squid安装与配置
Squid 安装 与 配置 [root@localhost ~]# yum -y install squid [root@localhost ~]# rpm -ql squid (释放文件) /etc/squid/squid.conf /etc/squid/msntauth.conf.default ( 配置 文件模板) /var/log/squid (日志目录) /var/spool/squid (缓存目录)
Squid安装与配置
[root@localhost ~]# yum -y install squid
[root@localhost ~]# rpm -ql squid(释放文件)
/etc/squid/squid.conf
/etc/squid/msntauth.conf.default(配置文件模板)
/var/log/squid(日志目录)
/var/spool/squid(缓存目录)
[root@localhost ~]# vim /etc/squid/squid.conf(常用基本配置)
http_port 3128
cache_mem 64 MB 内存占用量
maximum_object_size 4096 KB(最大缓存)
access_log /var/log/squid/access.log squid
visible_hostname proxy.openlab.com(代理服务器主机名)
dns_testnames www.google.com www.163.com(测试DNS)
cache_dir ufs /var/spool/squid 100 16 256(100M,)
1.squid 服务器实现基本代理
squid服务器
eth0 200.200.200.10
eth1 192.168.10.8
WEB服务器
eth0 200.200.200.100
[root@www ~]# iptables -P INPUT DROP (-P默认规则)
[root@localhost ~]# iptables -I INPUT -p tcp --dport 22 -j ACCEPT
[root@localhost ~]# iptables -I INPUT -p tcp --dport 80 -j ACCEPT
squid服务器
[root@localhost ~]# service squid restart(启动服务,无需配置)
Stopping squid: .............. [ OK ]
Starting squid: . [ OK ]
[root@localhost ~]# vim /etc/squid/squid.conf
cache_dir ufs /var/spool/squid 100 16 256(去掉前面#)
reply_body_max_size 10 MB(不允许下载大于10M附件,此行需添加)
acl RealFile urlpath_regex -i \.mp3$(添加一条acl)
(http_access deny all)
2.透明代理
Squid服务器
Eth0 200.200.200.10 eth1 192.168.10.8
[root@localhost ~]# vim /etc/squid/squid.conf
http_port 192.168.10.8:3128 transparent
[root@localhost ~]#iptables -t nat -I PREROUTING -i eth1 -s 192.168.10.0/24 -p tcp --dport 80 -j REDIRECT --to-ports 3128
[root@localhost ~]# service iptables save
开启路由转发
[root@localhost ~]# vim /etc/sysctl.conf
net.ipv4.ip_forward = 0
[root@localhost ~]# sysctl -p
配置nat
[root@localhost ~]# iptables -t nat -I POSTROUTING -s 192.168.10.0/24 -o eth1 -j SNAT --to-source 200.200.200.10
WEB服务器
Eth0 200.200.200.100
[root@localhost ~]# iptables -L --line-numbers
Chain INPUT (policy DROP)
num target prot opt source destination
1 ACCEPT tcp -- anywhere anywhere tcp dpt:http
2 ACCEPT tcp -- anywhere anywhere tcp dpt:ssh
测试
3.Squid反向代理
[root@localhost ~]# vim /etc/squid/squid.conf
http_port 218.29.30.31:80 vhost (vhost虚拟主机,80因为http默认是80,所以代理端口写成80)
cache_peer 192.168.2.11 parent 80 0 originserver weight=5 max-conn=30(originserver代表真实server,weight权重,越大越优先)
cache_peer 192.168.2.12 parent 80 0 originserver weight=5 max-conn=30
cache_peer 192.168.2.13 parent 80 0 originserver weight=5 max-conn=30
cache_peer 192.168.2.14 parent 80 0 originserver weight=1 max-conn=8
http_access allow all(允许外部所有访问)
[root@localhost ~]# service squid restart
无心

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