Services Modbusgateway
IX20 User Guide
739
l
Asingle IPaddress or host name.
l
Anetwork designation in CIDRnotation, for example, 192.168.1.0/24.
l
any: No limit to IPv4 addresses that can access the web administration service.
d. Click again to list additional IPaddresses or networks.
n
To limit access to specified IPv6 addresses and networks:
a. Click IPv6 Addresses.
b. For Add Address, click .
c. For Address, enter the IPv6 addressor network that can accessthe device's web
administration service. Allowed values are:
l
Asingle IPaddress or host name.
l
Anetwork designation in CIDRnotation, for example, 2001:db8::/48.
l
any: No limit to IPv6 addresses that can access the web administration service.
d. Click again to list additional IPaddresses or networks.
n
To limit access to hosts connected through a specified interface on the IX20 device:
a. Click Interfaces.
b. For Add Interface, click .
c. For Interface, select the appropriate interface from the dropdown.
d. Click again to allow accessthrough additional interfaces.
n
To limit access based on firewall zones:
a. Click Zones.
b. For Add Zone, click .
c. For Zone, select the appropriate firewall zonefrom the dropdown.
See Firewall configuration for information about firewall zones.
d. Click again to allow accessthrough additional firewall zones.
10. (Optional) Enable Send broadcast messagesto configure the gateway to send broadcast
messagesto this client.
11. For Response timeout, typethe maximum time to wait for a response to a message.
Allowed values are between 1 millisecond and 700 milliseconds, and take the format
numberms.
For example, to set Response timeout to 100 milliseconds, enter 100ms. The default is
700ms.
12. Click to expand Modbus address filter.
This filter isused by the gateway to determine if a message should beforwarded to a
destination device. If the Modbus addressin the message matches one or more of the filters,
the message is forwarded. If it doesnot match the filters, the message is not forwarded.
13. For Address or address range, type a Modbusaddressor range of addresses. Allowed values
are 1 through 255 or a hyphen-separated range.
For example, to havethisclient filter for incoming messagesthat contain the Modbusaddress
of 10, type 10. To filter for all messages with addresses in the range of 20 to 30, type 20-30.
To add additional addressfilters for this client, click .
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