I have a Server 2012 R2 Essentials box and have Zimbra running on another internal Centos7 box that I’d like to serve the webmail interface up from.
IIS has the server farm ability which I’ve installed, and have created a server farm consisting of just the centos box.
I’m using any means I can to take webmail.domain.com to redirect it to the centos box, but no matter what I do, it seems to give me a 502 error.
My understanding is that I should be able to serve up the internal centos box without any port forwarding, etc. on the router side. Right now on the router, the ports 80 and 443 are mapped to the Windows server for the /remote access and such.
Am I overlooking something here? I’ve followed a bunch of tutorials on this and none seem to give me any different results.