一、系统环境
操作系统：CentOS release 6.5
Squid版本：squid-3.1.10-20.el6_5.3.x86_64
SELINUX=disabled
HTTP Service: stoped
二、安装Squid服务
2.1 检查squid软件是否安装
# rpm -qa|grep squid
2.2 如果未安装，则使用yum 方式安装
# yum -y install squid
2.3 设置开机自启动
# chkconfig --level 35 squid on //在3、5级别上自动运行squid服务
三、squid服务器的配置文件说明
squid 的主配置文件是 /etc/squid/squid.conf，所有squid的设定都是在这个文件里配置
http_port 3128 //设置监听的IP与端口号cache_mem 64 MB //额外提供给squid使用的内存，squid的内存总占用为 X * 10+15+“cache_mem”，其中X为squid的cache占用的容量（以GB为单位）， //比如下面的cache大小是100M，即0.1GB，则内存总占用为0.1*10+15+64=80M，推荐大小为物理内存的1/3-1/2或更多。 maximum_object_size 4 MB //设置squid磁盘缓存最大文件，超过4M的文件不保存到硬盘minimum_object_size 0 KB //设置squid磁盘缓存最小文件maximum_object_size_in_memory 4096 KB //设置squid内存缓存最大文件，超过4M的文件不保存到内存cache_dir ufs /var/spool/squid 100 16 256 //定义squid的cache存放路径 、cache目录容量（单位M）、一级缓存目录数量、二级缓存目录数量logformat combined %>a %ui %un [%tl] "%rm %ru HTTP/%rv" %Hs %<st "%{Referer}>h" "%{User-Agent}>h" %Ss:%Sh //log文件日志格式access_log /var/log/squid/access.log combined //log文件存放路径和日志格式cache_log /var/log/squid/cache.log //设置缓存日志logfile_rotate 60 //log轮循 60天cache_swap_high 95 //cache目录使用量大于95%时，开始清理旧的cachecache_swap_low 90 //cache目录清理到90%时停止。acl localnet src 192.168.1.0/24 //定义本地网段http_access allow localnet //允许本地网段使用http_access deny all //拒绝所有visible_hostname squid.david.dev //主机名cache_mgr [email protected] //管理员邮箱
四、普通代理服务
4.1 编辑squid 主配置文件/etc/squid/squid.conf
#
# 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
#
# 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 allow all
# Squid normally listens to port 3128
http_port 3128
# We recommend you to use at least the following line.
hierarchy_stoplist cgi-bin ?
cache_mem 512 MB
# Uncomment and adjust the following to add a disk cache directory.
cache_dir ufs /var/spool/squid 20480 16 256
cache_log /var/log/squid/cache.log
cache_access_log /var/log/squid/access.log
cache_store_log /var/log/squid/store.log
visible_hostname 192.168.3.34
cache_mgr [email protected]
# Leave coredumps in the first cache dir
coredump_dir /var/spool/squid
# 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 . 0 20% 4320
4.2 初始化
# squid –z
4.3 防火墙配置
用编辑器打开/etc/sysconfig/iptables ，添加开放端口
-A INPUT -m state --state NEW -m tcp -p tcp --dport 3128 -j ACCEPT
[[email protected] ~]# service iptables restart
4.4 启动Squid
# /etc/init.d/squid start
五、在路由器中映射本机IP至端口的固定IP，测试代理服务