Can we create a static Public to Private NAT Translation from a public address on [ASA 5540 B] to a host on [Layer 3 Core Switch with hosts A]?
Let's say the outside IP is 22.214.171.124, the inside interface is 172.20.20.1/24 and the MPLS host is 192.168.20.20.
The desired translation is:
static (inside,outside) 126.96.36.199 192.168.20.20 netmask 255.255.255.255 dns
We can ping the host in question from the inside interface of [ASA 5540 B].
Currently, I'd imagine this not working because ultimately one of the routers would see a request from 192.168.20.20 and continue routing it back to segment A, and it would never get back to segment B. There's a couple of ways around this, and all involve using a private IP on host B for the translation, but I don't want to create a bunch of NAT statements across our MPLS network.
Again, I don't think this can work, but I'm hoping again hope that there's a way.
Pretty sure this won't work, but... ASA 5540 static NAT public
The answer to your question is yes, you can NAT host A on ASA 5540 B.
However, how are you routing the traffic from host A. What is the default gateway for host A? If default gateway for host A is the MPLS Router A, and it routes towards MPLS Router B and so on towards Internet B, then yes, it would all work.
However, if default gateway of host A is ASA 5510A, then you might need to change the default gateway to MPLS Router A, and if MPLS Router A default route is somewhere else but MPLS Router B, then you might want to do some PBR for hostA so it is being routed towards ASA5540B.
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