START WHERE YOU ARE. SCALE HOW YOU WANT.

Compare secure connectivity gateways

All three secure remote connectivity options run on ei³’s Cyber-Physical System Protection Platform. Choose the approach that fits your current reality—hardware, virtual, or legacy upgrade—then scale on your terms.

  • Amphion | Hardware Gateway

    Build a secure edge foundation for new machines, lines, or sites.

    Learn more
  • Zethus | Virtual Gateway

    Add edge capability without hardware using Docker on your existing controls.

    Learn more
  • Portara | Legacy Upgrade

    Secure what you already have by centralizing and standardizing remote access.

    Learn more
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Amphion

Build a secure edge foundation for new machines with industrial-grade hardware.


  • Industrial hardware with DIN-rail mounting. Made in the USA
  • Flexible deployment: Facility, Machine, all-in-one
  • Local buffering and high-frequency data capture with edge-analytics options
  • Broad protocol and PLC coverage, including legacy controls
  • Scales from a single machine to site-wide and multi-site fleets

Best for new machines and lines without an edge device

Zethus

Add edge capability without hardware—a software-only gateway for existing controls.


  • Software container (Docker) on compatible Linux controls or IPCs
  • Acts as a virtual Red-box router with micro-segmentation
  • Template-based rollout for fast scaling across lines and regions
  • Light footprint running alongside workloads
  • Delivers remote service, management, and data collection comparable to hardware

Best for sites with modern controls or local compute

Portara

Secure what you already have—centralize and standardize legacy remote access.


  • Facility anchor that consolidates existing entry points into one managed path
  • Centralized request, approval, and monitoring in SERVICE
  • Per-machine zones, consistent policies across vendors and plants
  • Session recording with exportable audits; SSO & SIEM
  • Keep current devices and networks, then phase in upgrades

Best for securing legacy remote access

Many customers mix and match—e.g., Amphion for new installs, Zethus where compute exists, Portara to standardize legacy access across sites.

Protocol coverage

Connect to 30+ industrial protocols and all major controller families (new and legacy), including OPC UA, EtherNet/IP, and Modbus TCP.

 

Not sure about a specific controller or firmware? Send your PLC list and we’ll verify fit in minutes.

Common rollout patterns

New line or plant: Amphion today → add Zethus where compute is available.

Modern controls, no cabinet space: Zethus across machines → Amphion at sites that need a facility anchor.

Legacy estate:
Portara to standardize & audit → selective upgrades to Amphion or Zethus over time.

All ei³ Gateways include

  • Zero Trust Network Access for every connection

  • Automatic security updates & patches

  • Complete session visibility & audit trails

  • Centralized technician documentation

  • Machine fleet mapping & health view

  • SSO / Active Directory options

  • SIEM integration options

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