Which types of point-to-point VPN does the device support

The device supports GRE, IPSec, VLL, L2TP, and SSL VPN.

Starting from V200R002C00, the device supports L2TP and SSL VPN. Starting from V200R003C00, the device supports VLL.

GRE tunnels can encapsulate unicast and multicast packets.

IPSec tunnels can only encapsulate and encrypt unicast packets. To encrypt multicast packets, use GRE over IPSec.

As a point-to-point Layer 2 tunneling technology based on MPLS, VLL allows data packets to traverse networks using different media.

L2TP tunnels transmit PPP packets over the public network, and support user authentication and remote access, but have low security. You can use L2TP over IPSec to improve security.

Based on the HTTPS protocol, SSL VPN uses the data encryption, user identity authentication, and message integrity check mechanisms of the SSL protocol to ensure secure remote access to enterprise intranets.

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