--- JUNOS 12.1X44-D45.2
set system syslog archive size 100k
set system syslog archive files 3
set system syslog user * any alert
set system syslog user * daemon critical
set system syslog user * interactive-commands error
set system syslog host 10.10.120.161 any any
set system syslog host 10.10.120.162 any any
set system syslog file messages any info
set system syslog file messages authorization info
set system syslog file messages match RT_Screen
set system syslog file interactive-commands interactive-commands error
set system syslog file traffic-log any alert
set system syslog file traffic-log match RT_FLOW_SESSION
set system syslog file default-log any warning
set system syslog file policy_session user info
set system syslog file policy_session match RT_FLOW
set system syslog file policy_session archive size 1000k
set system syslog file policy_session archive world-readable
set system syslog file policy_session structured-data
It looks like some logs are present in default-logs but those are mostly the FPC and inetd logs