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Einleitung Es ist nicht möglich, eine abschliessende Liste zu erstellen, die alle möglichen Szenarien abdeckt und den Umgang mit dem Mobiltelefon sicher macht. Daher ist der wichtigste Tip, seinen eigenen gesunden Menschenverstand zu benutzen und nicht blind ...

Secure Smartphones Mikro-Einführung, Lamberto Grippi LineageOS Ist ein ent-Googletes Android. Soweit wie möglich wurden die Verbindungen zu Google entfernt. Ohne Google-Layer gibt es keine Push-Notifications. Einige Apps sind jedoch von Google abhängig un...

Freiheitshandy - Warum ? Smartphones sind mit Trackern und Software ausgestattet, die den Benutzer überwachen und unnötig viele Informationen an die Hersteller senden. Eine Grafik veranschaulicht das: Das Problem liegt nicht am Smartphone selbst, sondern a...

Blackout - was ist das? Ein Blackout ist der Ausfall der Stromversorgung durch den staatlichen Versorger. Man kann sich durch eine Notstromversorgung dagegen absichern. Die Nachfolgenden Zeichnungen und Bilder dienen rein zur Illustration. Konkrete Beispiele...

Aktuell Derzeit werden diese Services über das Internet angeboten.  Services die eine Registrierung über das Self Service Portal benötigen Service Beschreibung Info Link Direktzugriff Self Services  Passwort Reset   Portal hCloud (File...

​Introduction It is possibly to set and synchronize the time in Linux automatically through the systemd service. It's the successor of NTP daemon. In my network the mt-engine01.simmy.ch provides system time. Hence the device can change, I created an DNS alias...

Introduction For same applications it might be necessary to use an external drive without adding this drive to a ZPool. E.g. if you want to copy from or to an external device. TrueNAS did not play well with this USB Bavkup solution. So finally I created anoth...

Introduction Sometimes a virtual machine cannot be stopped from the GUI. Resolution qm stop <number> Useful links https://bobcares.com/blog/proxmox-cant-stop-vm/  

Introduction A typical error on a PVE cluster is No Quorum error It can happen, when other machines of the cluster stop functioning. Resolution pvecm expect 1 Useful links No quorum error Definition Quorum

Introduction For some reasons Apple nurses a bug in the DNS resolver. This leads to the problem, that some FQDNs cannot be resolved correctly. The workaround is quite simple. Resolution sudo dscacheutil -flushcache sudo killall -HUP mDNSResponder

Introduction The Online Certificate Status Protocol (OCSP) is an Internet protocol used for obtaining the revocation status of an X.509 digital certificate.It is described in RFC 6960 and is on the Internet standards track. It was created as an alternative to...

Introduction System Integrity Protection (SIP) SIP protects MacOS from cyber attacks. However, it also prevents the installation of certain software. So it can become necessary to disable SIP temporarily. Boot into recovery mode Silicon M1, M2, M3 Shut do...

Intel based Reboot and press: Command-R: Start up from the built-in macOS Recovery System. Use this key combination to reinstall the latest macOS that was installed on your system, or to use the other apps in macOS Recovery. Option-Command-R: Start up fro...

Introduction It is possibly to set and synchronize the time in Linux automatically through the systemd service. It's the successor of NTP daemon. In my network the mt-engine01.simmy.ch provides system time. Hence the device can change, I created an DNS alias ...

Can't lock file https://dannyda.com/2020/05/1 1/how-to-fix-proxmox-pve-cant-lock-file-var-lock-qemu-server-lock-xxx-conf-got-timeout-proxmox-cant-shutdown-virtual-machine/ manual SSH: goto /run/lock/qemu-server delete lock-xxx.conf qm unlock xxx Simple s...

Hardware Gigabyte embedded AMD Epyc OS MX Linux 23.2 Libretto fluxbox based on Debian Linux 12 bookworm Configuration Installation Straight forward using these settings: Keyboard German encrypted disk with password filesystem btrfs disk with swap p...

Introduction Ubuntu caches DNS queries local. As long as the DNS address of a node does not change, this is very useful. Unless there is a change and the client should react very quickly, you have to flush/delete to cache. This manual describes hot to do that...

Introduction For testing purposes I am using Univention with bind9. The greater goal is to use AD/SAMBA from Univention. After testing for a couple of weeks suddenly some DNS addresses do not get resolved. The same problems occurred on Zentyal. So far I coul...

Introduction Despite the fact that Linux is Open Source and Linux it comes as a surprise that in the default installation are some hidden trackers and spy software. Hardening There is a script that will remove all malware. Originally written for Linux, but ...

UFW, or Uncomplicated Firewall, is a simplified firewall management interface that hides the complexity of lower-level packet filtering technologies such as iptables and nftables. If you’re looking to get started securing your network, and you’re not sure whic...