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Setup nut and netdata on Ubuntu

In this document, I will explain how to setup nut (Network UPS Tools) on Ubuntu 18.04 and 20.04.

It is basically the next chapter of my previous gist, Upgrade nut on Ubuntu 18.04.

I'll only document USB connected UPS and not the other supported connection modes.

Install required dependencies

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Gist to support https://www.youtube.com/watch?v=vMlUVDcriww

Documentation

• https://github.com/GoogleContainerTools/kaniko
• https://docs.cloudbees.com/docs/cloudbees-ci/latest/cloud-admin-guide/using-kaniko

kubectl command

• kubectl create secret docker-registry docker-credentials --docker-username=[userid] --docker-password=[Docker Hub access token] --docker-email=[user email address] --namespace jenkins

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Server

iptables -A FORWARD -i wg0 -o YOUR_INTERFACE -s 10.200.200.0/24 -j ACCEPT
iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -t nat -A POSTROUTING -o YOUR_INTERFACE -s 10.200.200.0/24 -j MASQUERADE

systemd-networkd

see vpn.netdev and vpn.network.

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WireGuard Site-to-Site

Accessing a subnet that is behind a WireGuard client using a site-to-site setup

Problem Summary

We want to access a local subnet remotely, but it is behind a NAT firewall and we can't setup port forwarding. Outgoing connections work, but all incoming connections get DROPPED by the ISP's routing policy.

Solution Summary

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E-Commerce c-lightning node on Digital Ocean

Prerequisites

• based on small Digital Ocean VPS (1CPU / 1GB RAM) with Ubuntu 16.04
• SSH keys are recommended, but not described here
• (sub) domain name necessary for SSL certificate

UFW & basic stuff

Login as "root"

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Routing plex traffic through an SSH tunnel

This guide creates a reverse SSH tunnel to route all Plex server traffic through it.

Step 2 is done on the tunnel, all other steps are done on the plex server.

1. Setup SSH keys (if you already have key based authenthication setup skip to step 2)

On plex server:

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#!/bin/bash

# Copyright © 2021 Chirag Bhatia

# Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

# The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

# THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOF

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1. install

brew install tor
brew install privoxy

2. copy and modify config file

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FROM alpine

RUN apk add --update --no-cache nodejs
RUN npm i -g yarn

ADD package.json yarn.lock /tmp/
ADD .yarn-cache.tgz /

RUN cd /tmp && yarn
RUN mkdir -p /service && cd /service && ln -s /tmp/node_modules

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(* Note 1: The 1 after menu bar may need to be changed to 2 when using multiple monitors *)
(* Note 2: For 10.11 and newer “NotificationCenter” is now spelled “Notification Center”*)

tell application "System Events"
	tell application process "SystemUIServer"
		try
			if exists menu bar item "Notification Center, Do Not Disturb enabled" of menu bar 1 of application process "SystemUIServer" of application "System Events" then
				(* It is disabled *)
				display dialog "Notifications will be turned on" buttons {"Got it"} default button 1
				key down option