Specifies the protocol number.
Note: Lists with the official protocol and port numbers are available in the Internet at www.iana.org.
    - SNMP ID:
 - 2.70.5.11.2
 - Console path:
 - Setup > IPv6 > Firewall > Protocols
 - Possible values:
 Max. 3 characters from [0-9]
- Default:
 - empty