Full English Description for Cisco ISA3000-4P-K9 (ISA3000-4C-K9)
1. Official Short Order Description
Cisco ISA3000-4P-K9 (official full PID: ISA3000-4C-K9): Fanless DIN-rail rugged industrial next-generation Secure Firewall (OT/Industrial Security Appliance), factory pre-installed permanent Security Plus K9 unrestricted license, 4 fixed 10/100/1000 Gigabit copper data ports, dedicated out-of-band Gigabit management port, wide-temperature hardened industrial hardware, dual wide-range DC power input, supports both ASA OS and Firepower Threat Defense (FTD) operating systems. Powered by Cisco Adaptive Security Algorithm + Firepower threat defense, it delivers full hardware-accelerated DES/3DES/AES IPsec/DMVPN/FlexVPN, AnyConnect SSL/DTLS remote access VPN, OT protocol inspection, AVC application control, integrated NGIPS intrusion prevention, NAT/PAT, unlimited TLS proxy for unified communications, multi-context virtual firewalls, and dual-mode Active/Standby & Active/Active stateful failover. Performance metrics: up to 2 Gbps maximum stateful firewall throughput, 250,000 maximum concurrent TCP/UDP connections, 250 Mbps hardware-accelerated 3DES/AES VPN throughput, supporting 250 site-to-site IPsec tunnels, 250 AnyConnect remote access peers and 100 logical routed VLAN interfaces under K9 license. Managed via local ASDM GUI, serial console, Cisco Security Manager (CSM), Firepower Management Center (FMC) and Cisco Defense Orchestrator (CDO). Still active mainstream industrial security hardware with ongoing support, designed for power substations, factory automation, ITS traffic control, outdoor industrial kiosks and harsh OT network edge segmentation.
2. Complete Detailed Product Overview
Product Line Positioning
The Cisco ISA3000-4C-K9 (market shorthand ISA3000-4P-K9) is the all-copper fanless rugged DIN-rail industrial security appliance in the ISA3000 series portfolio, positioned alongside fiber variant ISA3000-2C2F-K9. It is purpose-built for harsh industrial OT environments where standard office ASA firewalls cannot survive extreme temperature, vibration, shock and electrical EMI interference. Core use cases: industrial control network segmentation, SCADA/DNP3/Modbus OT protocol filtering, remote industrial site DMVPN VPN backhaul, IoT industrial edge threat protection and NERC-CIP / IEC 62443 compliance.
The K9 suffix represents factory pre-activated full Security Plus unrestricted license bundle, removing all weak DES-only encryption limitations of base DES SKUs, unlocking expanded VLAN capacity, unlimited TLS proxy sessions, multi-context virtual firewalls and dual-mode high availability. The ISA3000 series remains active sale with long-term industrial lifecycle support, no formal EoS date announced yet.
Physical Hardware & Rugged Fanless Industrial DIN-Rail Architecture
Form Factor & Mechanical Specs
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Compact box fanless convection cooling, zero moving parts for long MTBF industrial deployment, DIN rail mounting brackets included, dimensions 11.2cm (W) × 13cm (H) × 16cm (D), total weight 1.9kg.
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Extreme industrial operating temperature range:-40°C to +70°C, conformal coated circuit boards, IP40 dust ingress protection, certified for shock/vibration per IEC 60068-2, surge and EMI immunity for power substation environments.
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Dual wide-range DC power input terminals: Supported 9.6–60VDC (nominal 12V / 24V / 48V industrial power supplies), total power consumption max 24W, no AC internal power supply (industrial DC-only design).
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Front panel multi-color industrial LED indicators: Power, system health, failover status, port link/activity, alarm trigger status.
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Integrated physical security lock slot to prevent unauthorized chassis opening.
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Hardware core: Single multi-core industrial-grade security processor, fixed 8 GB DDR4 soldered SDRAM, 8 GB onboard system flash, 64 GB rugged non-field-replaceable mSATA SSD for OS, threat rule databases, configuration and persistent log storage; optional 1GB removable industrial SD card slot for log expansion.
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Dual rear console interfaces: RJ45 RS-232 serial console + Mini USB console for maintenance access.
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Dual rear USB 2.0 Type-A ports for external flash backup, firmware upload and log offloading.
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Dedicated 2-pin alarm I/O terminal block: 2 dry-contact alarm inputs, 1 Form C relay alarm output for industrial site monitoring interconnection.
