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Connecting to Azure SQL DB over VPN

Reitse Eskens has some routing issues:

To make sure the on-premises connection uses the VPN and the private endpoint, we need to make sure the on-premises DNS (it’s always DNS) recognizes the traffic and redirects it to the VPN connection. But whatever we tried on the firewall, the traffic kept going the wrong way. It did have something to do with the on-premises DNS setup in the end.

When we tried to connect to the Azure SQL instance on IP-address, it threw an error because the instance wasn’t found. You can only connect to it with the FQDN (dbname.database.windows.net)

Click through to see what the problem was and how Reitse solved it.

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