After installing the April 2021 windows updates our GlobalProtect clients started having issues connecting where it would take several attempts to get connected normally seeing 3-4 connect then disconnect cycles before finally staying connected.
We confirmed that after uninstalling the windows update GlobalProtect behavior returned to normal, however these windows updates have critical security patches so uninstalling them isn't a good option. We are running GP 5.1.6 but have also tried 5.2.5 and 5.2.6 with the same results. We are running Windows 10 2004 and Windows 10 20H2.
Our GP setup has prelogin using a machine certificate and then login using client certificate along with usernname/password then MFA. We have tried fresh installs of GP and doing a reissue of the machine and client certs all give us the same behavior.
We have a Palo case open but so far they haven't found anything that has worked, I found the thread below so it looks like others are seeing the same problem and it might be related to DNS.
Has anyone else seen this behavior and found a work around or fix?
https://answers.microsoft.com/en-us/windows/forum/all/vpn-issue-with-update-kb5001330-global-protect...
