# Message format parsed by panos-parser()

This section illustrates the most commonly used PAN-OS log format on the AxoSyslog side.

For information about customizing log format on the PAN-OS side, see [the relevant section of the PAN-OS® Administrator’s Guide](<https://docs.paloaltonetworks.com/pan-os/8-1/pan-os-admin/monitoring/use-syslog-for-monitoring/syslog-field-descriptions/custom-logevent-format.html>).

## Message format and log format

Using the `panos-parser()`, the parsed messages in AxoSyslog have the following general format:
```
 
       <PRI><TIMESTAMP> <HOST> <PALO-ALTO-fields-in-CSV-format>
    
```

There are several “types” of log formats in Palo Alto Networks PAN-OS. For example, the most commonly used [SYSTEM type](<https://docs.paloaltonetworks.com/pan-os/9-1/pan-os-admin/monitoring/use-syslog-for-monitoring/syslog-field-descriptions/system-log-fields.html>) has the following message format on the AxoSyslog side after parsing:
```
 
       <12>Apr 14 16:48:54 paloalto.test.net 1,2020/04/14 16:48:54,unknown,SYSTEM,auth,0,2020/04/14 16:48:54,,auth-fail,,0,0,general,medium,failed authentication for user 'admin'. Reason: Invalid username/password. From: 10.0.10.55.,1718,0x0,0,0,0,0,,paloalto
    
```

Last modified July 2, 2023: [Change highlight mode of code examples (2f8a959)](<https://github.com/axoflow/axosyslog-core-docs/commit/2f8a95937c6498193e7168ce8b0dc831e9f0f8ad>)