ssh to server msg: POSSIBLE BREAK-IN ATTEMPT

when i ssh to a server,i get some message like this：

Address 192.168.5.12 maps to localhost, but this does not map back to the address – POSSIBLE BREAKIN ATTEMPT!

Solution：

Modify the "/etc/ssh/ssh_config" file at localhost

 GSSAPIAuthentication no

exp：

ssh 192.168.1.110时报错上述错，本地是192.168.1.20 ，则修改本地192.168.1.20中的/etc/ssh/ssh_config，把参数GSSAPIAuthentication no修改就可以了。。或者修改服务器端192.168.1.110上的/etc/ssh/sshd_config ，把参数GSSAPIAuthentication no改了也可以。要注意的是/etc/ssh/ssh_config和/etc/ssh/sshd_confg的区别。