Tim,
I think your problem is different from what you've read on the other
forums... specifically, I suspect that they wanted to have the system
attached to both IP addresses (both ISPs), but have QMail use only
one.... THAT requires a patch.
What you're proposing is that you have 2 IP addresses (whether on a pair
(or more) of NICs, or shared on one NIC won't matter) and that you let
whatever internal load balancing is in effect control the outbound
message flow. This is the DEFAULT behavior of QMail, so no patches are
necessary.
One brief caveat -- if you're using SPF, make sure BOTH of your public
IP addresses are valid -- and make sure BOTH of your public IP addresses
have appropriate reverse-DNS entries.
Good Luck!
Dan
IT4SOHO
On 7/14/2011 11:31 AM, Tim Pleiman wrote:
I'm in the process of upgrading a system with load balacing/failover from
2 different ISPs on a single box, e.g.:
http://www.xenocafe.com/tutorials/linux/redhat/bind_multiple_ip_addresses_to_single_nic/index.php
What I wish to be able to do is have qmail-smtpd listening on both IP
addresses for inbound mail traffic at all times. Then have qmail-remote
select the first available address to send outbound traffic--e.g. either
IP that is available, so that if one goes down, qmail-remote will
automatically determine to send on the other.
Is this possible with the current qmailtoaster distribution? I've seen
posts in other forums with similar questions, some indicate that a patch
is required or to have the services bound to specific IPs. None of the
information I can find gives information specific as to what I'm trying to
accomplish.
Many thanks in advance!
Tim
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