实现与CentOS7，其他版本请自行变动。
环境搭建
具体搭建参考 使用Squid搭建CentOS7代理服务器上网 部分内容参考此文章
安装软件
终端执行命令
yum install squid -y
yum install httpd-tools -y生成密码文件
创建文件夹
mkdir /etc/squid3/
#ikaros 是用户名
htpasswd -cd /etc/squid3/passwords ikaros
#提示输入密码，比如输入123456
测试密码文件
/usr/lib64/squid/basic_ncsa_auth /etc/squid3/passwords
#输入用户名 密码
ikaros 123456
#提示ok说明成功
ok
#ctrl+c退出
配置squid.conf文件
vi /etc/squid/squid.conf
#在最后添加
auth_param basic program /usr/lib64/squid/basic_ncsa_auth /etc/squid3/passwords
auth_param basic realm proxy
acl authenticated proxy_auth REQUIRED
http_access allow authenticated修改下面这两处
# And finally deny all other access to this proxy
http_access allow all
#这里是端口号，可以按需修改
#http_port 3128 这样写会同时监听ipv6和ipv4的端口，推荐适应下面的配置方法。
http_port 0.0.0.0:3128将 http_access deny CONNECT !SSL_ports改为http_access allow CONNECT !SSL_ports 完整配置文件参考
#
# Recommended minimum configuration:
#
# Example rule allowing access from your local networks.
# Adapt to list your (internal) IP networks from where browsing
# should be allowed
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 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 allow CONNECT !SSL_ports
# Only allow cachemgr access from localhost
http_access allow localhost manager
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
# And finally deny all other access to this proxy
http_access allow 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
auth_param basic program /usr/lib64/squid/basic_ncsa_auth /etc/squid3/passwords
auth_param basic realm proxy
acl authenticated proxy_auth REQUIRED
http_access allow authenticated日志
squid的日志位于/var/log/squid/目录下。
启动，停止，重启等
#启动start
systemctl start squid.service
#停止stop
systemctl stop squid.service
#重启stop
systemctl restart squid.service
#配置开机自启动
systemctl enable squid.service
#关闭开机自启动
systemctl disable squid.service
#查看运行状态
systemctl status squid.service
Windows下客户端测试
根据以上步骤安装完后，Windows下安装Proxifier
点击文件下面的按钮，新建代理服务器
填完信息后我们检查一下
正常情况下是这样的
如果报错
可以采取解决方案：
1、是否开放了服务器端口，例如云服务器安全组开放出入站规则，加入3128端口
2、
这种情况需要修改配置文件 /etc/squid/squid.conf。
将 http_access deny CONNECT !SSL_ports改为http_access allow CONNECT !SSL_ports 3、开头文章教程里的这一块部分是否做了配置
4、这一部分是否也 allow
5、以上步骤结束后，重启squid
systemctl restart squid配置规则
关闭默认的 localhost 和 default
针对对应程序进行代理设置
我这里以QQ为例
配置好后，打开QQ，点击设置
填入信息，默认的3128端口
测试一下
就可以登录QQ了
回到 proxifier
可以看到QQ已经接入代理了。
