1、确定你的telnet服务打开没有:
[root@111 ~]# chkconfig --list|grep telnet
ekrb5-telnet: off
krb5-telnet: off
[root@111 ~]#
注意检查结果这里是关闭状态
2、打开telnet服务:
[root@111 ~]# chkconfig krb5-telnet on
[root@111 ~]# chkconfig --list|grep telnet
ekrb5-telnet: offv
krb5-telnet: on
[root@111 ~]#
检查已经被打开了
3、修改登陆文件securetty,主要增加要登陆的终端点
[root@111 ~]# vi /etc/securetty
增加如下几行:
pts/1
pts/2
pts/3
pts/4
pts/5
……
保存退出即可。
如果是chkconfig krb5-telnet on
会提示Unencrypted connection refused. Goodbye.Connection closed by foreign host.看错误信息好像是说的为加密的连接被拒绝,查看了他的配置文件也没发现有什么关于加密的选项,而且配置文件也很正确,于是到google上去搜索了一大圈,最后终于找到一个老外写的一个解决方法:
I really needed a bit of guidance and you provided it./sbin/chkconfig --list |grep telnetThe above command told me I had both krb5-telnet and ekrb5-telnet, andalso the installed telnet all on. Initially I did not know what theywere all for. After turning them on and off and testing my telnetconnection from another box I realised that "ekrb5-telnet" was theencrypted telnet server that I needed to turn off to run "krb-telnet"which allowed non-encrypted telnet connections.eg /sbin/chkconfig ekrb5-telnet offThanks for your help.
原来ekrb5-telnet是一个需要加密的telnet服务,把这个服务启动上当然就需要加密了。解决方法:将/etc/xinetd.d/ekrb5-telnet里面的disable改成=yes,再重启xinetd服务service xinetd restart就OK了!
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