EDR-G903 Series

Features and Benefits

  • Firewall/NAT/VPN/Router all-in-one
  • Secure remote access tunnel with VPN
  • Stateful firewall protects critical assets
  • Inspect industrial protocols with PacketGuard technology
  • Easy network setup with Network Address Translation (NAT)
  • Dual WAN redundant interfaces through public networks
  • Support for VLANs in different interfaces
  • -40 to 75°C operating temperature range (-T model)
  • Security features based on IEC 62443/NERC CIP


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The EDR-G903 is a high-performance, industrial VPN server with a firewall/NAT all-in-one secure router. It is designed for Ethernet-based security applications on critical remote control or monitoring networks, and it provides an Electronic Security Perimeter for the protection of critical cyber assets such as pumping stations, DCS, PLC systems on oil rigs, and water treatment systems. The EDR-G903 Series includes the following cybersecurity features:

  • Virtual Private Network (VPN): VPNs are designed to provide users with secure communication links when accessing a private network from the public Internet. They use IPsec (IP Security) server or client mode for encryption and authentication of all IP packets at the network layer to ensure confidentiality and sender authentication.

  • Firewall: Controls network traffic between different trust zones. Network Address Translation (NAT), which shields the internal LAN from unauthorized activity from outside hosts.

The EDR-G903’s Quick Automation Profile function supports most common fieldbus protocols, including EtherCAT, EtherNet/IP, FOUNDATION Fieldbus, Modbus TCP, and PROFINET. Users can easily create a secure Ethernet Fieldbus network from a user-friendly web UI with a single click. In addition, Moxa’s PacketGuard technology (Deep Packet Inspection) helps to filter Modbus TCP commands at OSI layer 7. The wide-temperature range models that are available operate reliably in hazardous, -40 to 75°C environments.


Input/Output Interface
Alarm Contact Channels 1 relay output with current carrying capacity of 1 A @ 24 VDC
Buttons Reset button
Digital Input Channels +13 to +30 V for state 1
-30 to +3 V for state 0
Relay Channels
Ethernet Interface
Combo Ports (10/100/1000BaseT(X) or 100/1000BaseSFP+) 3
Standards IEEE 802.1Q for VLAN Tagging
IEEE 802.3 for 10BaseT
IEEE 802.3ab for 1000BaseT(X)
IEEE 802.3u for 100BaseT(X) and 100BaseFX
IEEE 802.3x for flow control
IEEE 802.3z for 1000BaseSX/LX/LHX/ZX
WAN Ports, RJ45/Fiber Combo Port 1
DMZ Ports, RJ45/Fiber Combo Port 1
LAN Ports, RJ45/Fiber Combo Port 1
Ethernet Software Features
Management Back Pressure Flow Control, DDNS, DHCP Server/Client, HTTP, LLDP, QoS/CoS/ToS, SMTP, SNMPv1/v2c/v3, Telnet, TFTP
Routing Throughput: 40,000 packets per second (max. 500 Mbps)
Routing Redundancy VRRP
Security HTTPS/SSL, SSH, IPsec, OpenVPN (client and server), UDP and TCP Tunnel mode (routing) and TAP mode (bridge), L2TP (server), RADIUS
Time Management NTP Server/Client, SNTP
Unicast Routing OSPF, RIPV1/V2, Static Route
Switch Properties
Max. No. of VLANs 15
DoS and DDoS Protection
Technology ARP-Flood, FIN Scan, ICMP-Death, NEWWithout-SYN Scan, NMAP-ID Scan, NMAP-Xmas Scan, Null Scan, SYN/FIN Scan, SYN/RST Scan, SYN-Flood, Xmas Scan
Deep Packet Inspection Modbus TCP
Modbus UDP
Filter DDoS, Ethernet protocols, ICMP, IP address, MAC address, Ports
Quick Automation Profiles DNP, EtherCAT, EtherNet/IP, FOUNDATION Fieldbus, FTP, HTTP, IEC 60870-104, IPsec, L2TP, LonWorks, Modbus TCP, PPTP, PROFINET, RADIUS, SSH, Telnet
Stateful Inspection Router firewall
Transparent (bridge) firewall
Throughput Max. 40000 packets per second (max. 500 Mbps)
Authentication MD5 and SHA (SHA-256)
RSA (key size: 1024-bit, 2048-bit)
X.509 v3 certificate
Concurrent VPN Tunnels Max. 100 IPsec VPN tunnels
Encryption 3DES, AES-128, AES-192, AES-256, DES
Protocols IPsec, L2TP (server), PPTP (client)
Throughput Max. 150 Mbps (Conditions: AES-256, SHA-256)
Features 1-to-1, N-to-1, Port forwarding
Authentication User password by MD5 and SHA1
Concurrent VPN Tunnels Client Mode: max. 2 external servers
Server Mode: max. 5 external clients
Encryption AES-128/192/256 CBC, Blowfish CBC, DES CBC, DES-EDE3 CBC
Protocols OpenVPN (client and server), UDP, and TCP, Tunnel mode (routing) and TAP mode (bridge), Tunnel mode (routing)
Real-Time Firewall / VPN Event Log
Event Type Firewall event, System event, VPN event
Media Local storage, SNMP Trap, Syslog server
Serial Interface
Console Port Web/Telnet/SSH/CLI, and RS-232 serial console
Environmental Limits
Operating Temperature EDR-G903: 0 to 60°C (32 to 140°F)
EDR-G903-T: -40 to 75°C (-40 to 167°F)
Storage Temperature (package included) -40 to 85°C (-40 to 185°F)
Ambient Relative Humidity 5 to 95% (non-condensing)
Standards and Certifications
Freefall IEC 60068-2-32
EMC EN 55032/24
EMI CISPR 32, FCC Part 15B Class A
EMS IEC 61000-4-2 ESD: Contact: 6 kV; Air: 8 kV
IEC 61000-4-3 RS: 80 MHz to 1 GHz: 10 V/m
IEC 61000-4-4 EFT: Power: 4 kV; Signal: 4 kV
IEC 61000-4-5 Surge: Power: 2 kV; Signal: 1 kV
IEC 61000-4-6 CS: 10 V
IEC 61000-4-8 PFMF
Safety UL 508
Shock IEC 60068-2-27
Vibration IEC 60068-2-6
Power Substation IEC 61850-3
Time 903,311 hrs
Standards Telcordia (Bellcore), GB
Warranty Period 5 years
Details See www.moxa.com/warranty