Full English Description for Cisco FPR4145-NGFW-K9

1. Official Short Overview

Cisco FPR4145-NGFW-K9: Top-tier flagship 1RU rack-mount Next-Generation Firewall (NGFW) from discontinued Cisco Firepower 4100 series (End-of-Sale Jan 6, 2026, limited residual TAC support). Factory preloaded Firepower Threat Defense (FTD v7.x) as primary OS, permanent Security Plus K9 unrestricted base license. Fixed native port bank: 8×1/10G SFP+ multi-speed fiber ports, two independent interchangeable NM-2 modular expansion bays supporting copper, 10G SFP28, 40G QSFP28, dual-width 100G QSFP28 breakout uplink modulesCisco. Standalone 1G copper out-of-band management port, RJ45 serial console, USB 2.0 Type-A port. Dual hot-swappable 1100W AC power supplies factory standard for full 1+1 redundancy, dual 22-core Intel Xeon split security processors with dedicated Cavium NPU hardware crypto offload, 384GB DDR4 ECC memory, dual hot-swappable U.2 NVMe SSD slots (1×900GB drive preinstalled, second slot supports SW RAID 1 for log/threat rule redundancy). Dual software support: FTD unified NGFW or classic Cisco Secure Firewall ASA v9.x logical device (full chassis reimage required to switch OS).

Official Certified Performance Metrics (1024B UDP test packets)

Raw stateful firewall throughput (FW only): 80.0 Gbps
Full threat-inspected NGFW throughput (FW+AVC+IPS): 55.0 Gbps
Standalone Snort 3 NGIPS inspection throughput: 55.0 Gbps
Hardware-accelerated IPsec VPN throughput: 24.0 Gbps (up to 26.0 Gbps with FTD 7.2 VPN offload enabled)
TLS/SSL hardware decryption throughput: 10.0 Gbps
Max concurrent TCP/UDP connections with AVC enabled: 35,000,000
Max new connections per second with AVC: 1,500,000
Total concurrent AnyConnect remote + site-to-site IPsec VPN peers: 20,000
Maximum logical routed VLAN interfaces: 1024
Maximum multi-context virtual firewalls under K9 license: 1000

Supported Management Tools

Local ASDM/FDM web GUI, Firepower Management Center (FMC), Cisco Security Manager (CSM), Cisco Defense Orchestrator (CDO), FXOS chassis manager, serial console, USB offline backup.

Typical Deployment Scenarios

Hyperscale enterprise headquarters, nationwide carrier core DMVPN backbone aggregation, multi-building large university core edge, large carrier MSP multi-tenant colocation, ultra-high-bandwidth hybrid cloud data center segmentation requiring factory-standard dual redundant power, dual expandable 100G uplink module bays and maximum concurrent connection/multi-tenant virtualization capacity.

2. Complete Hardware & Platform Overview

Product Line Positioning

The FPR4145-NGFW-K9 is the absolute flagship modular rack appliance in the entire Firepower 4100 generation, positioned above FPR4110/4112/4115/4125 mid-tier models. It shares the standard 19-inch 1RU rack form factor and dual independent NM-2 expansion slots with all other 4100 series appliances, but delivers maximum hardware specs in the platform lineup: dual hot-swappable redundant power supplies factory standard, dual 22-core Intel Xeon split CPUs, 384GB DDR4 ECC memory, industry-leading 35 million concurrent connection counts, full 100G QSFP NM-2 dual-width module compatibility, and a 1000 multi-context virtual firewall limit for hyperscale carrier and ultra-large enterprise data center workloads.

The split dual-chip architecture segregates basic L3 forwarding and heavy security offload tasks (bulk IPsec encryption, massive TLS decryption, Snort 3 IPS, AVC deep application inspection) with dedicated hardware QuickAssist crypto acceleration, eliminating throughput degradation when all threat services run simultaneously at full line rate. The chassis runs FXOS chassis manager to control all hardware resources, then instantiates either FTD unified NGFW or ASA classic firewall as a single logical device (the two OSes cannot run concurrently without full chassis reimage).

The permanent K9 Security Plus license removes DES encryption limitations and unlocks full enterprise feature set: unlimited TLS proxy, complete dual-mode HA, full multi-context virtualization, 1024 VLANs, maximum VPN peer counts, and full AVC/IPS/AMP feature access, outperforming all lower-tier Firepower 4100 and discontinued Firepower 2100 fixed-port appliances. Cisco ended sales of all Firepower 4100 hardware on Jan 6, 2026; the Secure Firewall 4200 series is the official replacement platform.

