Hi! I found that returned to normal after cancel the transparent proxy Settings. such as change "http_port 3128 transparent" to "http_port 3128. So ,It didn't applicable for transparent proxy by squid 3.1.10. Is applicable transparent and squid_ldap_group auth in the squid latest version ???? -- View this message in context: http://squid-web-proxy-cache.1019090.n4.nabble.com/Acl-cc-26-AuthenticateAcl-authentication-not-applicable-on-intercepted-requests-tp4665989p4665996.html Sent from the Squid - Users mailing list archive at Nabble.com.