linux ssh 报错failed - POSSIBLE BREAK-IN ATTEMPT

问题故障：

　　今天在新租的虚拟机上，发现ssh登陆机器的时候报错，如下：

[root@pictures_new3 ~]# ssh [email protected]

The authenticity of host '122.122.122.111 (122.122.122.111)' can't be established.

RSA key fingerprint is cb:8a:f6:0f::9c:6c::ea:4a:e0:1d:6f::a2:ba.

Are you sure you want to continue connecting (yes/no)? yes

Warning: Permanently added '122.122.122.111' (RSA) to the list of known hosts.

reverse mapping checking getaddrinfo for scdc.worra.com [122.122.122.111] failed - POSSIBLE BREAK-IN ATTEMPT!

Last login: Fri Apr  ::  from 58.71.118.58

[root@PI05P01 ~]#

# 搜索相关资料后，发现只需要如下操作，即可解决问题

[root@PI05P01 ~]# sed -i 's/#   GSSAPIAuthentication no/GSSAPIAuthentication no/' /etc/ssh/ssh_config

[root@PI05P01 ~]# sed -i 's/#   GSSAPIAuthentication no/GSSAPIAuthentication no/' /etc/ssh/sshd_config

[root@PI05P01 ~]# /etc/init.d/sshd restart

# 经验证后，不再报错。