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Mikrotik as OpenVPN client

Table of Contents

• Mikrotik OVPN-Client configuration
• VPS configuration
  • OpenVPN Server
  • Mikrotik WIFI monitoring
  • Whitelist DDNS Mikrotik IP iptables
• Files:

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Observium on Alpine Linux

WARNING: It's a draft. It doesn't cover security, permissions and other stuff.

Tested on Alpine Linux v3.20 / Observium CE 24.4

Installation

Derived from https://docs.observium.org/install_debian/

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Whitelist DDNS Mikrotik IP iptables

A python script solution to whitelist an IP address in iptables resolved with Mikrotik DDNS service (or any other).

• https://wiki.mikrotik.com/wiki/Manual:IP/Cloud
• https://help.mikrotik.com/docs/display/ROS/Cloud

In this example I have whitelisted Mikrotik DDNS IP to allow access to SSH and OpenVPN ports.

The script is scheduled in crontab to run every minute. It will resolve Mikrotik DDNS domain, flush the iptables WHITELIST chain and add the IP address if it changed.

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Update Lenovo ideapad Gaming 3 Laptop BIOS on Linux

WARNING: flashing the new BIOS can brick your laptop, DON'T do it if you don't know what you're doing or just for the sake of having the latest firmware. Make sure you actually need it and that both your laptop's power AC adapter is plugged in and the battery is fully charged.

Preamble

If you've got one the ideapad gaming 3 laptops you might face the problem with updating the BIOS, if your model isn't covered via fwupd.

There are ways to workaround it with some crazy shit magic tools, but the safest way is just use the Windows environent in the absence of a BIOS update file for Linux.

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Alpine 3.19 desktop setup

Install Alpine

1. Get Standard ISO from https://alpinelinux.org/downloads/
2. Boot the ISO and log in as root (no password required).
3. Run setup-alpine and install using defaults. For partition layout use sys or lvmsys.

Desktop Setup

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Building Quake III Arena on Linux from ioquake3 source

• https://ioquake3.org/
• https://github.com/ioquake/ioq3
• Quake III Arena on Steam

Requirements

1. Get quake3-latest-pk3s.zip from https://ioquake3.org/extras/patch-data/
2. Get pak0.pk3 from the original copy of the game

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Gentoo ARM64 IPv6 quick-ish setup on Hetzner Cloud

This guide explains how to waste your time installing Gentoo on a Hetzner Cloud VPS.

Not only that, I use IPv6-only connected machine and Arm64 at the same time. If I'm not insane, I don't know who is.

Also, yes, I'm skipping lots of configuration steps.

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How to copy an image without copying the image

Table of contents

• An image
• base64
• xxd

An image

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VyOS installation on Hetzner Cloud VPS

This guide explains how to install the VyOS Rolling Release (free nightly builds) on Hetzner Cloud VPS. This might also work for other VPS providers with the proper rescue system in place.

First log into Hetzner Cloud, switch to your VPS control panel, select Rescue -> Enable Rescue and Power Cycle. It takes up to 1 minute to boot into rescue mode. Your login details will be displayed in the control panel after you activate the console. You can also use previously defined SSH keys.

Hetzner Rescue SSH

Download and write the ISO image in the Rescue environment:

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FreeBSD on Hetzner Cloud VPS

This guide explains how to install the FreeBSD on Hetzner Cloud VPS. This might also work for other VPS providers with the proper rescue system in place.

Table of contents:

• 1. Rescue mode
• 2. Download and deploy FreeBSD
• 3. Post-installation

1. Rescue mode