Physical Chassis & Mechanical Specs

Form factor: 1RU 19-inch EIA rack-mount metal chassis, included rack mounting rails
Dimensions (H×W×D): 4.44 cm × 42.90 cm × 75.43 cm
Weight: 17.87 kg fully loaded (dual PSU, two NM modules, all fans)
Cooling: 3+1 hot-swappable redundant variable-speed front-to-back fans; single fan fault triggers remaining fans to ramp full speed without traffic outage
Operating temperature: 0°C ~ +40°C below 10,000 ft altitude; 0°C ~ +35°C from 10,000–13,000 ft altitude
Storage temperature: -40°C ~ +65°C
Humidity: 5–95% non-condensing
Max operating altitude: 3048 m; full NEBS Level 3 telecom certified
Physical security: Integrated Kensington lock slot for chassis anti-tampering

Power Supply Specifications

Standard shipment: Dual hot-swappable 1100W universal AC power supplies (100–240 VAC, 50/60 Hz) factory installed for 1+1 full power redundancy
DC power option: Optional 950 W hot-swappable DC power supplies (-40 to -60 VDC) for telco rack environments
Power efficiency: >92% at 50% load; load sharing active with dual PSUs installed
Hot-swappable: PSU replacement without full chassis power shutdown

Hardware Core Architecture

Processing: Dual split flagship high-performance architecture – two 22-core Intel Xeon 6152 x86 general forwarding CPUs + dedicated multi-core Cavium NPU with QuickAssist crypto offload engine for wire-speed IPsec/TLS acceleration
Memory: 384 GB soldered DDR4 ECC high-speed SDRAM
Boot storage: 16 GB onboard eMMC for FXOS chassis OS
Data storage: Dual hot-swappable U.2 NVMe self-encrypting SSD drive bays; 900GB SSD preinstalled in slot 1, slot 2 supports SW RAID 1 for log retention and threat rule database redundancy

Port Layout & Interface Breakdown

Native fixed fiber port bank (no built-in copper RJ45 ports):
- 8 × SFP+ multi-speed fiber slots supporting 1G/10G SFP/SFP+ transceivers (SR/LR/SX optical modules) for campus, data center and cloud uplinks
Dual independent front NM-2 modular expansion bays (two separate slots for flexible port scaling):

Supported interchangeable hardware bypass modulesCisco:
- FPR3K-XNM-8X10G: 8×1/10G SFP+ fiber hardware bypass module
- FPR3K-XNM-4X40G: 4×40G QSFP28 fiber hardware bypass module (each port breakout to 4×10G)
- FPR3K-XNM-2X100G: Dual-width 2×100G QSFP28 fiber hardware bypass module (occupies both NM-2 bays simultaneously)
- FPR3K-XNM-8GE: 8×1G RJ45 copper hardware bypass module
Dedicated out-of-band management port: 1×1G copper RJ45, isolated from production data plane for secure chassis/FTD management
Console & storage ports:
- RJ45 RS-232 serial console for local CLI access
- USB 2.0 Type-A port for firmware upload, configuration backup, log export
Failover port: DB-15 serial port for stateful sync in Active/Standby or Active/Active HA firewall pairs
Dual IEC AC power input sockets for primary and redundant power supplies

Front Panel LED Indicators

Global power status, dual independent PSU health, system fault alarm, FTD logical device operational status, failover sync status, fan fault warning, individual link/activity LEDs for all native SFP+ and expansion module ports.

Compliance Certifications

FCC Class A, CE, FIPS 140-3 Level 1, EMC enterprise industrial standard, full NEBS Level 3 telecom qualified.

3. K9 Security Plus Full License Feature Set

Encryption & VPN

Full AES-128/AES-192/AES-256, 3DES, DES support (no DES-only restrictions on K8 base license)
Unlimited TLS proxy for SIP/SCCP VoIP inspection
Site-to-site IKEv1/IKEv2 IPsec tunnels, AnyConnect SSL remote access VPN, clientless SSL VPN
GRE DMVPN hub-spoke encapsulation, multi-chassis VPN clustering (max 16 nodes)
20,000 total concurrent IPsec/AnyConnect VPN peers maximum

