无法ssh登陆上，求助。

我电脑的系统是 mac osX 10.10.3
ECS的系统是 ubuntu 14.04
之前用别的电脑ssh都没有问题，
今天想用mac登陆以下，
就遇到登陆不了的问题了。
以下的登陆的情况：

ssh -vvvv root@112.126.**.71

OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011
debug1: Reading configuration data /Users/jhuang/.ssh/config
debug1: Reading configuration data /etc/ssh_config
debug1: /etc/ssh_config line 20: Applying options for *
debug1: /etc/ssh_config line 102: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to 112.126.**.71 [112.126.**.71] port 22.
debug1: connect to address 112.126.**.71 port 22: Connection refused
ssh: connect to host 112.126.**.71 port 22: Connection refused