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Environmental compliance: IEC 61850-3 power substation, IEC 1613, NERC-CIP, ISA99/IEC62443 industrial cybersecurity, IEEE 1588v2 PTP precision time protocol support.
Rear Panel Fixed Port Layout
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4 × 10/100/1000 Gigabit Auto-MDI/MDIX RJ45 Copper Data Ports (GE0/0 – GE0/3)
All-copper fixed I/O design for industrial control LAN, broadband WAN uplink and isolated OT DMZ segments, full auto-crossover without cable adjustment.
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Management0/0: Dedicated standalone 10/100/1000 Gigabit out-of-band management port, fully isolated from production industrial traffic for secure device administration and Firepower management communication.
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Dual console ports (RJ45 serial + Mini USB), two USB 2.0 storage ports, recessed hardware factory reset pushbutton.
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Dual wide-range DC power terminal block for redundant industrial power feed options.
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Alarm I/O terminal block for external industrial alarm sensor and relay signaling.
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DB-15 inter-chassis stateful failover serial port for redundant industrial firewall pair real-time session synchronization.
No Optional Expansion Hardware
ISA3000-4C-K9 is a fixed all-copper design with zero I/O expansion slots; no swappable fiber SFP line cards are supported (fiber variant ISA3000-2C2F-K9 is separate SKU). All Firepower threat defense functions are embedded onboard the base security processor chipset.
Core Performance & K9 Security Plus Full License Capabilities
Official Cisco Datasheet Performance Benchmarks
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Maximum cleartext stateful firewall throughput: 2 Gbps
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Multiprotocol real-world HTTP throughput: 1.1 Gbps
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Maximum concurrent TCP/UDP connection table entries: 250,000 (20,000 hard cap on DES base license)
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Maximum new connections per second: 25,000
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64-byte small packet forwarding rate: 800,000 packets per second
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Hardware-accelerated 3DES/AES IPsec VPN throughput: 250 Mbps
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AVC application control throughput: 1.2 Gbps
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Combined AVC + NGIPS threat inspection throughput: 600 Mbps
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Maximum simultaneous IPsec IKE security associations: 250 site-to-site tunnels + 250 AnyConnect remote access VPN peers
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Maximum logical routed VLAN interfaces: 100 independent security zones (50 VLAN hard limit on DES base license)
Exclusive K9 Security Plus License Advantages vs DES Base SKU
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Full strong encryption suite (DES / 3DES / AES 128 / 192 / 256); base DES SKU only supports weak DES encryption, incompatible with industrial regulatory compliance.
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100 logical routed VLAN interfaces vs 50 VLAN hard cap on base license.
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Unlimited TLS proxy sessions for encrypted SIP/SCCP industrial VoIP inspection; base SKU capped at 1,000 TLS proxy sessions.
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Full dual-mode high availability: Supports both stateless Active/Standby and load-balanced Active/Active inter-chassis failover; HA functionality completely disabled on base DES license.
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Up to 5 independent multi-context virtual firewalls for MSP multi-tenant industrial segmentation; virtual contexts disabled entirely on base DES license.
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Native multi-device VPN clustering and load balancing fully enabled for centralized industrial remote access aggregation.
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2 permanent base AnyConnect Premium SSL/DTLS remote access seats, expandable via separate AnyConnect Plus/Apex subscription licenses.
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Unlimited internal industrial host endpoints with no session throttling or host count limits.
Full Integrated Security & Networking Feature Suite (ASA OS / Firepower Threat Defense OS)
1. Stateful Adaptive Security Algorithm Firewall
Full stateful TCP/UDP connection tracking to eliminate stateless filter bypass risks, object-group based ACL policy management for granular OT traffic segmentation rules. Multi-layer industrial-grade DDoS mitigation: SYN flood suppression, port scan detection, full TCP normalization, malformed packet filtering, source IP anti-spoof URPF strict/loose mode. Specialized Layer 7 OT protocol fixup inspection engines for industrial control protocols: Modbus TCP, DNP3, CIP/IP, IEC 61850 MMS, Siemens S7, Rockwell DF1, Omron FINS, plus standard enterprise FTP, H.323, SIP, SCCP, RTSP, NetBIOS for VoIP and multimedia workloads. Native Transparent Layer 2 firewall mode for inline industrial control network deployment without re-addressing existing SCADA IP ranges. Embedded FirePOWER Next-Generation IPS (NGIPS) with AVC application visibility & control, URL category filtering, malware sandboxing and threat correlation, no separate expansion blades required.
