Simon Tomlinson
2008-Apr-15 12:06 UTC
ChrootDirectory - SFTP subsystem works fine but SSH hangs
Hi I'm using Centos 5 with Openssh-5.0p1 installed (and OpenSSL 0.98b and Zlib 1.2.3-3). I've managed to get a chroot'd SFTP session using ChrootDirectory and the new built-in SFTP subsystem. However, when I use SSH to connect to the same account the session hangs rather than closing the connection. This happens whether or not I use /sbin/nologin /bin/false or even /bin/sh as the shell. I can chroot to the home directory as root and access the folder files from within a chroot as expected using /bin/sh as shell (for example). I can also login to other accounts on the machine, that do not use chroot, using SFTP and SSH. I guess for an interactive SSH session I may be missing some required system files inside the jail- but I really only need SFTP for this account. Thanks Simon The last ouput from the ssh -vvv command is below:- debug3: packet_send2: adding 48 (len 63 padlen 17 extra_pad 64) debug2: we sent a password packet, wait for reply debug1: Authentication succeeded (password). debug1: channel 0: new [client-session] debug3: ssh_session2_open: channel_new: 0 debug2: channel 0: send open debug1: Entering interactive session. debug2: callback start debug2: client_session2_setup: id 0 debug2: channel 0: request pty-req confirm 0 debug3: tty_make_modes: ospeed 38400 debug3: tty_make_modes: ispeed 38400 debug3: tty_make_modes: 1 3 debug3: tty_make_modes: 2 28 debug3: tty_make_modes: 3 127 debug3: tty_make_modes: 4 21 debug3: tty_make_modes: 5 4 debug3: tty_make_modes: 6 0 debug3: tty_make_modes: 7 0 debug3: tty_make_modes: 8 17 debug3: tty_make_modes: 9 19 debug3: tty_make_modes: 10 26 debug3: tty_make_modes: 12 18 debug3: tty_make_modes: 13 23 debug3: tty_make_modes: 14 22 debug3: tty_make_modes: 18 15 debug3: tty_make_modes: 30 0 debug3: tty_make_modes: 31 0 debug3: tty_make_modes: 32 0 debug3: tty_make_modes: 33 0 debug3: tty_make_modes: 34 0 debug3: tty_make_modes: 35 0 debug3: tty_make_modes: 36 1 debug3: tty_make_modes: 37 0 debug3: tty_make_modes: 38 1 debug3: tty_make_modes: 39 0 debug3: tty_make_modes: 40 0 debug3: tty_make_modes: 41 0 debug3: tty_make_modes: 50 1 debug3: tty_make_modes: 51 1 debug3: tty_make_modes: 52 0 debug3: tty_make_modes: 53 1 debug3: tty_make_modes: 54 1 debug3: tty_make_modes: 55 1 debug3: tty_make_modes: 56 0 debug3: tty_make_modes: 57 0 debug3: tty_make_modes: 58 0 debug3: tty_make_modes: 59 1 debug3: tty_make_modes: 60 1 debug3: tty_make_modes: 61 1 debug3: tty_make_modes: 62 0 debug3: tty_make_modes: 70 1 debug3: tty_make_modes: 71 0 debug3: tty_make_modes: 72 1 debug3: tty_make_modes: 73 0 debug3: tty_make_modes: 74 0 debug3: tty_make_modes: 75 0 debug3: tty_make_modes: 90 1 debug3: tty_make_modes: 91 1 debug3: tty_make_modes: 92 0 debug3: tty_make_modes: 93 0 debug1: Sending environment. debug3: Ignored env HOSTNAME debug3: Ignored env SHELL debug3: Ignored env TERM debug3: Ignored env HISTSIZE debug3: Ignored env SSH_CLIENT debug3: Ignored env KDE_NO_IPV6 debug3: Ignored env SSH_TTY debug3: Ignored env USER debug3: Ignored env JRE_HOME debug3: Ignored env LS_COLORS debug3: Ignored env KDEDIR debug3: Ignored env PATH debug3: Ignored env MAIL debug3: Ignored env PWD debug3: Ignored env INPUTRC debug3: Ignored env JAVA_HOME debug3: Ignored env KDE_IS_PRELINKED debug1: Sending env LANG = en_US.UTF-8 debug2: channel 0: request env confirm 0 debug3: Ignored env SSH_ASKPASS debug3: Ignored env HOME debug3: Ignored env SHLVL debug3: Ignored env LOGNAME debug3: Ignored env CVS_RSH debug3: Ignored env SSH_CONNECTION debug3: Ignored env LESSOPEN debug3: Ignored env G_BROKEN_FILENAMES debug3: Ignored env OLDPWD debug3: Ignored env _ debug2: channel 0: request shell confirm 0 debug2: fd 3 setting TCP_NODELAY debug2: callback done debug2: channel 0: open confirm rwindow 0 rmax 32768 debug2: channel 0: rcvd adjust 2097152 After Cntrl C:- debug2: channel 0: rcvd eof debug2: channel 0: output open -> drain debug2: channel 0: obuf empty debug2: channel 0: close_write debug2: channel 0: output drain -> closed debug1: client_input_channel_req: channel 0 rtype exit-signal reply 0 debug2: channel 0: rcvd close debug2: channel 0: close_read debug2: channel 0: input open -> closed debug3: channel 0: will not send data after close debug2: channel 0: almost dead debug2: channel 0: gc: notify user debug2: channel 0: gc: user detached debug2: channel 0: send close debug2: channel 0: is dead debug2: channel 0: garbage collecting debug1: channel 0: free: client-session, nchannels 1 debug3: channel 0: status: The following connections are open: #0 client-session (t4 r0 i3/0 o3/0 fd -1/-1 cfd -1) debug3: channel 0: close_fds r -1 w -1 e 6 c -1 Connection to mymachine closed. debug1: Transferred: stdin 0, stdout 0, stderr 45 bytes in 121.4 seconds debug1: Bytes per second: stdin 0.0, stdout 0.0, stderr 0.4 debug1: Exit status -1 -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336.
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