Cisco, Mikrotik, pfSense site-to-site VPN with dynamic routing

Mikrotik: mDNS Repeater as Docker-Container on the Router (ARM,ARM64,X86)

IKEv2 VPN server for Windows and Apple clients on Raspberry Pi

Linux NetworkManager - Adding a search domain using nmcli or nmtui

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Frank 25 days agoLinuxUbuntu

How to install lsyncd directory synchronisation on Ubuntu LTS

As a developer, sometimes you need to synchronize a directory multiple times simultaneously, e.g., when a new file is written to the directory. And ...

Frank 27 days agoRedHat, Fedora, CentOS

Resolving Standby Problems Caused by USB Devices on Fedora Linux 41

Introduction Sometimes on Linux systems, certain USB devices can wake the computer from standby mode or prevent it from entering standby mode at all. ...

Frank on Mar 12, 2025SecuritySecurity Basics

CORS: Configure Cross-Origin Resource Sharing

Hello user, today I had the pleasure of working with CORS. What is CORS? Cross-Origin Resource Sharing (CORS) allows external web browsers or other web ...

Frank on Mar 12, 2025macOSDNS

Modifying the Hosts file in Mac OS X

Frequently asked, here is my mini tutorial on it. How do I change the 'hosts' file under macOS (from 10.5 Leopard to 15.3.1 Sequoia) to ...

Frank on Mar 06, 2025RedHat, Fedora, CentOSLinux Network

Linux NetworkManager - Adding a search domain using nmcli or nmtui

Actually, I just want to add my search domain to the network settings (search domain or dns search) under Arch-Linux and Fedora. This used to ...

colinardo on Feb 27, 2025DevelopmentMikroTik

Mikrotik Scripting - Quickly filter Router-Log by datetime

Sometimes you just want to get a reduced list of events from your router log filtered by date/time. There are numerous variants which can do ...

colinardo on Feb 20, 2025FirewallDevelopmentMikroTik

Mikrotik Scripting: Using the "place-before" parameter to place fw rule "after" other rule

This is a quick trick to programmatically place firewall rules after specific rules, not before. Normally you already have the place-before parameter when adding firewall ...

max on Feb 19, 2025MicrosoftWebbrowserWindows 11

Microsoft Edge no longer starts - Reset Edge

On a couple of occasions, after logging in to Edge, the browser itself would no longer start. The usual PC restart didn't help either. Tested ...

Frank on Feb 18, 2025macOS

How do I remove the Google Updater from macOS?

Who hasn't experienced this: you delete Google Chrome in macOS and yet the annoying ‘Google Updater has added objects that can run in the background’ ...

Frank on Feb 16, 2025PHP

Fast string compare function for PHP

Hello User, As a developer, I was faced with a challenge: I needed a fast but rough string comparison function for our website. It checks ...

Frank on Oct 12, 2024Web DevelopmentWebbrowserWebserver

Web server tuning: display WebP images directly in the browser

When switching to WebP images, I encountered a little unexpected behaviour: When linked directly, most browsers immediately start downloading WebP images instead of displaying them ...

AlexWisha on Apr 17, 2024ServerUbuntuLinux Network

How to set up and configure a Linux GRE tunnel

This guide will walk through the setup and configuration of a GRE tunnel between two Linux hosts. The two Linux hosts are running Ubuntu 22.04 ...

rubberman on Nov 11, 2023C, C++Development

CodeBlocks Portable with MinGW 32 and 64 bit on Windows

1. Introduction Hello community Besides VC, I'm reasonably happy with Code::Blocks as an IDE for C and C on Windows. While you probably can't convince ...

colinardo on Aug 28, 2023Encryption, CertificatesRouters, RoutingWindows NetworkWindows Server

NPS 802.1x Radius Authentication with EAP-TLS and strong certificate mapping for non domain joined devices

Introduction This tutorial describes the procedure how to use 802.1x EAP-TLS strong authentication especially for non domain joined devices on your LAN. So your device ...

colinardo on Aug 02, 2023MicrosoftMicrosoft OfficeOutlook Mail

Outlook 2016 + 2019 : Fix Meetings are created as Teams Online Meetings by default

Hi folks. Some of you may encounter the problem that older Outlook versions create new meetings by default as Online-Meetings when Microsoft Teams is installed ...

colinardo on Mar 28, 2023LAN, WAN, WirelessRouters, RoutingMikroTikDNS

Mikrotik: mDNS Repeater as Docker-Container on the Router (ARM,ARM64,X86)

TOC Preface mDNS repeating (Multicast DNS) on Mikrotik routers, a feature often requested, is not yet part of RouterOS itself at the time of writing ...

