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Palo Alto VM-Series Firewall Configuration in Azure

ByJon

Jan 15, 2022

There are some configuration on Azure network to get your Palo Alto firewall working well for the passing through traffic. Especially for ping traffic, by default, you wont be able to ping Internet ip through Palo Alto firewall.

In this post, it will give you some small tricks to get ping working for local interfaces and internet.

Topology

Web Gui Overview

ACC Tab:  The default ACC view will show you the network, threat, blocked and tunnel activity in four separate tabs for the past hour. The time frame and each tab can be customized to display the relevant application, threat, and user activity depending upon the user role.

The Monitor tab is where you can perform log analysis and generate reports on all of the traffic flowing through the VM-Series. Logs are stored on the box and can also be forwarded to either Panorama, our centralized management solution, or forwarded to a syslog server for analysis and reporting by 3rd party offerings.
The Policies tab is where you will define all of your policies. The default view will be your security policies, all of which can be based on the application, the content within, and the user. Click Reports to see the various pre-defined reports you can use.
The Objects, Network, and Device tabs provide you with the various management capabilities. The Objects tab allows you to manage the building blocks for creating policies such as address objects, custom applications, and security profiles. The network tab allows you to create and manage interfaces, security zones, VLANs and other elements that enable connectivity. The device tab allows you to manage high availability, users, software and content updates.
  • The Objects tab allows you to manage the building blocks for creating policies such as address objects, custom applications, and security profiles.
  • The Network tab allows you to create and manage interfaces, security zones, VLANs and other elements that enable connectivity.
  • The Device tab is where configuration items like DNS, service routes, etc.  are managed. The device tab also allows you to manage high availability, users, software and content updates.

Enable Ping on Interfaces

To allow Ping and other management traffic, configure an Interface Management Profile and apply it to the interface.

Steps

    1. Go to Network > Network Profiles > Interface Mgmt
    2. Create a profile allowing ping:

Capture.PNG

    1. Go to Network > Interfaces and assign the profile, created above, to the interface under the Advanced tab:
      Capture.PNG
    2. Commit the changesFrom CLI: 
      > configure
# set network profiles interface-management-profile mgmt ping yes
# set network interface ethernet ethernet1/3 layer3 interface-management-profile mgmt

Add a Route Table and Route

By default all Azure subnet traffic will go to Azure default gateway for that subnet, which is .1 ip address.

If we will need to re-route traffic to our virtual appliance, such as our Palo Alto firewall, we will need to create a separate route table and add a new route in it.

Create a new route to reroute all default traffic to Palo Alto firewall interface which is 10.0.2.4
Associate your subnet which will use this  routing table.

Add Public IP Address To Untrusted Interface

By default Azure vnet will not allow ping or tracert packet going through well.

To make ping working through Azure network and Palo Alto firewall, you will have to assign a public ip to untrusted interface on Palo Alto

Associate this new public ip with Palo Alto’s untrusted interface, which is eth1:

Now you should be able to use Ping to Internet through Palo Alto firewall.

Updates

After did Check Now from Device -> Dynamic Updates page, you will be able to see some updates available for downloading.  You can install them after downloaded.

Even the VM firewall is not able to connect to Palo Alto networks update server, you will be still able to proceed with installation without valid the content.

By Jon

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