Bug 49432 - scp doesn't interoperate with SSH(R) Secure Shell(TM) server 2.4.0
Summary: scp doesn't interoperate with SSH(R) Secure Shell(TM) server 2.4.0
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: openssh   
(Show other bugs)
Version: 7.1
Hardware: i686
OS: Linux
Target Milestone: ---
Assignee: Tomas Mraz
QA Contact:
Keywords: FutureFeature
Depends On:
TreeView+ depends on / blocked
Reported: 2001-07-19 15:25 UTC by John Dalbec
Modified: 2007-04-18 16:34 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Enhancement
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2005-02-09 09:32:10 UTC
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description John Dalbec 2001-07-19 15:25:55 UTC
From Bugzilla Helper:
User-Agent: Mozilla/4.77 [en] (Windows NT 5.0; U)

Description of problem:
When I scp from an openssh client to the SSH(R) Secure Shell(TM) 2.4.0 server, I get the message
scp: warning: Executing scp1 compatibility.
scp: FATAL: Executing ssh1 in compatibility mode failed (Check that scp1 is in your PATH).
This is bogus since SSH(R) Secure Shell(TM) 2.4.0 does not support the SSH 1 protocol.
The SSH(R) Secure Shell(TM) 2.4.0 scp client interoperates with the openssh server, so I can work around this.

How reproducible:

Steps to Reproduce:
1. Install SSH(R) Secure Shell(TM) on the server.
2. Try to scp a file to/from the server.
3. The above messages appear.

Actual Results:  scp dies and the file is not copied.

Expected Results:  the file should be copied.

Additional info:

Comment 1 Olivier Baudron 2001-07-19 23:36:40 UTC
Can you post your configuration files $HOME/.ssh/config and /etc/ssh/ssh_config?
Also, what messages do you see with the -v option on the client side?

Comment 2 John Dalbec 2001-07-20 12:16:36 UTC
No ~/.ssh/config file.
After stripping blank lines and comments, /etc/ssh/ssh_config is:
---cut here---
Host *
        ForwardX11 yes
        Protocol 2,1
---cut here---
$ scp -v ysul.ysu.edu:perl.tar.gz . # Linux on S/390 host
Executing: program /usr/bin/ssh host ysul.ysu.edu, user (unspecified), command scp -v -f perl.tar.gz
jpdalbec@ysul.ysu.edu's password: 
scp: warning: Development-time debugging not compiled in.
scp: warning: To enable, configure with --enable-debug and recompile.
scp: warning: Executing scp1 compatibility.
scp: FATAL: Executing ssh1 in compatibility mode failed (Check that scp1 is in your PATH).
$ scp -v unix1.cc.ysu.edu:test.c . # AIX host
Executing: program /usr/bin/ssh host unix1.cc.ysu.edu, user (unspecified), command scp -v -f test.c
jpdalbec@unix1.cc.ysu.edu's password: 
scp: warning: Executing scp1 compatibility.
scp: FATAL: Executing ssh1 in compatibility mode failed (Check that scp1 is in your PATH).

Comment 3 Olivier Baudron 2001-07-20 14:28:11 UTC
Well, I'm stuck!
Would you try to recompile openssh release:

./configure --sysconfdir=/etc/ssh --with-pam --enable-debug

This gives lots of debugging messages with ./scp -v
So, we can see where this incompatibility com from.

Comment 4 John Dalbec 2001-07-20 18:58:21 UTC
My mistake, the messages (prefixed with "scp:") are coming from the remote (SSH(R) Secure Shell(TM)) "scp" process.  It doesn't like the "-f" option on 
the "scp" command.  What is that supposed to do?  It's not a documented option to openssh's "scp" command.  Did you mean to pass it to the "ssh" 
command instead?

Comment 5 Olivier Baudron 2001-07-20 20:24:36 UTC
Indeed, on my linux box I don't have this -f options added to the scp command.
But, I don't use redhat rpm, I have recompiled the openssh release.
Maybe, you should try it?

Comment 6 Pekka Savola 2001-07-22 19:03:48 UTC
Ok, a few issues that might help:
 1) is scp1 in your PATH in the server your connecting to (SSH Communications daemon)?
 2) if 'scp' does not exist there, but only 'scp2' and 'scp1', try creating a symlink.

Also note that scp2 of SSH comm. uses sftp as its transport IIRC, and might be incompatible.
Did you try: scp -o Protocol=1 .. from your openssh box?

Comment 7 John Dalbec 2001-07-23 13:19:03 UTC
No, I have installed only SSH(R) Secure Shell(TM) 2.4.0.  I have no "1" programs anywhere on the system.  Anyway, SSH 1 is insecure.
I tried linking sftp to "scp1", but the options are completely different; for example, sftp takes a hostname instead of a filename.
Hm, the openssh sftp client seems to work now.  I was using the same client from another distro with SSH(R) Secure Shell(TM) 2.2.0 server and it didn't 
work then.

Comment 8 Pekka Savola 2001-07-23 13:45:15 UTC
AFAIK, you can't make SSH.com 'scp2' and OpenSSH 'scp' interoperate.  If it's
possible nonetheless, a symlink should do.

Comment 9 Darren Tucker 2004-07-01 05:29:15 UTC
This is because ssh.com's v2 "scp" program actually speaks the sftp
Either use OpenSSH's sftp program, or install an "scp1" on your ssh2
host (which you'll need to get from either OpenSSH or ssh.com's v1

See also: http://www.snailbook.com/faq/scp-ossh-to-ssh2.auto.html

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