Register mDNS records to AWS Route53

In local network, I can use mDNS names like DESKTOP-RHM4944.local, but I cannot use mDNS name over OpenVPN. I uses openvpn to access office network, and I want to be able to find out client IP of certain PC. and the PC uses DHCP to obtain dynamic IP.

I have AWS environment, so I can use Route32 to resolve local hostname.

The network

• AWS VPC
• EC2 with OpenVPN Server
• RaspberryPi on Office network (connected to OpenVPN Server)
• Client Laptop (as Remote Worker)

AWS Route53 Private Zone

• Create Route53 Private Zone to be used as .local alternative. I will connect DESKTOP-RHM4944.office instead of DESKTOP-RHM4944.local

Setup Site-to-site VPN using AWS EC2 OpenVPN server and OpenVPN Client on RPi

(I will not describe here, I have done it before)

GnuPG 사용하기

Create a new key

gpg --full-generate-key

export

내보내기

Wifi QR Code

• Code Format
  text

  WIFI:S:<SSID>;T:<WEP|WPA|blank>;P:<PASSWORD>;H:<true|false|blank>;;

• example
  text

  WIFI:S:DGKIM5G;T:WPA2;P:secretWiFi@@;;

Reference

• https://en.wikipedia.org/wiki/QR_code

Script

• docker_aws_vpc.sh
  bash

  #!/bin/bash
  
  # to prevent docker to pickup 172.31.0.0/16
  docker network \
  create \
  --subnet 172.31.253.0/30 \
  aws_vpc

Description

While you are developing, it is convenient if you are using VPN to access AWS VPC.

What if my tweets can be heard

Install rainbowstream

rainbowstream is a twitter client for linux cli.

• prepare python venv

python3 -m venv venv
source venv/bin/activate

• install rainbowstream

pip install rainbowstream

• run rainbowstream

rainbowstream
# you will be asked to login to twitter

Install espeak

espeak is TTS software for linux

Here is how I prepare python projects.

Assuming Python3 is already installed

I uses python3 installed by default via OS package. or brew python3 (But if I have a chance to use conda and the others, I may try)

Create python3 virtual environment

I uses venv module

• Create venv
  bash

  python3 -m venv venv

• Activate venv
  bash

  source venv/bin/activate

• Here you have Isolated environment you can experiment, not affecting entire OS.

Install pip and pip-tools

• Upgrade pip to latest version
  bash

  pip install --upgrade pip

• Install pip-tools for dependencies management
  bash

  pip install pip-tools

• for more information about pip-tools see https://pypi.org/project/pip-tools/

Installing libraries

• Create requirements.in file.
  text

  django>=2.2,<3.0

• Run pip-compile
  text

  pip-compile

• You can check cat requirements.txt
  text

  #
  # This file is autogenerated by pip-compile with python 3.10
  # To update, run:
  #
  #    pip-compile
  #
  django==2.2.28
      # via -r requirements.in
  pytz==2022.1
      # via django
  sqlparse==0.4.2
      # via django

• Install libraries using pip install
  bash

  pip install -r requirements.txt

• You can check installed libraries by pip list
  text

  Package    Version
  ---------- -------
  build      0.8.0
  click      8.1.3
  Django     2.2.28
  packaging  21.3
  pep517     0.13.0
  pip        22.2.2
  pip-tools  6.8.0
  pyparsing  3.0.9
  pytz       2022.1
  setuptools 59.6.0
  sqlparse   0.4.2
  tomli      2.0.1
  wheel      0.37.1