Jailed Service contact IMAPS

[Paul Procacci]

Peter Fraser wrote:
> Hi All
>
> I have two servers, one running apache and squirrelmail in a jail.
> Squirrelmail on this server is trying to contact dovecot running imaps
> on port 993 on another server and failing. When I try from another
> physical machine it works but I would prefer to run this service from
> within a jail.
>
> Can anyone please let me know how to make this work?
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Have you tried to first do a simple (from within the jail):

telnet host 993

Do you get connected?  If not, do you have any firewall rules either on
the host maintaining the jail or the host you are connecting to?  If
not, can you do a tcpdump to see what specificly is happening to those
packets via (on the host again):

tcpdump -i <interface> host <ip of jail> and port 993

Do you see packets both leaving your machine and coming back?  If not,
can you repeat the process above on the host machine maintaining the
jail, but not within the jail itself.  Are the results the same?

The above is a start and should provide enough information as to whether
the problem is specific to the jail or the physical host.

~Paul

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