my squid configuration on http proxy

#### OS ####
ubuntu 16.04

#### install ####
sudo apt-get install -y squid
sudo apt-get install -y apache2-utils

#### generate passwords file #####
sudo htpasswd -c /etc/squid/passwords $username

#### reload squid config
service squid reload

#### my squid.conf #####


acl SSL_ports port 443
acl Safe_ports port 80          # http
acl Safe_ports port 21          # ftp
acl Safe_ports port 443         # https
acl Safe_ports port 70          # gopher
acl Safe_ports port 210         # wais
acl Safe_ports port 1025-65535  # unregistered ports
acl Safe_ports port 280         # http-mgmt
acl Safe_ports port 488         # gss-http
acl Safe_ports port 591         # filemaker
acl Safe_ports port 777         # multiling http
acl CONNECT method CONNECT

http_access deny !Safe_ports
http_access deny CONNECT !SSL_ports


# Squid normally listens to port 3128
http_port 3128

# Leave coredumps in the first cache dir
coredump_dir /var/spool/squid

refresh_pattern ^ftp:           1440    20%     10080
refresh_pattern ^gopher:        1440    0%      1440
refresh_pattern -i (/cgi-bin/|\?) 0     0%      0
refresh_pattern (Release|Packages(.gz)*)$      0       20%     2880
# example lin deb packages
#refresh_pattern (\.deb|\.udeb)$   129600 100% 129600
refresh_pattern .               0       20%     4320

auth_param basic program /usr/lib/squid/basic_ncsa_auth /etc/squid/passwords
auth_param basic children 5
auth_param basic realm proxy
acl authenticated proxy_auth REQUIRED
http_access deny !authenticated
http_access allow authenticated
http_access deny all