Information
Set Antivirus Update Schedule to download and install updates hourly.
Rationale:
New antivirus definitions may be released at any time. With an hourly update schedule, the firewall can ensure threats with new definitions are quickly mitigated. A daily update schedule could leave an organization vulnerable to a known virus for nearly 24 hours, in a worst-case scenario. Setting an appropriate threshold value reduces the risk of a bad definition file negatively affecting traffic.
Solution
Navigate to Device > Dynamic Updates > Antivirus Update Schedule.
Set Action to Download and Install.
Set Recurrence to Hourly.
Default Value:
Not Configured
References:
'Tips for Managing Content Updates' - https://live.paloaltonetworks.com/docs/DOC-1578
'PAN-OS Administrator's Guide 9.0 (English) -Dynamic Content Updates' - https://docs.paloaltonetworks.com/pan-os/9-0/pan-os-admin/software-and-content-updates/dynamic-content-updates.html
'PAN-OS Administrator's Guide 9.0 (English) - Install Content Updates' - https://docs.paloaltonetworks.com/pan-os/9-0/pan-os-admin/software-and-content-updates/install-content-and-software-updates.html