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A stateful firewall means all the traffic that is transmitted through the firewall is matched against a session. Also, each session is matched against a security policy as well.
Palo Alto has everything that is needed to call it the next-generation firewall. It has an intrusion prevention system. It also has application control features. In terms of delivery, it is much different from other vendors. It delivers the next generation features using a single platform.
The following are the advantages of Single Pass Parallel Processing (SP3) architecture:
Palo Alto provides the visibility that is needed by Splunk to provide actionable and usable insights. Both Palo Alto and Splunk work together to keep the network secure.
Activities such as signature process and network processing are implemented on software in PA-200 and PA-500. However, the higher models contain a dedicated hardware processor.
You need to use the Pre-NAT address and Post-Nat zone.
When there is a need for the internal resources on a trust zone to access DMZ resources using public IP addresses of an untrusted zone, the U-turn NAT is applicable.
The Tap deployment mode is the one, which allows monitoring of traffic passively across the network. It uses a tap or switch SPAN/mirror port for this purpose.
In the Virtual ware deployment mode, the firewall is installed transparently on a network segment. The installation will be done by binding two interfaces into a single set.
In the Layer2 deployment mode, multiple interfaces are configured into a virtual switch or VLAN in L2 mode.
In the Layer3 deployment mode, traffic is routed by a firewall across multiple interfaces. To do this, each interface needs to be assigned an IP address. Besides, a virtual router also needs to be defined to route the traffic.
Palo Alto comes with Virtual Wire mode by default.
When in Virtual Wire mode, Palo Alto supports features such as
App-ID is the short form for Application Identification. It is the main component in Palo Alto. The responsibility of App-ID is to identify the applications, which traverse the firewalls independently.
There are multiple benefits to using Panorama. Some of these benefits include:
The following are the main areas in which Panorama adds value:
U-turn NAT is a logical path used in a network. In U-turn NAT, the users have to access the internal DMZ server. For this purpose, they use the external IP address of that server.
A virtual router is a function of the firewall, which is a part of Layer 3 routing.
A virtual system is an exclusive and logical firewall in Palo Alto. Being an independent firewall, the traffic in a virtual system is kept separate.
Endpoint security ensures the protection of individual access points in the network and sensitive data. It is a process, which illustrates techniques, tools, and applications or products, which can be used to protect devices including computer systems, laptops, and smartphones, etc.
Single-pass processing architecture operates only once on a packet. Similarly, activities such as policy lookup, application identification, networking functions, and decoding, and signature matching are also will be performed only once when a packet is processed. Even the content is also scanned only once in the Single-pass processing architecture.
Using the Zone protection profile, you can get protection from attacks such as flood, reconnaissance, and packet-based attacks, etc. It provides you protection from flood attacks such as SYN, ICMP, and UDP, etc. The reconnaissance protection enables you to defend against port scans and host sweeps. In the case of packet-based protection, you can get protection from large ICMP packets and ICMP fragment attacks.
WAF is the short form of a Web Application Firewall. It monitors web applications for security issues, which may arise due to errors in the code.
You can view
Palo Alto Wirefire highlights the threats that need more attention using a threat intelligence prioritization feature called AutoFocus. It is a cloud-based service, which provides malware sandboxing.
These are the modes in which Palo Alto can be configured. Here is a brief of these modes:
HA1 and HA2 have dedicated HA ports. HA1 is a control link whereas HA2 is a data link. These links are used by firewalls to synchronize the data and maintain state information.
HA is the short form of High Availability. The HA is a deployment type in which two firewalls are placed together and configuration is synchronized. This is done to prevent a single point of failure in the network. This HA deployment enables redundancy and ensures the continuity of the business. In case, one firewall fails, the other one ensures maintaining the security of the traffic.
The high-availability feature on the PA-200 is called HA Lite in Palo Alto. The HA Lite provides a lighter version of HA capabilities. Some of the capabilities of HA Lite include - DHCP Lease information, PPPoE lease information, A/P High Availability without session sync, Failover of IPSec Tunnels, Configuration sync, and Layer 3 forwarding tables. Some of the features that are not available in HA include – Jumbo Frames, Link Aggregation, A/A High Availability, and A/P High Availability with session synchronization.
GlobalProtect agent is used in Remote User-to-Site VPN deployment. It is used to enable the remote user to establish a secure connection through the firewall.
Palo Alto Networks firewall supports two media types, which include copper and fiber optic.
The recommended ports to be used in a HA are:
It is a Layer 1 SFP+ interface. In a HA configuration, this port connects two PA-3200 series firewalls. This port can be used for HA2 and HA3 connections. Raw layer 1 traffic is transmitted on the HSCI ports.
This GlobalProtect VPN supports clientless SSL VPN and provides access to the applications in the data center.
The log forwarding options supported in Palo Alto include the following:
A virtual wire interface allows the transmission of traffic between two interfaces by binding them together.
The Application Command Center provides visibility into traffic patterns and actionable information on threats by using the firewall logs.
Application override is used to override the App-ID (normal Application Identification) of specific traffic transmitted through the firewall.
AutoFocus is a threat intelligence service, which provides easier identification of critical attacks so that effective action can be taken without the need for additional resources.
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The Application Incomplete can be understood as - either the three-way TCP handshake is not completed or it is completed but there was no data to identify the application after the handshake.
Ravindra Savaram is a Content Lead at Mindmajix.com. His passion lies in writing articles on the most popular IT platforms including Machine learning, DevOps, Data Science, Artificial Intelligence, RPA, Deep Learning, and so on. You can stay up to date on all these technologies by following him on LinkedIn and Twitter.