Tag Archives: DNS

DNS and DNSSEC

Posted on 2024-06-04 by Gerhard

Many stories begin with “In the good old days …” but were the old days always so good? In the case of DNS, the old days go back a long way. You can read more about DNS itself at DNS … Continue reading →

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DNS at the core of the Internet

Posted on 2022-10-26 by Gerhard

DNS might not be the oldest, but is for sure one of the oldest and still very important services building the core of the Internet. The domain name service, or DNS for short, is one of the core services of … Continue reading →

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Certificate Transparency and unauthorized certificates

Posted on 2017-03-06 by Gerhard

I own a domain which was bought a few months back which is managed by CloudFlare’s service in DNS-only mode. As I intended to only use CloudFlare’s DNS service, I disabled every option except the DNS related features. You can imagin the surprise to see certificates issued for my domain without my knowledge. Continue reading →

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Migrate Baikal with minimal downtime

Posted on 2014-11-27 by Gerhard

Baikal is a CalDAV and CardDAV implementation based on PHP and MySQL. This post will explain how to migrate a Baikal installation from one server to another with minimum downtime. DNS entries can take up to 24 hours to be propagated to all DNS servers around … Continue reading →

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Migrate WordPress site with minimal downtime

Posted on 2014-09-20 by Gerhard

Migrating a Wordpress installation from one server to the other sounds like a simple task. Just move the files, copy the database for Wordpress and lets go. But when you start dealing with the DNS entries the whole story gets tricky. Continue reading →

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SPF and multiple domain mailserver

Posted on 2013-03-20 by Gerhard

We all hate spam, right? I think you all know the annoying emails, but what is worse than receiving emails? How about when emails you send to someone are for some reason detected as spam? This happened to me recently. … Continue reading →

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