Chapter 11 Security Function; Ip Filter Function - Mitsubishi Electric FX5 User Manual
Melsec iq-f series, ethernet communication
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- Programming manual (1112 pages) ,
- User manual (958 pages) ,
- Reference manual (44 pages)
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11
SECURITY FUNCTION
11.1
IP Filter Function
Identifies the IP address of the access source, and prevents access from an illegal IP address.
The IP address of the external device to be allowed or denied is set in the parameters, and access from external devices is
restricted.
Use of this function is recommended when using in an environment connected to a LAN line.
CPU module
The IP filter function is one method of preventing illegal access (such as program or data destruction) from an
external device. It does not completely prevent illegal access. Incorporate measures other than this function if
the programmable controller system's safety must be maintained against illegal access from an external
device. Mitsubishi shall not be held liable for any system problems that may occur from illegal access.
Examples of measures for illegal access are given below.
• Install a firewall
• Install a personal computer as a relay station, and control the relay of send/receive data with an application
program
• Install an external device for which the access rights can be controlled as a relay station (Contact the
network provider or equipment dealer for details on the external devices for which access rights can be
controlled.)
11 SECURITY FUNCTION
130
11.1 IP Filter Function
Ethernet
Access permitted
Access permitted
Access prohibited
External device
IP address: 192.168.1.2
External device
IP address: 192.168.1.3
External device
IP address: 192.168.1.5
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