squid proxy

# Install squid
plain old `apt-get update && apt-get install squid3 apache2-utils -y`

# Basic squid conf
`/etc/squid3/squid.conf` instead of the super bloated default config file

# note that on ubuntu 16.04, use squid instead of squid3
auth_param basic program /usr/lib/squid3/basic_ncsa_auth /etc/squid3/passwords
auth_param basic realm proxy
acl authenticated proxy_auth REQUIRED
http_access allow authenticated
forwarded_for delete

Please note the `basic_ncsa_auth` program instead of the old `ncsa_auth`

# Setting up a user
`sudo htpasswd -c /etc/squid3/passwords username_you_like`, *on 16.04, it’s squid, not squid3*
and enter a password twice for the chosen username then
`sudo service squid3 restart`

see: https://stackoverflow.com/questions/3297196/how-to-set-up-a-squid-proxy-with-basic-username-and-password-authentication

# centos
I have to use centos, since adsl providers are not capable of providing ubuntu

check out this wonderful article: https://hostpresto.com/community/tutorials/how-to-install-and-configure-squid-proxy-on-centos-7/

yum install -y epel-release
yum install -y squid
yum install -y httpd-tools

systemctl start squid
systemctl enable squid
touch /etc/squid/passwd && chown squid /etc/squid/passwd
htpasswd -c /etc/squid/passwd root

edit `/etc/squid/squid.conf`

auth_param basic program /usr/lib64/squid/basic_ncsa_auth /etc/squid/passwd
auth_param basic children 5
auth_param basic realm Squid Basic Authentication
auth_param basic credentialsttl 2 hours
acl auth_users proxy_auth REQUIRED
http_access allow auth_users
http_port 3128


squid 默认只允许代理 443 端口的https流量,而会拒绝对其他端口的connect请求。需要更改配置文件

To fix this, add your port to the line in the config file:
acl SSL_ports port 443
so it becomes
acl SSL_ports port 443 4444
squid 默认还禁止了除了443之外的所有connect
deny CONNECT !SSL_Ports # 删掉这一句



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