Re: BRE Clock Tampered With
By: Dumas Walker to ALL on Sat Oct 07 2023 09:47 am
When the door is opened, it shows a message about clock tampering and then closes down. Normally when this happens it means I have an issue with the clocks being out of sync between DOS, the VM it runs in, and the machine
the VM is running on. Once I fix that, the message goes away.
In this case, all three clocks are still in sync. Does anyone have any other suggestions? Thanks!
Usually the hypervisor is the clock master, but most Windows and Linux VMs will have NTP enabled for time synchronization.
I would disable NTP in the VM completely, and make sure you have VMware Tools installed to take upstream time. Any VM maintenance activities like snapshots, restores and migrations will momentarily stop the VMs clock.
High I/O, memory usage on the hypervisor and swappiness can cause this as well.
In the past I've encountered TLS negotiation issues because of this, and you'll typically notice other problems with clock skew.
HTH.
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