To ensure high availability (HA) across multiple availability zones (AZs) in a cloud service provider (CSP) environment, using a load balancer with health probes is a recommended method. This setup ensures that traffic can be directed to the healthy NGFW instances across multiple availability zones. If one NGFW instance or availability zone goes down, the load balancer can redirect traffic to the available instance(s) in other zones, providing redundancy and maintaining service availability.

NGFWs analyze traffic patterns and application signatures, allowing them to detect and block applications regardless of port usage.

In the context of GlobalProtect with certificate-based authentication, certificate profiles are used to ensure proper validation of the certificates. They perform the following functions:
Define trust anchors, which are the root and intermediate Certificate Authorities (CAs) that the firewall trusts to authenticate certificates.
Specify revocation checks, such as CRL (Certificate Revocation List) and OCSP (Online Certificate Status Protocol), to ensure that the certificates being used have not been revoked.
Map certificate attributes, such as the Common Name (CN), which helps in authenticating users and devices based on their certificates.

Packet-Based Attack Protection examines IP, TCP, ICMP, IPv6, and ICMPv6 packet headers to drop packets with undesirable characteristics like IP spoofing or malformed TCP options that enable split handshakes.

Sandboxing executes suspicious files in an isolated environment and analyzes their behavior, making it effective against zero-day threats.