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From: Cedric Veilleux (cedric_at_neopeak.com)
Date: Fri 12 Mar 2004 - 16:38:22 GMT


Hi,

    After upgrading from an old-world 2.4.20ctx-17 to 2.4.25-vs1.26, I
can no longer login to an SSH server running inside a vserver.

    Beside the change to the host server, nothing has changed with the
virtual server.

    When login in with openssh's ssh client, it just hangs there
indifinately after asking for the password. When login with putty, I get
the message "Server refused to allocate pty".

    I tried to change the shell of the user of the vserver from bash to
sash (static shell), and I was able to login into a somehow broken
shell. Here's the output of me logging in and then typing the 'w'
command:

------------------------------------------------------------------------
bash-2.05b$ ssh root_at_vserver.host.com
root_at_vserver.host.com's password:
$ readline: warning: rl_prep_terminal: cannot get terminal settings
11:22:53 up 3 days, 20:43, 0 users, load average: 0.00, 0.00, 0.00
                                                                                                                                         USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
                                                   $ readline: warning:
rl_prep_terminal: cannot get terminal settings
------------------------------------------------------------------------

   I did some research on the "rl_prep_terminal: cannot get terminal
settings" error message, but didn't find anything.

   I checked if the proper devices were setup inside the vserver. I am
not sure what should be there, but I haven't changed anything and it did
work before the upgrade..

Content of /dev:
------------------------------------------------------------------------
crw-rw-rw- 1 root root 1, 7 Dec 21 2002 full
prw------- 1 root root 0 Mar 10 14:31 initctl
srw-rw-rw- 1 root root 0 Mar 10 15:00 log
crw-rw-rw- 1 root root 1, 3 Dec 21 2002 null
crw-rw-rw- 1 root root 5, 2 Dec 21 2002 ptmx
drwxr-xr-x 2 root root 192 Mar 11 01:18 pts
crw-r--r-- 1 root root 1, 8 Dec 21 2002 random
crw-rw-rw- 1 root root 5, 0 Mar 10 14:55 tty
crw-r--r-- 1 root root 1, 9 Dec 19 01:07 urandom
crw-rw-rw- 1 root root 1, 5 Dec 21 2002 zero
------------------------------------------------------------------------

Content of /dev/pts:
------------------------------------------------------------------------
crw--w---- 1 root tty 136, 0 Mar 11 01:18 0
crw--w---- 1 root tty 136, 1 Mar 10 23:59 1
crw--w---- 1 root tty 136, 2 Mar 10 23:59 2
crw--w---- 1 root tty 136, 3 Mar 10 15:38 3
crw--w---- 1 root tty 136, 5 Mar 10 16:15 5
crw--w---- 1 root tty 136, 6 Mar 10 16:15 6
------------------------------------------------------------------------

   I have not granted any additional capabilities to the vserver.

   As you can see I have tried everything I could. I just can't figure
out what's the problem. Besides sshd, everything works flawlessly inside
the vserver (apache, syslog, cron, xinetd+vsftpd).

Any help greatly appreciated!

--
CÚdric Veilleux

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