日本国内だけのHPやサービスにアクセスする時は普通はVPNを使ったほうがいいんだけど、それが使えないケースもある(私の場合はappetize.io)
できるだけ安全に運用するための手順です
イメージ
世界→Myサーバー（squid）→国内専用HP
Basic認証でなおかつホワイトリスト方式（許可したドメインだけのアクセス許可）にします
インストール：
yum -y install squid
firewall-cmd –zone=public –add-port=3128/tcp –permanent
systemctl start squid.service
systemctl enable squid.service
yum install httpd-tools
htpasswd -c /etc/squid/passwords user
password＃これはBasic認証のために
vi /etc/squid/squid.conf
/etc/squid/squid.confの中身
#
# Recommended minimum configuration:
#
# Example rule allowing access from your local networks.
# Adapt to list your (internal) IP networks from where browsing
# should be allowed
auth_param basic program /usr/lib64/squid/basic_ncsa_auth /etc/squid/passwords
auth_param basic realm proxy
auth_param basic children 10
acl authenticated proxy_auth REQUIRED
http_access deny !authenticated #このDeny!にしないと、DNSのホワイトリスト方式が取れない
acl localnet src 10.0.0.0/8 # RFC1918 possible internal network
acl localnet src 172.16.0.0/12 # RFC1918 possible internal network
acl localnet src 192.168.0.0/16 # RFC1918 possible internal network
acl localnet src fc00::/7 # RFC 4193 local private network range
acl localnet src fe80::/10 # RFC 4291 link-local (directly plugged) machines
acl mysite dstdomain www.yahoo.co.jp
acl mysite dstdomain www.google.co.jp
acl mysite dstdomain .google.com
acl mysite dstdomain fonts.googleapis.com
acl mysite dstdomain ajax.googleapis.com
acl mysite dstdomain cdn.jsdelivr.net
#acl mysite dstdomain .googleapis.com
#acl mysite dstdomain .jsdelivr.net
acl mysite dstdomain youtu.be
acl mysite dstdomain .youtube.com
acl mysite dstdomain appetize.io
acl mysite dstdomain .medicalfields.jp
acl mysite dstdomain 157.7.94.189
acl mysite dstdomain www.ugtop.com #To Check Ip
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
#
# Recommended minimum Access Permission configuration:
#
# Deny requests to certain unsafe ports
http_access deny !Safe_ports
# Deny CONNECT to other than secure SSL ports
http_access deny CONNECT !SSL_ports
# Only allow cachemgr access from localhost
http_access deny manager
# We strongly recommend the following be uncommented to protect innocent
# web applications running on the proxy server who think the only
# one who can access services on “localhost” is a local user
#http_access deny to_localhost
#
# INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS
#
# Example rule allowing access from your local networks.
# Adapt localnet in the ACL section to list your (internal) IP networks
# from where browsing should be allowed
#http_access allow localnet
#http_access allow localhost
http_access allow mysite
http_access deny !mysite
# And finally deny all other access to this proxy
http_access deny all
# Squid normally listens to port 3128
http_port 3128
# Uncomment and adjust the following to add a disk cache directory.
#cache_dir ufs /var/spool/squid 100 16 256
# Leave coredumps in the first cache dir
coredump_dir /var/spool/squid
#
# Add any of your own refresh_pattern entries above these.
#
refresh_pattern ^ftp: 1440 20% 10080
refresh_pattern ^gopher: 1440 0% 1440
refresh_pattern -i (/cgi-bin/|\?) 0 0% 0
refresh_pattern . 0 20% 4320
dns_v4_first on #こうしないとGoogleに入れなかった
dns_nameservers 8.8.8.8 208.67.222.222
