[ale] OpenSSH Client & Commercial SSH2 Server Incompatibility

[Gabriel Donnell]

Hello ALE,

I have Red Hat 7.2 systems with the OpenSSH client that fail to authenticate to
Red Hat 6.2 systems with the commercial SSH2 server.  I used the ssh-keygen2
application on one of the SSH2 servers to generate the public & private DSA
keys and copied them to the account on the OpenSSH & SSH2 client systems.

The authentication works with Red Hat 6.2 SSH2 clients connecting to Red Hat
6.2 SSH2 servers that DO require public & private keys.  It also works with
Red Hat 7.2 OpenSSH clients connecting to Red Hat 6.2 SSH2 servers that DO NOT
require public & private keys.

However, it fails with Red Hat 7.2 OpenSSH clients connecting to Red Hat 6.2
SSH2 servers that DO require public & private keys.  It keeps asking for the
passphrase even after it is entered correctly.  When a blank passpphrase is
entered, it asks for the remote account password.  Even though the password is
entered correctly, it fails authentication due to the public key.

Below is the terminal output from one of the Red Hat 7.2 OpenSSH clients:
--------------------------------------------------------------------------------
openssh at redhat-7.2[1/1]$ ssh -2 -i ~/.ssh2/openssh at redhat-7.2.domain.com
ssh2 at redhat-6.2.domain.com
Enter passphrase for key '/home/openssh/.ssh2/openssh at redhat-7.2.domain.com': 
Enter passphrase for key '/home/openssh/.ssh2/openssh at redhat-7.2.domain.com': 
Enter passphrase for key '/home/openssh/.ssh2/openssh at redhat-7.2.domain.com': 
ssh2 at redhat-6.2.domain.com's password: 
Authenticated with partial success.
Permission denied (publickey).
openssh at redhat-7.2[2/2]$
--------------------------------------------------------------------------------

Please let me know if there are problems and/or solutions associated with
connecting OpenSSH clients to SSH2 servers that require public & private keys.

Thanks,
Gabriel (Gabe) Donnell

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