I have squid proxy and I'm using auth_param basic program is ncsa_auth so I want the user access sites like google.com and yahoo.com without ask them logon which is mean when users type google.com in browser the site will be opened immediately without user/password by the way others site the user will access it normally with user/password .Thank you advance.
You should add an acl for the permited addresses on top of your auth lines in squid.conf, i.e for google:
acl GOOGLE dstdomain google.com
http_access allow GOOGLE
That should do it. Remember to add this lines before any auth lines in squid.conf