colinux with debianで

sshを使おうと思ったんだけど、PAMのChallengeResponseAuthentication=yesにするとパスワード認証の後

# ssh guest@192.168.0.40
Password:
Connection closed by 192.168.0.40

こんな感じで失敗する。PAMを使わないと

# ssh guest@192.168.0.40
guest@192.168.0.40's password:
Last login: Wed Mar 14 09:53:58 2007 from 192.168.0.40
Linux colinux 2.6.11-co-0.6.4 #1 Mon Jun 19 05:36:13 UTC 2006 i686 unknown

Most of the programs included with the Debian GNU/Linux system are
freely redistributable; the exact distribution terms for each program
are described in the individual files in /usr/share/doc/*/copyright

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
guest@colinux:~$

うまく行きます。PAM絡みのどっかがおかしいんだろうけど、追求するのが面倒なのでpendingということで。