Infrastruktur, erklärt
Wie DNS, Domains, Zertifikate und Monitoring wirklich funktionieren — und was du zuerst prüfst, wenn es klemmt. Keine Verkaufsargumente, keine Listicles.
Monitoring & Status09.09.2026 · 5 Min. Lesezeit
Infrastructure drift explained: what it is and how it creeps in
Infrastructure drift is the gap between what your config says and what's actually running. Here's how it happens, how tools detect it, and how to stay ahead of it.
Neueste
07.09.2026 · 6 Min. Lesezeit
IPv4 vs IPv6 explained: differences, dual-stack, and why it matters
04.09.2026 · 5 Min. Lesezeit
What is synthetic monitoring? Scripted checks vs real users explained
02.09.2026 · 6 Min. Lesezeit
Certificate transparency explained: what CT logs are and why they matter
26.08.2026 · 5 Min. Lesezeit
Why your emails go to spam (and how to fix it)
Frühere Artikel
Domains & DNS21.08.2026 · 6 Min. Lesezeit
What is DNSSEC and should you enable it?
DNSSEC stops attackers from forging DNS answers, but it's opt-in everywhere and easy to misconfigure. Here's the threat it solves, the trade-offs, and when to turn it on.
E-Mail & Zustellbarkeit19.08.2026 · 6 Min. Lesezeit
MX record not working: how to diagnose and fix broken mail routing
A step-by-step guide to diagnosing why your MX record isn't routing mail, covering priorities, trailing dots, CNAME targets and stale records.
Server & Cloud17.08.2026 · 5 Min. Lesezeit
How to secure your infrastructure in 2026: a practical checklist
A practitioner's checklist for securing DNS, TLS, servers and monitoring in 2026 — covering zero trust, DNSSEC, certificate automation and supply chain hygiene.
Domains & DNS14.08.2026 · 4 Min. Lesezeit
Why infrastructure inventory is important (and what to track)
An unmanaged domain, a forgotten server, or an expired certificate can take down production. Here's why infrastructure inventory is the foundation of reliable, secure operations.
Server & Cloud12.08.2026 · 5 Min. Lesezeit
When should you use cloud firewalls?
Cloud firewalls filter traffic before it reaches your server; host firewalls filter it after. Here's when to use each, and the sane defaults to start with.
Monitoring & Status10.08.2026 · 5 Min. Lesezeit
Ping vs HTTP vs HTTPS monitoring: what each check actually proves
Ping, HTTP and HTTPS checks answer different questions about uptime. Here's what each one actually proves and why relying on ping alone is risky.
Zertifikate & SSL07.08.2026 · 4 Min. Lesezeit
Why browsers show "Not Secure": causes and fixes
Understand exactly why Chrome, Firefox and Safari flag a site as "Not Secure" and how to fix each cause, from missing HTTPS to mixed content and bad certificates.
E-Mail & Zustellbarkeit05.08.2026 · 5 Min. Lesezeit
DMARC policy: none, quarantine or reject — which should you use?
A practical guide to choosing p=none, quarantine or reject in your DMARC record, and how to move to full enforcement without breaking legitimate mail.
Monitoring & Status03.08.2026 · 6 Min. Lesezeit
Infrastructure drift detection: get alerted the moment your DNS or config changes
Learn how drift detection catches out-of-band DNS and config changes before they cause an outage, and how to get alerted the moment it happens.
Domains & DNS31.07.2026 · 6 Min. Lesezeit
DNS propagation explained: why changes take time and how to check
DNS propagation isn't a global sync — it's TTL-based caching. Here's what actually controls the delay and how to check a change safely.
Domains & DNS29.07.2026 · 5 Min. Lesezeit
Cloudflare DNS not updating: causes and how to fix it
Changed a DNS record in Cloudflare and nothing seems different? Here's how to tell a caching delay apart from a real config problem, and how to fix each.
Domains & DNS27.07.2026 · 7 Min. Lesezeit
20 DNS security checks every domain should pass
A practical DNS security checklist covering DNSSEC, CAA, SPF/DKIM/DMARC, zone transfers and nameserver hygiene — with commands you can run today.
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