Cisco ISA-3000-2C2F-K9 — Cisco ISA3000 4-Port Industrial Firewall
What it is
ISA-3000-2C2F-K9 is a Cisco ISA3000 Series industrial firewall appliance built to protect operational technology (OT) and industrial Ethernet networks.
It provides 4 physical network ports (2 × copper and 2 × fiber — depending on model optics), industrial-rated hardware, and Cisco’s Secure Firewall feature set — ideal for perimeter protection, segmentation, and secure access in harsh or remote industrial environments.
Why buyers pick ISA-3000-2C2F-K9 (plain English)
Industrial hardened security
Designed to operate reliably in industrial environments (wide temperature, vibration, dust) while delivering enterprise-grade firewall protection.
Strong segmentation and control
Enables secure network segmentation between OT/IT zones, with access control, stateful inspection, and policy enforcement to prevent lateral spread of threats.
Mixed port connectivity
With both copper and fiber physical interfaces, it adapts to plant floors, remote sites, and industrial backbones using different media.
Cisco Secure Firewall features
Supports key protections like zone-based firewall policies, NAT, VPN termination, threat prevention (with appropriate licensing), and logging.
Compact and efficient
Small form factor fits limited rack or panel space typical of industrial and edge environments.
60-second spec box (ISA-3000-2C2F-K9)
Device type
Industrial firewall appliance
Ports (typical)
4 × Network interfaces
• 2 × 10/100/1000 BASE-T (copper)
• 2 × 1G fiber (SFP)*
Throughput
Platform-dependent — designed for small to mid-sized industrial segments
Security features
Stateful firewall, VPN termination, NAT, ACLs, zoning, basic threat protections with proper licensure
Operating system
Cisco Secure Firewall OS (Firepower/ASA family depending on SKU/feature pack)
Form factor
Industrial enclosure (DIN/panel mount options)
Use case
OT/ICS perimeter defense, secure segmentation, remote site protection
*Port media type may vary with model; fiber SFP modules may be user-installed.
Where it fits (and when to choose something else)
Perfect for:
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Industrial and operational environments (manufacturing, utilities, transportation)
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Segmentation of OT from IT networks
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Remote site edge security
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Networks needing mixed copper/fiber connectivity for hardened firewalls
Choose something else if:
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You need higher throughput/advanced threat capabilities → Cisco 4100/9300 security appliances
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You want integrated IPS/advanced threat → add Firepower or SecureX licensing/features
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You need very high port density → larger rackmount firewall platforms
TL;DR
ISA-3000-2C2F-K9 is a Cisco ISA3000 Series 4-port industrial firewall:
a rugged, compact security appliance that delivers enterprise firewall protections with mixed copper + fiber connectivity for industrial and edge network deployments.