Firewall & Multi-Context Virtualization

Stateful packet inspection (SPI) firewall, routed / transparent firewall modes
Multi-context virtual firewall segmentation (up to 1000 independent isolated logical firewalls)
Object-group ACL policy management, identity NAT, policy NAT, PAT overload, dynamic NAT pools
Full dual-mode high availability: Active/Standby and load-balanced Active/Active inter-chassis failover

Threat Defense Suite (FTD Unified OS Native)

Integrated Snort 3 NGIPS intrusion prevention system with global Talos threat signature updates
AVC Application Visibility & Control: 6000+ recognized applications, geolocation, user-based policy
Cloud URL filtering database (280M+ categorized global websites)
AMP for Networks cloud malware sandboxing (optional subscription)
Multi-layer DDoS protection: SYN flood guard, TCP packet normalization, malformed packet filtering, strict URPF anti-spoofing
Layer 7 protocol ALGs: FTP, H.323, SIP, SCCP, RTSP, DNS, HTTP/S, SMB, RDP and mainstream SaaS applications

Routing & Network Services

Static routing, policy-based routing (PBR), BGP, OSPF, EIGRP dynamic routing protocols
Full dual-stack IPv4/IPv6 inspection and forwarding
Local DHCP server for internal LAN endpoints and IoT devices
PPPoE client for broadband ISP termination
Hierarchical four-level QoS bandwidth queuing with DSCP marking preservation across VPN tunnels

AAA, Logging & Management

AAA authentication, authorization, accounting via external RADIUS/TACACS+ servers
Local user credential database for standalone emergency admin login
Comprehensive event logging, remote Syslog export to external SIEM platforms (PCI-DSS/HIPAA audit compliant)
SNMPv3 secure monitoring for chassis hardware, throughput, VPN tunnel and threat status
Native ISE integration for user-identity-aware security policies
REST API for third-party orchestration and automation

4. Supported Management Platforms

FTD / ASA CLI Console: IOS-style command-line interface via serial console or SSH remote access for scripting and advanced troubleshooting
ASDM / FDM Local GUI: Embedded HTTPS web interface for standalone single-device configuration, real-time traffic dashboards, VPN monitoring and threat reporting
Cisco Security Manager (CSM): On-prem centralized policy platform for bulk multi-site deployment orchestration, mass firmware upgrades and compliance reporting
Firepower Management Center (FMC): Primary unified management for FTD NGFW deployments, centralizes NGIPS rules, AVC policies, malware sandboxing, URL filtering and AI-powered policy automation
Cisco Defense Orchestrator (CDO): Cloud-hosted multi-device management supporting zero-touch provisioning, cloud policy sync and SecureX cloud-native threat orchestration
FXOS Chassis Manager: Chassis-level GUI/CLI to manage power supplies, fans, NM-2 expansion modules, SSD storage and logical device instantiation (switching FTD/ASA requires full chassis reimage)
Offline backup: TFTP and USB dual methods for OS firmware upload and full configuration export/restore

5. Key Differentiators vs Related Cisco Firewall Models

vs FPR4145-NGFW-K8 DES Base License: Full unrestricted AES encryption, unlimited TLS proxy, expanded VLAN/session/VPN limits, 1000 multi-context virtualization and complete dual-mode HA enabled; K8 license enforces hard caps on encryption, TLS sessions and virtual instances.
vs FPR4145-ASA-K9 ASA-Only PID: Identical physical hardware chassis, but factory locked to classic ASA software instead of unified FTD NGFW. ASA variant uses separate standalone IPS images, lacks native integrated AVC and SecureX cloud orchestration, and has limited unified FMC threat management compatibility.
vs FPR4140-NGFW-K9 Flagship Mid-Tier 4100 Model: Dual 22-core Xeon split processors vs dual high-core CPUs, larger 35M concurrent TCP/UDP sessions vs 30M, 55 Gbps full threat-inspected throughput vs 55 Gbps, identical 20,000 VPN peers and 1000 multi-context capacity, identical dual redundant power and NM-2 100G uplink expansion capability, higher raw firewall throughput (80G vs 70G).
vs FPR4125-NGFW-K9 High-Performance 4100 Model: Lower concurrent session counts (25M vs 35M), identical 20,000 VPN peers and 1000 multi-context capacity, identical dual redundant power and NM-2 100G expansion capability, cost-optimized for large enterprise vs ultra-hyperscale carrier backbone workloads.
vs Secure Firewall 3130-NGFW-K9 Modern Active Production Platform: Dual independent NM-2 expansion slots (single NM-2 bay on 3100 series), native all-fiber 8×10G SFP+ fixed ports (no built-in copper), split Intel/Cavium dual-processor architecture vs unified single AMD chip, USB 2.0 instead of USB 3.1, dual redundant power supplies standard, discontinued EOL status vs active production lifecycle.
vs Discontinued FPR2140-NGFW-K9 Legacy Flagship: Two NM-2 expansion bays vs single expansion slot, native 8×10G SFP+ vs limited 4×10G SFP+, dual hot-swap redundant PSUs factory standard, massively upgraded 384GB ECC memory, hot-swappable NVMe SSD storage, significantly higher TLS decryption throughput, 1024 VLAN capacity vs 200 VLANs, support for up to 16 cluster nodes vs max 8 nodes.

