Hi,
Let me explain the situation to a better understanding of the problem.
The mailboxes are accessed only internally, but some users (directors,
managers, etc.) want to access mailboxes from their homes through the
Internet.
I was thinking of using any IMAP Proxy solution to solve this problem,
but will now be studying the solutions submitted by Dan and omalleys.
If you have a few more suggestions now that they know a little better
the problem, you might say.
thanks
Sandro
Em 09-09-2011 15:54, Dan White escreveu:
I am not aware of a way to do IP based restrictions with Cyrus SASL.
One way to achieve restrictive access to a mailbox, within Cyrus IMAP, is
to reconfigure /etc/cyrus.conf with two imap entries, one for your
trusted
network, and another for your untrusted network. You could then create a
userdeny_db which selectively denies access for certain users when
connecting from the untrusted network.
For example, given the following entry in /etc/cyrus.conf:
imap cmd="imapd -U 30" listen="imap" prefork=0 maxchild=100
change to:
imap cmd="imapd -U 30" listen="<trusted.ip>:imap" prefork=0
maxchild=100
untrustedimap cmd="imapd -U 30" listen="<untrusted.ip>:imap"
prefork=0 maxchild=100
sudo -u cyrus touch /var/lib/imap/user_deny.db
sudo -u cyrus cyr_dbtool /var/lib/imap/user_deny.db flat set jsmith
"2<ctrl-v><tab>untrustedimap<ctrl-v><tab>Login denied from untrusted
network."
Where:
jsmith is the user who's mailbox you want to restrict access to
<ctrl-v><tab> is entered from a shell, such as bash, which will not
convert a tab to spaces when preceded with a control-v.
See:
http://cyrusimap.org/docs/cyrus-imapd/2.4.10/internal/database-formats.php
for details on the user_deny database structure.
Em 14-09-2011 17:13, omalleys@xxxxxxx escreveu:
The easiest thing is if it is all users, to just firewall off the
untrusted network. I don't think you can use tcp wrappers in this case.
I did get sasl to restrict by using a pam module based on RHOST
restrictions.
But I don't know of any sasl abaility for the restriction, even though
the information is there.
--
Sandro Venezuela
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www.linux2business.com.br
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