"Operating System Loader failed signature verification"

[Fred Horan]

Hi DRBL folks,

I set up a DRBL SE with Debian v10.

I am using the primary ethernet port as the WAN. For a second ethernet port, I am using a USB to ethernet adapter. Set both ethernet ports are static (set up with /etc/network/interfaces).

Added 'deb http://free.nchc.org.tw/drbl-core drbl stable’ to /etc/apt/sources.list.
Executed ‘apt-get update’
Executed ‘apt-get install drbl’
Executed 'drblsrv -i'
Executed 'drblpush -i'

I am trying to deploy to a Windows laptop that is plugged into the USB to ethernet adapter of the DRBL server. I boot the laptop into uEFI PXE and get the following message:
"Operating System Loader failed signature verification. WARNING: the file may have been tampered with!"

I am not sure how to proceed with this. Do I need a security certificate? Thanks for any help you can offer. Please le know if you want me to include conf files

Best,
Fred

[Steven Shiau]

Try to turn off the secure boot for uEFI netboot in your client's BIOS.

Steven