Paloalto Firewall and VPC peering

Showing results for 
Show  only  | Search instead for 
Did you mean: 

Paloalto Firewall and VPC peering

L2 Linker

i am confuse AWS network firewall and peering section.
As per AWS documents, it said
**AWS Network Firewall cannot be deployed to inspect traffic between VPCs that are peered together; **

this mean AWS network firewall cannot support.


So let me know paloalto can support below scenario ?


i did vpc peering VPC 1 ( VPC2 (

VPC 1 have one private subnet ( behind the PA firewall
VPC 2 have one private subnet ( behind  the PA firewall
I have the one private route table destination next hop is firewall interface in VPC 2.
I add one route to go next hop is peer ID in VPC one private route.
I have the one private route table destination next hop is firewall interface in VPC 1.
I add one route to go next hop is peer ID in VPC 2.

let me know this traffic will pass firewall ?
can we use PA firewall to inspect traffic of private network( and of  two vpc which it is peering?


I don't want to use transit gateway.


L2 Linker
Where are you planning to place the firewalls?
Scott Thornton

Hi @sthornton ,

Sorry for misunderstanding. I want to go VPC1 to VPC2 passthrough VPC3 PA firewall without using transit gateway and VPN.




L2 Linker

This is a very odd setup. Why do you have a firewall in every VPC? By default subnet-2-subnet traffic within a VPC is not going to be inspected by the PA. it would be more practical to use VPC3 as the primary "Security VPC" inspecting traffic passing between VPCs.


With that said, your design CAN work but you would need a RouteTable in every subnet, please see below. I only included VPC1 and VPC3, you can duplicate the configuration for VPC2.VPC_Routing_Example.JPG

Get out there and do great things!

Another thing to keep in mind is that if you added more subnets within the VPCs you would need to consider the PA VM instance size. I believe you need a C4xLarge just to have the proper number of interfaces to place in each subnet. With more than 4 interfaces you would need to go to bigger instance size and it will start getting pricey.

Get out there and do great things!
Like what you see?

Show your appreciation!

Click Like if a post is helpful to you or if you just want to show your support.

Click Accept as Solution to acknowledge that the answer to your question has been provided.

The button appears next to the replies on topics you’ve started. The member who gave the solution and all future visitors to this topic will appreciate it!

These simple actions take just seconds of your time, but go a long way in showing appreciation for community members and the LIVEcommunity as a whole!

The LIVEcommunity thanks you for your participation!