1 FUNCTIONS
1.13 Security Function
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1.13 Security Function
Security suitable for the network environment can be structured by restricting access by each communication path that
accesses the CPU module.
The security function has the following access restriction methods.
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.
• This setting is not available when the RJ71EN71 network type is set to "Q Compatible Ethernet".
• Access cannot be restricted when the network other than Ethernet is set as the communication path.
Function Description
IP filter function Identifies the IP address of the other device side, and prevents access from an illegal IP address. Access is restricted
by setting to allow or deny access from the IP address (external device) set in the parameters.
Remote password Prevents illegal access of the programmable controller from an external device. The remote password set with the
parameters authorizes (permits) access from an external device, and restricts access from an unauthorized external
device.
Ethernet
Ethernet-equipped module
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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