Dynamic DNS with DomainDiscount24 and pfsense

Sat, 27 May 2023 00:00:00 +0000

Many companies offer free dynamic DNS. But since I use DomainDiscount24, I also use their dynamic DNS service. To update the IP address of vpn.jeltsch.org, I need to send an https request to a specific URL, including a password and the hostname for which I want the update:https://dynamicdns.key-systems.net/update.php?hostname=vpn.jeltsch.org&password=12345678&ip=autoTo automate this, I use the crontab of my pfsense router. Editing the crontab is not enabled by default, but you can download and install the cron package. After that, you get a GUI under “Services > Cron”, where you add the timing and the command:/usr/local/bin/curl "https://dynamicdns.key-systems.net/update.php?hostname=vpn.jeltsch.org&password=12345678&ip=auto"

Editing the crontab

Thu, 24 May 2007 00:00:00 +0000

We have a shared directory (/home/shared) on our computer and a usergroup called “shared”. The purpose is that we put things there that should be accessible (including writable) to several users of the system. If one user puts a file there, it can be read by others but not e.g. deleted. In order to fix this, we edited the crontab to execute every 5 minutes the following two commands: chgrp -R shared /home/sharedchmod -R 744 /home/sharedIn order to do this we edited (as root of course) the /etc/crontab file by adding the line: */5 * * * * root run-parts /etc/cron.minutelyThis means execution every 5 minutes, every hour, every day, every month, every weekday the script run-parts should be executed as root taking all scripts from the /etc/cron.minutely as argument (we created this directory newly in addition to the already existing /etc/cron.hourly, etc.). We restarted crond (the crontab deamon) via the GUI (under RedHat 9 Menu-System Settings-Server Settings-Services).

Crontab on Michael’s Domain

Dynamic DNS with DomainDiscount24 and pfsense

Editing the crontab