ONE External IP to MANY Internal IP NAT

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ONE External IP to MANY Internal IP NAT

L2 Linker

I believe I know the answer after looking around.

We have NATs that work fine when it is 1to1.

But what about  1 External IP that represents many Internal Hosts?  We have multiple websites that when you do a lookup in DNS, they all point to a singular public facing IP.  That public facing IP is represented by our ISA.

External                                             Internal -          > -        > -        >

Could this be done by changing addresses (Objects > Addresses) to use FQDN instead of IP?

So the thought there would be:

2 New Objects


Name: (outside) - FQDN:

Name: (inside) - IP Address:

NAT Policy


Src: untrust

Dst: untrust

Src Addr: Any

Src Addr: (outside)

Dst Addr Translation: (inside)

Security Policy


Src: Any

Dst: (outside)



L0 Member

Also you can use the below document for your reference

Understanding PAN-OS NAT

Page 19& 20

Thank you.

I agree with Hulk.

The only way you can do a "1 to many" NAT is via PAT.  You must set up separate ports for each connection.

L7 Applicator

This video tutorial will help you with the DNAT configuration.

Video Link : 1550

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