telnet的怪异问题

    今天遇到这样一个telnet连接的怪异问题，问题是：使用telnet连接的时候报如下错

# telnet 10.133.128.70
Trying 10.133.128.70...
Connected to zxj_db1 (10.133.128.70).
Escape character is '^]'.
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 telnet



The above command told me I had both krb5-telnet and ekrb5-telnet, and
also the installed telnet all on. Initially I did not know what they
were all for. After turning them on and off and testing my telnet
connection from another box I realised that "ekrb5-telnet" was the
encrypted telnet server that I needed to turn off to run "krb-telnet"
which allowed non-encrypted telnet connections.



eg /sbin/chkconfig ekrb5-telnet off



Thanks for your help.

原来在系统里面把ekrb5-telnet这个服务也启动了，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服务就OK了！