SQUID

squid正向代理

1.讓虛擬機可以上網

vim /etc/sysconfig/network-scripts/ifcfg-eth0
GATEWAY=172.25.254.250                             ###通過250的電腦讓虛擬機上網
DNS1=114.114.114.114
systemctl restart network

測試

route -n                                      ###查看網關
ping www.qq.com

2.squid安裝和配置更改172.25.254.117

yum install -y squid            ##安裝正向代理
vim /etc/squid/squid.conf       ##修改配置文件
 55 # And finally deny all other access to this proxy
 56 http_access allow all       ##允許訪問
 57 
 58 # Squid normally listens to port 3128
 59 http_port 3128
 60 
 61 # Uncomment and adjust the following to add a disk cache directory.
 62 cache_dir ufs /var/spool/squid 100 16 256   ##創建緩存地點 100M 16個目錄 256個子級目錄
systemctl start squid       ##開啓服務
netstat -lntup|grep squid   ##查看端口
如果防火牆未關
firewall-cmd --permanent --add-port=3128/tcp        ##
firewall-cmd --reload                   ##

在真機中打開瀏覽器設置代理服務器的ip地址（172.25.254.117）
用真機打開一個網頁就可以正常上網

squid反向代理

1.準備兩臺虛擬機ip地址分別爲真機ip+100 真機ip+200
2.在172.25.254.217中：

yum install -y squid
vim /etc/squid/squid.conf
    55 # And finally deny all other access to this proxy
    56 http_access allow all        ##允許訪問
    57 
    58 # Squid normally listens to port 3128
    59 http_port 80 vhost vport
    60 cache_peer 172.25.254.117 parent 80 0 no-query
    61 # Uncomment and adjust the following to add a disk cache directory.
    62 cache_dir ufs /var/spool/squid 100 16 256    ##創建緩存地點 
systemctl start squid
systemctl stop firewalld

測試：
打開遊覽器輸入172.25.254.217這時會訪問到117

輪詢

需要至少兩臺已經配置好apache的虛擬機和一臺代理緩存（217）

vim /etc/squid/squid.conf
    cache_peer 172.25.254.117 parent 80 0 no-query originserver round-robin name=webserver1
    cache_peer 172.25.254.125 parent 80 0 no-query originserver round-robin name=webserver2
    cache_peer_domain webserver1 webserver2 www.westos.com

    # 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

在瀏覽器所在的主機添加解析
    vim /etc/hosts