htpasswd /etc/squid3/passwd toto
auth_param basic program /usr/lib/squid3/ncsa_auth /etc/squid3/passwd 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 ncsa_users proxy_auth REQUIRED http_access allow ncsa_users
http_port 3333
/etc/init.d/squid restart