Running Siemens LOGO! Comfort V8.3 on macOS Monterey with Apple Silicon

I recently installed Siemens LOGO! Comfort V8.3 on macOS Monterey on a 14″ M1 MacBook Pro. This is not completely straight-forward as Monterey is not officially supported by Siemens. Using some tweaks, I got it working anyway. Please be aware that I didn’t test all features, so use this at your own risk.

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Blocking Exchange CVE-2022-41040 Attacks via HAProxy

If you’re using Microsoft Exchange on-premise and you want to protect your setup against the recent CVE-2022-41040 and CVE-2022-41082 zero-day vulnerabilities, you can follow Microsoft’s instructions to set up a rewrite rule in IIS. If your Exchange setup is behind HAProxy, you can also block the requests at the proxy level. This is especially useful

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Reverse-Engineering macOS Server APNS Push Certificate Retrieval

Since many years, I’m running my own email server, based on self-written SMTP and IMAP services, a MySQL database backend and a PHP-based webmail frontend. Ever since Apple released iPhone OS supporting push e-mail, I’ve been interested in getting it to work with my own email stack. My journey led me to Apple Open Source

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Welcome!

Welcome to my new blog! I’m going to use this blog as a collection of notes I consider interesting. The first blog post after this one has been migrated from my old, non-maintained blog hosted on Blogger.com.

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