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Hierarchy Level

Release Information

Statement introduced in Junos OS Release 13.2.

deterministic-nat-configuration-log option introduced in Junos OS Release 17.3R1.

You can configure multiple system log hosts from Junos OS Release 17.4R1 onwards.

urlf-logs option introduced in Junos OS Release 18.3R1.


Set the class of applications to be logged to the system log.

Starting in Junos OS Release 17.4R1, you can configure up to a maximum of four system log servers (combination of local system log hosts and remote system log collectors) for each service set at the [edit services service-set service-set-name] hierarchy level.


class-nameEnter one of the following values:
  • alg-logs—Log application-level gateway events.

  • deterministic-nat-configuration-log—Log deterministic NAT sessions.

  • ids-logs—Log intrusion detection system events.

  • nat-logs—Log Network Address Translation events.

  • packet-logs—Log general packet-related events.

  • pcp-logs—Log Port Control Protocol events.

  • session-logs—Log session open and close events.

  • session-logs open—Log session open events only.

  • session-logs close—Log session close events.

  • urlf-logs—Log events for the filtering of DNS requests for blocklisted website domains.

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.