IPSec on the USG6000 series

Due to protocol characteristics, the traditional L2TP has potential security risks. The L2TP over IPSec mechanism encapsulates packets based on the L2TP and then the IPSec. In this way, the L2TP over IPSec mechanism integrates advantages of two types of VPNs, implements user authentication and address allocation based on the L2TP, and makes up the disadvantages of the IPSec in terms of user authentication and authorization.

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