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Month: July 2018

Exadata Security: the joy of PXE and UEFI: Secure boot violation

Exadata Security: the joy of PXE and UEFI: Secure boot violation

Today I had the honour to join my colleague Freek D’Hooge (find him here: @dhoogfr )in the datacenter. Task for today, reimage an 1/8th X7 Exadata using PXE. Andy (Colvin) warned me already that, when trying to reimage them, they are now using UEFI – boot. Knowing this in advance, this would be an #exatastic day. As usual, Andy was right. Trying to boot one of the cells on the pxe “the old method” resulted in: “Secure boot violation: Invalid signature…

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Tunnelblick ovpn client for Mac os High Sierra

Tunnelblick ovpn client for Mac os High Sierra

This weekend I was playing around with Openvpn to a new site. I use Tunnelblick for this, but this time was the first time after I had upgraded my Mac to High Sierra (10.13.5). Suddenly my vpn connections didn’t want to load anymore. Tunnelblick threw these errors to me:

I was running a beta, so first thing was to install the stable release, but the message remained. This link: https://tunnelblick.net/cKextLoadError.html helped me. In high sierra to use or add modules…

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