squid服务器配置认证连接方法。内部DNS服务器连接不了

squid服务器配置认证连接方法。内部DNS服务器连接不了
我架了一台SQUID服务器，squid.conf文件配置如下 :
sible_hostname squid.wg315.com
http_port 80 accel vhost vport
http_port 80 vhost vport=80
httpd_accel_host 192.168.1.86 #这个是内部DNS服务器
httpd_accel_port 80
httpd_accel_single_host on
httpd_accel_with_proxy on
httpd_accel_uses_host_header off
acl all src 0.0.0.0/0.0.0.0
http_access allow all
cache_mgr vsyour@QQ.com
这样会提示错误：

ERROR
The requested URL could not be retrieved

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While trying to retrieve the URL: http://squid.wg315.com/

The following error was encountered:

Unable to forward this request at this time.
This request could not be forwarded to the origin server or to any parent caches. The most likely cause for this error is that:

The cache administrator does not allow this cache to make direct connections to origin servers, and
All configured parent caches are currently unreachable.
Your cache administrator is vsyour@QQ.com.



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Generated Tue, 06 Oct 2009 12:20:03 GMT by localhost.localdomain (squid/2.6.STABLE21)