[Dovecot] Dovecot's as ip/user based login filter?

[Timo Sirainen]

On Mon, 2006-04-10 at 11:44 +0300, Sysadmin wrote:
> Hello.
> 
> I'm facing a problem, I need to give access to internal mailserer for some people
> only, but can't figure out how to do it. Opening the 993 port for whole word gives
> access to everyone who have account.
> 
> Can Dovecot act as login filter or etc for that purpose. Or does anybody have idea
> how to do it?

Dovecot 1.0beta4 and newer support "allow_nets" field userdb. So with
SQL you'd do eg.:

select uid, gid, home, allow_nets from users where username = '%u'

where allow_nets contains something like: 192.168.0.0/24,10.0.0.0/8

Or the same is possible with passwd-file, etc.

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