John Summerfield wrote:
Tim Alberts wrote:
A little background first..I run 2 servers, mail and web. The mail
server is down for hardware problems. I'm running both email and web
on one server. The web server has 3 network interfaces 1 for public
email, 1 for public web, and 1 for private network. I use 3 cards
because the router I connect to the internet won't recognize multiple
IP's for a single hardware MAC.
The problem is, that my email messages seem to be going out the web
network interface. This is typically not a problem except for the
reverse DNS lookup fails which at least one domain (Comcast.Net)
rejects.
My question therefore is, how can I route my sendmail traffic to go
out the correct ethernet interface? I'm sure I'll need to do the
same for the web traffic so web site spoofing alarms are triggered.
I have told sendmail to listen to the correct interfaces, but that
apparently doesn't mean only write to those interfaces. I don't see
how to control this by setting up my routes and I can only really
think of ways to block it in IPtables, not re-route it.
The problem arises in part because of the complexity of the network.
I run several servers (smtp, ssh, www, imap), and they all work
perfectly well from a single IP address, so I wonder, Why do you need
so many?
Please refer to the several times I've explained, the router provided by
my ISP is not accepting virtual IP addresses.
In some cases, the services are served from different boxes; ssh to
where I work and it terminates on my desktop, smtp on another goes to
one server or another, depending on where you are. It's how I receive
email to this address from some locations, but _you_ can't email to it.
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