Description:
All SSH ports on any machine within Azure should have either CU subnets as a filter or the individual hosts IP as a /32 CIDR block. Under no reason should anyone on the internet should be able to view an OpenSSH port without using VPN or use your individual static IP address.
Solution/Reference:
Learn more about SSH in Azure here:
https://docs.microsoft.com/en-us/azure/virtual-machines/linux/ssh-from-windows