6. E-Commerce Short Marketing Summary

Cisco FPR4145-NGFW-K9 Flagship Top-Tier Modular 1RU Rack-Mount All-Fiber Multi-Speed SFP+ Next-Generation Firewall, discontinued legacy Cisco Firepower 4100 series Security Plus unrestricted K9 NGFW appliance with eight built-in 1/10G SFP+ high-speed fiber uplink ports, two independent NM-2 modular expansion bays supporting optional 10G/40G/100G fiber hardware bypass modules, dedicated out-of-band Gigabit management port, dual RJ45 serial + USB 2.0 console interfaces, dual hot-swappable redundant 1100W universal AC power supplies factory standard, dual flagship 22-core Intel Xeon split security processor architecture with upgraded 384GB DDR4 ECC memory, dual hot-swappable 900GB NVMe SSD slots with factory preinstalled storage, primary Firewall Threat Defense (FTD v7.x) OS with optional ASA OS v9.x support. K9 license delivers full DES/3DES-AES strong encryption, unlimited internal host capacity, stateful SPI firewall, IPsec site-to-site/AnyConnect SSL remote access VPN, inline hardware Snort3 NGIPS intrusion prevention, AVC application visibility & control, NAT/PAT, PPPoE broadband client, unlimited TLS proxy for VoIP communications, up to 1000 multi-context virtual firewalls and dual Active/Standby/Active/Active stateful failover with native multi-device VPN clustering (max 16 nodes). Up to 55.0 Gbps full threat-inspected NGFW throughput, 35,000,000 concurrent TCP/UDP connections and 20,000 simultaneous IPsec VPN tunnels, managed via local ASDM/FDM GUI, serial console, Cisco Security Manager and Firepower Management Center. Discontinued flagship rack-mount NGFW optimized for hyperscale enterprise headquarters, nationwide carrier central DMVPN aggregation hubs and multi-building large university 10G/40G/100G fiber core edge security deployments requiring factory-standard dual redundant power, dual expandable 100G fiber uplink module bays and maximum hyperscale multi-tenant virtualization & concurrent connection capacity.

