Recently I have been implementing a software called Insight VM by Rapid 7 which runs reconnaissance on our network looking for vulnerabilities. Whilst this software is scanning, I was finding the Firewall would block it (like its supposed to) and then complain like crazy that it and its Network was being targeted. 27,000 email over night I decided to research how to solve this issue. Luckily Palo Alto have thought about this.
Here is how to implement Reconnaissance Protection Whitelist:
Select Network>Network Profiles>Zone Protection>Reconnaissance Protection to add a source address exclusion whitelist to your zone protection Profile.
Add an address to your source address exclusion whitelist. You add up to 20 IP addresses or netmask address objects.