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06-24-2020 10:27 PM
Hello all,
I have set up a PAN cluster in an Azure environment and also extended the Active Directory domain controllers in Azure (configure site links and AD AD replication with Virtual Machines in Azure), I have Azure ExpressRoute in middle and all traffic from on-prem is routed via the PAN cluster.
Now the issue I'm experiencing is that, on-prem workstation (even via VPN/VDI connectivity) are trying to the connect the Active Directory domain controllers in Azure,however, if the traffic routing from on-prem to Azure via the PAN is disable this issue doesn't occur...please what could be the problem
07-16-2020 02:44 PM
Based on the information provided, it is most likely an asymmetric route.
By default, Azure propagates the VNET routes to the ExpressRoute gateway. These routes do not use the VM-Series as the next hop.
If intent is to send traffic from ExpressRoute to the VM-Series, then the GatewaySubnet must have a User Defined Route that points to the firewall. Likewise, the AD server subnet's in Azure must also have a UDR that points to VM-Series. You can disable route propagation between the GatewaySubnet and AD subnet by disabling BGP route propagation within their Azure route tables.
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