Azure Networking Traffic Simulator
You should consider adding a Azure Networking Traffic Simulator somewhere in Azure to provide better tooling for troubleshooting and configuring NSG firewall rules.
This seems redundant to some of the offerings within Azure Security Center. Why can't those APIs just be re-used and integrated into Network Watcher?
Mario Lopez [MSFT] commented
Thanks for the input. We are looking into a similar solution to be added as a tool feature for NSGs, good feedback