Boris provided a great answer, which I believe should satisfy your questions. I was concurrently working a response earlier today but got pulled into some meetings, so I apologize for the delay in responding.
Azure Web Apps do not have a limit on the number of inbound concurrent connections for a single Azure public IP. However, there are some limits on the number of total connections that can be established across the entire VM, which can affect the number of inbound connections that can be established. These limits on the number of total connections that can be established across a web app. These limits are based on the size of the VM that is hosting the web app.For example, for a Basic tier VM, the limit is 240 total connections. For a Standard tier VM, the limit is 600 total connections. For a Premium tier VM, the limit is 3,500 total connections.It's important to note that these limits are for the entire VM, not just for a single web app. So if you have multiple web apps running on the same VM, the total number of connections across all of the web apps cannot exceed the limit for the VM.If you need to increase the connection limit for your web app, you can scale up to a larger VM size that has a higher connection limit. You can also scale out to multiple instances of your web app, which will distribute the connections across multiple VMs and increase the total connection limit.Regarding the monitoring of the number of active connections, Azure provides a metric called "Connections" that can be used to monitor the number of connections across the entire VM. This metric can be used to track how close the number of active connections is to the limit. You can view this metric in the Azure portal or programmatically using Azure Monitor.Please note that the "Connections" metric includes both inbound and outbound connections, so you will need to filter the metric to only show inbound connections. You can do this by using the "Direction" filter in the Azure portal or by using the "direction" parameter in the Azure Monitor API.
Let Boris or I know if you have further questions or concerns that we can assist you with.
