I am wondering if you have a recommended solution to change from one Internet provider to another. Currently we have our old provider coming in on ETH1. Our new provider is connected to ETH2. And our internal network on ETH0.
All of our servers visible to the outside world (with static IPs bound to one adapter) pass through the firewall via NAT. We have multiple servers behind the firewall and multiple Ips assigned to each external port. (I.e. Outside -> firewall -> internal server).
How would you recommend we configure the firewall to take packets coming in from out new IP block, pass it to the internal server, and then have the internal server pass the info back to the firewall then out over the new internet connection. WHILE still allowing the old routings to work until I can migrate the external DNS? I am running into issues with the default gateway since the new block of IPS will not work with the old block since they are through two different providers. I hope that makes sense.
Thank you,
Ben
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