https://youtu.be/7skMFsRcRHY

1. Syslog
● Logging JUNOS devices events
○ Normal events
■ User login successful
■ BGP peer established etc.
○ Abnormal events
■ User login failure
■ Interface down
■ Excessive PFE temperature etc.

2. Facility
● Syslog categories
○ kernel JUNOS Kernel
○ user User process
○ daemon System process
○ authorization Authorization and authentication
○ ftp FTP process
○ ntp NTP process
○ security Security events
○ dfc Dynamic flow capture
○ external Local external applications

3. Facility
● Syslog categories
○ firewall Packet filtering results by Firewall Filter
○ pfe PFE evnets
○ conflict-log Invalid configurations
○ change-log Configuration changes
○ interactive-commands Issued CLI commands

4. Severity
● Syslog severity levels
○ emergency(0)
○ alert(1)
○ critical(2)
○ error(3)
○ warning(4)
○ notice(5)
○ info(6)
○ any(7) All severity levels
○ none(N/A) Disabling logging of a particular facility
More severe
less severe

5. Syslog configurations
● Log locally
○ set system syslog file filename authrization any
● Log remotely
○ set system syslog host 10.0.0.1 user info
● Display messages on the console
○ set system syslog console security alert

6. Show syslog contents
● Show locally saved syslog
○ > show log filename
○ > file show /var/log/filename