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The two public cloud platforms that the VM-Series plugin supports are:

Azure

Amazon Web Services (AWS)

A public cloud platform is a cloud computing service that provides infrastructure as a service (IaaS), platform as a service (PaaS), or software as a service (SaaS) to customers over the internet. A public cloud platform requires network security that can protect the traffic between different cloud services or regions from cyberattacks and enforce granular security policies based on application, user, content, and threat information. VM-Series firewall is a virtualized version of the Palo Alto Networks next-generation firewall that can be deployed on various cloud or virtualization platforms. VM-Series plugin is a software component that extends the functionality of the VM-Series firewall and Panorama to support specific features and capabilities of different cloud platforms. Azure and AWS are two public cloud platforms that the VM-Series plugin supports. Azure is a public cloud platform that provides a range of cloud services, such as compute, storage, networking, databases, analytics, artificial intelligence, and more. AWS is a public cloud platform that provides a range of cloud services, such as EC2, S3, VPC, Lambda, and more. The VM-Series plugin supports Azure and AWS by enabling features such as bootstrapping, dynamic address groups, scaling, load balancing, high availability, monitoring, logging, and automation for VM-Series firewalls and Panorama on these platforms. IBM Cloud and OCI are not public cloud platforms that the VM-Series plugin supports, but they are related platforms that can be used for other purposes. Reference: [Palo Alto Networks Certified Software Firewall Engineer (PCSFE)], [VM-Series Plugin Overview], [VM-Series Plugin for Azure], [VM-Series Plugin for AWS], [What is Azure?], [What is AWS?]

The two statements that apply to the VM-Series plugin are:

It can be upgraded independently of PAN-OS.

It enables management of cloud-specific interactions between VM-Series firewalls and supported public cloud platforms.

The VM-Series plugin is a software component that extends the functionality of the PAN-OS operating system to support cloud-specific features and APIs. The VM-Series plugin can be upgraded independently of PAN-OS to provide faster access to new cloud capabilities and integrations. The VM-Series plugin enables management of cloud-specific interactions between VM-Series firewalls and supported public cloud platforms, such as AWS, Azure, GCP, Alibaba Cloud, and Oracle Cloud. These interactions include bootstrapping, licensing, scaling, high availability, load balancing, and tagging. The VM-Series plugin cannot manage capabilities common to both VM-Series firewalls and hardware firewalls, as those are handled by PAN-OS. The VM-Series plugin cannot manage Panorama plugins, as those are separate software components that extend the functionality of the Panorama management server to support cloud-specific features and APIs. Reference:Palo Alto Networks Certified Software Firewall Engineer (PCSFE), [VM-Series Plugin Overview], [VM-Series Plugin Release Notes]

CN-Series firewall is the Palo Alto Networks firewall that provides network security when deploying a microservices-based application. A microservices-based application is an application that consists of multiple independent and loosely coupled services that communicate with each other through APIs. A microservices-based application requires network security that can protect the inter-service communication from cyberattacks and enforce granular security policies based on application or workload characteristics. CN-Series firewall is a containerized firewall that integrates with Kubernetes and provides visibility and control over container traffic. CN-Series firewall can provide network security when deploying a microservices-based application by inspecting and enforcing security policies on traffic between containers within a pod, across pods, or across namespaces in a Kubernetes cluster. PA-Series, VM-Series, and HA-Series are not Palo Alto Networks firewalls that provide network security when deploying a microservices-based application, but they are related solutions that can be deployed on different platforms or environments. Reference:Palo Alto Networks Certified Software Firewall Engineer (PCSFE), [CN-Series Datasheet], [CN-Series Concepts], [What is a Microservices Architecture?]

CN-Series firewall can protect communications between Dockers by firewalling. Dockers are software platforms that provide containerization technology for packaging and running applications in isolated environments. Communications between Dockers are network connections between containers within a Docker host or across Docker hosts. CN-Series firewall is a containerized firewall that integrates with Kubernetes and provides visibility and control over container traffic. CN-Series firewall can protect communications between Dockers by firewalling, which is the process of inspecting and enforcing security policies on network traffic based on application, user, content, and threat information. CN-Series firewall can also leverage threat prevention technologies, such as antivirus, anti-spyware, vulnerability protection, URL filtering, file blocking, data filtering, and WildFire analysis, to block any malicious content or activity in the communications between Dockers. CN-Series firewall does not protect communications between Dockers by runtime security, vulnerability management, or data loss prevention (DLP), as those are not features or functions of CN-Series firewall. Reference: [Palo Alto Networks Certified Software Firewall Engineer (PCSFE)], [CN-Series Datasheet], [CN-Series Concepts], [What is Docker?]