Remote Password - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

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.)
Setting procedure
1.
Set the IP address to be allowed or denied in "IP Filter Settings" of "Security" under "Application Settings". ( Page
263 IP Filter Settings)
2.
Write the module parameters to the CPU module.
3.
The IP filter function is enabled when the CPU module power is turned off and on or reset.
Even if the connection is established as set with the Ethernet-equipped module's "External Device
Configuration" under "Basic Settings" or the program, access from the external device is either allowed or
denied following "IP Filter Settings" of "Security" under "Application Settings".
Therefore, if the IP address set in the Ethernet-equipped module's "External Device Configuration" under
"Basic Settings" is set to be denied with "IP Filter Settings" of "Security" under "Application Settings", the IP
filter function is enabled and communication with the external device is denied.
Precautions
If there is a proxy server in the LAN line, deny 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.

Remote password

Permits or prohibits access from the external device to the CPU module via the Ethernet-equipped module. This function can
prevent illegal access of the CPU module from a remote location.
The remote password 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.)
1 FUNCTIONS
174
1.13 Security Function