7. Product Catalog Keyword Tags

Cisco, FPR4145-NGFW-K9, Firepower 4100 Series Top-Tier Flagship Modular 1RU Rack-Mount All-Fiber SFP+ Next-Generation Firewall, Legacy Hyperscale Enterprise National Carrier Core Stateful Inspection NGFW, Dual Hot-Swap Redundant Multi-Fan Front-to-Back Cooling 19-inch 1RU Rack Chassis, Dual Built-In Hot-Swap Redundant 1100W Internal Universal AC Power Supplies, 8 × 1/10GBase-X SFP+ Multi-Speed Native Fiber Uplink Ports, 2 × Independent NM-2 Modular Expansion Bays (FPR3K-XNM-8X10G / FPR3K-XNM-4X40G / FPR3K-XNM-2X100G Hardware Bypass Modules Supported), Dedicated Gigabit Out-of-Band Management 0/0 Port, RJ45 Serial Console Port, USB 2.0 Type-A Storage Port, DB-15 Inter-Chassis Stateful Failover Serial Port, Dual 22-Core Intel Xeon 6152 Unified Split Security Processors with Native QuickAssist Crypto Offload, 384768 MB DDR4 ECC SDRAM, 16 GB System eMMC Boot Flash, Dual Hot-Swap U.2 NVMe SSD Drive Bays (1×900GB Factory Preinstalled), Cisco Firewall Threat Defense FTD Primary OS, Optional ASA OS Dual Software Support, Stateful Packet Inspection SPI, 80.0 Gbps Max Raw Firewall Throughput, 55.0 Gbps Max Full Threat-Inspected NGFW Throughput, 55.0 Gbps Standalone Snort 3 NGIPS Inspection Throughput, 24.0 Gbps Base Hardware-Accelerated 3DES/AES VPN Throughput (26.0 Gbps Offload Enabled), 10.0 Gbps TLS Hardware Decryption Throughput, Snort 3 NGIPS Threat Detection Engine, AMP for Networks Cloud Malware Sandbox Integration, URL Category Web Filtering (6000+ Recognized Applications / 280M+ Global URLs), IPsec IKEv1/IKEv2 DMVPN Site-to-Site & AnyConnect SSL/DTLS Remote Access VPN, Full DES/3DES-AES Unrestricted Strong Encryption Suite, L2 Wire-Speed Integrated Switch Functionality, Dual NM-2 Expandable Port Architecture Supporting 10G/40G/100G Uplinks, NAT PAT Static Dynamic Address Translation, PPPoE DSL Broadband Aggregation Client, VoIP H.323 SIP SCCP TLS Proxy Inspection, Transparent Layer 2 Firewall Mode, Multi-Context Virtual Firewall Segmentation (Up to 1000 Independent Contexts), Active/Standby & Active/Active Dual-Mode Stateful Failover Redundancy, Native Multi-Device VPN Clustering & Load Balancing (Max 16 Nodes), 1024 Logical Routed VLAN Maximum (Security Plus K9 License), 20000 Max Simultaneous IPsec/AnyConnect VPN Peers, 35,000,000 Concurrent TCP/UDP Connections, IEEE 1588v2 PTP Precision Time Protocol, Cisco AI Assistant for Automated Policy Tuning, ISE Identity Integration Support, ASDM/FDM Dual Embedded Local Web GUIs, Cisco Security Manager CSM Centralized Multi-Site Policy Orchestration, Firepower Management Center FMC Threat Rule Centralized Control, Cisco Defense Orchestrator CDO Cloud Multi-Device Zero-Touch Management, SecureX Threat Orchestration Integration, Syslog SNMPv3 Secure Monitoring, Full Dual-Stack IPv4/IPv6 Routing & Inspection Support, Application-Aware Hierarchical QoS Bandwidth Scheduling, FIPS 140-3 Level 1 FCC Class A Office Certified, Full NEBS Level 3 Telecom Qualified, End-of-Sale Legacy Platform (EoS Jan 6, 2026), Limited Remaining Cisco Long-Term EOL Maintenance Support, Security Plus K9 Unrestricted Upgrade Over FPR4145-NGFW-K8 DES Base License, Hyperscale Enterprise Headquarters Modular 1RU All-Fiber 10G/100G Edge Flagship NGFW, National Carrier Central DMVPN Aggregation Dual NM-2 Expandable Dual Redundant PSU Top-Tier Security Appliance, Multi-Building Large University 1000-Context Multi-Tenant Virtual Segmentation Flagship Rack Firewall, Direct Hardware Upgrade Replacement for Discontinued ASA5585-X Legacy Carrier-Grade Rack Appliance

Naming Rule Explanation

FPR: Legacy Firepower hardware prefix for discontinued Firepower 4100 dual NM-2 modular rack security appliances
4145: Top-tier flagship dual expansion bay rack-mount national hyperscale enterprise/carrier core hardware model identifier within Firepower 4100 legacy platform
NGFW: Abbreviation for Next-Generation Firewall, signifies factory PID licensed to run unified Firewall Threat Defense (FTD) primary operating system (distinguishes from ASA-only FPR4145-ASA-K9 PID)
K9: Premium unrestricted Security Plus license identifier unlocking full AES encryption, expanded session/VLAN capacity, unlimited TLS proxy, up to 1000 multi-context virtual firewalls and dual-mode Active/Standby + Active/Active stateful failover; contrasted with K8 base DES-only restricted license

Hardware Distinction Note

FPR4145-NGFW-K9 is the flagship dual-NM modular rack model of discontinued Firepower 4100 generation, unique within the series for dual 22-core Intel Xeon split security processors, 384GB DDR4 ECC memory, factory-standard dual hot-swappable redundant power supplies, dual independent NM-2 expansion bays supporting full dual-width 100G QSFP uplink modules, 35 million concurrent sessions and 20,000 VPN peer limit, with native copper-free all-fiber 8×1G/10G SFP+ fixed port layout plus dual independent NM-2 expansion bays. This product reached Cisco End-of-Sale on January 6, 2026, replaced by the next-generation Secure Firewall 4200 series, with limited residual official TAC support lifecycle remaining.


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