Hey there Graham,
Nice detail on the post. This is an issue we are aware of and has to do with some registry settings for IE (which would affect, Chrome, firefox,etc.)
Please follow this link:
I'd make the modifications for both the x32 and x64 this is really meant for the version of the browser you are running vs your OS. The patch, however should already be applied to newer versions just need to make the registry modifications. Also, will need to restart your browser.
Let me know if this fixes the issue.
As Michael responded you need to enable Web Browser to use Kerberos authentication over non standard port (Intel AMT ports).
You need to do it for any version of MS Explorer anyway - see more details at Intel AMT SDK's implementation and reference guide -online version:
(BTW - check this site home - it provides very useful explanation of AMT technology).
So you need to add two registry entries -you can use following commands, make sure you have enabled "Enable Integrated Windows Authentication" (in Internet Options > Advanced) restart Web Browser and enjoy your Kerberos access.
Intel EMEA Biz Client Technical Sales Specialist
Following your replies I found some other threads related to this - it seems quite a common problem. Anyway I found this thread where Dariusz has provided the Reg add commands. I entered these and confirmed that I have integrated auth enabled within IE advanced settings. I can now log on to Web UI using IE. However I still have the same error message in Chrome & Firefox. It is not the end of the world as we can use IE but I just wondered why this might be?
Many thanks for your continued help. Happy to say we are now mostly up and running with AMT.