centos7配置squid代理服务器

1. 服务器列表：

   角色                内网ip                外网ip
   squid服务器   192.168.8.81     192.168.8.252
   web1服务器   192.168.8.83     -
   web2服务器   192.168.8.84     -

2. squid服务器配置：
   a. 内网配置：
   cat /etc/sysconfig/network-scripts/ifcfg-eth0
   
   b. 外网配置：
   cat /etc/sysconfig/network-scripts/ifcfg-eth1
   
   c. 安装：
   yum -y install squid
   d. 修改配置文件：
   vim /etc/squid/squid.conf
   
   e. 配置文件原代码：

   acl manager proto cache_object
   acl localnet src 127.0.0.1/32 ::1
   acl localnet src 192.168.8.0/24
   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
   http_access allow manager localhost
   http_access deny manager
   http_access deny !Safe_ports
   http_access deny CONNECT !SSL_ports
   http_access allow localnet
   http_access allow localhost
   http_access allow all
   visible_hostname lee.com
   cache_mem 2048 MB 
   maximum_object_size 4096 KB
   cache_dir ufs /var/spool/squid 800 16 256
   error_directory /usr/share/squid/errors/zh-cn
   cache_log /var/log/squid/cache_log
   cache_mgr [e-mail]
   http_port 80 accel vhost
   http_port 3128
   cache_peer 192.168.8.83 parent 80 0 no-query originserver round-robin name=server1
   cache_peer 192.168.8.84 parent 80 0 no-query originserver round-robin name=server2
   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

   f. 配置防火墙规则（开启3128端口）：
   iptables -I INPUT -p tcp --dport 3128 -j ACCEPT
   g. 关闭apache：
   systemctl stop httpd

3. web1服务器配置：
   a. 内网配置：
   cat /etc/sysconfig/network-scripts/ifcfg-eth0
   
   b. 关闭防火墙：
   systemctl stop firewalld
4. web2服务器配置（参照web1）：
5. 浏览器访问（192.168.8.252）：
   a. 页面一：
   
   b. 页面二：
   

本文转自 Lee_吉  博客，原文链接：    http://blog.51cto.com/12173069/2061841    如需转载请自行联系原作者