Simplify Azure NSG Rules With Augmented Rules and Service Tags
Historically Azure Network Security Groups (NSG’s) have only allowed you to enter a single value for things things like source or destination IP and source or destination port. This has meant that for complex setups you end up with a very large amount of NSG’s. This is especially if you are trying to filter a large amount of IP’s, for example the Azure Data Center IP ranges, which is a common requirement if you want to restrict outbound access but allow access to PaaS resources.