I'm starting to configure my new ASA5510. Even though there are 4 Ethernet0 ports in back (Ethernet0/0 through Ethernet0/3), in ASDM, Configuration, Interfaces, I only see Ethernet0/0 through Ethernet0/2 and Management0/0. It does not allow me to add another port.
Where is my fourth Ethernet0 port?
You need "Security Plus" license to get more than 3 interafces.