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Network Security Secure-Shell
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Re: Allow password auth for one user with sftp?

Subject: Re: Allow password auth for one user with sftp?
Date: Mon, 22 Jan 2007 17:09:19 +1100
martin f krafft wrote:
also sprach Adrian von Bidder <avbidder@fortytwo.ch> [2007.01.11.1855 +0100]:
Anybody has an idea if and how this is possible?  The obvious but
ugly solution would be to run a second sshd on a different port,
but I'd rather avoid that.

It'll be possible if and only if SSH differentiates between authentication and authorisation/session. If it does, you can limit authentication with PAM via pam_file to one user, knowing that publickey auth will be handled by sshd. All users, however, need to be authenticated against the PAM session component.

I missed the context here (the reply seems to have been cc'ed to secureshell but the original request wasn't).


OpenSSH 4.4 added a "Match" directive to sshd_config that allows per-X overriding of some configuration directives. Authentications aren't supported yet but I have a patch that adds it which hopefully will be in the next release. This would allow you to do something like the following for the user "sftpuser":

PasswordAuthentication no
Match User sftpuser
        PasswordAuthentication yes

If you're interested I can supply a copy of the patch that adds auth support (against 4.5p1).

--
Darren Tucker (dtucker at zip.com.au)
GPG key 8FF4FA69 / D9A3 86E9 7EEE AF4B B2D4  37C9 C982 80C7 8FF4 FA69
    Good judgement comes with experience. Unfortunately, the experience
usually comes from bad judgement.

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