iSEG RF-1031 Secure Gateway

Designed for small remote sites that require a secure connection to a limited number of devices


The iSEG RF-1031 Secure Gateway was designed for small remote sites that require a secure connection to a limited number of devices. It offers security solutions for both M2M (Machine to Machine) and H2M (Human to Machine) traffic by incorporating a DPI (Deep-Packet Inspection) firewall, as well as a user-identity firewall.

The iSEG RF-1031 includes a distributed DPI firewall or monitoring all network traffic and managing physical and remote access control systems. The whitelist-based firewall is installed at every port for both Serial and Ethernet traffic. Each SCADA protocol packet is validated by the firewall for source, destination, protocol and packet content. The firewall’s two states (Monitoring and Blocking) allow blocking suspicious traffic or just monitoring, in addition to triggering an alarm at the control center.

The iSEG RF-1031 supports VPN tunnels for secure inter-site connectivity with IPsec, DMVPN, mGRE tunnels (among others) with key management certificates, supporting layer-3 services. In addition, the iSEG RF-1031 fully supports L3 switches (VLANs, Routing, etc.) for Ethernet and serial ports.

The iSEG RF-1031 offers a built-in APA (Authentication Proxy Access), for compliance with the NERC CIP V6 requirement for identifying and granting privileges to users prior to granting network access. Once validated, specific access is granted to predefined devices and functions, and each operation is logged. The iSEG RF-1031 is also integrated with a physical identity server system, for other authentication methods (e.g. magnetic card.)


Authentication Proxy

Compliance with NERC CIP V6 via APA (Authentication Proxy Access) for network access management

IP SCADA firewall

DPI firewall or monitoring all network traffic and managing physical and remote access control systems

Secure VPN Connectivity

Communication with central site via IPsec VPN over cellular & fiber with X.509 certificates

Resilient network uplink

Connectivity via LAN or Cellular Modem with dual SIM for HSPA +/ LTE CDMA 450MHz

SCADA protocols gateway

Validation by the firewall for source, destination, protocol and packet contentty

Fit for Harsh Environments

Radiflow’s iSEG 1031 was designed for operation under harsh temperature and radiation conditions



Distributed DPI Firewall

  • Profile-based firewall
  • Security rules planning per service group
  • Firewall modes: Monitoring, Enforcement
  • IEC 104 DPI Firewall
  • Modbus TCP DPI Firewall
  • DNP3 TCP DPI Firewall
  • S7 TCP DPI Firewall


  • IPsec Certificates X.509
  • IPsec Dynamic Key Exchange
  • IPsec encryption AES, 3DES
  • L3 IPSec VPN policy based L3
  • IPSec VPN route based
  • L3 mGRE DM-VPN

Access control

  • Access Lists L3, L4
  • NAT
  • User-based/Task-based access
    control for local devices via local APA
    (Authentication Proxy Access)
  • OS image encryption


  • RS-232 Console Port
  • Local USB Port for Emergency Boot
  • Discrete outputs for reporting system alarms Failsafe output relay for reporting critical alarms


  • 1 or 2 x RS-232 RJ45 Serial port
  • 1 x RS-485 RJ-45 Serial port
  • 1 x 10/100TX RJ-45 Ethernet port
  • 1×100/1000 SFP Ethernet port
  • Cellular Modem with dual SIM for HSPA +/ LTE CDMA 450MHz
  • Discrete lines: 2 In, 2 Out
  • Console


  • DIN rail mounting, optional wall mount
  • Rugged enclosure – IP 30
  • Fanless, self-cooling
  • Wide range of ambient temperature: min. -40°C, max +70°C (-40°F to +158°F)
  • Storage Temperature: min -40°C, max +85°C
  • Operating humidity up to 90%
  • Dimensions (HxWxD) 106 x 44.7 x 120mm
  • Power consumption: 9W
  • Power supply 9-60V
  • DC IEC 61850-3 conformance
  • MTBF 25 years

  • Console serial port
  • Backup/Restore running config
  • Conditioned/scheduled system reboot
  • Remote management and upgrade
  • TFTP/SFTP Client
  • Safe Mode
  • Syslog


  • Protection over wired and cellular connections
  • Protection between Cellular ISPs (SIM cards backup)
  • Conditioned/scheduled system reboot



  • SCADA gateway IEC 101/104 and DNP3
  • Terminal Server Byte/Frame modes
  • Serial transparent tunneling byte mode


  • Static routing
  • OSPF v2
  • IPv4


  • Auto Crossing
  • Auto Negotiation IEEE 802.3ab
  • VLAN Tagging


  • Local Time settings
  • SNTP


  • Counters & statistics per Port
  • LED diagnostics
  • Ping
  • RMON
  • DDM