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Old 03-23-2006, 09:01 AM   #1
jwholey
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sftp - Protocol major versions differ


I'm attempting to sftp from a RHEL AS3 server to an AIX 4.3 server and am getting the following message:

"Protocol major versions differ: 2 vs. 1
Couldn't read packet: Connection reset by peer"

However, my protocol versions appear to be the same. Please view the output of ssh -V:

RHEL: OpenSSH_3.6.1p2, SSH protocols 1.5/2.0, OpenSSL 0x0090701f

AIX: OpenSSH_3.0.2p1, SSH protocols 1.5/2.0, OpenSSL 0x0090603f

Any ideas why this would be happening? thx.
 
Old 03-23-2006, 09:06 AM   #2
timmeke
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In the /etc/sshd/sshd.conf file on the AIX machine, does it say that Protocol 2 is supported?
 
Old 03-24-2006, 07:40 AM   #3
jwholey
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Yes. It does.
 
Old 03-24-2006, 09:47 AM   #4
timmeke
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Does the SSH client support SSH2 too?
 
Old 03-25-2006, 04:06 AM   #5
jwholey
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Yes it does.
 
Old 03-27-2006, 01:01 AM   #6
timmeke
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Then the conclusion seems to be that the 2 different versions of OpenSSH can't talk to each other properly.
Can you establish other kinds of connections (ie ftp, http, etc)?
If you can't, this can indicate a failure for instance in the wiring.

In any case, you might want to consider upgrading to the latest version of OpenSSH.
There are quite some security holes patched since your versions were released:
http://www.openssh.com/security.html
 
  


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