FTD - FlexConfig nat external address to another external address

[fidelixoy]

Hello.

We have MPLS where are hundreds if not thousands devices. Problem is when our Internet Operator changed, these devices cannot connect to some servies, like old operator DNS and SMTP servers. Reconfiguring all of these devices would be very difficult and slow.

I tried to make a simple NAT rule that would redirect all old service addresses to new ones, but it does not seem to work with FTD basic NAT. Obviously the solution would be FlexConfig, but I don't know how to do this kind of rule with this. Could someone show simple example, how I can force a query from intranet go to another external server. Example devices tryes to connect to address 1.2.3.4, but I want to connection is changed to address 4.3.2.1

[paul driver]

Hello

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@fidelixoy wrote:

Example devices tryes to connect to address 1.2.3.4, but I want to connection is changed to address 4.3.2.1

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 1.2.3.4 & 4.3.2.1 are they reachable on a separate interfaces of your rtr you have/or want to have nat ruining?

[fidelixoy]

Hi.

Booth addresses are on external interface. (In this example 1.2.3.4 is now inaccessible by external internet operator).

Connections to this server comes from internal interface.