Welcome to NoIpUpdater

I got a few Raspberry Pi's running services i want to portforward to access them from outside my home network. For this i use the free dynamic DNS service of noip.com. This worked fine for me from the beginning but as some time passed my router got assigned a new public IP from my ISP, which rendered the usage of my DDNS useless. I frequently had to contact someone at home to tell me the freshly assigned IP so i could change it in the WebUI of noip.com . Of course this is a tiresome process, especially if the router gets a new IP every single day. At some point i found out about the Update API of noip.com and decided to write a little service to periodically tell noip.com that my router's IP has been changed.

This is supposed to run on a Raspberry Pi, but other devices that are capable of running Python should be able to use it, too.

Installation

clone this repository using

git clone https://github.com/PyroFourTwenty/NoIpUpdater.git

execute service creator

sudo python3 NoIpUpdater/src/setup_systemd_service.py

reboot using

sudo reboot

or start service manually using

sudo systemctl start noipupdater.service

Files in this repo

SimpleUpdater.py

This script uses an external API (api.ipify.org) to determine the public IP and compare it to the last locally saved IP (initially the IP is empty). If the public IP has been changed, an update will be sent to noip.com (only regarding your configured hostname).

config.py

Possibly there are better ways to save a configuration file, but i wanted to keep it stupid simple. Keep this file a SECRET as it will contain your PASSWORD and USERNAME!!!!

The config file contains the following fields:

	default	comment
update_interval_in_seconds	60	Your hostname will be unreachable for this amout of seconds at most, so keep this number small but not too small, to not overflood your network with useless requests. Normally the hostname does not change this frequently
username	[email protected]	Enter your noip.com-username here
password	y0urPässw0r7	Enter your noip.com-password here
hostname	example.ddns.net	This will be your noip.com-hostname, which will be updated
update_url	http://{}:{}@dynupdate.no-ip.com/nic/update?hostname={}&myip={}	Don't change this unless the syntax of noip's Update API syntax changes and i am too lazy to update this repo

setup_systemd_service.py

This little script will setup a Systemd service (filename will be noipupdater.service) for you in the following form:

[Unit]
Description=No-IP updater
After=network.target
[Service]
User=pi
WorkingDirectory= THIS WILL BE DETERMINED AUTOMATICALLY
ExecStart=python3 src/SimpleUpdater.py
Restart=always
[Install]
WantedBy=multi-user.targetBlockquote

To make sure that you have the rights to create and enable this service run this as sudo:

sudo python3 setup_systemd_service.py

To check if the script worked correctly, enter the following command

nano /etc/systemd/system/noipupdater.service

and check the content of noipupdater.service.

After this you can reboot your pi using

sudo reboot

After rebooting, check the service's status using

sudo systemctl status noipupdater.service

Used libraries

• requests
  • install using pip install requests
• pathlib
  • install using pip install pathlib

Used API's / services

• ipify.org to get the public IP
• No-IP update api to tell our DDNS our new public IP in case it changed

Used tool for the creation of this readme

• stackedit.io