Problems using Kerberos telnet

[Someone]

Turbo Fredriksson wrote:

> Quoting Someone <please at nospam.net>:
> 
> 
>>Hello, I am using MIT kerberos v1.2.3 on a Linux machine, I have 
>>activated the kerberized telnet daemon in inetd.conf like that:
>>
>>telnet  stream  tcp     nowait  root    /usr/sbin/tcpd 
>>/usr/local/sbin/telnetd -a valid
>>
>>
>>And then I am using the kerberized telnet client to login to my host (to 
>>test) but I cannot, see the following output:
>>
>> > telnet localhost
>>Trying 127.0.0.1...
>>Connected to localhost (127.0.0.1).
>>Escape character is '^]'.
>>telnetd: No authentication provided.
>>Connection closed by foreign host.
>>
>>Do I need to do anything special ? I have received a ticket from my KDC 
>>and that host has a keytab file.
>>
> 
> Try 
> 
>         telnet -x localhost
> 
> Do you have a service key for 'localhost'?
> 

I tryed -x and I get the following error message:

Waiting for encryption to be negotiated...

Authentication negotation has failed, which is required for
encryption.  Good bye.

What is a service key exactly ? I don't recall that I have one. What I 
know that I have is a keytab for my host yes.

Regards