2. Standards-Based Multi-Protocol VPN Suite
Site-to-site IPsec tunnels for secure inter-substation private backbone connectivity over public broadband internet. Legacy IPsec remote access VPN compatibility for older Cisco VPN Client deployments. Clientless SSL VPN + AnyConnect Premium SSL/DTLS remote access for browser and full-client global industrial technician connectivity. Dual IKEv1/IKEv2 key exchange protocol support, full X.509 digital certificate SCEP auto-enrollment for scalable multi-site industrial deployments. GRE tunnel encapsulation for routed non-IPsec traffic across distributed DMVPN industrial VPN fabrics. Dedicated on-board hardware crypto acceleration to eliminate CPU bottlenecks for 2500 concurrent IPsec tunnels. Native multi-chassis VPN clustering and load balancing for centralized regional industrial remote access hub aggregation.
3. Industrial & Broadband Routing & NAT Services
Static one-to-one NAT, dynamic NAT pools, PAT overload for multi-user shared public IP addressing. Native PPPoE client support for remote industrial site broadband ISP aggregation. Local DHCP server supporting up to 1024 internal IP address leases for wired industrial LAN endpoints. Static routing, policy-based routing (PBR), BGP, OSPF, EIGRP dynamic interior/exterior routing protocol support. Dual-stack IPv4 primary architecture with limited partial IPv6 functionality available on latest ASA/FTD OS releases. Local persistent DNS caching to reduce external DNS lookup latency and WAN bandwidth consumption for industrial IoT endpoints.
4. Unified OT Threat Defense Security Stack
Built-in signature-based IDS engine with over 25,000 industrial and enterprise threat detection rules; advanced inline NGIPS threat inspection embedded onboard without extra hardware. Automatic dynamic host blacklisting to quarantine malicious source IP addresses of compromised industrial control endpoints. Strict/loose URPF anti-spoof filtering to block forged source IP traffic in multi-tenant industrial MSP environments. Persistent local SSD event logging + remote Syslog export to centralized industrial SIEM platforms for NERC-CIP / IEC 62443 regulatory compliance audit trails. All administrative access encrypted via SSHv2 remote CLI, HTTPS ASDM web GUI, encrypted SNMPv3 secure device monitoring.
5. AAA Access Control & Audit Logging
Complete AAA authentication, authorization and accounting via external RADIUS and TACACS+ servers for segregated industrial administrative privilege control (operator / maintenance / admin tiered access). Local user credential database for standalone emergency device login without external AAA servers. Comprehensive logging architecture supporting buffered flash storage, USB flash log offloading and remote Syslog archival. SNMPv3 secure monitoring for real-time device health, throughput utilization, DC power supply fault, fanless thermal alarm, VPN tunnel status and Firepower threat statistics alert reporting. Industrial alarm I/O port integration to trigger external site alarms on security events or hardware faults.
6. Application-Aware Hierarchical QoS Bandwidth Management
Four-level traffic priority queuing to prioritize real-time industrial SCADA control traffic and voice/video unified communications over streaming media, SaaS applications and P2P file-sharing background traffic. Per-port bandwidth shaping and policing applied to all four Gigabit copper WAN/LAN/DMZ interfaces to eliminate industrial network congestion and guarantee OT control traffic bandwidth. DSCP marking preservation across IPsec and SSL VPN tunnels for consistent end-to-end industrial QoS policy enforcement across DMVPN hub-spoke architectures.
Management & Configuration Tools
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ASA CLI Console: Full IOS-style command-line interface via serial or Mini USB console, or encrypted SSHv2 remote access for bulk scripting and advanced industrial OT troubleshooting.
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ASDM Embedded Web GUI: Local HTTPS graphical device manager for single-chassis visual configuration, real-time traffic dashboards, VPN tunnel monitoring and unified security event reporting.
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Cisco Security Manager (CSM): Centralized enterprise policy management platform for bulk multi-site ISA deployment orchestration, mass firmware upgrades and cross-device compliance reporting.
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Firepower Management Center (FMC): Dedicated centralized management for FirePOWER NGIPS rule sets, AVC application policies, malware sandboxing and URL filtering threat intelligence updates.
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Cisco Defense Orchestrator (CDO): Cloud-hosted multi-device management for distributed industrial ISA fleets across wide geographic regions.
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TFTP + USB flash dual methods for OS firmware image upload and full configuration backup/restore; offline config editing supported.
