Thursday, March 7, 2019

NAT Question - One to multiple inbound

Would there be any issue if you have an external IP translate to multiple inside hosts? (for example a published website or mail server) We typically do static NAT for our systems we publish outside of the firewall, but we have a request to have a new server that is built with the same public address NATed as the old server. They want this turned on before the old server is turned off meaning they want this public address to translate to two different internal IPs.

Is this possible or would it break something? I know for outbound traffic you can use PAT, but I am unsure how something ingress would understand which host to go to.



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