Unbound DNS Errors "Protocol Not Available"

[roblangston]

Important notices

Before you add a new report, we ask you kindly to acknowledge the following:

• I have read the contributing guide lines at https://github.com/opnsense/core/blob/master/CONTRIBUTING.md
• I am convinced that my issue is new after having checked both open and closed issues at https://github.com/opnsense/core/issues?q=is%3Aissue

Describe the bug

I have a standard OPNSense install and since version 24.7, I receive hundreds of errors in the Unbound logs when unbound is enabled (see below). This happens in version 24.7, 24.10 and now 25.1.2. Due to this, I have used Dnsmasq instead but now require some features in Unbound.

2024-11-29T19:53:44 Error unbound [49173:2] error: recvfrom 45 failed: Protocol not available 2024-11-29T19:53:44 Error unbound [49173:2] error: recvfrom 46 failed: Protocol not available 2024-11-29T19:53:44 Error unbound [49173:2] error: recvfrom 45 failed: Protocol not available 2024-11-29T19:53:44 Error unbound [49173:2] error: recvfrom 46 failed: Protocol not available 2024-11-29T19:53:44 Error unbound [49173:2] error: recvfrom 45 failed: Protocol not available 2024-11-29T19:53:44 Error unbound [49173:2] error: recvfrom 46 failed: Protocol not available 2024-11-29T19:53:38 Error unbound [49173:0] error: recvfrom 35 failed: Protocol not available

To Reproduce

• Log in to OPNSense
• Enable Unbound Service
• Under general settings enable "Register ISC DHCP4 Leases"
• Under general settings enable "Register DHCP Static Mappings"
• Wait 10-15 seconds and check the log file to see errors generated.

Expected behavior

Errors not to be generated in the log file.

Describe alternatives you considered

Switching to Dnsmasq. Updating OPNSense version (both revision and major versions).

Screenshots

Relevant log files

See attached unbound log file

resolver.log

Additional context

I opened a forum thread in November 2024 on the OPNSense forum which can be found here:-
https://forum.opnsense.org/index.php?topic=44353.0

Environment

OPNsense 25.1.2-amd64
FreeBSD 14.2-RELEASE-p2
OpenSSL 3.0.16

Hardware

Mini-PC with 4 x intel i226-V 2.5G NICs
Alder N100 CPU,

[OPNsense-bot]

Thank you for creating an issue.
Since the ticket doesn't seem to be using one of our templates, we're marking this issue as low priority until further notice.

For more information about the policies for this repository,
please read https://github.com/opnsense/core/blob/master/CONTRIBUTING.md for further details.

The easiest option to gain traction is to close this ticket and open a new one using one of our templates.

[roblangston]

I am not sure what the above means, the issue was created from the template.