help:Is there any kerberos version of ssh

Sun Apr 17 21:57:47 EDT 2005

Hello !
Is there any kerberos version of ssh ? 
When i config the /etc/ssh/sshd_config which is sshd's config file,there are some options as follows:
# Kerberos options
# KerberosAuthentication automatically enabled if keyfile exists
#KerberosAuthentication yes
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes
How can i use ssh with the kerberos authentication ?
Thanks very much!!

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