Fortigate port forwards gotcha

Found out today

If you delete a port forward, even if it’s not in use, Fortgate clears the session table so the remaining port forwards STOP WORKING until a port forward is re-created or (i suspect) the firewall is rebooted.

Lesson learned:

Don’t reconfigure port forwards during business hours. Especially if the customer uses RdWeb or NextCloud as part of their work-from-home strategy