http://www.jackxiang.com/index.php zh-cn http://www.jackxiang.com/post// jack <xdy108@126.com> Tue, 06 May 2014 12:33:31 +0000 http://www.jackxiang.com/post// ssh作连接时：
[root@localhost ~]# ssh -l xiangdong 192.168.1.108
Address 192.168.1.108 maps to localhost, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!
xiangdong@192.168.1.108's password:
Last login: Tue May  6 16:10:52 2014 from 10.70.38.87
/etc/sysconfig/bash-prompt-xterm: line 1: ifconfig: command not found ==》 yum install -y net-tools

一般是在配置无密码登录时引起的：
http://hi.baidu.com/tanggaohui/item/4fcf24372225143f2f20c4d0

GSSAPIAuthentication  这个设置项到底是什么作用了 ？
在securecrt 关闭、开启 GSSAPI，在登陆服务器时好像没什么影响。。。
答：这个是可选，而且和顺序有关，你如果使用密码认证，你进系统，和下面那个都无任何关系


ssh连接远程服务器，报警信息 Address X.X.X.X maps to localhost, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT! 如下:
[root@upgirl ~]# ssh root@192.168.0.203
Address 192.168.0.203 maps to localhost, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!
root@192.168.0.203's password:
Last login: Thu Feb 21 03:01:49 2013 from desktop100.example.com

解决方法：修改本机ssh_config文件
[root@h3 ~]# vim /etc/ssh/ssh_config
GSSAPIAuthentication no

测试OK：
[root@upgirl ~]# ssh root@192.168.0.203
root@192.168.0.203's password:
Last login: Thu Feb 21 03:55:05 2013 from 192.168.0.11

来自：http://www.07net01.com/linux/sshlianjiebaojingdoes_not_map_back_to_the_address___POSSIBLE_BREAK_70559_1361425847.html
参考：http://jafy00.blog.51cto.com/2594646/810716

项目中利用ssh和rsync同步和分发文件，发现ssh登录和传输速度都很慢，问题按照如下方式解决
客户端进行如下修改
echo "GSSAPIAuthentication no" >> ~/.ssh/config
服务端
vi /etc/ssh/sshd_config
按照下面两项修改
GSSAPIAuthentication no
UseDNS no
来自：http://menjoy.iteye.com/blog/287375 ]]> http://www.jackxiang.com/post//#blogcomment <user@domain.com> Thu, 01 Jan 1970 00:00:00 +0000 http://www.jackxiang.com/post//#blogcomment