Howzit ... You have : acl foo proxy_auth REQUIRED http_access allow foo Should it not be : acl prueba proxy_auth REQUIRED http_access allow prueba Anycase ... DO you have : auth_param basic program /usr/local/squid/libexec/ncsa_auth /usr/local/squid/etc/passwd auth_param basic children 5 auth_param basic realm YOUR COMPANY NAME auth_param basic credentialsttl 2 hours acl yournetworkname src 192.168.0.0/255.255.255.0 http_access allow yournetworkname AuthorizedUsers http_access deny all -----Original Message----- From: Begoña F [mailto:blackhandes@xxxxxxxxx] Sent: 26 July 2005 09:06 AM To: squid-users@xxxxxxxxxxxxxxx Subject: Authentication Hello, I have problems with the authentication. I've followed the faq's rules: 1.Acl: acl foo proxy_auth REQUIRED http_access allow foo 2. External authenticator program. % cd helpers/basic_auth/NCSA % make % make install 3. Password file 4. Configure the external authenticator in squid.conf. For ncsa_auth you need to give the pathname to the executable and the password file as an argument. For example: auth_param basic program /usr/local/squid/libexec/ncsa_auth /usr/local/squid/etc/passwd But I'm not able to start Squid: /var/messages: Bungled squid.conf line 444: acl prueba proxy_auth REQUIRED Thanks!