Blacklist
Whitelist
Select whether the filter list is a blacklist or a whitelist. A blacklist will prevent all listed
devices from accessing the module and using the radio link. A whitelist will allow
devices with the IP addresses listed to communicate with the module and utilize the
radio link
—all other devices are blocked.
Add Entry
Adds a new row to the table for you to enter a new filter rule.
Delete Entry
Removes the currently selected address filter rule.
Enable
Select this checkbox to enable the rule.
IP Address Min,
IP Address Max
Sets the range of IP addresses that are affected by the rule.
Port Min,
Port Max
When the protocol is set to
“TCP” or “UDP,” this is the range of port addresses to
which the rule applies. When the protocol is set to
“All” or “ICMP,” these settings
have no effect.
Protocol
Select the protocol to which the rule applies. The rule can apply to any protocol (All),
or to only one of TCP, UDP, or ICMP (Ping).
Save Changes
Save changes to non-volatile memory (reset is required to activate).
Save and Activate
Changes
Save to non-volatile memory and restart to activate changes.
ARP Filter
ARP (Address Resolution Protocol) is a broadcast message and is primarily used for identifying MAC addresses
when only the IP address or some other Network layer address is known. Large networks tend to get a high
proportion of broadcast messages. ARP filters are useful for reducing broadcast traffic that is generated on
the wired side of the network from being passed on to the wireless network. This is done by only allowing ARP
requests for the devices that are on the wireless network, or by blocking ARP requests for high-use addresses. This
means that all other ARP requests for devices on the wired network will not be passed over the radio. The WI-MOD-
xxx-E-5W has a reduced throughput compared with other Ethernet modems, and it is very important that
unnecessary traffic
is not broadcast over the radio. Therefore, we highly recommend that you enable and configure ARP filters.
To configure ARP filters, click Filtering from the menu, and then click ARP Filter on the Filtering Configuration
page to display the page in Figure 58.
By far the easiest ARP filter to apply is the whitelist. To create a whitelist, add the IP address for all remote modems
and any device that is connected to these remote radios in the ARP filter table. When complete, make sure the
entries are enabled (select the enable checkbox) and click Save and Activate Changes. After the modem reboots, it
will only pass ARP traffic for the IP addresses configured.
