Linux_SquidProxyServer代理服务器

目录

​​目录​​​​Squid proxy server​​

  • ​​Web proxy server operating principle​​
  • ​​Squid features​​website是什么意思
  • ​​Setlinux命令up squid server​​
  • ​​Setup transparent proxy​​
  • ​​Squit authentication​​
  • ​​Setuplinux常用命令 the Reverse Proxy Server​​
  • ​​Case set the transparent proxy代理服务器地址​​

Squid代理服务器出现问题 proxy server

Squidserver翻译是基于Unix的代理服务器(proxy server),支持缓存多种不同的网络对象,包括那代理服务器地址些通过HTTP和FTP访问的对象。缓存频繁访问的网页、媒体文件等,实系统/运维现加速应答时间并减少带宽堵塞。Sqlinux是什么操作系统uid通过追踪网络中的对象来实现作用。Squid最初担当webstorm中介,仅仅是把客户请求传递到服务器并存储请求对象的副本。如果同一个用户或同一批用户再次请求还缓存(cache)在Squid中的相同对象时,Squid能够立即服务,加速下载并保存带宽。Squid代理服务server翻译器提供更快的server系统下载速度、缩短延迟时间,尤其是在提供丰富媒体和流式视频方面。网站经营者将频繁地把Squid代理服务器作为内容加速器、频繁查看内容的缓存和网络服务器的容位负载。内容发布网络和媒体公司会采用Squid代理服务器,并在整个网络中部署它们来改善浏览者的访问体验,特别是对流式内容的负载平衡(load balancing)linux系统安装和处理访问高峰等方面的优化有显著效果。

Squid can proxy http ftp ssl protocol.

Effect​:Proxy server helps client users to g系统运维工程师ets and cache the data from targeted h代理服务器没有响应ost. Realize more fas代理服务器没有响应是什么原因t and more secure what acce代理服务器怎么设置ss web pserver2008rotal.

Web proxy server operating principle

Cache web element object(static text,picture),reduce mu代理服务器没有响应ltiple reqproxy+serveruest.

1. Forward Proxy(SNAT)

2. Reverse Prserver怎么读oxy(DNAT)

Achieve firewall function via domain name limit(applicatioserver是什么意思nweb前端 layer).

Forwar代理服务器没有响应是什么原因d proxy:

1. Typical proxy: need setup proxy’s ip and port by manual in thelinux重启命令 browser.

2. Transparent p代理服务器出现问题或者地址有误roxy: host gateway IP assign to proxy se代理服务器没有响应rver

Squid代理服务器连接失败 features

Software​:squid-3.1.10-1.e16_2.4.X86_64

Service​:squid

Configure file​:/etc/squid/squid.con代理服务器f

Sweb前端quid control module store dirextory​: /userver怎么读sr/lib64/sqweb浏览器uid/

Config option​:

http_port     squidServerIP:3128
cache_mem 64 MB #one half as cache(64MB) when the mem > 2G
cache_dir nfs /var/spool/squid 100 16 256
#100 --> Total disk space < 100M
#16 --> Total directory < 16
#256 --> Total level2 directory in the level1 directory
visible_hostname proxy.fan.com #if have not hostname and this option, the proxy server can not start.
dns_testnames www.baidu.com
reply_body_max_size 10 MB #forbid download the file when the file size greater than 10MB
minimum_object_size 0kb #don't cache data when the data count less than Xkb, 0 the meaning is no limit.
maximum_object_size 4096kb #don't cache date when the data greater than Xkb

ACL list control mode.

1. Format:

acl    listName listType listContent
http_access allow/deny listName
http_access allow/deny "url" #import url of ACLlist file,Create file for store ACLList when the ACLList have too much.

Example​:Deny cache wewebproxyonlineb paper

acl deny php,...
cache_deny:deny php

Acl list type:

src:source address     #Can define network segment example:IP or continuous IP. 192.168.1.10-192.168.1.20/24
dst:destination address
port:destination port
srcdomain:source domain
dstdomain:destination domain
time:access time,general the parameter is range, example:09:30-17:30
maxconn:max concurrency connect
url_regex:destination url address, example : ^rtsp:// #Beginning with this type
urlpath_regex:complete destination url path, example: -i Sex adult

Setup squid server

step1​. General squid

yum install -y squid

step2​. Edit configurawebstormtion file

viserver翻译m /etc/squid/squid.conf

http_port 10.20.0.210(proxyServerIP):3182
reply_body_max_size 10MB
cache_dir nfs /var/spool/squid 100 16 256
visible_hostname proxy.fan.com

Attention​:Frist make DNS analysis as IP in the cserver翻译lient then send the data package to squid server代理服务器, but squidlinux常用命令 do not proxy DNS server, so should be sewebproxyonlinetup SDNA and use it to connect DNS in the squid server.

