DNS-related issues - PAN-OS 11.1.6-h3

JoaoPGBotelho — Mon, 31 Mar 2025 10:45:05 GMT

Hi,

We’ve been facing some DNS-related issues on one of our Palo Alto firewalls running PAN-OS 11.1.6-h3. Specifically, we’re seeing this event:

PAN_ELOG_EVENT_DNS_CLOUD_TIMEOUT Description: DNS Security cloud query timeout Type: dns-security Severity: Medium

It looks like DNS queries through the DNS Security service are intermittently failing due to timeouts.

After some digging, we suspect it might be tied to PAN-257183, which was resolved in PAN-OS 11.1.6-h6 with the note: "Fixed an issue where the firewall dropped DNS traffic when using DNS Security."

Before we plan an upgrade, we’d love to know: Is anyone else on 11.1.6-h3 seeing similar behavior?

Has anyone upgraded to 11.1.6-h6 and confirmed this issue is resolved?

Appreciate any insights from the community

Re: DNS-related issues - PAN-OS 11.1.6-h3

mshekh — Fri, 04 Apr 2025 08:09:28 GMT

Hi @JoaoPGBotelho ,

Thanks for detailed info, recommend you to open the case with support team for further assistance on this as team will review the logs and confirm if the issue is matching with PAN-257183 and fixed on PAN-OS 11.1.6-h6

topic Re: DNS-related issues - PAN-OS 11.1.6-h3 in Next-Generation Firewall Discussions

DNS-related issues - PAN-OS 11.1.6-h3

Re: DNS-related issues - PAN-OS 11.1.6-h3