I have made occasional contributions to the Wireshark project for over five years now. I started with small documentation updates, and later I have added two new protocol dissectors (Zabbix and Z21) as well as improved some other dissectors. It can be several months between contributions though, so this post is my own memo about […]
When installing a Debian Linux virtual machine on a Proxmox Virtual Environment (PVE) host, the Debian installer automatically installs the VirtIO paravirtualization drivers and the QEMU guest agent so that no extra configurations are needed for full cooperation with the virtualization host. In Windows Server 2025 those drivers and utilities are not included. It means […]
In Python, sometimes you just need to catch all exceptions and show which one was it:
Let’s do some Docker networking with Zabbix proxies. The presented Docker configurations apply to other similar client-server applications as well, so you may find this useful even if you don’t use Zabbix. On this longish page: Preparations I’m running the Docker service on Debian Linux 12 on a virtual machine, with no special configurations. These […]
Proxmox Virtual Environment (PVE) has a built-in clustering feature that allows you to access all PVE nodes within the cluster by connecting to any of the nodes, by using a web browser or by connecting to the REST API. I’m using the out-of-the-box Zabbix template (Proxmox VE by HTTP) to monitor my three-node PVE cluster. […]
VRRP (Virtual Router Redundancy Protocol) is commonly used for providing first-hop IPv4 or IPv6 router (“default gateway”) redundancy for network-attached devices. Some network appliances like wireless LAN controllers use it to provide a virtual IP that can always be used for reaching the active member in the device cluster. VRRP can also be used on […]
When using the built-in SSO (Single Sign-On) in NetBox with Entra ID, the Active Directory (AD) group or role information for the users is not available out of the box. Based on the discussions in NetBox repo I tested and wrote down a short memo of getting the users’ groups usable in NetBox. In this […]
These notes have been tested with Proxmox Virtual Environment (PVE) 8.2.4, Debian 12 and cloud-init 22.4.2 (from Debian 12 packaging). First create a virtual machine and install Debian Linux on it normally, with all the additional tools and updates as required. I usually use the netinstall CD image from Debian. After completing the installation, for […]
I often need a Linux virtual machine for testing specific things. Debian Linux is my choice of Linux distribution, and I have wondered how much space does each installed package take in it, to possibly optimize the size of the VM if needed. I installed two VMs: The results after “sudo apt clean“: Installation Disk […]
I have been using VDR – the Video Disk Recorder – on my own Linux host for over 20 years. It has been the primary way of consuming broadcast TV content in our household since 2004. Until now my VDR setup has only been capable of using DVB-C channels in SD, due to the non-HD-capable […]