L2TP with IPsec

L2TP is commonly used in conjunction with IPsec in transport mode (to provide security).

Your Connect EZ supoorts L2TP with IPsec by configuring a transport-mode IPsec tunnel between the two endpoints, and then an L2TP tunnel with its LNS and LAC configured the same as the IPsec tunnel’s endpoints. See Configure an IPsec tunnel for information about configuring an IPsec tunnel.

Note The Connect EZ does not currently support the configuration of IPsec protocol/port traffic selectors. This means that you cannot restrict traffic on the IPsec tunnel to L2TP traffic (typically UDP port 1701).

While multiple L2TP clients are supported on the Connect EZ by configuring a separate LNS for each client, multiple clients behind a Network Address Translation (NAT) device are not supported, because they will all appear to have the same IP address.