apache(81端口)+squid(80端口)（apache和squid跑在同一个机器上面 要实现反向代理 ）我将我的外网域名用abc.com代替了
apache简单配置如下：
Listen 81
NameVirtualHost *
<VirtualHost *>
<Directory "/usr/local/www/">
Options
FollowSymLinks
AllowOverride None
Order
allow,deny
Allow from
all
Satisfy
all
</Directory>
ServerName
www.abc.com
ServerAdmin
webadmin@abc.com
DocumentRoot
"/usr/local/www/"
DirectoryIndex index.jsp
# ErrorLog
"/usr/local/apache/logs/abc-error_log"
# SetEnvIf
Remote_Addr "::1" dontlog
# CustomLog
"/usr/local/apache/logs/abc-access_log" combined env=!dontlog
</VirtualHost>
此时可以通过lsof -i:81查看谁占用81端口
确保http://www.abc.com:81
访问没有问题得到的是/usr/local/www发布的站点
开始squid的安装配置：
wget http://www.squid-cache.org/Versions/v3/3.0/squid-3.0.STABLE2.tar.gz
#useradd squid
#groupadd squid
#tar zxvf squid-3.0.STABLE2.tar.gz
#cd squid-3.0.STABLE2
#./configure --prefix=/usr/local/squid --disable-carp
--with-aufs-threads=32 --with-pthreads
--enable-storeio='ufs,aufs,coss,null'
--enable-disk-io='AIO,Blocking'
--enable-removal-policies='heap,lru' --disable-wccp
--enable-kill-parent-hack --disable-snmp --disable-poll
--disable-select --enable-auth=basic --with-aio
--disable-ident-lookup --with-filedescriptors=65536
#make
#make install
可能需要创建一些文件
这些都是配置文件中需要调用的（这个要注意文件的属主和权限）
#cd /usr/local/squid/var/logs/
#touch cache.log
#chmod 755 cache.log
#chown squid:squid cache.log
#touch page_zs_access_log
#chmod 755 page_zs_access_log
#chown squid:squid page_zs_access_log
#cd /usr/local/squid/etc/
# > squid.conf
# vi squid.conf(211.**.**.**为服务器的ip地址)
visible_hostname www.abc.com
http_port 80 vhost vport
cache_mem 512 MB
maximum_object_size_in_memory 2048 KB
memory_replacement_policy lru
cache_dir ufs /tmp 512 16 256
max_open_disk_fds 0
minimum_object_size 0 KB
maximum_object_size 32768 KB
logformat combined %>a %ui %un [%tl] "%rm %ru HTTP/%rv" %Hs
%<st "%{Referer}>h" "%{User-Agent}>h" %Ss:%Sh
access_log /usr/local/squid/var/logs/page_zs_access_log
combined
pid_filename
/usr/local/squid/var/logs/squid.pid
cache_store_log none
cache_peer 211.**.**.** parent
81 0 no-query no-digest originserver
name=www
cache_peer_domain www www.abc.com
cache_peer_access www allow all
http_access allow all
acl QUERY urlpath_regex cgi-bin .php .cgi .avi .wmv .rm .ram .mpg
.mpeg .zip .exe
cache deny QUERY
cache_effective_user squid
cache_effective_group squid
#/usr/local/squid/sbin/squid -k parse
可以根据这个测试命令用来验证squid.conf的语法和配置（下面是OK的如果不OK会有相应的提示根据提示来修改配置文件）
2008/03/19 15:29:48| Processing Configuration File:
/usr/local/squid/etc/squid.conf (depth 0)
#/usr/local/squid/sbin/squid -z
用来Creating Swap Directories