ISA Server Blocking Access to My Web Server

I guess some of you have noticed that my blog has been offline again for the past four days, after a similar problem two weeks or so back. I’m sorry about this, it happens randomly, apparently because of some funny problem in Microsoft ISA Server 2004. The first time this happened, I knew at least that I had made changes to the firewall configuration at the point where the problem crept in, but this last time I’m pretty sure I didn’t do anything to the server at that time. In either case, ISA Server suddenly stopped routing in connections to my web server correctly – all access from inside, as well as other published services like SMTP continue to work flawlessly. I guess I’ll have to monitor this much more closely to find out what the problem is.

The only way I have found so far to get things back to normal is to reboot the server – no amount of fiddling without a reboot has been successful. Obviously I’ll try to find a way to stop this from happening, meanwhile if you have the impression that my blog is offline, feel free to drop me a mail quickly at and let me know.

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I used various blog hosting services since this blog was established in 2005, but unfortunately they turned out to be unreliable in the long term and comment threads were lost in unavoidable transitions. At this time I don't want to enable third-party services for comments since it has become obvious in recent years that these providers invariably monetize information about their visitors and users.

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