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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 benötigen Service Beschreibung Info Link Direktzugriff hCloud (File Service, CalDAV, CardDAV) NextCloud Kollaborationsplattform hCloud - Next...

Introduction Company link Checkmk is a comprehensive solution for monitoring of applications, servers, and networks. This vast set of features was designed in collaboration with our customers over many years. Checkmk is easy to learn and use, but powerful ...

Installation on Linux Download You can download the current version here: Checkmk download After selecting the desired version it will create a command. Copy the command and execute in a Linux terminal. It looks like this: wget https://download.checkmk.co...

So far I couldn't make that working.  Useful link Docs: Securing the Webinterface Activating the Apache modules a2enmod ssl systemctl restart apache2 locate the certificate file: find /etc/apache2/ -type f -exec grep -Hn '^\s*SSLCertificate.*File' {} \;...

Download the Agent Setup --> Agents --> "Windows, Linux, Solaris, AIX" --> Related --> "Linux, Solaris, AIX" --> right click on the file --> Copy link address Install the Agent For Debian based systems wget http://syslog.simmy.ch/monitoring2/check_mk/agent...

Configuration on mikrotik IP --> SNMP --> Communities Create community simmy with high encryption Enable and select the trap community Configuration on checkmk I created a folder for all mikrotik devices. Use the same community and passwords as abo...

Configuration on Proxmox VE Create a group named read_only. Create a user named checkmk_user and add it to the group read_only. Add a group Permission: Install the Linux client. Configuration on checkmk Setup --> Hosts --> find and select propert...

​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...

Download the Agent Setup --> Agents --> "Windows, Linux, Solaris, AIX" --> Related --> "Linux, Solaris, AIX" --> right click on .deb file --> Copy link address Then you will have the address of the .deb file, which can be downloaded with wget: wget http://s...

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...