I have installed a Windows 2008 2-node cluster for SMTP purposes.
Cluster1 is the clustered address/hostname. All three are registered in DNS.
Applications on our network will be configured to use an SMTP server of: Cluster1 (or 192.168.1.3 if we need to specify an IP).
We have some ports of the network that are not accessible due a firewall being placed between that subnet and the rest. So, for example, Server1 in a restricted subnet needs to send SMTP mail. We'll need to open port 25, but to what destination, 192.168.1.1 and 192.168.1.2, or those AND 192.168.1.3, or just 192.168.1.3 only?
Thanks in advance.