Firewall Network (FireNet) Workflow¶
For questions about FireNet, check out FireNet FAQ.
1. Create a Security VPC¶
We recommend that you use the Aviatrix “Useful Tools” to create a VPC for a FireNet deployment.
Select “Aviatrix FireNet VPC” option when creating a security VPC.
| Aviatrix FireNet VPC Public Subnet | Description |
|---|---|
| -Public-gateway-and-firewall-mgmt-AZ-a | A /28 public subnet in AZ a for FireNet gateway and firewall instance management interface. |
| -Public-gateway-and-firewall-mgmt-AZ-b | A /28 public subnet in AZ b for FireNet HA gateway and firewall instance management interface. |
| -Public-FW-ingress-egress-AZ-a | A /28 public subnet in AZ a for firewall instance’s egress interface. |
| -Public-FW-ingress-egress-AZ-b | A /28 public subnet in AZ b for firewall instance’s egress interface. |
2. Subscribe to AWS Marketplace¶
If you have not already done so, follow the AWS Marketplace link to subscribe to the VM-Series.
Do not launch the firewall instance from AWS Console as you launch it in the following steps.
3. Create a Firewall Domain¶
This step creates a Security Domain with a Firewall Domain option.
Go to TGW Orchestrator -> Plan -> Create an AWS Transit Gateway and then a Security Domain by selecting “Aviatrix Firewall Domain”.
For more information, refer to Create a New Security Domain.
4. Launch Aviatrix FireNet Gateway¶
This step leverages the Transit Network workflow to launch one Aviatrix gateway for FireNet deployment.
C5x.large is the minimum Aviatrix gateway instance size for FireNet deployment as it requires 4 interfaces.
If your deployment requires 2-AZ HA, go through Transit Network -> Setup to launch one Aviatrix gateway and enable HA which effectively launches a HA gateway (the second gateway) in a different AZ. If you select public subnet “-Public-gateway-and-firewall-mgmt-AZ-a” for the primary FireNet gateway, you should select public subnet “-Public-gateway-and-firewall-mgmt-AZ-b” for the second AZ FireNet gateway.
Do not check Insane Mode Encryption.
5. Enable Aviatrix FireNet Gateway¶
This step configures the gateway launched in Step 4 for FireNet function. If you have HA enabled, it automatically sets up the HA gateway for FireNet deployment.
Tip
If you do not see any gateways in the drop down menu, refresh the browser to load.
In this step, the Aviatrix Controller creates 3 more Ethernet interfaces with associated subnets on the FireNet gateways.
| FireNet gateway instance interfaces | Inbound Security Group Rule | Description |
|---|---|---|
| eth0 | Allow SSH and HTTPS from Aviatrix Controller | Public interface for communication with Controller |
| eth1 | Allow ALL (Do not change) | Private interface for traffic to/from TGW |
| eth2 | Allow ALL (Do not change) | Private interface for traffic to firewall instances |
| eth3 | Allow ALL (Do not change) | Private interface for traffic to FireNet HA gateway |
Important
Please do not change the security group inbound and outbound rules on eth1, eth2 and eth3 of a FireNet gateway.
If FireNet gateway HA is enabled, the HA gateway shares the same route table as the primary for its eth1 interface.
The new subnets created by the Controller at this steps are listed below.
| Aviatrix FireNet VPC Private Subnet | Description |
|---|---|
| -gw-tgw-egress | for FireNet gateway eth1 to TGW |
| -gw-hagw-tgw-egress | for FireNet HA gateway eth1 |
| -gw-tgw-ingress | for TGW to the ENI of eth1 of FireNet gateway |
| -gw-hagw-tgw-ingress | for TGW to the ENI of eth1 of the FireNet HA gateway |
| -gw-dmz-firewall | for FireNet gateway ethh2 |
| -gw-hagw-dmz-firewall | for FireNet HA gateway eth2 |
| -gw-dmz-exchange | for FireNet gateway eth3 |
| -gw-hagw-dmz-exchange | for FireNet HA gateway eth3 |
6. Attach Aviatrix FireNet gateway to TGW Firewall Domain¶
This step requires you have already created a Security Domain with Firewall attribute enabled.
When this step is completed, you have built the network infrastructure for FireNet deployment. This step may take a few minutes.
This step programs the relative route tables, described as below.
| Aviatrix FireNet VPC route table | key route entry | Description |
|---|---|---|
| -gw-tgw-egress | 0.0.0.0/0 -> tgw | for FireNet gateway and HA gateway eth1 to TGW |
| -gw-tgw-ingress | 0.0.0.0/0 -> eth1 | for TGW to eth1 of FireNet gateway and ha gateway |
| -gw-dmz-firewall | 0.0.0.0/0 -> eth2 | for firewall instance to eth2 of FireNet gateway |
| -gw-hagw-dmz-firewall | 0.0.0.0/0 -> eth2 | for firewall instance to eth2 of FireNet HA gateway |
| -gw-dmz-exchange | 0.0.0.0/0 -> eth1 | for eth3 of FireNet gateway to eth1 of HA gateway |
| -gw-hagw-dmz-exchange | 0.0.0.0/0 -> eth1 | for eth3 of FireNet HA gateway to eth1 of primary gateway |
7a. Launch and Associate Firewall Instance¶
This approach is recommended if this is the first Firewall instance to be attached to the gateway.
