This is a reminder on how to allow traffic from a windows machine to my Linux machine when that windows machine has a dynamic IP that changes once a day at least. I want to have this answer at hand when needed.
I got this solution from this stackexchange answer.
Here you have:
sudo iptables -A INPUT -p tcp --src MyComputer-a1H75wMROeh.companydomain.com -j ACCEPT
If you want to allow access from the same machine but using a specific port, like ssh:
sudo iptables -A INPUT -p tcp --src MyComputer-a1H75wMROeh.companydomain.com --dport 22 -j ACCEPT
And that’s all for now!