Jean's Blog – Page 3 – Thinking too much is like swinging – you're busy but you're not getting anywhere.

Encryption of ZFS volumes using a remote / external key-system written in PHP

I thought a long time about what security benefits I have if I store the encryption key of a volume on the same system (locally). Let me share some of these thoughts with you. Then I’ll show you my approach using a self-written key-system in PHP (using RedBeanPHP and Sqlite) and finally I’ll show you how to use this with ZFS.

Setting up MinIO in AWS Lightsail

MinIO is a high performance, s3 compatible object storage. I’m using it for some years now. In this article I’ll show you how to setup your own MinIO stack using Amazon Lightsail.

Nextcloud Linux Client on a Chromebook (ARM / aarch64)

Short explanation on how to get the nextcloud linux client working in a chromebook. This is because the android desktop client does not offer two-way synchronization as of now.

Using Nextcloud with MinIO

MinIO is an object storage. I like it a lot and was thinking about using it with Nextcloud. Let’s see

Nextcloud migrate to PostgreSQL

Also getting the famous “1213 Deadlock found when trying to get lock; try restarting transaction”? A few users reported switching to PostgreSQL fixed it. While I did not believe at first… Yes… It solved that issue for me as well.

Setting up Nextcloud

Just a quick guide how I do install Nextcloud. This is Nextcloud 25.0.1 with PHP 8.1 on Debian Bullseye with Redis, APCu and MariaDB.

Amavis’ cool features

I guess that most people use amavisd-new together with spamassassin and for example ClamAV. Probably a few more use features like DKIM verification and signing with amavis. However, there are some features which aren’t found in the usual howtos. Here are some of them.

systemd multi-instance Redis

Instead of working with one redis server instance I would like to use multiple instances of redis because that way I can limit memory and do additional tuning for the instances. systemd can help on this. I will create an instance for amavisd-new in this guide.

How I configure my sites in NGINX

Tuning / Improving your security using external online tools would be another possible headline for this article. There are a few pages I regularly use to optimize my configuration. Here’s a small guide.

Setting up amavisd-new and amavisd-milter

Amavis is not a new tool, in fact AMaViS started as a shell program back in 1997. Imagine, at that time I was 12 and kept annoying people on IRC. Anyway. In this article I’ll show you how to set it up, with a milter and policy banks. I also tell you about after- and before-queue filtering with Postfix and show you how to use both.