Forum Discussion
routing table
Hello, I have a virtual network with 192.168.0.0/24. In the virtual network is a firewall with 192.168.0.5. Now I want to route any outgoing traffic on the virtual network through the firewall. If...
Hi Stefan,
That’s a common situation in Azure networking.
When you add a route 0.0.0.0/0 → 192.168.0.5, all traffic including intra-subnet is sent to the firewall, which breaks internal communication.
The correct approach is to:
- Keep system routes for your VNet and subnets, for example 192.168.0.0/24
- Apply the UDR with 0.0.0.0/0 → 192.168.0.5 only to the application subnets, not to the firewall subnet
- Ensure the firewall performs SNAT or has return routes to internal networks
https://learn.microsoft.com/en-us/azure/virtual-network/virtual-networks-udr-overview https://pingmynetwork.com/academy/ccna-200-301/routing-table/