The border firewall rules were recently modified by a network administrator to allow access to a new service on Server 1 using the default https port. When testing
the new rules internal to the company network there are no issues and when testing from an external connection it does not work. The host running the service
does not receive external packets. Other services hosted on Server 1 are responding fine to to both internal and external connection attempts. Which of the
following is MOST likely configured improperly?

A.
Network access control lists

B.
802.1x

C.
Port security

D.
Implicit deny