Blog
Practical guides on website monitoring, GDPR/EAA compliance, security headers, SEO and Core Web Vitals — from real work with XICTRAQ.
SLA Dispute: Whose Measurement Counts in the End
An availability promise without a measurement point, outage definition and reference period carries nothing in a dispute. What an SLA needs so the number holds.
Website Acceptance: Secure the Burden of Proof
Acceptance reverses the burden of proof. Which measured values belong in an acceptance report, how the dated annex is built, and what a reservation still saves.
Article 28 Processing Agreements for Monitoring Vendors
The eight obligations Article 28(3) sets out for a contract with a monitoring vendor, how sub-processors are authorised, what belongs in the record of processing activities and what happens to measurement data when the contract ends.
Sunset Headers: When an API Announces Its Own Shutdown
Sunset and Deprecation headers announce an API shutdown in the response header. What the two fields state, why they use two date formats and how a check rule turns them into lead time.
Broken Characters After Migration: Check Your Encoding
After a server move, a database migration or a system change, pages suddenly show Grüße instead of Grüße. Where the encoding is decided, which declaration takes precedence and how to measure the state after the switch.
BGP and RPKI: When Your Site Is Missing on Some Networks
The server is up and DNS answers, yet part of your audience does not arrive. What BGP, prefixes and RPKI have to do with it, and how to measure a partial outage.
Open Zone Transfer: When DNS Hands Out the Whole Zone
An open zone transfer hands over a domain's entire DNS record set in a single answer. How to check, restrict and continuously monitor AXFR.
Monitoring Double Opt-In: When Confirmation Mail Stalls
The confirmation flow breaks quietly: the form answers, the mail stalls, nobody complains. Five measuring points, matching deadlines and the evidence that consent requires.
Daylight Saving Time: The Hour That Comes Twice
What happens to cron, maintenance windows, on-call shifts and reports in the night of 25 October 2026 - and what can be checked beforehand so the doubled hour does not turn into quiet data damage.