isConnected failed: ECONNREFUSED (Connection refused)

[weixin_38058939]

@焙焙龙 你好，想跟你请教个问题： 你好  05-30 18:14:47.147: W/System.err(21681): java.net.ConnectException: failed to connect to /218.18.232.202 (port 33333) after 90000ms: isConnected failed: ECONNREFUSED (Connection refused) 05-30 18:14:47.147: W/System.err(21681): at libcore.io.IoBridge.isConnected(IoBridge.java:267) 05-30 18:14:47.147: W/System.err(21681): at libcore.io.IoBridge.connectErrno(IoBridge.java:191) 05-30 18:14:47.147: W/System.err(21681): at libcore.io.IoBridge.connect(IoBridge.java:127) 05-30 18:14:47.147: W/System.err(21681): at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:188)  telnet 218.18.232.202 33333不通  防火墙已经关闭了  怎么查看端口是否打开