Key Differentiators vs Related Cisco Security Platforms
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vs ISA3000-4C-K9 DES Base License: Full unrestricted 3DES/AES strong encryption, expanded VLAN/session capacity, multi-context virtual firewalls and dual-mode Active/Standby + Active/Active stateful failover enabled; base DES SKU lacks compliance-grade encryption and high availability functionality.
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vs ISA3000-2C2F-K9 Fiber Variant: All-copper fixed 4-port design (2 copper + 2 SFP fiber on fiber SKU), lower cost for copper-only industrial site deployments, no fiber uplink hardware support.
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vs ASA5506H-X Hardened Office Firewall: Native industrial DIN rail mounting, wider -40~70°C temperature range, IEC 61850 power substation certification, dedicated industrial alarm I/O terminals, full OT protocol inspection engine, fanless pure industrial OT-focused design.
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vs ASA5508-X-K9 Enterprise Rack-Mount NGFW: Rugged industrial conformal coating, extreme temperature rating, DIN rail form factor, OT protocol support, DC industrial power input, alarm I/O ports, no AC power supply support, lower total throughput (2 Gbps vs 1.8 Gbps on 5508-X).
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vs Legacy ASA Industrial Firewall Hardware: Modern 64-bit ASA/FTD OS architecture, integrated self-encrypting SSD storage, embedded FirePOWER NGIPS, multi-context virtualization, full OT industrial protocol inspection and AnyConnect SSL VPN support unavailable on older legacy ASA industrial hardware.
Typical Industrial Deployment Scenarios
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Power grid substation edge security gateway fully compliant with IEC 61850 and NERC-CIP standards, isolating critical SCADA control LAN from public broadband WAN uplinks.
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Factory automation remote branch security firewall establishing site-to-site DMVPN IPsec backhaul to central enterprise industrial data center.
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Outdoor industrial traffic control kiosk edge NGFW operating in extreme -40°C ~ +70°C temperature ranges with no cooling fans.
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Small industrial MSP multi-tenant colocation boundary security appliance with independent multi-context virtual firewalls for fully separated factory customer OT network traffic segmentation.
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Redundant Active/Active chassis pair for zero-traffic-loss disaster recovery continuity in critical power, water treatment and manufacturing industrial infrastructure.
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Industrial OT network training lab platform for DIN-rail firewall deployment, OT protocol filtering, FirePOWER NGIPS inspection and large-scale DMVPN industrial VPN architecture learning.
3. Short Marketing Summary
Cisco ISA3000-4P-K9 (ISA3000-4C-K9) Rugged Fanless DIN-Rail 4-Port Gigabit Industrial Next-Generation Secure Firewall, active Cisco ISA3000 series Security Plus unrestricted K9 OT security appliance with four fixed 10/100/1000 Gigabit copper data ports, dedicated out-of-band Gigabit management port, -40°C ~ +70°C wide industrial temperature range, IP40 dust protection, IEC 61850 power substation certified, dual wide-range DC industrial power input, alarm I/O terminal block, embedded Firepower NGIPS threat defense, runs ASA OS or Firepower Threat Defense firmware. K9 license delivers full DES/3DES/AES strong encryption, unlimited internal host capacity, stateful SPI firewall, industrial OT protocol inspection, IPsec site-to-site/AnyConnect SSL remote access VPN, inline hardware NGIPS intrusion prevention, AVC application visibility & control, NAT/PAT, PPPoE broadband client, unlimited TLS proxy for VoIP/SCADA communications, multi-context virtual firewalls and dual Active/Standby/Active/Active stateful failover with native multi-device VPN clustering. Up to 2 Gbps cleartext firewall throughput, 250,000 concurrent TCP/UDP connections and 250 simultaneous IPsec VPN tunnels, managed via local ASDM GUI, serial console, Cisco Security Manager, Firepower Management Center and Cisco Defense Orchestrator. Active industrial OT security NGFW for power substations, factory automation control rooms, outdoor industrial kiosks and harsh-environment industrial edge network segmentation deployments.
