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Title: IP Changed on internal host (Exchange) Post by: patrickdoman on Wednesday 06 August 2014, 03:02:00 pm The IP address that my exchange server was using has altered to another external IP address from a different device.
mail.companyname.com pings to the correct IP address, but on the Endian I am not able to figure out how to get the system to show up as another IP address than it is using right now. I have a main uplink using 23.23.23.23 I have a WAN2 uplink using 72.1.1.1 Both interfaces are up. When I rebooted the Endian this morning to troubleshoot an issue on the firewall, I saw that the external IP of the Exchange server changed from 72.1.1.1 to 23.23.23.23. Because of this IP change, mail flow now is not coming in from outside. I think port 25 traffic is potentially being blocked. Outbound mail flow is fine. No issues there. Inbound just isn't working. When I telnet to the 72.1.1.1 port 25, eventually I get a connected message. But if I do a what is my ip lookup, th ehost shows its using 23.23.23.23 and I need it to be seen as 72.1.1.1. Where can I look to fix this? I am not sure what happened during reboot. |