So here is the situation, I have people using our service and they have A records in their DNS which point to an IP address that I cannot move to the new server-cluster.
This was an old set up, and moving the servers was never thought of in advance.
So, I have folks out there with A records and Cname records pointing our servers, the Cnames are not a problem, as I'll just update the DNS on our end to send those to the new cluster IP, but the A's are where I am stuck.
Is there a way with my current Centos LAMP set up to keep the old server alive, accept the IP traffic, then force it to the new IP?
THen that would buy me time to migrate everyone to the new (movable) ip ...