Aws获得权利问题主机未解决

Question

我遇到aws php sdk的问题，getentitlments主机无法解析

AWS HTTP错误：cURL错误6：无法解析主机：entitlement.marketplace.us-east-2.amazonaws.com（请参阅http://curl.haxx.se/libcurl/c/libcurl-errors.html）＆＃39;