SSL diagnostics tool for IIS

Microsoft released SSL diagnostics utility. I just found it mention in an article called Troubleshooting SSL in IIS. However, it has one drawback: it comes as installable MSI package. If you don’t want to install anything on your server, just run a one-time scan of it, I created a ZIP package with just the executable …

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Client certificate mapping in IIS 7 and impersonation

Recently, when migrating an application that uses client certificate authentication to IIS 7, we noticed that ASP.NET impersonation stopped working. Client was authenticated properly, but connection to database server was being established with machine account (DOMAIN\SERVERNAME$). We didn’t find any issue in the configuration, so we raised the case with Microsoft support. It turns out …

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I just love IPv6

I just found another reason to love IPv6. I spent 2 hours debugging why I can’t connect via RDP to a new server I built at home. Traces, firewall checks, vpings. Nothing – the port seemed closed from the network, even though it was wide open on the server OS. Finally I found the reason …

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