We have identified a critical issue that causes the WAF Virtual Appliance to lock up on reboot or an upgrade when the Critical Operating System Update feature is activated. This specifically occurs on some Hyper-V and VMware deployments.
The Critical OS Update feature downloads critical security hotfixes from a Cloud Repository and applies it automatically, which are otherwise provided through WAF Software Updates.
This potentially affects Hyper-V and VMware deployments when the Cloud-based Operating System update does not complete properly. This affects the Operating System’s ability to identify the root filesystem of the underlying OS causing the WAF Virtual Appliance to fail to boot.
We have temporarily disabled this ‘automatic’ update feature and security hotfixes will instead be provided as part of WAF Software hotfixes or patches. This is to ensure that every OS security update goes through stringent quality assurance process before being applied to the WAF deployments.
We highly recommend not to enable "Enable Scheduled Critical OS Update" option under System | Software Update. In addition, we strongly recommend backing up the current settings. If the deployment is affected due to this issue and WAF VM goes offline, please deploy new WAF OVA from MySonicWall Software Downloads and import the backed up settings.