I just upgraded to the latest version, and now none of the google services will load, no Microsoft services... meaning no windows update, either.
I disabled web proxy, C-ICAP, ClamAV, and Intrusion detection. I get errors saying "can't connect" and "Security issues with site"
I verified it's the firewall by connecting to a different access point in front of the OPNSense appliance.
Maybe an Unbound issue. I'm evaluating strange effects in this direction, after updating to new releases in the past.
Try to restart the service. I will check this again, when 21.7. arrives ....
Very interesting as I have two identical appliances and both were updated to the 21.1.8. The one I use on my own network is the one that failed miserably. I simply used console to reset to default, then walked through the setup again, and all is working well. The second appliance, located elsewhere, simply needed to be rebooted a second time, and everything is working fine.