auth_param basic program /usr/lib/squid/ncsa_auth /etc/squid/passwd
auth_param basic children 5
auth_param basic realm Squid Proxy Server
auth_param basic credentialsttl 2 hours
auth_param basic casesensitive off

acl localhost src 127.0.0.1/255.255.255.255
acl to_localhost dst 127.0.0.0/8
acl AUTHUSERS proxy_auth REQUIRED

http_access allow AUTHUSERS
http_access deny to_localhost
http_access allow localhost
#http_access deny all
http_reply_access allow all