Can't ssh from FreeBSD 10 host to FreeBSD 7 jail
Hi,
I'm having a very strange issue with my jails. I have a FreeBSD-7 jail that
worked normally on FreeBSD-9 host, and I could ssh to it.
After moving the host to FreeBSD-10, I can't ssh to 7 jail anymore.
From the host side:
PTY allocation request failed on channel 0
Warning: no access to tty (Bad file descriptor).
Thus no job control in this shell.
From the jail log:
Apr 20 22:25:50 xxx sshd[75065]: error: openpty: Resource temporarily
unavailable
Apr 20 22:25:50 xxx sshd[75065]: error: session_pty_req: session 0 alloc
failed
script within the jail doesn't work as well:
# script /tmp/a
script: openpty: Resource temporarily unavailable
I read a lot of documents about what can cause this situation and nothing
apply to me. One by one:
* Some people had a problem with devfs.rules (jail's /dev/pts/* were
hidden). This is not a case in my jail (I set 0777 permissions for the
debugging purposes and to test devfs.rules):
add path 'pts/*' unhide mode 0777 group wheel
add type tty unhide mode 0777 group wheel
In the jail:
# ls -la dev/pts/
total 1
drwxrwxrwx 2 root wheel 512 Apr 21 01:48 .
dr-xr-xr-x 11 root wheel 512 Apr 21 01:48 ..
crwxrwxrwx 1 user wheel 0x67 Apr 21 02:25 0
crwxrwxrwx 1 user wheel 0xbf Apr 21 02:26 1
crwxrwxrwx 1 user wheel 0xca Apr 21 02:28 2
# ls -la /dev/*tty*
crwxrwxrwx 1 root wheel 0, 69 Apr 20 22:31 /dev/ttyv0
crwxrwxrwx 1 root wheel 0, 70 Apr 20 00:59 /dev/ttyv1
crwxrwxrwx 1 root wheel 0, 71 Apr 20 00:59 /dev/ttyv2
crwxrwxrwx 1 root wheel 0, 72 Apr 20 00:59 /dev/ttyv3
crwxrwxrwx 1 root wheel 0, 73 Apr 20 00:59 /dev/ttyv4
crwxrwxrwx 1 root wheel 0, 74 Apr 20 00:59 /dev/ttyv5
crwxrwxrwx 1 root wheel 0, 75 Apr 20 00:59 /dev/ttyv6
crwxrwxrwx 1 root wheel 0, 76 Apr 20 00:59 /dev/ttyv7
crwxrwxrwx 1 root wheel 0, 77 Apr 20 00:59 /dev/ttyv8
crwxrwxrwx 1 root wheel 0, 78 Apr 20 00:59 /dev/ttyv9
crwxrwxrwx 1 root wheel 0, 79 Apr 20 00:59 /dev/ttyva
crwxrwxrwx 1 root wheel 0, 80 Apr 20 00:59 /dev/ttyvb
* Some people solved the problem my upgrading ssh software inside a jail.
That didn't help in my case. In my jail:
OpenSSH_5.2p1
(the latest available for 7-STABLE)
I can't build the newest 6.6p1 on FreeBSD-7.
So, does anybody know why sshd in the jail can't start a ssh session? I
note that ssh _from_ jail _to_ host works.
MZ
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