Mitsubishi Electric MELSEC iQ-R Series User Manual page 192

The IP filter is one method of preventing illegal access (such as program or data destruction) from an external
device. It does not completely prevent illegal access. To maintain the security (confidentiality, integrity, and
availability) of the programmable controller and the system against unauthorized access, denial-of-service
(DoS) attacks, computer viruses, and other cyberattacks from external devices, take appropriate measures
such as firewalls, virtual private networks (VPNs), and antivirus solutions.
Our company is not responsible for any problems that occur in the programmable controller and system due to
a DoS attack, unauthorized access, computer virus, or other cyber attacks.
Examples of measures for unauthorized access are given below.
• Install a firewall or VPN.
• 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.)
9 FUNCTIONS
190
9.5 Security