Mitsubishi Electric RD78G4 User Manual page 26

Setting method
1.
Set the IP address to be allowed or blocked in the "IP Filter Settings" window of "Security" under "Application Settings".
(Page 41 Security) A warning is displayed in the following cases.
• When blocking the IP address of the slave station set in "Network Configuration Settings" under "Basic Settings" was
attempted
• When the slave station is not set in "Network Configuration Settings" under "Basic Settings", and the "Allow" target IP
address is not set in the "IP Filter Settings" window (because the IP filter is fully blocked)
2.
Write the module parameters to the CPU module.
3.
The IP filter is enabled when the CPU module power is turned off and on or reset.
Even if the connection was specified in "Network Configuration Settings" under "Basic Settings" or by a
program, access from the external device is either allowed or blocked according to the setting in the "IP Filter
Settings" window.
Setting Target
Allow or block should be set to all IP addresses that connect to the same network. Also, set allow or block to the IP address of
the slave station that is registered in "Network Configuration Settings" under "Basic Settings".
Register the setting details to the master station, and allow or block the IP packets received from the slave station of the
registered IP address.
Operation
Even for the slave station registered in "Network Configuration Settings" under "Basic Settings", a station with an IP address
set as blocked can become a disconnected station. As a result, cyclic transmission and transient transmission are not
performed. Such a station is also displayed as a disconnected station on the "CC-Link IE TSN/CC-Link IE Field Diagnostics"
window. However, Ethernet devices are not displayed on the "CC-Link IE TSN/CC-Link IE Field Diagnostics" window. (
Page 54 CC-Link IE TSN/CC-Link IE Field Diagnostics)
When an IP packet is received from an IP address that is set as blocked, the denial is registered in the event history of the
master station.
( Page 84 Event List)
Precautions
• Do not set the IP addresses of the master station or slave stations as blocked. When a slave station using line topology is
set as blocked, cyclic and transient transmissions cannot be performed on the slave stations that are connected after the
slave station set as blocked.
No.0
When the "Deny" IP address is set to 192.168.1.2 using the IP filter of the master station No.0:
Only the slave station No.1 can access the master station, and the slave station No.2 and slave station No.3 cannot access the master station.
• If there is a proxy server in the LAN line, block the IP address for the proxy server. If the IP address is allowed, it will not be
possible to prevent access from personal computers that access the proxy server.
• To block access from an external device to another station, block access to the connected station (station connected
directly to an external device) by using the IP filter.
1 FUNCTIONS
24
1.4 Security
No.1: 192.168.1.1 No.2: 192.168.1.2
No.3: 192.168.1.3