Keep Modbus devices safe from malicious traffic.
Introducing PortBloque
The Modbus firewall that filters device IDs and function codes. And much more.
Simple to setup. $495.
Remote Access Security for Industrial Networks
Remote access to industrial networks is a given these days. While Internet connectivity brings a host of benefits, it also makes control devices susceptible to a growing number of cyber attacks. By securing remote access, you’ll keep plant operations safe. Our solutions help build a secure data path from the Internet all the way to your industrial control system.
Serial Encryptor 
     - Advanced Encryption Standard
     - Hash Authentication
     - Supports Modbus/DNP3 links
     - RS-485/422/232

PortBloque S
Modbus Serial Firewall
     - Modbus deep packet inspection
     - Modbus RTU/ASCII
     - RS-485/422/232 interface
     - Can be deployed on top of a perimeter firewall

Protecting Industrial Control Systems 
PortBloque E
Modbus Ethernet Firewall
  • Modbus deep packet inspection
  • Ethernet: 
    • Modbus TCP/UDP
  • Serial: 
    • Modbus RTU/ASCII
    • RS-232/422/485 interface
  • Built-in Modbus Ethernet to serial conversion