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Teddy_Brewski
Apr 18, 2024Copper Contributor
Need help with Azure Load Balancer
Hello, I'd appreciate help with setting up Azure Load Balancer with one FreeBSD VM in the backend pool for authoritative DNS. I'm using dedicated VNET called VNET-PRIVATE-DMZ which is peered ...
juhua
Microsoft
Apr 22, 2024It appears that your setup is generally correct, but you're facing issues with traffic not reaching your FreeBSD VM via the Azure Load Balancer (NLB) on port 53/TCP.
Double-check the NSG rules associated with your FreeBSD VM's network interface and the subnet it resides in.
On the FreeBSD VM, ensure that IP forwarding is enabled
Verify that the firewall on your FreeBSD VM (if any, such as ipfw or pf) is configured to allow inbound and outbound traffic on port 53/TCP. Even if Azure's NSG rules are correctly set, the VM's local firewall could still block the traffic?
Double-check the NSG rules associated with your FreeBSD VM's network interface and the subnet it resides in.
On the FreeBSD VM, ensure that IP forwarding is enabled
Verify that the firewall on your FreeBSD VM (if any, such as ipfw or pf) is configured to allow inbound and outbound traffic on port 53/TCP. Even if Azure's NSG rules are correctly set, the VM's local firewall could still block the traffic?