Category: Technology

Fixing Intel Wi-Fi 6 AX200 latency and ping spikes in Linux

Recently, I purchased a mini-PC with an embedded Intel Wi-Fi 6 AX200 wireless chipset and installed Gentoo Linux on it. The reason I purchased the mini-PC was to replace my ageing music server (running MPD), but I also wanted to use it for playing retro video games through my entertainment centre. Everything went well with …

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Fix for delayed text messages (SMS and MMS) on Android

Recently, my mobile device manufacturer (OnePlus) decided to roll out updates to a new version of their Android-based operating system (OxygenOS) to use Android 11. After this particular update, I noticed a big delay in sending and receiving text messages (both SMS and MMS). At first I thought it was simply a temporary problem, but …

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LetsEncrypt SSL certificates for vhosts within the mail stack – via Postfix (SMTP) and Dovecot (IMAP)

For a long time, I didn’t care about using self-signed SSL certificates for the mail stack because 1) they still secured the connection to the server, and 2) those certificates weren’t seen or utilised by anyone other than me. However, for my datacentre infrastructure which houses clients’ websites and email, using self-signed or generic certificates …

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