Security; Ip Filter - Mitsubishi Electric RD78G4 User Manual

1.4

Security

Security for the network environment is structured by restricting access by each communication path that accesses the CPU
module. The following two access restriction methods can be used.
Page 23 IP filter
Page 25 Remote password

IP filter

Identifies the IP address of the access source, and prevents unauthorized access and data links.
By setting the IP address of the access source using the engineering tool, IP packets are allowed or blocked. (Allows or
blocks the IP packets received from the access source. 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
When the "Allow" IP address is 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.
This function cannot be used when accessing via a network other than Ethernet or CC-Link IE TSN.
The IP filter is one method of preventing unauthorized access (such as program or data destruction) from an
external device. It does not completely prevent unauthorized access. Incorporate measures other than this
function if the programmable controller system's safety 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 given below.
• Install a firewall
(1) 192.168.1.1
HUB
(2) 192.168.1.5
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1 FUNCTIONS
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1.4 Security