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A next-generation firewall (NGFW) adds application awareness and deeper traffic inspection to traditional firewall controls. That can give security teams more context for enforcing network rules, detecting threats, and separating network segments—but the benefits depend on policy, configuration, performance, and integration with other security controls.
What is a next-generation firewall?
NIST describes application data awareness as the distinguishing feature of an NGFW: it can inspect application-layer data (Layer 7) in addition to lower-layer network information. In its November 2022 Guide to a Secure Enterprise Network Landscape (SP 800-215), NIST lists deep packet inspection (DPI), intrusion prevention (IPS), and—in configurations that use it—decryption and inspection of TLS traffic among NGFW capabilities.
That application context can let a policy distinguish traffic by application or service rather than relying only on an address and port. Some architectures can also use user or device identity as policy context, when the firewall has suitable identity and device information.
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A traditional firewall commonly filters by network addresses, ports, protocols, and connection state. An NGFW can add application identification and inspection, then apply threat controls to what it sees. The distinction is additional context and enforcement capability, not a guarantee that every product has every feature enabled.
#1 Best Overall
- 【Processor & OS】Firewall Mini PC with Intel J3710 CPU up to 2.40GHz, 4Cores4threads 2MB L2 Cache, TDP 6w, supports AES-NI/Wol. It tested with pf-sense linux ubuntu and other popular open source os. ("DEL" key to enter BIOS)
- 【Interfaces】The firewall pc has 4 * Intel I226-V lan ports(up to 2.5G), 2 * USB3.0 ports, 1 * RS232 COM port, 2 * HD port, 1 * DC port. Equipped with VESA mount, you can install the micro pc behind the monitor to save space.
- 【RAM & Storage】The firewall router equipped with 8G DDR3 RAM, max support 8GB; 240GB mSATA SSD, can be up to 512GB. Not support HDD.
- 【Fanless Design】The small firewall box is only small but powerful. Low power consumption, only 6W; fanless heat dissipation design, aluminum alloy shell, efficient and fast heat dissipation, support 24/7 hours working, no noise. Equipped with VESA mount, you can install the micro pc behind the monitor to save space.
- 【12 Months Service】You will get 1*mini pc，size:5.27 * 4.98 * 1.43 in weigh:500g. If you encounter any problems during the use, please contact us through Amazon, we have a professional and efficient team dedicated to serving you.
| Control | Traditional firewall | NGFW |
|---|---|---|
| Common rule context | Addresses, ports, protocols, and connection state | Those lower-layer details plus application data awareness; identity or device context may be available in some architectures |
| Traffic inspection | Packet filtering and stateful inspection | May add deep packet inspection and application identification |
| Threat controls | Not inherent in the basic firewall definition | May integrate IPS and other controls; availability varies by product and configuration |
| Encrypted traffic | Can enforce connection rules without seeing encrypted payload contents | May decrypt and inspect selected TLS traffic, subject to technical, privacy, and performance trade-offs |
What does a next-generation firewall do?
Identify and control applications
Application-aware rules can distinguish the application using a connection instead of assuming that a port reliably identifies its purpose. This can support more specific allow, restrict, or block policies. Check Point’s vendor-authored buyer guidance recommends evaluating application coverage, identification depth, resistance to evasion, and how often application information is updated. Those are useful evaluation questions, not independent proof of any product’s performance.
Inspect traffic for threats
NGFWs may combine inspection with IPS and other security features. Check Point’s guide also suggests evaluating sandboxing, anti-phishing, antivirus, anti-bot, DNS security, threat intelligence, and integrations. These are capabilities to check in a specific offering; they should not be assumed to come with every NGFW or to work identically across deployments.
Rank #2
- Quad Core J3710 Processor: F3 firewall hardware with Pentium J3710 Processor, 4 Cores 4 Threads, 2M Cache, up to 2.64 GHz, TDP 6.5 W. Compatible with OPNsense, Linux, ESXi, Proxmox
- 4 x i225V 2.5GbE LAN: J3710 mini pc with 4 x i225V 2500Mbps LAN, can monitor network data, improve network security, powerful and widely used
- DDR3 RAM mSATA Slot: J3710 firewall pc with 1 x DDR3L SO-DIMM memory, 1 x mSATA SSD slot, 1 x SATA 3.0 slot(SATA Cable included), 1 x Mini-PCIe Slot
- HD DP Dual Display: Micro firewall appliance J3710 integrated HD Graphics, HD + DP dual display interfaces improve work efficiency
- Fanless Mini Size: Firewall appliance J3710 with aluminium alloy body, fanless quiet running without noise. Size only 11 x 10 x 3.5 cm
Apply rules across network segments
The U.S. National Security Agency recommends using distributed NGFWs to restrict unapproved traffic and enforce access controls between approved network segments. It pairs network enforcement with identity verification, device-posture validation, and least privilege. In practice, a firewall can help implement segmentation, but the quality of the result depends on how segments and policies are designed and on whether identity and device context are reliable.
Use different deployment forms
NIST describes NGFW deployment as data-center appliances, software running in cloud virtual machines, or cloud firewall services (often called FWaaS). NIST’s zero-trust implementation project also documents physical, virtual, containerized, and cloud-delivered firewall examples managed centrally. These forms change where inspection occurs and who operates it; the right fit depends on network architecture and operational requirements.
Rank #3
- Compact and Efficient Design: The FortiGate 40F is designed for small to mid-sized businesses and enterprise branch offices, featuring a compact, fanless desktop form factor that ensures quiet operation and minimizes space usage.
