Should the firewall device open the ports in a unidirectional or bidirectional manner Last updated Save as PDF Share Share Tweet Share Views:169Visibility:PublicVotes:0Category:fas-systemsSpecialty:coreLast Updated: Applies to ONTAP 9 Answer If the role of the storage system is both a server and a client, then the firewall needs to open the corresponding port bidirectionally Additional Information What ports need to be open to allow access to ONTAP and which port numbers are used for communications? Learn about port usage on the ONTAP network