CentOS7.2搭建代理服务器

 

有时候内网很多机器都不能上外网，只能开放几个特定ip访问外网， 那么可以在这个可以上外网的机器上面搭建代理服务器，其他机器配置好代理就能上网了。

不管是测试用途还是自己使用，squid都是一个很不错的代理工具。支持正向代理、反向代理、还有透明代理。 本篇演示搭建了一个简单的squid的正向代理，同时支持认证，随便记记笔记。

安装

1 yum install squid -y

2 yum install httpd-tools -y

生成密码文件

mkdir /etc/squid3/

htpasswd -cd /etc/squid3/passwords mybai

##提示输入密码，在这里我输入是123456，注意密码不要超过8位

 

生成密码文件

/usr/lib64/squid/basic_ncsa_auth /etc/squid3/passwords 
 
 
 

   # 输入 用户名 密码 
 
 
 

   my-bai 123456 
 
 
 

   # 提示OK说明成功，ERR是有问题，请检查一下之前步骤 
 
 
 

   OK 
 
 
 

     
 
 
 

   # 测试完成，crtl + c 打断

配置

 

# 在最后添加 
 
 
 

   vim /etc/squid/squid.conf 
 
 
 

   auth_param basic program /usr/lib64/squid/basic_ncsa_auth /etc/squid3/passwords 
 
 
 

   auth_param basic realm proxy 
 
 
 

   acl authenticated proxy_auth REQUIRED 
 
 
 

   http_access allow authenticated 
 
 
 

     
 
 
 

   # 这里是端口号，可以按需修改 
 
 
 

   # http_port 3128 这样写会同时监听ipv6和ipv4的端口，推荐适应下面的配置方法。 
 
 
 

   http_port 0.0.0.0:3128

squid的权限控制很灵活，具体配置方法可以参考 官方文档， 或者 Squid中文权威指南， 具体工作原理有点像iptables，用规则去卡控流量。默认的配置只能允许内网用户访问，如果有更多需求，你还可以指定很多规则！权限控制

下面是我的配置实例：

# Example rule allowing access from your local networks.      


       # Adapt to list your (internal) IP networks from where browsing      


       # should be allowed      


acl all        src all        # RFC1918 possible internal network


       acl localnet src 10.0.0.0/8 # RFC1918 possible internal network      


       acl localnet src 172.16.0.0/12 # RFC1918 possible internal network      


       acl localnet src 192.168.0.0/16 # RFC1918 possible internal network      


       acl localnet src fc00::/7 # RFC 4193 local private network range      


       acl localnet src fe80::/10 # RFC 4291 link-local (directly plugged) machines      


              


       acl SSL_ports port 443      


       acl Safe_ports port 80 # http      


       acl Safe_ports port 21 # ftp      


       acl Safe_ports port 443 # https      


       acl Safe_ports port 70 # gopher      


       acl Safe_ports port 210 # wais      


       acl Safe_ports port 1025-65535 # unregistered ports      


       acl Safe_ports port 280 # http-mgmt      


       acl Safe_ports port 488 # gss-http      


       acl Safe_ports port 591 # filemaker      


       acl Safe_ports port 777 # multiling http      


       acl CONNECT method CONNECT      


              


       #      


       # Recommended minimum Access Permission configuration:      


       #      


       # Deny requests to certain unsafe ports      


       http_access deny !Safe_ports      


              


       # Deny CONNECT to other than secure SSL ports      


       http_access deny CONNECT !SSL_ports      


              


       # Only allow cachemgr access from localhost      


       http_access allow localhost manager      


       http_access deny manager      


              


       # We strongly recommend the following be uncommented to protect innocent      


       # web applications running on the proxy server who think the only      


       # one who can access services on "localhost" is a local user      


       #http_access deny to_localhost      


              


       #      


       # INSERT YOUR OWN RULE(S) HERE TO ALLOW ACCESS FROM YOUR CLIENTS      


       #      


              


       # Example rule allowing access from your local networks.      


       # Adapt localnet in the ACL section to list your (internal) IP networks      


       # from where browsing should be allowed      


       http_access allow localnet      


       http_access allow localhost      


              


       # And finally deny all other access to this proxy      


       http_access deny all

 

日志

squid的日志默认是打开的，位于目录/var/log/squid/，当然这个地址还有日志的格式都是可以完全自定义的

[root@controller161 ~]# ll /var/log/squid/      


       total 496      


       -rw-r----- 1 squid squid 355208 May 6 12:17 access.log      


       -rw-r----- 1 squid squid 1846 Jul 10 2016 access.log-20160710.gz      


       -rw-r----- 1 squid squid 3710 Jul 15 2016 access.log-20160718.gz      


       -rw-r----- 1 squid squid 125341 May 4 15:19 cache.log      


       -rw-r----- 1 squid squid 1325 Jul 9 2016 cache.log-20160710.gz      


       -rw-r----- 1 squid squid 1110 Jul 14 2016 cache.log-20160718.gz

 

启动服务

# 开启启动


enable


# 启动


       systemctl start squid.service      


# 停止


       systemctl stop squid.service      


# 重启


       systemctl restart squid.service

代理服务器设置

在其他CentOS机器上面配置各种代理方法

全局代理

vim /etc/profile，在最后加入

export http_proxy=       "http://username:password@proxy_ip:port"


export https_proxy=       "http://username:password@proxy_ip:port"

yum代理设置

编辑/etc/yum.conf，在最后加入

# Proxy      


       proxy=http://username:password@proxy_ip:port/

 

wget的代理设置

编辑/etc/wgetrc，在最后加入

# Proxy      


       http_proxy=http://username:password@proxy_ip:port/      


       https_proxy=http://username:password@proxy_ip:port/      


       ftp_proxy=http://username:password@proxy_ip:port/

 

curl的代理设置

在~/.bashrc里面增加一个别名:

alias curl=       "curl -x http://username:password@proxy_ip:port"

 

另外一种方法是编辑~/.curlrc文件 (没有就创建一个):

proxy = http://username:password@proxy_ip:port