warn [cphttpd] proxy trust miss: replacing loopback HTTP_HOST with 'dns_only_hostname'

Hello,

We're seeing some unusual errors following the latest updates to our DNS Only nameserver

During UPCP the following files were updated:

[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages] Upgraded:
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages]   bind-32:9.16.23-40.el9_8.2.x86_64
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages]   bind-devel-32:9.16.23-40.el9_8.2.x86_64
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages]   bind-dnssec-doc-32:9.16.23-40.el9_8.2.noarch
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages]   bind-dnssec-utils-32:9.16.23-40.el9_8.2.x86_64
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages]   bind-libs-32:9.16.23-40.el9_8.2.x86_64
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages]   bind-license-32:9.16.23-40.el9_8.2.noarch
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages]   bind-utils-32:9.16.23-40.el9_8.2.x86_64
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages]   kernel-headers-5.14.0-687.15.1.el9_8.x86_64
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages]   kernel-tools-5.14.0-687.15.1.el9_8.x86_64
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages]   kernel-tools-libs-5.14.0-687.15.1.el9_8.x86_64
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages]   libldb-4.23.5-10.el9_8.x86_64
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages]   libwbclient-4.23.5-10.el9_8.x86_64
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages]   poppler-21.01.0-24.el9_8.1.x86_64
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages]   poppler-glib-21.01.0-24.el9_8.1.x86_64
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages]   python3-bind-32:9.16.23-40.el9_8.2.noarch
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages]   python3-perf-5.14.0-687.15.1.el9_8.x86_64
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages]   samba-client-libs-4.23.5-10.el9_8.x86_64
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages]   samba-common-4.23.5-10.el9_8.noarch
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages]   samba-common-libs-4.23.5-10.el9_8.x86_64
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages]   sos-4.11.0-1.el9_8.noarch
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages]
[2026-06-13 00:43:49 +1000]      [/usr/local/cpanel/scripts/update-packages] Complete!
[2026-06-13 00:43:49 +1000]    - Finished command `/usr/local/cpanel/scripts/update-packages` in 10.086 seconds

In the hourly logs since that update, every 5 minutes the following line is repeated in the cpanel error_log

/usr/local/cpanel/logs/error_log:
[2026-06-13 01:03:52 +1000] warn [cphttpd] proxy trust miss: replacing loopback HTTP_HOST with ns2.our_nameserver.com.au

Edit: There's also one instance on our main server too but much earlier in the day and it hasn't surfaced in any of the subsequent hourly issued logs sent to us by LFD, the DNS only server is the only repeat offender.

Thanks