Telnet服务设置三部曲

Telnet服务设置三部曲

Telnet是一个有效的远程登录协议。这里我们就来介绍一下Telnet服务的相关设置。那么我们主要通过几个简单的步骤来完成操作。那么具体的内容如下：

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 off

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!