- Robust Connectivity Options: Equipped with 5 GE RJ45 ports, including 1 WAN port and 4 internal ports, this model provides essential connectivity and flexibility for various network configurations in a small-scale environment.
- High-Performance Security: Offers up to 1 Gbps IPS throughput and 600 Mbps threat protection throughput, using Fortinet’s purpose-built security processor technology to deliver industry-leading performance and protection for SSL encrypted traffic.
- Advanced Threat Protection: Integrated with Fortinet’s AI-powered FortiGuard Labs, the FortiGate 40F offers comprehensive cybersecurity, identifying and mitigating both known and unknown threats to maintain robust security across your network.
- Simplified Management and Deployment: Features a user-friendly management console that provides comprehensive network automation and visibility, coupled with Zero Touch Integration with Fortinet’s Security Fabric for easy deployment.
Why an NGFW does not create zero trust on its own
A firewall is an enforcement point within a wider security architecture. NIST’s implementation examples show firewalls used for segmentation and user- or application-based controls, not as a substitute for the rest of zero-trust design. Zero trust also requires appropriate identity verification, device context, access decisions, and least-privilege policies. Buying or deploying an NGFW alone neither establishes that architecture nor guarantees that compromise will be prevented.
What changes when an NGFW inspects encrypted traffic?
Visibility depends on the TLS version and method
Decrypting selected TLS sessions can expose malicious activity that would otherwise remain inside encrypted traffic, but visibility is not automatic. NIST’s final SP 1800-37, published September 17, 2025, explains that TLS 1.3’s approach to forward secrecy may interfere with passive decryption techniques enterprises use to inspect TLS 1.2 traffic. The publication demonstrates standards-compliant approaches for maintaining TLS 1.3 visibility; the practical method depends on the environment.
Rank #4
- 【Processor & OS】Firewall Mini PC with Intel J3710 CPU up to 2.64GHz, 4Cores 4threads 2MB L2 Cache, TDP 6.5w, supports AES-NI. It tested with pf-sens/opn-sense linux ubuntu and other popular open source os. ("DEL" key to enter BIOS)
- 【Interfaces】The firewall pc has 4 * Intel I226 lan ports, 2 * USB3.0 ports, 1 * RS232COM port, 2 * HD port, 1 * DC port. Equipped with VESA mount, you can install the micro pc behind the monitor to save space.
- 【Fanless Design】only 6.5W; fanless heat dissipation design, aluminum alloy shell, efficient and fast heat dissipation, which can withstand temperatures up to 60°C. support 24/7 hours working, no noise.
- 【RAM & Storage】The firewall router equipped with 8G DDR3 RAM, max support 8GB; 128GB mSATA SSD, up to 512GB. Not support HDD. Size:5.27 * 4.98 * 1.43 inches, Weigh:500g, small but powerful.
- 【12 Months Service】You will get a firewall pc and accessories，If you encounter any problems during the use, please contact us through Amazon, we have a professional and efficient team dedicated to serving you.
Decryption creates security and privacy responsibilities
NIST SP 1800-16 warns that decryption creates a place where plaintext and key material may be exposed, can have compliance implications, and can become a valuable target. Some organizations may reasonably conclude that the risks of inspection outweigh its benefits and instead analyze traffic patterns. Where decryption is used, its scope, exclusions, certificate and private-key handling, access controls, logging, and performance impact need deliberate design.
How to evaluate an NGFW for your environment
Compare candidates against the network and operating model you actually have. Check Point’s buyer guide raises several of these topics, but it is vendor-authored guidance rather than neutral comparative testing.
Quick Recap
Best Value
- APPLIANCE ONLY: Hardware unit sold without a service subscription — security services, firmware updates and support are NOT included and must be purchased separately to activate protection.
- PERFORMANCE: Up to 2.5 Gbps firewall inspection, 1 Gbps threat prevention and 1.2 Gbps IPSec VPN throughput driven by SonicWall's patented Reassembly-Free Deep Packet Inspection (RFDPI) engine.
- CONNECTIVITY: 8x1GbE + 2x1G SFP in a desktop form factor; zero-touch deploy and manage on-box or via cloud Network Security Manager (NSM).
- THREAT PROTECTION: SonicOS 8 delivers intrusion prevention, gateway anti-malware, application control, TLS/SSL decryption, Capture ATP multi-engine sandboxing (RTDMI) and reputation-based content & DNS filtering with an active service subscription.
- BUILT FOR SMALL BUSINESS & BRANCH: Secure SD-WAN, IPSec and SSL VPN plus Zero-Trust Network Access through Cloud Secure Edge keep distributed sites and remote workers protected.
- Application identification: Check the breadth and depth of application coverage, evasion handling, and update quality.
- Threat controls: Identify which features are included, which require separate configuration or licensing, and what performance costs they add.
- TLS inspection: Ask how the deployment handles TLS 1.3, certificate and key management, privacy, compliance, and exclusions.
- Identity and segmentation: Verify integration with identity and device systems and test the specific access-control use cases you need.
- Deployment fit: Compare appliance, virtual-machine, container, and cloud-service options against where traffic must be inspected and who will manage the controls.
- Operations and integration: Assess policy management, APIs, automation, orchestration, interoperability, support lifecycle, and the skills required to run the system. Check Point identifies automation, hybrid-cloud support, and scalability as comparison concerns; treat these as checklist prompts, not market-wide findings.
- Capacity under security features: Request measurements for your traffic mix with the intended inspection and threat controls enabled, then validate in a representative environment. There is no established independent, apples-to-apples performance ranking in the cited material.
- Total cost: Account for deployment, management, support, and the resources needed to maintain policies and integrations, not only the purchase price.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
