Using a Private Address for the EtherNet/IP Port
IP router
● Intranet
● Intranet
Controller
Controller Controller
IP router
Firewall
Explicit message
Explicit message
Ethernet(EtherNet/IP)
Ethernet(EtherNet/IP)
EtherNet/IP port: Private address
● Internet
Communications in intranet
Communications in intranet
Communications in
intranet
Firewall
POWER
PORT2
POWER
PORT2
POWER
PORT2
CIP client on a
computer, such as
Sysmac Studio or
Network Configurator
CIP client on a
computer, such as
Sysmac Studio or
Network Configurator
EtherNet/IP port: Private address EtherNet/IP port: Private address
l
Conditions for Communications Applications
If the EtherNet/IP port uses a private address, you can use explicit message communications serv-
ice under the following conditions.
• The explicit message communications service can be executed on the intranet between Ether-
Net/IP ports with private addresses only
.
• A device such as a personal computer (CIP applications including the Network Configurator)
cannot connect online and communicate over the Internet with an EtherNet/IP port that has a pri-
vate address.
Explicit message communications are also not possible over the Internet between EtherNet/IP
ports with private addresses.
Precautions for Correct Use
• To set up an intranet through a global address involves network security considerations. Be
sure to consult with a network specialist in advance and consider installation of 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.
8 TCP/IP Functions
8-10
NX-series EtherNet/IP Unit User's Manual (W627)
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