mdaghrir
Mar 28, 2019Nimbostratus
Issue with servers on the same subnet as pool of SMTP nodes
We built a load balanced virtual server with three SMTP nodes. All the nodes have a virtual server as their gateway in order to keep the original IP of the client.
Everything work perfectly except that other servers in the same subnet as the nodes cannot access SMTP. We attempted to resolve the issue by using an irule that enable SNAT when the client IP is from the same subnet but that resolved the issue only for physical servers, the other virtual servers in Hyper-V were experiencing intermittent connections to the SMTP.
I enabled logging on the irule and I see an entry from the virutal server only when the SMTP connection is successful.
Anyone has an idea on what maybe the issue?