squid 安装，配置

sqtsqt

　　更新库：apt-get update
安装：apt-get install squid squid-common
　　ubuntu 12.04  安装的 squid3
 
配置和开启
   配置文件：vi /etc/squid.conf
   3.1监听端口
      http_port 3128
   3.2 访问控制
      http_access allow all
   3.3开启squid3
      3.3.1 初始化squid.conf里的cache目录
           /usr/sbin/squid3 -z
      3.3.2 对squid.conf进行排错
           /usr/sbin/squid3 -k parse
      3.3.3 前台启动squid3
           /usr/sbin/squid3 -N -d1
      3.3.4后台运行squid3
           /usr/sbin/squid3 -s
      3.3.5 停止
           /usr/sbin/squid3 -k shutdown
      3.3.5 重新引导修改过的squid.conf
           /usr/sbin/squid3 -k reconfigure
　　配置：

# Recommended minimum configuration:
#
acl manager proto cache_object
acl localhost src 127.0.0.1/32 ::1
acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1
# Example rule allowing access from your local networks.
# Adapt to list your (internal) IP networks from where browsing
# should be allowed
#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
##auth_param basic program <uncomment and complete this line>
auth_param basic program /usr/lib/squid3/ncsa_auth /etc/squid3/passwd
auth_param basic children 5
##auth_param basic realm Squid proxy-caching web server
auth_param basic casesensitive off
auth_param basic credentialsttl 2 hours
#Default:
# none
## zi ding yi pei zhi
acl auth_user proxy_auth REQUIRED

#default:
# http_access deny all
#
http_access allow auth_user
#
# recommended minimum access permission configuration:
#
# only allow cachemgr access from localhost
http_access allow manager localhost
http_access deny manager
# 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
# 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

# Squid normally listens to port 3128
http_port 3128
#Default:
# coredump_dir none
#
# Leave coredumps in the first cache dir
coredump_dir /var/spool/squid3

# Add any of your own refresh_pattern entries above these.
refresh_pattern ^ftp:           1440    20%     10080
refresh_pattern ^gopher:        1440    0%      1440
refresh_pattern -i (/cgi-bin/|\?) 0     0%      0
refresh_pattern (Release|Packages(.gz)*)$      0       20%     2880
# example lin deb packages
#refresh_pattern (\.deb|\.udeb)$   129600 100% 129600
refresh_pattern .               0       20%     4320

　　#缓存服务器的名字，可以任意  
　　visible_hostname 80sds
 
auth_param basic program /usr/lib/squid/ncsa_auth /opt/squid/etc/passwd
#定义了认证方式为basic，认证程序的路径和认证程度需要读取的帐户文件

auth_param basic children 5
#此选项定义了认证程序的进程为5个

auth_param basic credentialsttl 2 hours
#定义了认证程序的时间为2小时，如果2小时过后用户还需要使用squid,则必须重新输入帐户和密码

auth_param basic realm Please input account
#定义了用户的登录时显示的领域内容（信息），类似于Apache的用户认证

auth_param basic casesensitive off
#指定是否区分用户名大小写，on为区分，off为不区分。
　　
acl auth_user proxy_auth REQUIRED
# 强制要求用户验证

http_access allow auth_user
#普通用户需要认证才能访问internet，允许经过认证的用户访问。