Restricting IMAP (143) port just for Squirrelmail?

Patrick Boutilier boutilpj at
Wed Jun 11 13:40:42 EDT 2003


Why not use iptables to block all port 143 access except the node that 
Squirrelmail is running on?

Mark London wrote:
> I would like to restrict Cyrus to only allow users to use IMAPS, not plain
> IMAP.  However, I was told that would break Squirrelmail, unless I opened
> access to IMAP (port 143) for the node that Squirrelmail was running on.
> But I'm running XINETD on Redhat, and I've read Cyrus doesn't use that.
> I would need another TCP wrapper program (and not sure if even if I installed
> it, whether it's compatible with Xinetd).  Is that true, or is there an easier
> way to do it?  Another thought I had was to simply have IMAP running on a
> non-standard port number, and have configure Squirrelmail use that port
> (is that possible?).  Thanks.  -  Mark

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