Thanks a lot for all the help. I have now solved this issue.
fortinet.yml
- module: fortinet
firewall:
input:
processors:
- add_fields:
target: ''
fields:
fortinet.firewall.tz: '+1300'
enabled: true
var.input: udp
var.syslog_port: 5514
I also tried add_locale processor as below.
processors:
- add_locale: ~
This would be preferable as daylight saving changes the offset but add_locale uses "+13:00" as the format which the pipeline does not support.
I might use the script processor to modify the add_local value.