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4-20
IM 05P07A01-01EN
4.7 IP Access Restriction Function
The UT75A/UT55A/UT35A/UP55A/UP35A has an IP access control function to permit
access from registered IP addresses and reject access from unregistered IP addresses.
This function is able to prevent unauthorized access and thereby increase security.
Ethernet
connect is permitted
UT75A/UT55A/
UT35A/UP55A/
UP35A with
Ethernet
function
connect( )
connect( )
accect( )
connect request from
a device registered with
the permitted IP address
connect request from a
device not registered with
the permitted IP address
connect is rejected
Use the following parameters to specify the IP access restriction function.
Parameter
symbol
Group
display
Name
Setting range
Menu symbol
Initial value
IPAR
E3
IP access restriction
Disable: OFF (0)
Enable: ON (1)
ETHR
OFF (0)
1.IP1
Permitted IP address 1-1
0 to 255
255
1.IP2
Permitted IP address 1-2
1.IP3
Permitted IP address 1-3
1.IP4
Permitted IP address 1-4
2.IP1
Permitted IP address 2-1
2.IP2
Permitted IP address 2-2
2.IP3
Permitted IP address 2-3
2.IP4
Permitted IP address 2-4
Note: Figures in parentheses “( )” are values to be set when performing communication.
Note
• Just changing the value for the above parameters does not enable the setting content. Be
sure to update the setting content by setting the Ethernet setting switch (ESW) to ON (1)
after the setting is finished. The setting content is also enabled by performing the power ON/
OFF operation of the UT75A/UT55A/UT35A/UP55A/UP35A.
• If the permitted IP address is 255.255.255.255, it is an invalid IP address. Access is not
permitted.
* It takes about 20 seconds for the new settings of the Ethernet communication parameters to be
enabled.
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