8-2
Default States of TCP/UDP Ports and
the Changing Procedure
The following table shows the applications that use TCP/UDP ports for which a user can change the
port state, port numbers, default port states, usages, and how to change a port from open to close and
close to open.
Refer to A-7 TCP/UDP Port Numbers Used for the NX-series EtherNet/IP Unit on page A-55 for infor-
mation on all TCP/UDP ports of the NX-series EtherNet/IP Unit.
Application
UDP
port
num-
ber
TCP
port
num-
ber
De-
fault
port
state
Usage
How to change from
open to close
How to change from
close to open
SNMP 161 --- Close Used when
using the
SNMP agent.
On the Sysmac Studio,
select EtherNet/IP Port
Settings - SNMP
Settings, and then se-
lect Do not use for
SNMP service.
On the Sysmac Studio,
select EtherNet/IP
Port Settings
-
SNMP
Settings, and then se-
lect Use for SNMP
service.
HTTPS serv-
er
--- 443 Open Used for com-
munications
with the Sys-
mac Studio.
Use the Packet Filter.
*1
Use the Packet Filter.
Sysmac Stu-
dio
9600 --- Open Used for com-
munications
with the Sys-
mac Studio.
Use the Packet Filter.
*2
Use the Packet Filter.
CIP messag-
es
44818 44818 Open Used for the
CIP messag-
es.
On the Sysmac Studio,
select EtherNet/IP Port
Settings - CIP
Settings, and then se-
lect Do not use for CIP
Message Server.
On the Sysmac Studio,
select EtherNet/IP
Port Settings
-
CIP
Settings, and then se-
lect Use for CIP
Message Server.
*1. Closing the port may prevent communications with the Sysmac Studio and the NA-series HMI. Refer to
Troubleshooting when support software cannot go online in the NJ/NX-series Troubleshooting Manual (Cat.
No. W503) on how to make corrections.
*2. Closing the port may prevent communications with the Sysmac Studio. Refer to Troubleshooting When You
Cannot Go Online from the Sysmac Studio in the NJ/NX-series Troubleshooting Manual (Cat. No. W503) on
how to make corrections.
8 TCP/IP Functions
8-12
NX-series EtherNet/IP Unit User's Manual (W627)