NGFW

A traditional firewall decides what to allow or block based on source IP, destination IP, port, and protocol. An NGFW understands what the traffic actually is and does deeper inspection and policy enforcement.

What NGFWs add beyond basic firewall

Application identification — recognizes specific applications regardless of port. Zoom might use port 443, as does HTTPS traffic — an NGFW can tell the difference and apply separate policies.

Intrusion Prevention System (IPS) — inspects traffic for known attack signatures and anomalous patterns, blocking threats at the network edge before they reach endpoints.

SSL/TLS inspection — decrypts, inspects, and re-encrypts HTTPS traffic to detect threats hiding inside encrypted sessions. Requires certificate trust configuration on client devices.

User-based policy — ties firewall rules to authenticated users (integrated with Active Directory, Entra ID, or JumpCloud) rather than just IP addresses. "Marketing team can access the internet but not the server VLAN" enforced by identity, not by IP.

URL filtering and content categories — blocks access to categories of websites (malware, phishing, P2P) across all users.

Threat intelligence — cloud-connected feeds that update blocking rules as new threats emerge.

NGFWs are more resource-intensive and expensive than traditional firewalls, but for any organization with sensitive data, remote users, or cloud services, the added inspection capabilities are essential. Basic port/protocol firewalls are insufficient against modern threats.