Security; Ip Filter - Mitsubishi Electric MELSEC iQ-F FX5 Series User Manual

3.5

Security

This function ensures security according to the network environment by restricting access for each communication path to the
CPU module. The following two access restriction methods can be used.
Page 43 IP filter
Page 45 Remote password

IP filter

This function identifies the IP address of the access source, and prevents unauthorized access.
By setting the IP address of the access source using the engineering tool, IP packets are allowed or blocked. (The IP packets
received from the access source are allowed or blocked. IP packets sent from the own station are ignored.)
Use of this function is recommended when using in an environment connected to a LAN line.
No.0 Switching hub
When the "Allow" IP addresses are set to 192.168.1.1 using the IP filter of the master station No.0:
Only the Ethernet device (1) can access the master station, and the Ethernet device (2) cannot access the master station.
The IP filter is one method of preventing unauthorized access (such as a program or data destruction) from an
external device. It does not completely prevent unauthorized access. Take appropriate measures other than
this function if the safety of the programmable controller system must be maintained against unauthorized
access from an external device. Mitsubishi shall not be held liable for any system problems that may occur
from unauthorized access.
Examples of measures for unauthorized access are as follows.
• Install a firewall.
(1) 192.168.1.1
(2) 192.168.1.5
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3.5 Security