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Old 10-05-2005, 01:17 PM   #1
TRx
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Keeping user passwords in mail-server migration


Hello everybody,

We're planning a mail server migration in the next days. We are moving our domain from Qmail to a Postfix+Sasl+POP3/IMAP setup. At the moment, i have the updated list of current mail users, but not their passwords, and i need them for an efficient transparent (for the user) migration.
Through qmailadmin console, I can create, delete and modify users, and reset their passwords, but i have no clue on how to fetch their cleartext passwords. I need to use that info in a getmail/fetchmail script to retrieve messages into the new server (before MX dns entry change, since we´re also changing MX location too).

Does anybody know how to accomplish this? How can i get those passwords in cleartext? Then, how should i create the fetchmail script?

Thanks in advance.
 
Old 10-05-2005, 02:52 PM   #2
tbeehler
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I may be completely wrong, but couldn't you just copy over the /etc/shadow /etc/passwd and /etc/groups files to the new system? I'm taking a stab in the dark, so please don't take my word as gospel, but that's how I transfered users from one system to another.

Travis
 
Old 10-06-2005, 03:02 AM   #3
TRx
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Thanks for answering, but since the new authentication method will be SASL (sasldb), system users won't be mail users. I need the cleartext passwords in order to add them to the Cyrus SASL database.
Moreover, our current mail system, which is not managed by us, uses a similar setup (no system users) using qmail and qmail-pop3d.

Any other ideas?
 
Old 10-06-2005, 04:05 AM   #4
phil.d.g
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I would expect that user passwords are stored only as an irreversible hash for security reasons, therefore it would not be possible to retrieve the clear text password.
 
Old 10-06-2005, 10:05 AM   #5
tbeehler
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Quote:
Originally posted by TRx
Thanks for answering, but since the new authentication method will be SASL (sasldb), system users won't be mail users. I need the cleartext passwords in order to add them to the Cyrus SASL database.
Moreover, our current mail system, which is not managed by us, uses a similar setup (no system users) using qmail and qmail-pop3d.

Any other ideas?
Ahh I see. I'm clueless then. I'll search around and see if I can find an answer for you.

Travis
 
  


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