Interactions with NAT

There are two ways that you can configure E-series routers to interact with Network Address Translation (NAT) devices in the network:

Configure the router to run in NAT passthrough mode by using the application l2tp-nat-passthrough command. For information, see NAT Passthrough Mode .
Configure the virtual router to enable NAT Traversal (NAT-T) by using the ipsec option nat-t command. For information, see NAT Traversal .