Palo Alto Networks Security Fundamentals

This blog is intended for providing the Fundamentals of Network Security in Palo Alto. Here you will comprehend the concepts like what is network security, types of threats prevented by network security, working of network security,  and essential components of Network Security.  For quick review, click here to refer to Palo Alto Tutorial to comprehend the concepts like what is Palo Alto Networks, its categories and firewall configurations. Now let’s go through the concepts in detail.

Palo Alto Understanding Network Security

Two or many computing systems are joined by physical or/and wireless connections to form a network. Client-server or peer-to-peer architecture is widely used in networks, along with a variety of protocols for networking to allow connected computers to collaborate with one another.

A subset of networking is network security. It entails protecting the network infrastructures from core to network perimeter’s edge. Network security is often handled by the administrator of a network and entails putting in place IT security policies and also deploying network hardware and software to protect the network:

  • External cyber attacks must be secured against the network, infrastructure, and traffic.
  • Restrict access to any network-accessible IT systems and assets.
  • Ensure that permissible users have sufficient accessibility to these networks’ IT resources and assets in order to execute their jobs successfully.

Palo Alto: What Kinds of Threats Are Prevented by Network Security?

The following are a few of the most prevalent computer system and network threats:

  • Spyware
  • Malware
  • DDoS attacks 
  • Botnets
  • Computer worms
  • Adware
  • Trojan horses

Palo Alto: Working of Network Security 

Network security works by these three principles of policies, enforcement, and auditing. 


The procedures and rules for all permitted personnel accessing and utilizing a corporation’s IT resources and assets are outlined in an IT security policy. This is the most important document in terms of network security. The main objective is to provide clear guidelines for securing organizational assets.

Today’s employees frequently utilize a variety of tools and software to do business efficiently. These routines are supported by policies that are motivated by the organization’s culture and focus on properly enabling these tools for employees. The policy must also outline the enforcement and auditing processes for any regulatory compliance to which a company is subject.


The objective of enforcement should be to protect the networks’ availability, integrity, and confidentiality of all devices and information by monitoring all network traffic flows. While implementing safeguards, network security employs a defense-in-depth strategy based on the “CIA” triad’s principles:  

  • Confidentiality – Preventing unauthorized entities from gaining access to assets.
  • Integrity – Ensuring that asset change is done in a specific and authorized way.
  • Availability – Preserving the device in a state where permitted users have ongoing access to the assets.

The objective of strict enforcement is to enable CIA access to flows of network traffic. The first step is to categorize flows of traffic by content, user, and application. All apps, regardless of protocol, port, encryption, or evasive techniques, must initially be recognized by a firewall as the vehicle carrying content. The material carried by an application can be fully seen with proper identification of the application. Policy administration may be made easier by recognizing apps and connecting their usage to the identity of a user, all while evaluating the content for CIA principles at all times.

Defense in depth is regarded as the network security’s best practice, requiring that the network be guarded in layers. Access control, identity, authentication, encryption, malware detection, content filtering, URL filtering, and file type filtering are some of the security measures used by these layers to sift out threats attempting to enter the network.

Antivirus components, IPS (intrusion prevention systems), and firewalls are used to create these levels. The firewall (a mechanism of controlling access) is the network security’s cornerstone and is one of the components for enforcement.

Using legacy technology, delivering Network traffic flow’s CIA is challenging. Conventional firewalls are hampered by restrictions that depend on protocols and ports to identify programs – which have developed evasive features to get around the controls meanwhile – and also the notion that an IP address corresponds to user identification.

The access control objective is maintained in firewalls of the next generation, while the technology is modernized; they monitor all traffic throughout all ports, categorize their content and applications, and identify workers as users. It provides access restrictions that are sophisticated enough to implement an organization’s policy on IT security as it pertains to every employee without compromising security.

As add-on components to the standard architecture, supplementary services for stacking network security for executing a defense-in-depth methodology have been included. For instance, antivirus software and IPS are excellent tools for screening material and prohibiting malware assaults. Organizations must, however, be careful of the added cost and complexity that extra components may bring to the network security, and they must not rely on these auxiliary components to perform the firewall’s fundamental function.


The auditing of the network security process necessitates a review of enforcement methods to see how effectively they have matched with regards to the security policy. Auditing encourages continuous improvement by forcing firms to evaluate the implementation of their policies on a regular basis. This allows companies to adapt their enforcement and policy methods in response to changing needs.

Most significant Network Security Components

The four most important components of network security are:

  1. Firewalls.
  2. NAC.
  3. IPS.
  4. SEIM. 

DLP, anti-malware and antivirus software, application, online, and email security, and more are among the options.

Given that almost all applications and data are connected to the network, network security is critical in securing networks against data breaches. A hacked network can damage your company’s reputation and prevents you from getting involved in the business. Businesses can reduce the risk of sabotage and data theft by implementing a robust network security solution


Through this session, you have now successfully comprehended the concept of Network Security, various types of threats like trojan, spyware, malware, DDOS, etc. You have also learned about how policies, enforcement, and auditing factors influence while working with Network Security, and finally the crucial components in network security

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