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SFTP - UNIX to Windows without keys

 
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# 1  
Old 12-19-2011
SFTP - UNIX to Windows without keys
When I try to SFTP from our UNIX box to an outside vendor using passwords - no keys, I am immediately get disconnected.
We have the FIREWALL open because I get prompted for the password.

Here's the error:

Code:
sftp userid@sftp.test.com
Connecting to sftp.test.com...
userid@sftp.test.com's password:
Received disconnect from 123.12.12.12: 2:
Connection closed

I can SFTP to the ip address from a PC or a Linux box outside the firewall with no problem.

Why do I get disconnected right away?

Any help is greatly appreciated - thanks!
Barbara
Last edited by zxmaus; 12-19-2011 at 09:40 PM..
# 2  
Old 12-19-2011
If it works outside the firewall but not inside the firewall, the problem's probably the firewall.

Trying sftp -v or sftp -v -v may show more information.

Keys vs no keys shouldn't matter.
# 3  
Old 12-19-2011
We've tried that and also
Code:
sftp -vvv -o PreferredAuthentications=password

; however we still get disconnected. Here's the tail end of the log:

Code:
debug1: Authentication succeeded (password).
debug2: fd 5 setting O_NONBLOCK
debug3: fd 6 is O_NONBLOCK
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug2: callback start
debug2: client_session2_setup: id 0
debug1: Sending subsystem: sftp
debug2: channel 0: request subsystem confirm 1
debug2: fd 4 setting TCP_NODELAY
debug2: callback done
debug2: channel 0: open confirm rwindow 300000 rmax 30000
Received disconnect from 123.12.12.12: 2:
Connection closed

Thanks,
Barbara
Last edited by zxmaus; 12-19-2011 at 09:40 PM..
# 4  
Old 12-19-2011
An idea:
Check that the remote computer can do a reverse DNS lookup of your unix computer and get a correct result.

Please state the Operating System and version all computers involved (and that includes any Firewalls).
The original post mentions M$ Windows. What version or M$ Windows?

Another idea:
Have you checked the target IP adress? (In case there is a NAT translation from your LAN to the www).
Last edited by methyl; 12-19-2011 at 10:32 PM.. Reason: realised that O/P mentioned Windows
# 5  
Old 02-10-2012
SFTP -no keys-eliminate password prompt-use autosys job
When we updated SSH to Version 5.6 on our UNIX machine; we were successful in keeping an open session to the machine.

Now, I have the problem of writing a script to do this SFTP via an autosys job. It always asks for password; which I want to include in the script.

After reading a lot of posts = it looks like this can't be done.

Does anyone have a solution - thanks in advance for your help!
# 6  
Old 02-10-2012
ssh is specifically designed to prevent you from injecting plaintext passwords into it for security reasons; for one, this is very hard to do safely. For another, this is precisely what hackers need to bruteforce other machines.

If you insist it may be possible using a third-party brute-forcing utility like expect but it will be complicated and ugly.

The true solution is to use keys. That's what they're there for.
 
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