06-17-2025 02:41 PM
In the Palo Alto firewall, we are unable to reach the DNS servers. These servers are in the cloud and act as proxy servers as well as domain controllers.
From our VMs, we are able to ping the DNS IPs successfully, but in the firewall session logs, it shows "resource unavailable."
Note that the same configuration is working on another Palo Alto firewall, where it is able to reach the DNS servers from the assets without any issue.
06-19-2025 07:53 PM
Try to create an application override for this traffic, that should work! 🙂
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