透明**问题

经过努力现在内网ping外网也通了，现在就是
内网的ie浏览外网时显示的还是


The requested URL could not be retrieved

--------------------------------------------------------------------------------

While trying to retrieve the URL: http://www.google.com/webhp?

The following error was encountered:

Access Denied.
Access control configuration prevents your request from being allowed at this time. Please contact your service provider if you feel this is incorrect.

Your cache administrator is webmaster.



--------------------------------------------------------------------------------

Generated Wed, 11 Aug 2004 13:38:33 GMT by du.com (squid/2.5.STABLE3)






一：
网关 192.168.1.1
ifconfig_vr0="inet 192.168.1.2 netmask 255.255.255.0" 外
ifconfig_vr1="inet 192.168.2.1 netmask 255.255.255.0" 内

ipnat.rules

rdr vr1 0.0.0.0/0 port 80 -> 192.168.2.1 port 3128 tcp/udp


ipnat.rules 文件我应该怎么写？才能透明**。
还有是不是不用装squid也能透明**， ipnat.rules中设置就行了？