02-23-2022 03:43 AM
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 (10.1.1.0/16)and VPC2 ( 10.2.1.0/16).
VPC 1 have one private subnet ( 10.1.2.0/24) behind the PA firewall
VPC 2 have one private subnet ( 10.2.2.0/24) behind the PA firewall
I have the one private route table destination 10.2.2.0/24 next hop is firewall interface in VPC 2.
I add one route to go 10.2.2.0/24 next hop is peer ID in VPC one private route.
I have the one private route table destination 10.1.2.0/24 next hop is firewall interface in VPC 1.
I add one route to go 10.1.2.0/24 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(10.1.2.0/24 and 10.2.2.0/24) of two vpc which it is peering?
I don't want to use transit gateway.
02-24-2022 06:25 PM
Hi @DanaHawkins ,
When i read Doc, all are said need Transitgateway. I want to do VPC3 as security VPC and traffic VPC1 to VPC2 pass through VPC3 for inspection. is it possible without using Transit gateway ?
02-25-2022 06:15 AM
You achieve what you want with VPC peering using a design similar to the picture I posted above. Transit Gateways give you the benefit of Availability Zone redundancy and using BGP for route propagation between the firewalls and AWS. Using VPC peering all route table configurations are manual for both the firewall and AWS.
02-25-2022 09:48 AM
I do not believe this is possible. This would be transitive routing and would require an intermediary to accomplish.
02-25-2022 02:22 PM
The firewall is acting as the intermediary. VPC peer allows for connecting of resources between VPCs. @sthornton You are right that, if there was no firewall, or another intermediary, within the VPC then you would not be able to communicate from VPC1 to VPC2 via VPC3.
02-25-2022 02:31 PM - edited 02-25-2022 02:33 PM
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