Monthly Archives: May 2014
KnowledgeBase: Windows Server 2012 R2-based AD FS Proxy consumes 100% CPU
As part of the May 2014 Update Rollup, Microsoft has released an update for Windows Server 2012 R2-based Active Directory Federation Services (AD FS) Proxies, consuming 100% CPU. This leads to rejected logons and slow performance for colleagues trying to authenticate to the Active Directory Federation Services (AD FS) infrastructure. The situation The Active […]
KnowledgeBase: You cannot log on as a local administrator when you restart in Directory Services Repair Mode
As part of the May 2014 Update Rollup, Microsoft has fixed a problem that I hope has not been bugging any Active Directory Admin… On Windows Server 2012 and Windows Server 2012 R2-based Domain Controllers, an issue was identified that blocks access to the Directory Services Restore Mode (DSRM). The situation On Windows Server […]
Security Thoughts: Internet Explorer 8 Woes (CVE-2014-1770)
Last week, the Zero Day Initiative (ZDI) decided that Microsoft has had enough time within its coordinated vulnerability disclosure program to fix a vulnerability in Internet Explorer 8. This use-after-free vulnerability in Microsoft Internet Explorer 8 allows remote attackers to execute arbitrary code via crafted JavaScript code that interacts improperly with a CollectGarbage function call […]
KnowledgeBase: Colleagues with IE get Windows prompts when authenticating to AD FS behind TMG, forms-based authentication when using Chrome or FireFox
Today, a colleague came up to me to ask me a question on a weird situation he encountered while troubleshooting an Active Directory Federation Services (AD FS) implementation at a customer site. Note: We didn’t implement this situation, but after solving this challenge, we gave some great pointers to get the environment sorted. The […]
Security Thoughts: Passwords in Group Policy Preferences (CVE-2014-1812)
Last week, Microsoft released Security Bulletin MS04-025, including guidance and an update that resolves a publicly disclosed vulnerability in Microsoft Windows. The vulnerability could allow elevation of privilege if Active Directory Group Policy preferences are used to distribute passwords across the domain – a practice that could allow an attacker to retrieve and decrypt the […]
Named best Dutch Microsoft IT Pro by Compu’Train
During the 2014 Dutch TechDays, I participated in a Microsoft knowledge contest by Compu’Train, that dared Developers and IT Professionals to answer questions in their respective areas. As a mere joke I entered the competition, while Daniel continuously tried to distract me. Nonetheless, I answered the most IT Pro questions correctly of the 200 TechDays […]
Pictures of my presentation at TechEd North America 2014
Last week, I presented my first session ever on TechEd. I co-presented the session PCIT-B341 Upgrading Active Directory the Safe Way: Using Virtualization Technologies with Mike Resseler in the last presentation slot of TechEd North America 2014 in Houston. The story how I obtained the speaker position (in typical MVP manner) can be found in […]
I will be speaking at TechEd North America 2014
This week I’m in Houston for Microsoft’s 2014 TechEd North America event. Yesterday, at the TechExpo, I ran into a couple of familiar faces. I talked to Ben Armstrong for a while, together with Didier van Hoye, MVP Hyper-V. While we were getting drinks for the guys at the booths, we ran into Mike Resseler, […]
Keep up with TechEd North America 2014 (Houston) even when you’re not an attendee
Next week, Microsoft organizes TechEd North America in Houston. As I’ve written last week, I’ll be attending, but you might not have gotten your hands on a ticket… this event is sold out. However, you can still use your ginormous bandwidth (in contrast to the Hotel Wi-Fi in Houston) to be the first to get […]
I’m attending TechEd North America 2014
As a TechEd North America Alumni, I was thrilled to hear TechEd North America will be held in Houston, Texas this year from May 12, 2014 to May 16, 2014. Since “Everything is bigger in Texas”, I though the booths would be bigger as well. Of course, I applied to staff and speak at TechEd […]
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