For nonlocal maintenance sessions using SNMP, the Juniper SRX Services Gateway must use and securely configure SNMPv3 with SHA256 or higher to protect the integrity of maintenance and diagnostic communications.

Without cryptographic integrity protections, information can be altered by unauthorized users without detection. Nonlocal maintenance and diagnostic activities are activities conducted by individuals communicating through an external network (e.g., the internet) or internal network. The Juniper SRX allows the use of SNMP to monitor or query the device in support of diagnostic information. SNMP cannot be used to make configuration changes; however, it is a valuable diagnostic tool. SNMP is disabled by default and must be enabled for use. SNMPv3 is the DOD-required version but must be configured to be used securely.