4. Product Catalog Keyword Tags
Cisco, ISA3000-4P-K9, ISA3000-4C-K9, ISA 3000 Series Fanless Rugged DIN-Rail Industrial Next-Generation Firewall, Active OT Stateful Inspection NGFW, Conformal Coated Industrial Hardware, Wide Operating Temperature -40°C ~ +70°C, IP40 Dust Ingress Protection, IEC 61850-3 / IEC 1613 / NERC-CIP Industrial Certified, Fanless Convection Cooling Zero Moving Parts, DIN Rail Mount Chassis, Single Multi-Core Industrial Security Processor, 8192 MB DDR4 SDRAM, 8 GB System Flash, 120 GB Self-Encrypting mSATA SSD, Optional 1GB Industrial SD Log Card, 4 × 10/100/1000 Gigabit Copper Auto-MDI/MDIX RJ45 Data Ports, Dedicated Gigabit Out-of-Band Management 0/0 Port, Dual Console Interfaces (RJ45 Serial + Mini USB), Dual USB 2.0 Storage Ports, Alarm I/O 2 Input / 1 Form C Relay Output Terminal Block, Dual Wide-Range DC Power Input Terminals (9.6–60VDC), DB-15 Inter-Chassis Stateful Failover Serial Port, Cisco Adaptive Security Algorithm ASA / Firepower Threat Defense FTD Dual OS Support, Stateful Packet Inspection SPI, 2 Gbps Max Cleartext Firewall Throughput, 1.1 Gbps Multiprotocol HTTP Throughput, 250 Mbps Hardware-Accelerated 3DES/AES VPN Throughput, AVC Application Control Throughput 1.2 Gbps, Combined AVC+NGIPS Threat Throughput 600 Mbps, IPsec IKEv1/IKEv2 DMVPN Site-to-Site & AnyConnect SSL/DTLS Remote Access VPN, Full DES/3DES-AES Unrestricted Strong Encryption Suite, Embedded Built-In FirePOWER NGIPS Intrusion Prevention System, Industrial OT Protocol Fixup (Modbus / DNP3 / CIP / IEC61850 / S7), NAT PAT Static Dynamic Address Translation, PPPoE Broadband Client, VoIP H.323 SIP SCCP Skinny Fixup Inspection, Transparent Layer 2 Firewall Mode, Multi-Context Virtual Firewall Segmentation (Up to 5 Independent Contexts), Active/Standby & Active/Active Dual-Mode Stateful Failover Redundancy, Native Multi-Device VPN Clustering & Load Balancing, 100 Logical Routed VLAN Maximum (Security Plus K9 License), 250 Max Simultaneous IPsec VPN Peers, Unlimited TLS Proxy UC Sessions, 250,000 Concurrent TCP/UDP Connections, IEEE 1588v2 PTP Precision Time Protocol Supported, ASDM Adaptive Security Device Manager Embedded Local Web GUI, Cisco Security Manager CSM Centralized Multi-Industrial-Site Policy Orchestration, Firepower Management Center FMC Threat Rule Centralized Control, Cisco Defense Orchestrator CDO Cloud Multi-Device Management, Syslog SNMPv3 Secure Monitoring, Dual-Stack IPv4 / Limited Partial IPv6 Native Support, Application-Aware Hierarchical QoS Bandwidth Scheduling, NEBS / NEBS Level 3 Industrial Telecom Certified, FIPS 140-2 Level 1 Industrial Certified, Still Active Sale & Full Cisco Technical Support, Security Plus K9 Unrestricted Upgrade Over ISA3000-4C DES Base License, Predecessor to Next-Generation ISA Industrial Secure Firewall Series, Power Grid Substation IEC 61850 Compliant OT Security Gateway, Factory Automation Remote SCADA DMVPN IPsec VPN Backhaul DIN-Rail NGFW, Outdoor Extreme Temperature Industrial Kiosk Edge Fanless Firewall, Small Industrial MSP Multi-Tenant Colocation Boundary All-Copper Rugged Security Appliance
Naming Rule Explanation
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ISA: Industrial Security Appliance, Cisco dedicated OT industrial firewall product line for power, automation, transportation and substation environments.
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3000: Product series generation (ISA3000 fanless rugged DIN-rail platform).
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4C / 4P: 4-port all-copper data interface variant (P = marketing shorthand for Copper 4-port SKU; official full PID suffix is C for Copper).
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K9: Premium unrestricted Security Plus license identifier unlocking full DES/3DES/AES strong encryption, expanded concurrent session/VLAN capacity, unlimited TLS proxy sessions, multi-context virtual firewalls and dual-mode Active/Standby + Active/Active stateful failover; contrasted with K8 base DES-only restricted license.
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Hardware Distinction Note: The ISA3000-4C-K9 (market name ISA3000-4P-K9) is the entry all-copper fanless industrial DIN-rail firewall in the ISA3000 lineup, differentiated from fiber-capable ISA3000-2C2F-K9 variant. This platform remains active-sale current Cisco hardware with full ongoing firmware feature development, threat signature updates and official TAC technical support available.
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