Frank on Jan 20, 2023LinuxMonitoring

Install Monitoring Uptime Kuma

I have been looking for a simple monitoring program for our website for some time. Thanks to the help of our users I found in ...

aqui on Jan 10, 2023NetworksSecurityFirewallRouters, Routing

Cisco router with zone based firewall and port forwarding

This tutorial is a short extension to the more comprehensive local . Due to several requests regarding port forwarding and combination with a secure DMZ ...

colinardo on Dec 30, 2022DevelopmentRouters, RoutingMikroTikDNS

Mikrotik Scripting: Resolve Domain to IPv6 Address

Hello Mikrotik users. Unfortunately Mikrotik does not provide an explicit function for resolving DNS names to IPv6 addresses. The :resolve function only returns a single ...

Frank on Nov 21, 2022DatabasesDevelopmentUbuntu

Ubuntu: Build Redisearch v2 module for Redis from source code

Here is a tutorial to compile the Redisearch module v2.x for Redis by yourself. At the moment you can get it as binary only as ...

aqui on Mar 14, 2022NetworksLAN, WAN, WirelessRouters, RoutingVPN

Cisco IPsec VPN with Mikrotik or FritzBox

Preamble The following tutorial is a quick overview how a site-to-site VPN access using the IPsec protocol can be realized with a Cisco IOS ...

aqui on Jan 28, 2022LinuxRouters, RoutingLinux NetworkVPN

IKEv2 VPN server for Windows and Apple clients on Raspberry Pi

Preamble The following tutorial did not claim to be fully comprehensive and the Raspberry Pi should be taken here as an example. It works ...

colinardo on Oct 16, 2021MicrosoftWindows 11

Windows 11 - Deploy Default Startmenu Layout

In Windows 11, the customization options for administrators have been further reduced. The previous possibility to customize the menu via the LayoutModification.xml file has been ...

colinardo on Oct 11, 2021MicrosoftWindows 11

Windows 11 - Activate classic context menu

Short tip for those who are annoyed by the new context menu under Windows 11. But there is a hack to define the classic menu ...

max on Oct 05, 2021MicrosoftWindows 11

Windows 11 Download Alternative to save an ISO or create a USB stick

For all who are looking for an alternative download possibility for Windows 11 (Release Build 22000.194) there is the Universal MediaCreationTool Script. The MediaCreationTool.bat is ...

Frank on Sep 21, 2021MicrosoftOutlook Mail

Add an Outlook 2019 IMAP account - No more username in settings - Solution

Another curiosity under Office 2019 just hit me hard. I wanted to add a normal IMAP/SMTP account to Outlook 2019. But that was so difficult ...

colinardo on Jul 10, 2021Other systemsMikroTik

RouterOS 7.1beta6 - GRE Tunnel does not work with non Mikrotik devices (fix)

Small advice for all users trying to create a simple GRE Tunnel to a non Mikotik device under the current beta version. If the tunnel ...

aqui on Jul 05, 2021NetworksLAN, WAN, WirelessNetworking Basics

Cisco WLAN access point 1142N, 2702, 3702 and 3800 for home use

Preamble Renewals of commercial WiFi enterprise networks cause of new standards and hence new required hardware (additional 6 GHz band etc.) result in the ...

aqui on Jul 02, 2021NetworksRouters, RoutingMikroTikVPN

Cisco, Mikrotik, pfSense site-to-site VPN with dynamic routing

Preamble The following tutorial is an addon to existing VPN tutorials on administrator.de. It describes a mixed hardware VPN site-to-site setup between Cisco and Mikrotik ...

Frank on Jun 24, 2021MicrosoftWindows 11

Windows 11: Set the Start menu back to the left

In the latest Windows 11 version, the new Start menu is displayed in the centre: You can easily set it back to the left side ...

Frank on Jun 22, 2021MicrosoftWindows 10

Windows 10 Core Isolation: Remove incompatible drivers

Hello, Actually, I just wanted to follow the Windows Security recommendations and under Settings -> Windows Security -> Core Isolation, turn on Memory Integrity. According ...

Frank on Jun 22, 2021LinuxRedHat, Fedora, CentOS

Install Powerline for Fedora

Powerline is a very practical optical extension for vim and the Linux shell (bash, zsh, tmux, IPython, Awesome and Qtile). You can find an overview ...

Dani on May 31, 2021Microsoft

Staying on top of Office 365 Updates

Moin! One of the main challenges when using Office 365 products and services is to stay aware of announcements, updates and upcoming features. This applies ...