Introduction and squid proxy server configuration (theory + practice) two

ACL Access Control

ACL access control

• According to the source address, destination URL, file type and other custom list
  • acl 列表名称 列表类型 列表内容 ...
• Acl restrictions for list of defined
  • http_access allow或deny 列表名称 ...

ACL Rule Priority

• When a user accesses a proxy server, Squid will order a list of all matching rules defined in Squid, once the match is successful, stop the match immediately. When all rules match, Squid will use a rule contrary to the last

Common types of ACL list

• src → source address
• dst → destination address
• port → destination address
• dstdomain → target domain
• time → access time
• The maximum concurrent connections maxconn →
• url_regex → target URL address
• Urlpath_regex → entire target URL path

Experimental set up

lab environment

squid服务器IP地址：ens33:192.168.80.184
                  ens36:192.168.10.1 （仅主机模式）
web服务器IP地址：192.168.80.151
client客户端IP地址：192.168.10.10  （仅主机模式）

Modify the configuration file on the server squid

root@squid ~]# vim /etc/squid.conf      //修改配置文件
# should be allowed
acl hostlocal src 192.168.10.10/32        //控制hostlocal10.10的主机
# Deny requests to certain unsafe ports
http_access deny hostlocal                //拒绝访问
[root@squid ~]# service squid reload       //重启squid服务

Access to web pages on the test machine

sarg log configuration

Sarg installed on the server squid

[root@squid ~]# mount.cifs //192.168.80.2/LNMP-C7 /mnt/      //挂载
Password for root@//192.168.80.2/LNMP-C7:  
[root@squid ~]# cd /mnt/
[root@squid mnt]# tar zxvf sarg-2.3.7.tar.gz -C /opt/        //解压
[root@squid mnt]# cd /opt/sarg-2.3.7/
[root@squid sarg-2.3.7]# yum install gd gd-devel -y       //安装gd库
[root@squid sarg-2.3.7]# ./configure --prefix=/usr/local/sarg \     //安装路径
> --sysconfdir=/etc/sarg \        //指定配置文件位置
> --enable-extraprotection        //开启安全防护
[root@squid sarg-2.3.7]# make && make install       //编译安装

Sarg modify configuration files

[root@squid sarg-2.3.7]# vim /etc/sarg/sarg.conf      //修改sarg配置文件
access_log /usr/local/squid/var/logs/access.log    //开启指定访问日志文件
title "Squid User Access Reports"                  //网页标题
output_dir /var/www/html/squid-reports             //报告输出目录
user_ip no                                        //使用用户名显示
exclude_hosts /usr/local/sarg/noreport            //不计入排序的站点列表文件
topuser_sort_field connect reverse               //top排序中有连接次数，访问字节，降序排列，升序是normal
overwrite_report no                        //同名日志是否覆盖
mail_utility mailq.postfix                //发送邮件报告命令
charset UTF-8                             //使用字符集
weekdays 0-6                              //top排行的时间周期
hours 0-23                               //top排行的时间周期
www_document_root /var/www/html           //网页根目录
[root@squid ~]# sarg                       //生成报告
SARG: 纪录在文件: 91, reading: 100.00%
SARG: 成功的生成报告在 /var/www/html/squid-reports/2019Dec11-2019Dec12
[root@squid sarg-2.3.7]# cd /var/www/html/squid-reports/        //切换到html目录下
[root@squid squid-reports]# ls
2019Dec11-2019Dec12   images  index.html
[root@squid squid-reports]# yum install httpd -y               //安装httpd服务
[root@squid squid-reports]# systemctl start httpd.service     //开启服务
[root@squid squid-reports]# systemctl stop firewalld.service      //关闭防火墙
[root@squid squid-reports]# setenforce 0                       //关闭selinux

View Record in client access clients to access web pages

Configuration Periodically scheduled tasks on squid server to collect access information every day

sarg -l /usr/local/squid/var/logs/access.log -o /var/www/html/squid-reports/ -z -d $(date -d "1 day ago" +%d/%m/%Y)-$(date +%d/%m/%Y)

Check again recorded in the client access clients to access web pages

squid reverse proxy configuration

lab environment

squid服务器IP地址：ens33:192.168.80.184
                  ens36:192.168.10.1 （仅主机模式）
web1服务器IP地址：192.168.80.151
web2服务器IP地址： 192.168.80.185
client客户端IP地址：192.168.10.10  （仅主机模式）

Edit content on the web server web1

root@web ~]# cd /var/www/html/
[root@web html]# echo "<h1>this is test web!</h1>" > index.html

The client web client access

Edit content on the web server web2

[root@web2 ~]# systemctl stop firewalld.service       //关闭防火墙
[root@web2 ~]# setenforce 0
[root@web2 ~]# yum install httpd -y                  //安装httpd服务
[root@web2 ~]# cd /var/www/html/                     //创建网页内容
[root@web2 html]# echo "<h1>this is test2 web!</h1>" > index.html 
[root@web2 html]# systemctl start httpd.service 

Configure a reverse proxy server on squid

[root@localhost squid]# vim /etc/squid.conf
# Squid normally listens to port 3128
http_port 192.168.80.184:80 accel vhost vport        //监控本机80端口
cache_peer 192.168.80.151 parent 80 0 no-query originserver round-robin max_conn=30 weight=1 name=web1        //节点服务器1最大访问30，权重1，别名web1
cache_peer 192.168.80.185 parent 80 0 no-query originserver round-robin max_conn=30 weight=1 name=web1
cache_peer_domain web1 web2 www.yun.com     //访问yun.com匹配web1，web2节点
[root@localhost squid]# service squid restart      //重启squid服务

Configuring resolve the domain name address in the client user admin client, and set up a proxy