An Azure service that enables network appliances to exchange route information with Azure virtual networks dynamically.
Hi xeb7152,
Thank you for reaching out on Microsoft Q&A forum
You are seeing your default routes to Hong-kong location because of
Service Endpoints: Having active Service Endpoints for services like Azure Storage or SQL Database in your subnet, Azure directs specific routes into your Virtual Network. Allowed routes traffic is bypassing your User Defined Routes to reach Microsoft services directly via backbone network.
Geo-IP Resolution: The geo location might be showing Hong-kong but traffic is routed to the nearest Azure region Canada Central, which is set by you, there is a mechanism that result as above, which supports by azure services called anycast.
If you wish all traffic to go through your firewall, then you can follow as below:
Remove Service Endpoints from the subnet:
Go to VNet → Subnet → Service Endpoints and disable them.
This will remove the /32 routes.
Use Private Endpoints otherwise,as recommended approach for secure and controlled routing.
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Kindly let us know if you have any additional questions.
Thanks