published: 4th of February 2019
3 steps to configure Syslog.
Log to a local file. Logs are stored in the /var/log directory.
Define a logging policy.
set system syslog user * any emergency
set system syslog file messages any notice
set system syslog file messages authorization info
set system syslog file interactive-commands interactive-commands any
Define remote logging servers.
set system syslog host syslog-server-1.domain any info
set system syslog host syslog-server-2.domain any info
Define a logging source address.
set system syslog source-address 10.255.1.1
Show log file.
show log messages
show log interactive-commands
Start tailing a log file.
monitor start interactive-commands
Stop tailing a log file.
monitor stop
https://www.juniper.net/documentation/en_US/junos/topics/example/syslog-configuring-qfx-series.html