Introduction For most businesses using some kind of firewall in Azure is not optional , these firewalls could be a cloud native offering such as Azure Firewall or a Network Virtual Appliance (NVA) running on IaaS such as Palo Alto, Checkpoint, Fortigate etc etc. A popular and common networking model in Azure that utilises some form of firewall is the hub and spoke network design which uses a centralised firewall or maybe even multiple centralised firewalls behind a load balancer for high availability .