I have several sites set up on an Azure VM in IIS, each with different ports. I need to link these to specific domain names on my DNS. I'm aware that you can't specify ports in DNS settings, so my best understanding is that I need to create Public IP Addresses in Azure and then link these to IP Configurations on the Network Interface.
I've been using the following tutorial: https://docs.microsoft.com/en-us/azure/virtual-network/virtual-network-multiple-ip-addresses-portal
However, I see no mention of ports in the tutorial. How can I achieve what I'm trying to do, or have I misunderstood how you host multiple websites on IIS?