Omron NX Series User Manual page 129

Using a Global Address for the EtherNet/IP Port
Communications
over Internet
Intranet
Global address
IP router
Private address
Firewall
Communications
in intranet
l Conditions for Communications Applications
You can use the explicit message communications service over the Internet under the following
conditions.
• A device such as a personal computer (a CIP application including the Network Configurator)
can connect online and communicate over the Internet with an EtherNet/IP port that has a global
address.
• The TCP port number (44818) or UDP port number (44818) that is used for EtherNet/IP cannot
be used because it is prohibited by a firewall in the communications path.
Precautions for Correct Use
• To set a global IP address for an EtherNet/IP port involves network security considerations. It
is recommended that the user contract with a communications company for a dedicated line,
rather than for a general line such as a broadband line. Also, be sure to consult with a net-
work specialist and consider security measures such as a firewall.
• Some communication applications may not be available depending on the firewall settings
made by the communications company. If there are communication applications that cannot
be used, be sure to check with your communications company.
• When sending and receiving data over a global address, use secure communications, such
as secure socket communications and OPC UA, that ensure confidentiality and integrity.
NX-series EtherNet/IP Unit User's Manual (W627)
Intranet
CIP client on a computer,
such as Network
Configurator
Ethernet (EtherNet/IP)
Firewall
IP router
Internet
Global address
Ethernet (EtherNet/IP)
Controller
POWER
PORT2
EtherNet/IP port: Global address
Private address
Cannot connect to Internet
(required)
Cannot connect to Internet
Private address
8 TCP/IP Functions
8-11
8