Bash No-IP Updater using CronJob Script

Creating this post just to save what worked for my No-IP configuration with my office’s Router for VPN configuration with FQDN & dynamic public IP.

Source: https://github.com/mdmower/bash-no-ip-updater

A bash script to update the IP address of No-IP hostnames. Supports multiple hostname updates and log rotation (config_sample).

Prerequisites

• bash
• curl or wget
• GNU coreutils
• gzip (optional, for log rotation)

Installation & Configuration

Clone the script from Repository:

git clone https://github.com/mdmower/bash-no-ip-updater.git

Move to Bash-No-Ip-Updater Script directory:

cd bash-no-ip-updated

Rename the configuration file:

sudo cp config_sample config

Make required changes in configuration file and enter as per your settings:

sudo nano conifg

Enter following details in the configuration file:

• Username of No-IP
• Password of No-IP
• FQDM or HOST configured at No-IP

Save and exit. Now configuration is complete. We can test it now.

Usage

./noipupdater.sh [-c /path/to/config] [-i 123.123.123.123]

–c (optional): Path to config file (see config_sample). If this parameter is not specified, then the script will look for file config in the same directory as the script.
-i (optional): Manually set the IP address that should be assigned to the hostname(s). If this paremter is not specified, the IP address will be auto-detected by No-IP.

Automation

To automate this script, we need to add it to crontab with: crontable -e command.

Run script once each day at 5:30am:

30 5 * * * /path/to/noipupdater.sh

Run the script every fifteen minutes:

*/15 * * * * /path/to/noipupdater.sh

Note: This is a bash script, so you may need to specify

SHELL=/bin/bash

in crontab.

How to Enable & Check cron logs in Ubuntu

Modify rsyslog config:

open /etc/rsyslog.d/50-default.conf
remove # before cron.*

Restart rsyslog service:

sudo service rsyslog restart

Restart cron service:

service cron restart

NOW you can check cron log from file /var/log/cron.log

Another useful script, not tested yet:

Script to auto renew/confirm noip.com free hosts

https://github.com/loblab/noip-renew

Reference Link

noip.com free hosts expire every month. This script auto clicks web pages to renew the hosts, using Python/Selenium with Chrome headless mode.