How to set up Excempt NAT in Palo Alto Networks

L2 Linker

How to set up Excempt NAT in Palo Alto Networks



I have a VOIP server in the enternal LAN  related to other site . I need to do a NAT to the traffic in the LAN and not this server .


How can I set up the exempt NAT in Palo Alto Networks?


I add two rules in PAN:


First rule : No NAT for the source ( address IP of this server ) destination (WAN)


Second rule :: PAT NAT : source (any ) destination (WAN) translated to untrust interface.


But always we are blocked to communicate with other servers with those rules.


Please i need your help to solve this problem.


Thank you very much.

Community Team Member

Hi @ra7oub4,


Exempt NAT is done as explained here :


Have you verified your NAT is working correctly ? (in the CLI use 'show session ....' to verify the translation)

Do you have the correct allow policies in place ?


You may also find this main documentation on nat operations helpful.


Hope it helps,


L2 Linker

@kiwiThank you very much for your response .


The issue is solved by add another rule of NAT in the inverse (from wan to lan ) with "None" action in the translation .


Thanks .


Have a nice day

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