Zyxel GS1900: Allow only one certain device on a certain port
The documentation of the Zyxel GS1900-48HP seems to be quite useless when it comes to security features. It does not explain what e.g. the Protected Port or similar features do in detail. Anyway, in...
View ArticleNagios-Plugins zur Überwachung von EIB-/KNX-Komponenten
Wenn es um die Überwachung der Basisfunktionen von KNX-Modulen geht, sind die Plugins von dieser Seite sehr empfehlenswert. Habe in meinem Dev-Blog ein weiteres Modul als Ergänzung zur Verfügung...
View ArticleNagios Plugin for monitoring EIB / KNX group addresses
You can monitor basic functionality of KNX components with the components you find on this site. Unfortunately, they don’t offer a script for reading KNX group addresses. According to...
View ArticleZugriffssicherheit am EIB-/KNX-Bus
Einer KNX-Installation, vor allem in Kombination mit KNX-IP-Gateway, stehen eine Unzahl an Angriffsmöglichkeiten gegenüber. Der Bus selbst bietet keinerlei Authentifizierungsmechanismen oder sonstige...
View ArticleMySQL: Find all references to a table before moving it
Scenario You have to move a MySQL database table to another database, but you have many other tables, functions, routines, events etc. which access it. Before moving it, it is not enough to find only...
View ArticleAndroid 4.0.4: Workaround for VPN issue
Scenario You want to configure a VPN connection to your firewall. It does not work on Android 4.0.4, but the same settings work in 4.1.x and above. Used in this example: VPN method L2TP IPsec PSK,...
View ArticleWDS / Active Directory: System UUID / GUID not unique
Problem WDS / PXE booting needs a unique GUID for every client workstation, e.g. if the PC has to be approved and given a name in the WDS console by the administrator. Sometimes it may happen that not...
View ArticleOpenELEC with Raspberry Pi: Wrong date and time
Problem For some sporadic models of Raspberry Pi there seems to be a problem with time sync. No matter which time server (local or Internet) is set in IPv4 or OE general settings, it does not...
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Bed occupancy sensor
Sorry, this entry is only available in German. For the sake of viewer convenience, the content is shown below in the alternative language. You may click the link to switch the active language. Was auf...
View ArticleHow to access Linux disk images under Windows
Scenario You have created an image of an SD card containing a Linux operating system. Afterwards you want to access and extract files of the image, but do not have a spare physical storage available or...
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