auth_param basic program /usr/lib/squid3/basic_ncsa_auth /etc/squid3/squid_passwd

acl blocked dstdomain google.com.vn

acl ncsa_users proxy_auth REQUIRED
acl restrictedusers proxy_auth /etc/squid3/restrictedusers

http_access deny restrictedusers blocked
http_access allow ncsa_users
http_access deny all

a2:$apr1$ovwnKYTS$87Z3TtWZOkAphB5BnfO8i0
a1:$apr1$ovwnKYTS$87Z3TtWZOkAphB5BnfO8i0

a2