Just to add some more trivia on the subject:
Every device running the affected versions of CheckPoint VPN experienced this issue on the 10th July, Patch Tuesday patches for July haven't had time to propagate to any devices other than our limited test devices
Devices that were working ok on the 10th, found that a reboot caused the error to happen. Logging out and back in did not trigger it. Most of our devices running this VPN software reboot daily.
This puts the issue firmly on the 10th July.
We have tested on vanilla Windows OS installations, older build sequences, uninstalled AV, uninstalled and re-installed CheckPoint, blocked GPOs, removed App Controls, disabled Windows Firewall, installed vanilla CheckPoint E80 (non packaged version). Nothing worked.
Only "fix" we have is to install E81. Which we now have to do on all our mobile devices.
In our testing we have ruled out:
- Windows Patching
- Windows 10 OS version (affects 1703, 1709 and 1809)
- Re-install of E80, both our packaged version and a vanilla downloaded version
- App Controls (Appsense)
- Windows Firewall
This seemingly leaves just the E80 app as the cause of the issue. Is there a time related kill switch in it?? It seems to be the only thing that would explain why multiple customers are getting the same issue on the same day with no obvious cause.