1.安装
yum install squid
2.配置
安装完squid后，配置文件在/etc/squid下；
需要用户认证配置如下：
#
# 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 allcomputers src all
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 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
auth_param basic program /usr/lib64/squid/basic_ncsa_auth /etc/squid/passwd
auth_param basic children 5
auth_param basic credentialsttl 5 hours #认证有效时间
auth_param basic realm proxy #客户端在使用代理时，输入密码时弹出来的提示框中的描述文字
acl auth_user proxy_auth REQUIRED #定义认证的用户
http_access allow localnet
http_access allow localhost
http_access allow auth_user #允许认证的用户访问
# And finally deny all other access to this proxy
http_access deny all
# Squid normally listens to port 3128
http_port 3100
# 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
access_log /var/log/squid/access.log
#
# 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 .
3.安装认证工具
yum install http-tools
安装好后，创建用户‘proxy_username’，用法：htpasswd -c 路径 用户名 密码
htpasswd -c /etc/squid/passwd proxy_username
点击enter后输入密码，再次确认密码，完成如此操作后，生成passwd文件；
配置中：auth_param basic program /usr/lib64/squid/basic_ncsa_auth /etc/squid/passwd就是指的验证方式；
4.启动squid
#验证语法
squid -k parse
#初始化
squid -z
#启动
squid -s
5.查看端口
netstat -ntlp | grep squid