The internal server may not need a public IP as it could be access from By Internet users through NAT.
These are the steps to follow:
1. assigned a public IP to the public load balancer that front-end the VM-Series FWs
2. add a NAT policy to all the FWs behind the public LB. The policy, I call it "Inbound DNAT". In the original packet section use Untrust in the src and dst zones, and add the IP address of the eth1 FW interface. In the Translater packet section use Dynamic IP and Port as Translation Type, Interface Address as Address Type and ethernet1/2 as Interface (leave IP address as None). Select the Destination Address Translatation and type either the IP address load balancer that front ends the internal server farm or the IP address of the internal server (private IP - make sure is static so if you reboot it does not change)
You also need to configure routing on the VM-Series and routing entry in the UDR to direct traffic in the internal server subnet through the VM-Series.
Does it require to configure NAT Inbound rule on Azure ?
Consider the scenario as mentioned below
Public IP (Load balancer ) Front end- 22.214.171.124
Unrust Interface - 10.0.1.4
Trust Interface - 10.0.2.4
Internal server -10.0.5.4
Port to be exposed - RDP and 443
Could you help me with the NAT rule on palo alto firewall.
Hi Amaresh, there are 2 ways you can do this:
1. Create a NAT policy that doesn't filter for inbound port so that you can account for both RDP (3389) and 443 coming into the same host. Then rely on your security policy to allow only the applications/ports you wish.
2. Create 2 separate NAT policies, one that filters specifically for port 3389 and one that filters for 443.
I've provided an example below of #1
You will also need a corresponding Security Policy with the source zone of Untrust and the Destination zone of Trust, for the appropriate applictions that you want to allow access to. The Destination IP would be 10.0.1.4 in this case. You can leave the destionation IP set to any if you prefer to see the destination IP show up in the traffic log, and adjust the Security Policy after the fact.
Hi Amarash, have you created all of the necessary load balancing rules, probes, etc.? It might be worth contacting your Palo Alto Networks sales team who may be able to assist and get you up and running.
Front Side IP Address
Load Balancing Rules
Corresponding port open on the firewall or wherever your health probe is going to
Corresponding security rules to allow the health probe to pass
The correct routes on your VM Series to account for the health probe(s)
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