ruby sftp error password reset

I am troubleshooting a ruby script that queries a database, creates a csv, and sftps it to another server. 开发者_运维技巧The server the script is on is a rhel box, running ruby 1.87 I believe.

Here's the code that does the sftping:

Net::SFTP.start(sftp_site, sftp_user, :password => sftp_pswd) do |sftp|       
    sftp.upload!(local_filepath,sftp_dir+filename)  
end 

When executing the script, there is a curious message before it bombs out:

Password Reset

Your password has expired. You are required to change your password to proceed.

This script works on another server, but not this one. A user can sftp from the prompt on this machine. SELinux has been turned off, as it may have had some interference.

Anyway, point being, does anyone have any ideas?

---

It appeared to be a gem issue (though someone in networking may have worked some magic I am unaware of). The production server had older versions of the net/ssh and net/sftp gems. It had version 1.1.1 and version 1.1.2, respectively, and upgrading those gems to a later version fixed the issue.

Thanks for everyone who offered suggestions!

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I would compare the sshd daemon settings (sshd_config), as there's likely an issue in the server that's not working. Perhaps interactive-keyboard authentication is turned on or something like that?