Hello, I would like to disable login dialog box which pops up asking for username and password on firefox. I use squid 3.1.6 and see this webpage : http://wiki.squid-cache.org/Features/Authentication. It's say: To prevent incorrect login details being re-challenged after sign-on has failed all you have to do is prevent the login ACL being the last on the authentication line. For example, this normal configuration will cause a login re-challenge until working details are presented: http_access deny mustLogin This*all hack*will present a plain access denied page without challenging for different credentials: http_access deny mustLogin all I try this but it didn't work for me. This is my squid.conf: ##################### ###authentification ##################### auth_param ntlm program /usr/bin/ntlm_auth --helper-protocol=squid-2.5-ntlmssp auth_param ntlm children 10 auth_param ntlm keep_alive on acl membre_du_domaine proxy_auth REQUIRED #checkup firefox acl site_sans_authentification dstdomain .addons.mozilla.org acl site_sans_authentification dstdomain sb-ssl.google.com #maj spybot acl site_sans_authentification dstdomain www.safer-networking.org acl site_sans_authentification dstdomain .spybotupdates.com #maj windows acl site_sans_authentification dstdomain .SLS.Microsoft.com acl site_sans_authentification dstdomain go.microsoft.com acl site_sans_authentification dstdomain .windowsupdate.com acl site_sans_authentification dstdomain .update.microsoft.com acl site_sans_authentification dstdomain download.microsoft.com ##################### ###reseau ##################### acl localhost src 127.0.0.1/32 acl reseau_mairie src 172.16.0.0/16 ##################### ###requete ##################### acl script urlpath_regex cgi-bin \? \.cgi \.pl \.php3 \.asp \.php ##################### ###port ##################### acl port_ssl port 443 acl port_autorise port 80 # http acl port_autorise port 21 # ftp acl port_autorise port 443 # https acl port_autorise port 70 # gopher acl port_autorise port 210 # wais acl port_autorise port 1025-65535 # unregistered ports acl port_autorise port 280 # http-mgmt acl port_autorise port 488 # gss-http acl port_autorise port 591 # filemaker acl port_autorise port 777 # multiling http ##################### ###method ##################### acl manager proto cache_object acl CONNECT method CONNECT ###################### ###acces list ###################### http_access allow manager localhost http_access deny manager http_access deny !port_autorise http_access deny CONNECT !port_ssl http_access allow localhost http_access deny !reseau_mairie http_access allow site_sans_authentification http_access deny user_interdit all http_access deny !membre_du_domaine all http_access deny all icp_access allow all cache deny script ##################### ###log ##################### access_log /var/log/squid3/access.log squid ##################### ###config ##################### http_port 8080 icp_port 3130 error_directory /usr/share/squid3/errors/French hierarchy_stoplist cgi-bin ? cache_dir ufs /var/spool/squid3 1024 16 256 cache_mem 1024 MB refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern . 0 20% 4320 coredump_dir /var/spool/squid3 url_rewrite_program /usr/bin/squidGuard -c /etc/squid/squidGuard.conf url_rewrite_children 10 Thanks for your help Guillaume