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  1. Andy

    Converting HFS+ to APFS

    Follow this guide to easily and safely convert your HFS+ volume to an APFS volume. Go to Disk Utility and Unmount the volume you want to convert. Right-click the volume and select Convert to APFS (this option will only available if the volume is unmounted) (The screenshot above showing...
  2. Andy

    MikroTik port 53 DNS service DDoS attack mitigation and prevention

    If you found a router that's having botnet attacks on port 53 (DNS), you can use this script to mitigate the attack: /ip firewall filter add chain=input in-interface=pppoe-out1-ISP protocol=udp dst-port=53 action=drop add chain=input in-interface=pppoe-out1-ISP protocol=tcp dst-port=53...
  3. Andy

    Compile ZNC push mod for Igloo IRC

    Here's how to compile ZNC push mod for Igloo IRC 💡 Tested on ZNC 1.8.2 and it worked 👍 [email protected]:~/.local/bin$ wget https://git.jordanko.ch/Igloo/Push/raw/master/Makefile --2020-10-23 14:08:30-- https://git.jordanko.ch/Igloo/Push/raw/master/Makefile Resolving git.jordanko.ch...
  4. Andy

    How to add AzureAD\User to Administrators group

    You can do this via command line: Login to the PC as the Azure AD user you want to be a local admin. This gets the GUID onto the PC. Log out as that user and login as a local admin user. Open a command prompt as Administrator and using the command line, add the user to the administrators group...
  5. Andy

    MikroTik DDoS Detection & Blocking Firewall Filter Rule

    I found this method is the best way to prevent DDoS Attack from your users to attacked resources and drop DDoS directed to your clients. First, we catch all new connections and send them to dedicated firewall chain: /ip firewall filter add chain=forward connection-state=new action=jump...
  6. Andy

    Upgrade Ubuntu 18.04 Bionic to Ubuntu 20.04 Focal

    In this tutorial, we'll learn how to upgrade Ubuntu Linux 18.04 Bionic Beaver to Ubuntu 20.04 Focal Fossa, as well as what to expect during the upgrade process, etc. It's a good idea that all packages are up-to-date before proceeding with the distro upgrade: sudo apt update sudo apt upgrade...
  7. Andy

    Disable Boot Splash Screen on Pop!_OS 20.04 Desktop Linux

    Pop!_OS uses kernelstub to manage the boot parameters and kernel images, instead of GRUB. Follow the commands below to disable boot splash screen and show the boot verbose on: sudo kernelstub --print-config [email protected]:~$ sudo kernelstub --print-config [sudo] password for andy: kernelstub.Config...
  8. Andy

    How to delete user on RHEL 8 / CentOS 8 Linux

    Deleting user on RHEL 8 / CentOS 8 Linux system can be accomplished using the userdel command. In this tutorial you will learn: How to delete user on RHEL 8 / CentOS 8. How to force user deletion. How to delete the user as well as its home directory. And here are the steps: Take a note of...
  9. Andy

    How to Disable IPv6 on Ubuntu Linux

    This tutorial will guide you with the exact commands/steps you need to run on your server in order to disable IPv6 connectivity on your Ubuntu Server, all in under one minute! Log into your Ubuntu server via console or SSH as root (Use the command sudo -s in terminal) Open /etc/sysctl.conf...
  10. Andy

    Disable Automatic Updates on Ubuntu 20.04 Focal Fossa Linux

    Follow these easy steps to disable automatic updates on Ubuntu 20.04 Focal Fossa 🥳 Privileged access to your Ubuntu System as root or via sudo command is required 🔓 Conventions # - requires given linux commands to be executed with root privileges either directly as a root user or by use of...
  11. Andy

    How to display dock on Pop!_OS 20.04 LTS

    We can get a dock in Pop!_OS by installing a GNOME extension called Dash to Dock, you can adjust this preference, move the dock to the bottom of the screen, and more. Follow the step-by-step guide down below to install a dock on your Pop!_OS: To install Dash to Dock on Pop!_OS, visit the...
  12. Andy

    Take your email sending credibility even further by implementing DKIM & DMARC

    Having a properly configured SPF is essential, in this article we'll learn how to improve your email sending credibility even further by implementing DKIM & DMARC. Assuming you already have SPF configured properly on your domain if you haven't, click here to learn more 💡 Without further ado...
  13. Andy

    Computer assembly general checklist

    I have compiled a computer assembly checklist that I use, feel free to use my template down below: RAM and SSD/HDD installed and secured correctly SSD/HDD SATA and power cable connected or M.2/NVME securely fitted Power-On Self-Test confirmed Correct CPU type for model detected in BIOS Correct...
  14. Andy

    Install SSL certificate on DirectAdmin hostname using Let's Encrypt

    Follow the tutorial down below to enhance your DirectAdmin Login Page with Let's Encrypt SSL certificate: cd /usr/local/directadmin/scripts ./letsencrypt.sh request_single your.server-hostname.com 4096 The script above will also install the new cert/key/ca files in all respective global places...
  15. Andy

    Set IP address, join domain, configure firewall, rename and activate computer using command prompt

    Here are the essentials commands you need to configure your Windows Server Core instance. Follow this tutorial to carry on these tasks with command prompt: Set a static IP address At a command prompt, type: netsh interface ipv4 show interfaces Make a note of the number shown in the "Idx"...
  16. Andy

    Touch ID on my iPhone/iPad doesn't work [SOLVED]

    Follow these steps to remedy your issue. If your Touch ID doesn't work, are you currently charging your device? If so, try to unplug your iPhone/iPad from the charger. If your Touch ID works after unplugging the charger, then the problem was caused by your charger (or your USB charging cable...
  17. Andy

    MikroTik Site-to-Site IPsec Tunnel for RouterOS v6.45+

    Follow this easy seven steps, and you'll get your MikroTik IPsec Site-to-Site Tunnel established 🤓 This is the updated version of my original easy guide on how to set up MikroTik Site-to-Site IPsec Tunnel. Tested on RouterOS v6.45.9 and it's fully working & functional. If you are working from...
  18. Andy

    Implementing DNS over HTTPS (DoH) on MikroTik routers to avoid man in the middle attacks

    Starting from RouterOS version v6.47 it is possible to use DNS over HTTPS (DoH). DoH uses the HTTPS protocol to send and receive DNS requests for better data integrity. Its main goal is to provide privacy by eliminating the man in the middle attacks (MITM). Currently, DoH is not compatible with...
  19. Andy

    How to reset Windows Administrator password [SOLVED]

    Follow this guide if you lost all of your Windows Administrator passwords. As one of the official mirror of Hiren's BootCD, we'd encourage you to use Hiren to carry this task as it's a super easy and relatively safe process. Download Hiren from the following link...
  20. Andy

    How to clear DNS cache on my Mac? [Solved]

    Step 1: Open the Terminal Navigate to Applications -> Utilities -> Terminal Step 2: Flush DNS - Type the following command and hit enter. Mac OS X Yosemite and later sudo killall -HUP mDNSResponder Mac OS X Yosemite v10.10 through v10.10.3 sudo discoveryutil mdnsflushcache Mac OS X Mavericks...
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