使用squid代理时出现 The requested URL could not be retrieved

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问题：
当使用代理访问网站时出现以下错误：
========================================
The requested URL could not be retrieved

While trying to retrieve the URL: http://linkhelp.clients.google.com/tbproxy/lh/fixurl?

The following error was encountered:

    Unable to determine IP address from host name for linkhelp.clients.google.com

The dnsserver returned:

    Timeout

This means that:

 The cache was not able to resolve the hostname presented in the URL.
 Check if the address is correct.

Your cache administrator is root.
========================================

解决方法：
这是由于代理服务器机器的DNS配置问题，代理服务器机器不能找到指定url的ip地址导致。检查/etc/resolv.conf文件配置是否正确，如不正确添加正确的配置信息，比如说：
nameserver ###.###.###.###
nameserver ###.###.###.###
可以配置多个DNS server。
重新启动squid服务。

           

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