To draw a network diagram showing two servers located in Orlando and Dallas with a firewall layer, open ports, global payments, outgoing links to a billing system, and other third party API, you can follow these steps:
Draw the two servers located in Orlando and Dallas, with the firewall layer between the servers and the outside world.
Indicate the open ports on the firewall, such as HTTPS (port 443), SSH (port 22), etc.
Connect the servers to the firewall using lines to represent the network connections.
Show the global payments and outgoing links to the billing system as separate boxes or shapes connected to the servers.
Represent the third party API as a separate box or shape connected to the servers or firewall.
Label the different elements of the network diagram, such as the servers, firewall, open ports, global payments, billing system, and third party API.
Add notes or annotations to provide additional information or clarification.
You can use tools such as Visio, Omnigraffle, or Lucidchart to create a professional-looking network diagram.