two exchange 2010 servers, two public IPs, and OWA set up
Posted on 2014-04-04
I have two exchange servers in a DAG. Both have CAS, HUB, and MBX roles. The first is set up with a cert, OWA, DNS, and firewall rules allowing mail to flow between us and our smart host, as well as webmail and activesync. I have a second exchange server onto which I am going to install the wildcard cert from the first exchange server and then apply services to it.
I am looking for help / directions on setting up the second exchange server to functionally mirror the first. This is for availability if the first were down.
Can webmail.domain.com point to two different public IP addresses, with each going to a different exchange server in the domain through NAT on the firewall? Or, do I just manually NAT webmail.domain.com's IP address to the second server upon failure of the first (or have the rule ready but disabled and then simply enable it upon the first server failing)?
Should I enable rules for the second exchange server (mirrored from the first, typical exchange services) on the firewall or leave them disabled and enable as needed if the first server goes down?
My goal is to have mail flow and outlook/mobile connectivity on the second server should the first server go down. I have the DAG configured and have witnessed databases failover as they should. I also have a CAS array in place (which I will manually point to the second server if the first goes down). I am just unclear on the DNS, firewall, and OWA set up for the second server.
Thanks a lot for any help.