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I have a Virtual Network Gateway set up using OpenVPN with certificate-based authentication.

I am able to connect to the OpenVPN server on my Ubuntu 22.04 machine, and while connected I am able to reach private IP addresses that are part of the network.

DNS resolution is not working, however.

If I try to ping a certain <dbname>.postgres.database.azure.com, it says "Name or service not known". Whereas if I pinged that hostname in one of the VMs that's part of the same Virtual Network, the private IP gets resolved.

How do I get DNS resolution to work?

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  • Voted to migrate to Super User, that's not a programming problem. But the short (and hopefully least effort) answer is: make OpenVPN hand out the internal DNS server with its DHCP lease.
    – tink
    Commented Mar 6 at 16:54

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