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High availability / WAN with 2 public IPs
« on: August 05, 2021, 11:37:49 am »
Hello,
I looked at the setup that is shown here:
https://docs.opnsense.org/_images/900px-Carp_setup_example.png
I wonder if it is possible to have this setup except the front part with three public IPs, only two. I would not replicate the machines only use them that the LAN part will be always reachable even if one machine fails. The high-availability would be done by the DNS.
My question is if I set up the LAN part the way it's described there and for the WAN part each machine has one public ip only, will the NAT work properly when the DNS would change in case of failure?
Thank you for your help.
I looked at the setup that is shown here:
https://docs.opnsense.org/_images/900px-Carp_setup_example.png
I wonder if it is possible to have this setup except the front part with three public IPs, only two. I would not replicate the machines only use them that the LAN part will be always reachable even if one machine fails. The high-availability would be done by the DNS.
My question is if I set up the LAN part the way it's described there and for the WAN part each machine has one public ip only, will the NAT work properly when the DNS would change in case of failure?
Thank you for your help.