Blog — Maurice Sobiera https://maurice.sobiera.com/en/blog/ Short versions of the IT case studies from BitBlade Solutions — faults, migrations and security incidents from practice, each linking to the full article. en-GB © 2026 Maurice Sobiera hand-written Two access points, two networks: why a PC lost its connection when roaming https://solutions.bitblade.io/blog/wlan-roaming-native-vlan-switchport/en/ https://solutions.bitblade.io/blog/wlan-roaming-native-vlan-switchport/en/ Sun, 27 Sep 2026 08:00:00 +0200 Same SSID, two VLANs: why a machine with a static IP fell out of the practice network every time it roamed. New IT for a dental practice: what a complete move really costs in time https://solutions.bitblade.io/blog/praxis-it-umzug-was-zeit-kostet/en/ https://solutions.bitblade.io/blog/praxis-it-umzug-was-zeit-kostet/en/ Sun, 27 Sep 2026 08:00:00 +0200 Five treatment rooms, a new server, a new network: a review of a complete overhaul and where the time actually goes. KIM after a PC replacement: four causes one after another https://solutions.bitblade.io/blog/kim-clientmodul-nach-pc-tausch/en/ https://solutions.bitblade.io/blog/kim-clientmodul-nach-pc-tausch/en/ Sun, 27 Sep 2026 08:00:00 +0200 Wrong host, missing DNS forwarding, missing connector configuration, missing certificate — four causes, resolved one layer at a time. “Connection to the server lost”: when the front-desk PC simply goes to sleep https://solutions.bitblade.io/blog/standby-netzwerkkarte-verbindungsabbrueche/en/ https://solutions.bitblade.io/blog/standby-netzwerkkarte-verbindungsabbrueche/en/ Sun, 27 Sep 2026 08:00:00 +0200 Standby and the network card's power management drop the database connection — three settings that belong on every practice workstation. The browser keeps serving the old version https://solutions.bitblade.io/blog/browser-cache-versionscheck-statische-tools/en/ https://solutions.bitblade.io/blog/browser-cache-versionscheck-statische-tools/en/ Mon, 21 Sep 2026 08:00:00 +0200 An updated web tool stays weeks out of date on the user's machine — why heuristic caching causes it, and how a version check reloads without touching stored data. The phone system only works partially https://solutions.bitblade.io/blog/ddos-malware-hinter-3cx-telefonausfall/en/ https://solutions.bitblade.io/blog/ddos-malware-hinter-3cx-telefonausfall/en/ Thu, 10 Sep 2026 08:00:00 +0200 A forensic case study: a 3CX system appeared broken, but the server beneath it had run DDoS malware unnoticed for seventeen days — four theories, one real culprit. When the trunk isn't broken, it's cancelled https://solutions.bitblade.io/blog/3cx-trunk-gekuendigt-routing-fehler/en/ https://solutions.bitblade.io/blog/3cx-trunk-gekuendigt-routing-fehler/en/ Wed, 09 Sep 2026 08:00:00 +0200 3CX case study: a cancelled SIP trunk and three routing rules without fallback disabled a customer's Switzerland connectivity for months. Keeping ISDN running on a Stiegeler fibre connection https://solutions.bitblade.io/blog/isdn-am-glasfaseranschluss/en/ https://solutions.bitblade.io/blog/isdn-am-glasfaseranschluss/en/ Wed, 09 Sep 2026 08:00:00 +0200 When switching to a fibre connection (FTTH), the legacy ISDN system loses its line. A used FRITZ!Box 7590 behind the provider's router solves it — with three caveats. One click in user management — and four evenings of troubleshooting https://solutions.bitblade.io/blog/kennwort-reset-dpapi-masterkey/en/ https://solutions.bitblade.io/blog/kennwort-reset-dpapi-masterkey/en/ Wed, 09 Sep 2026 08:00:00 +0200 Why an administrator-reset Windows password irrevocably destroys the DPAPI key chain — and a user profile had to be rebuilt from scratch. When a plugin refuses to register: the real reason behind MSI error 1603 https://solutions.bitblade.io/blog/msi-1603-msxml-plugin-registrierung/en/ https://solutions.bitblade.io/blog/msi-1603-msxml-plugin-registrierung/en/ Wed, 09 Sep 2026 08:00:00 +0200 A 3D plugin fails with error 1603 — system-level tracing reveals a missing, long-deprecated Windows component. When the server dies: an emergency migration to new hardware, step by step https://solutions.bitblade.io/blog/server-migration-hyperv-notfall/en/ https://solutions.bitblade.io/blog/server-migration-hyperv-notfall/en/ Wed, 09 Sep 2026 08:00:00 +0200 A total Hyper-V host failure, a day-current backup and two pitfalls: a ghost host and the wrong VLAN. Diagnosis without a mouse: tracing repeated software crashes with PowerShell https://solutions.bitblade.io/blog/sidexis-fehlerdiagnose-powershell/en/ https://solutions.bitblade.io/blog/sidexis-fehlerdiagnose-powershell/en/ Wed, 09 Sep 2026 08:00:00 +0200 A practice client, a repeatedly crashing Sidexis 4 — diagnosed entirely in PowerShell instead of the Event Viewer.