diff --git a/www/squid/src/opnsense/service/templates/OPNsense/Proxy/squid.acl.conf b/www/squid/src/opnsense/service/templates/OPNsense/Proxy/squid.acl.conf
index b9e1f8787..16a07929d 100644
--- a/www/squid/src/opnsense/service/templates/OPNsense/Proxy/squid.acl.conf
+++ b/www/squid/src/opnsense/service/templates/OPNsense/Proxy/squid.acl.conf
@@ -28,6 +28,10 @@ adaptation_access request_mod allow whiteList
 http_access allow whiteList
 {% endif %}
 
+{%   if not helpers.empty('OPNsense.proxy.forward.authentication.method') %}
+http_access deny !local_auth
+{% endif %}
+
 {% if helpers.exists('OPNsense.proxy.forward.acl.blackList') %}
 
 #