As a server administrator you have the ability to set custom firewall rules on your Cloud Hosting. To add a new firewall rule first log into the cloud control panel. Click on the server you want to setup firewall rules for, then select Networking -> Firewall.

The default firewall rules are to allow all traffic:

You can lock down all traffic on the Port, by making the default command “Drop” all connections. You can then allow specific IP addresses to access ports and resources on the server, like Port 3389 for RDP. Using IP source address 0.0.0.0/0 will allow all IPs to a specific port like 443 as shown below: