可以ping通，并且linux下telnet也是可以通信的，请问这是什么原因呢？
2017/07/19 11:10:11 an error!dial tcp 39.108.236.252:7778: connectex: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
exit status 1
有疑问加站长微信联系（非本文作者）