This step launches a VM-Series and associates it with one of the FireNet gateways.
The VM-Series and the associated Aviatrix FireNet gateway above must be in the same AZ, and, we recommend that the Management Interface Subnet and Egress (untrust dataplane) Interface Subnet should not be in the same subnet.
7a.1 Launch and Attach¶
| Setting | Value |
|---|---|
| VPC ID | The Security VPC created in Step 1. |
| Gateway Name | The primary FireNet gateway. |
| Firewall Instance Name | The name that will be displayed on AWS Console. |
| Firewall Image | The AWS AMI that you have subscribed in Step 2. |
| Firewall Image Version | VM-Series current supported software versions. |
| Firewall Instance Size | VM-Series instance type. |
| Management Interface Subnet. | Select the subnet whose name contains “gateway and firewall management” |
| Egress Interface Subnet | Select the subnet whose name contains “FW-ingress-egress”. |
| Key Pair Name (Optional) | The .pem file name for SSH access to the firewall instance. |
| Attach (Optional) | By selecting this option, the firewall instance is inserted in the data path to receive packet. If this is the second firewall instance for the same gateway and you have an operational FireNet deployment, you should not select this option as the firewall is not configured yet. You can attach the firewall instance later at Firewall Network -> Advanced page. |
| Advanced (Optional) | Click this selection to allow Palo Alto firewall bootstrap files to be specified. |
| IAM Role | In advanced mode, create an IAM Role on the AWS account that launched the FireNet gateway. Create a policy to attach to the role. The policy is to allow access to “Bootstrap Bucket”. |
| Bootstrap Bucket Name | In advanced mode, specify a bootstrap bucket name where the initial configuration and policy file is stored. |
Note that Palo instance has 3 interfaces as described below.
| Palo Alto VM instance interfaces | Description | Inbound Security Group Rule |
|---|---|---|
| eth0 (on subnet -Public-FW-ingress-egress-AZ-a) | Egress or Untrusted interface | Allow ALL |
| eth1 (on subnet -Public-gateway-and-firewall-mgmt-AZ-a) | Management interface | Allow SSH, HTTPS, ICMP, TCP 3978 |
| eth2 (on subnet -gw-dmz-firewall) | LAN or Trusted interface | Allow ALL (Do not change) |
Note that firewall instance eth2 is on the same subnet as FireNet gateway eth2 interface.
Important
For Panorama managed firewalls, you need to prepare Panorama first and then launch a firewall. Check out Setup Panorama. When a VM-Series instance is launched and connected with Panorama, you need to apply a one time “commit and push” from the Panorama console to sync the firewall instance and Panorama.
Tip
If VM-Series are individually managed and integrated with the Controller, you can still use Bootstrap to save initial configuration time. Export the first firewall’s configuration to bootstrap.xml, create an IAM role and Bootstrap bucket structure as indicated above, then launch additional firewalls with IAM role and the S3 bucket name to save the time of the firewall manual initial configuration.
7a.2 Launch and Associate More¶
Repeat Step 7a.1 to launch the second firewall instance to associate with the HA FireNet gateway. Or repeat this step to launch more firewall instances to associate with the same FireNet gateway.
7a.3 Example Setup for “Allow All” Policy¶
After a firewall instance is launched, wait for 15 minutes for it to come up.
You can follow this example configuration guide to build a simple “Allow All” policy on the firewall instance for a test validation that traffic is indeed being routed to firewall instance.
For implementation details on using Bootstrap to launch and initiate VM-Series, refer to Bootstrap Configuration Example.
7b. Associate an Existing Firewall Instance¶
This step is the alternative step to Step 7a. If you already launched VM-Series from AWS Console, you can still associate it with the FireNet gateway.
If the firewall instance is by a vendor other than Palo Alto Network, for example, Checkpoint or Fortinet, you should launch the firewall instances from the AWS Console and associate them to the Aviatrix FireNet gateway. The Management Interface Subnet may be the same as the Egress Interface Subnet
7c. Launch & Associate Aviatrix FQDN gateway¶
If you perform 7a or 7b, then you must be using a third party firewall instance. Skip this step.
This option is to deploy Aviatrix FQDN gateway in a FireNet environment for a centralized scale out egress whitelist solution, as shown below.
| Setting | Value |
|---|---|
| VPC ID | The Security VPC created in Step 1. |
| Gateway Name | The primary FireNet gateway. |
| FQDN Gateway Subnet | The public subnet on which Aviatrix FQDN gateway will be launched. |
| FQDN Gateway Size | The Aviatrix FQDN gateway instance size, starting from t2.micro. |
| FQDN Gateway Name | The Aviatrix FQDN gateway name. Note you cannot change the name once the gateway instance is launched. |
| Attach | Attach this FQDN gateway to the primary FireNet gateway. |
8. Specify Security Domain for Firewall Inspection¶
The method to specify a Spoke VPC that needs inspection is to define a connection policy of the Security Domain where the Spoke VPC is a member to the Firewall Domain.
For example, if you wish to inspect traffic between on-prem to VPC, connect Aviatrix Edge Domain to the Firewall Domain. This means on-prem traffic to any Spoke VPC is routed to the firewall first and then it is forwarded to the destination Spoke VPC. Conversely, any Spoke VPC traffic destined to on-prem is routed to the firewall first and then forwarded to on-prem.