Jesper's Blog

Obligatory file photo: I am a Senior Security Strategist in the Security Technology Unit at Microsoft. My job is to explain to our customers how to run Microsoft products securely, and to the extent that it is needed, help the product groups figu

December, 2005

  • Blocking certain extensions in ISA server

    For some reason I decided that today was a good day to figure out how to block certain file extensions from being accessible over the web. This could be very useful, for instance, if you are trying to prevent a particular exploit that utilizes a particular...
  • Weird ISA error, and apparent solution

    This morning when I tried to use FrontPage (don't even start) to edit one of my web sites, I was faced with this error: Error Code: 500 Internal Server Error. Internet Control Message Protocol (ICMP) network is unreachable. For more information about...
  • Getting OMA to work with SBS Premium and WM 5.0

    Being that I am on vacation, I just had to take a break from all the relaxing and get my new K-JAM/QTek 9100 to connect to OMA on my SBS server. These devices have not been out very long and run the latest version of Windows Mobile (nee, Windows CE),...
  • Biometrics

    Apart from the obvious issues with biometric authentication (like the fact that revoking them is quite onerous and the fact that they are actually detachable) I have never really been much of a fan of them for other reasons, like the issue that they always...
  • Good Enough Security

    At some point about six weeks ago I once again was hit with arguments that pointed to people considering security as black and white; you are either secure or you are not. Security is not now, nor has it ever been, a binary decision. There are a lot of...
  • Tools and other new stuff from the book now available

    When we wrote Protect Your Windows Network we put some tools on the CD. The tools are now posted on the website: http://www.protectyourwindowsnetwork.com . There is even a new version of the passgen tool available there. The new version supports setting...