Hello Now ldap helper is working :o))) Squid.conf is: auth_param basic program /usr/lib/squid/squid_ldap_auth -R -b OU=Users,OU=aaaa,OU=bbbb,OU=cccc,dc=xx,dc=yy,dc=www,dc=net" -f sAMAccountName=%s -h 10.239.56.2 auth_param basic children 5 auth_param basic realm Squid proxy-caching web server auth_param basic credentialsttl 2 hours auth_param basic casesensitive off .... acl password proxy_auth REQUIRED acl all src 0.0.0.0/0.0.0.0 http_access allow password http_access deny all cache_peer anotherproxy.xxxx.net parent 8080 0 proxy-only default but in access.log (see below) the error is the same :o(( 1139860418.565 0 10.239.57.19 TCP_DENIED/407 1784 GET http://www.microsoft.com/isapi/redir.dll? - NONE/- text/html -----Messaggio originale----- Da: Esteban [mailto:mertiolate@xxxxxxxxx] Inviato: lunedì 13 febbraio 2006 18.29 A: Franco, Battista Cc: Squid-Users@Squid-Cache. Org Oggetto: RE: Squid - LDAP > I tried to test the helper but no message appear (Error/OK) > Where do i find the helper file configuration? Soo the problem seems to be the Helper/autenticator. The helper don´t have a configuration file. You should have to use the comand line paramters only. Make shure you can actualy conect and Browse the Ldap Tree, Before use it whit the helpers. Maye the problem is in the Ldapserver. You colud use this http://www.softerra.com/products/ldapbrowser.php