SSL certificate monitoring pitfalls

Certificates are a fundamental part of the Internet’s security. At least since Let’s Encrypt, a free and automated Certificate Authority, has started its service, SSL is nearly used everywhere. To avoid Certificate issues and possible service outages, it’s a good idea to monitor the SSL certificates used by your services, especially as Let’s Encrypt certificates have a short lease time of 90 days. I’m using Prometheus to monitor my infrastructure, and for Prometheus there are multiple ways to get started.

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Color palettes on Game Boy Color and Advance

In my last article about modernizing a Game Boy Advance, one of my complaints was the ugly coloring of old Game Boy Classic games and I thought about buying an additional Game Boy Classic. But first I wanted to check if there was a mod for the Game Boy Advance to fix this problem.

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Docker port publishing for localhost bindings

While preparing a custom Docker image for a tool I wanted to use I encountered a problem that kept me busy for some time. The container could be built and started without any problems but the application in the container was simply not accessible via the published port. Even after minutes of debugging and checking (and re-checking over and over again) that the right port was exposed and the application in the container is listening on that port I was not able to get it to work… But I had a suspicion now.

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