Setup transparent proxy

Transparent proxy can’t support 443 port

step1​.Edit config file

vim /etc/squid/squid.conf

http_port ServerIP:3128        transparent

steserver服务器p2​. Set thelinux系统安装 iptables rules

iptables -t nat -A PREROUTING -i eth1 -s 192.168.4.0/24 -p tcp --dport 80 -j REDIRECT --to-port 3128

Attention​:

iptables -t nat -A PREROUTING -i eth1 -s 192.168.4.0/24 -p tcp --dport 443 -j REDIRECT --to-port 3128
#Will 80 port access session assign to squid server's 3128 port, resolve way is use the SNAT.

step3​. Set the ACL rules

acl worktime time D 9:00-17:30
acl burl urlpath_regex -i game \.mp3$
http_deny burl
http_access allow localnet worktime

Squit authentication

Transparent proxy don’t use authentication ,but the classical proxy系统/运维 can.

step1​. Add authentition module.

/usr/lib64/squid/ncsa_auth --> authentication mudule

step2​. Set authentication parameter in the main config fweb浏览器ile.

step3​. Set authentication ACL

acl auth_user proxy_auth REQUIRED
http_access allow auth_user

step4​. Creatproxyserverliste authentication account

vim s代理服务器连接失败quid.server酱conf

acc auth_user proxy_auth REQUIRED
http_access auth_user
auth_param basic program /usr/lib64/squid/ncsa_auth /etc/squid/auth_user.txt #Frist line in the config file. Specify user list file for ncsa_auth authentication module
htpasswd -c /etc/squid/auth_user.txt jmilk    #create user list file, you have to install httpd service to use command htpasswd
cat /etc/squid/auth_user.txt

vim /etc/squid/squid.clinux重启命令onf

auth_param basic children 5 --> deal with 5 concurrent authentication 
auth_param basic realm Squid proxy-caching web --> welcome page
auth_param basic credentialstt2 2 hours --> timeout

step5​. Set the speed limit for every IP.

delay_pools 1   #relay pool number
delay_class 1 3
#1 --> relay pool number
#3 --> specify network type to B;1: one IP;2:type C;3:type B;4: type A
delay_access 1 allow localnet #usr acl:localnet
delay_parameters 1 -1/-1 20000/20000(byte)
#-1/-1 --> all network segment
#20000/20000 --> no limit download speed before 200M/speed limit beyond 200M

Setup the Reverse Proxweb前端三大主流框架y Server

Web 服务器容易出现负载瓶颈,有下面解决办法

1. Web服务器集群

2. 使用反向web前端三大主流框架代理服务器

反向代理服务器server是什么意思中文翻译​:类似DNS以缓存的方式系统运维工作内容,减轻web server的压力

Listen 80

no set ACL,server是什么意思 allowwebsite是什么意思 all

step1​.

vim squid.conf

http_port ProxyServerIP:80 vhost
cache_peer WebServerIP parent 80 0 originserer
http_access allow

Case: set the transparent proxy

vim squid.conf

http_port squidServerIP:3128 transparent
visible_hostname transparent.fan.com
cache_dir ufs /var/spool/squid 100 16 256
cache_mem 1024 MB

对超过3MB大小的文件不做缓存,禁止下载超过100M的文件

maximum_object__size 3 MB
reply_body_max_size 100 MB

启用网址过滤,禁止访问带有”Sex”,”adult”字样的链接

acl burl urlpath_regex -i Sex adult
#-i --> key word
http_access deny burl

配置Squid使用基本的身份认证,并且创建用户jmilk,只有通过身份认证后才可以使用sServerquid上网。(透明代理不支持,只有传统代理支持)

vim squid.conf

acl auth_user proxy_auth REQUIREP|-i userName     #支持所设定的用户|支持用户列表
http_access allow auth_user
htpasswd -c /etc/squid/auth_user.txt jmilk
cat /etc/squid/auth_user.txt

vim squid.conf

auth_param basic program /usr/lib64/squid/ncsa_auth /etc/squid/auth_user.txt    #put it in frist line
auth_param basic children 5 #一次可以处理5个并发认证
auth_param basic realm Hellow! #设定欢迎页面
auth_param basic credentialsttl 2 hours #一次用户认证的有效时间

设置客户端192.168.1.52代理服务器在上班时间的最高下载速度为150k/s

acl worktime time D 9:00-24:00  #D (周一到周五)  DSA全周
acl lan src 192.168.1.52/32
delay_pools 1 #限速池1,为每个限速对象定序号
delay_class 1 2 #声明1号池的IP类型为C类IP地址
delay_access 1 allow worktime lan
delay_parameters 1 -1/-1 150000/2000000