3-squid服務
######squid正向代理######
##借助代理訪問客戶端訪問不到的地址
1.安裝服務
yum install squid -y
systemctl start squid
2.##第三方主機訪問網絡
vim /etc/squid/squid.conf
52 http_access allow localnet
53 http_access allow localhost
54
55 # And finally deny all other access to this proxy
56 http_access allow all ##允許所有http服務訪問
57
58 # Squid normally listens to port 3128
59 http_port 3128##訪問端口3128
60
61 # Uncomment and adjust the following to add a disk cache directory.
62 cache_dir ufs /var/spool/squid 100 16 256 ##查詢的目錄和文件數目
63
systemctl restart squid ##重啟服務
測試：
瀏覽器設置Advance >Network >Setings
訪問：www.taobao.com
3.##訪問不了www.baiducom，其余都可以
vim /etc/squid/squid.conf
52 acl badurl dst www.baidu.com
53 http_access deny badurl ##www.baidu.com加入黑名單
54 http_access allow localnet
55 http_access allow localhost
56
57 # And finally deny all other access to this proxy
58 http_access deny all
59
60 # Squid normally listens to port 3128
61 http_port 3128
62
63 # Uncomment and adjust the following to add a disk cache directory.
64 cache_dir ufs /var/spool/squid 100 16 256
65
systemctl restart squid
4.##訪問不了baidu的網絡
vim /etc/squid/squid.conf
52 acl badurl dstdomain .baidu.com
53 http_access deny badurl ##.baidu.com加入黑名單
54 http_access allow localnet
55 http_access allow localhost
56
57 # And finally deny all other access to this proxy
58 http_access deny all
59
60 # Squid normally listens to port 3128
61 http_port 3128
62
63 # Uncomment and adjust the following to add a disk cache directory.
64 cache_dir ufs /var/spool/squid 100 16 256
65
systemctl restart squid
########squid反向代理#######
vim /etc/squid/squid.conf
59 http_port 80 vhost vport##反向代理端口為80
60 cache_peer 172.25.254.134 parent 80 0 no-query ##設置訪問域名的ip為172.25.254.134 端口80 no-query不查詢
61
systemctl restart squid
#####平分訪問主機的壓力#######
vim /etc/squid/squid.conf
59 http_port 80 vhost vport
60 cache_peer 172.25.254.134 parent 80 0 no-query originserver name=web1 round-robin weight=3
##設置訪問域名的ip為172.25.254.134 端口80 no-query不查詢，直接獲取數據，名字web1，round-robin輪流查詢，web1三次
61 cache_peer 172.25.254.111 parent 80 0 no-query originserver name=web2 round-robin weight=1
##設置訪問域名的ip為172.25.254.111 端口80 no-query不查 詢，直接獲取數據，名字web2，round-robin輪流查詢，web2一次
62 cache_peer_domain www.westos.com web1 web2 ##指定域名www.westos.com訪問的ip是web1和web2
systemctl restart squid
瀏覽器訪問
vim /etc/hosts
172.25.254.111 www.westos.com
172.25.254.134 www.westos.com
訪問：www.westos.com
訪問172.25.254.134 三次
訪問172.25.254.134 一次
3-squid服務