Forum Discussion
Azure VM Persistent Route Setup
Hi I hope to get some advice on a routing issue from Azure to an on-premises system. A little background first, please bear with me: We have an on-premises VM that connects to an isolated Thirdpar...
I would avoid solving this with persistent OS routes unless the next hop is directly reachable on the VM subnet.
In Azure, put the route on the subnet with a user-defined route:
1. Destination: the third-party/on-prem prefixes.
2. Next hop: Virtual network gateway if the VPN gateway owns that path.
3. Next hop: Virtual appliance if traffic must go through Azure Firewall or an NVA.
Also update the Local Network Gateway/on-prem ASA routes and VPN traffic selectors so the return path includes both the Azure VM subnet and the destination prefixes. Then validate from Azure with Effective Routes and Network Watcher Connection Troubleshoot.