Why Use Hairpin Nat?

Hairpin NAT allows the internal clients (192.168. 1.0/24) to reach the UNMS server using the public IP address assigned to the EdgeRouter

Is hairpin NAT secure?

1 Answer. Hairpin NAT just means that the external IP of the NAT router is also accessible from the internal IP address - see Wikipedia for more details. While one might probably construct an unusual use case where hair pinning is a security problem it is not a security problem in the usual use cases.

Why is hairpinning used?

Hairpinning, in a networking context, is the method where a packet travels to an interface, goes out towards the internet but instead of continuing on, makes a “hairpin turn”—just think of the everyday instrument used to hold a person's hair in place—and comes back in on the same interface.