Symptoms
The following warnings appear repeatedly in /usr/local/cpanel/logs/error_log when accessing cPanel & WHM via a proxy subdomain (e.g., cpanel.example.com or webmail.example.com). The warnings occur in pairs on every login or page load:
CONFIG_TEXT: [2026-09-01 16:53:41 +0000] warn [cpaneld] proxy trust miss: X-Forwarded-For ignored; localhost peer [127.0.0.1:49234:127.0.0.1:2082] is not a verified trusted proxy (peer UID untrusted, or peer process lookup failed)
[2026-09-01 16:53:41 +0000] warn [cpaneld] proxy trust miss: replacing loopback HTTP_HOST with example.com
The warnings may appear under [cpaneld], [webmaild], or [whostmgrd] contexts. Access logs record 127.0.0.1 as the client IP instead of the visitor's real IP address.
Cause
cPanel & WHM's proxy trust verification attempts to identify the process behind each loopback connection mid-request. Under normal browser load, these connections can close before the identification completes, causing the check to fail and the real client IP to be dropped.
We've opened an internal case for our development team to investigate this further. For reference, the case number is CPANEL-56472. Follow this article to receive an email notification when a solution is published in the product.
Resolution
There is no resolution at this time. However, you can work around the issue by accessing the services directly via their respective ports. Replace domain.tld with your domain.
cPanel: https://domain.tld:2083
WHM: https://domain.tld:2087
Webmail https://domain.tld:2096
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