User manual

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Cooper Bussmann 245U-E Wireless Ethernet Modem & Device Server User Manual

63Rev Version 2.19

Figure 66 Filtering Example

NOTE If an erroneous conﬁguration has prevented all access to the module, SETUP mode can be used to

restore operation.

MAC Address Filter Configuration

MAC addresses are uniquely assigned to each device and therefore can be used to permit or deny network access

to specific devices through the use of blacklists and whitelists. In theory, MAC filtering allows a administrators to

permit or deny network access to hosts associated with the MAC address, though in practice there are methods

to circumvent this form of access control through address modification. The MAC filter entry will match only the

source MAC address in the packet.

NOTE It is important to add the MAC address of the conﬁguration PC when creating a whitelist. If the

conﬁguration PC is not on the whitelist, it will be unable to communicate with the module for further

conﬁguration.

Select “Blacklist” or

“Whitelist”

Blacklist will prevent all listed devices from accessing the module and using

the radio link. Whitelist will allow devices with the MAC addresses listed to

communicate with the module and utilize the radio link. All other devices are

blocked.

Add Entry Add a row to the table of Mac address filter rules.

Delete Entry Delete the currently selected MAC address filter rule.

Enable Select this checkbox to enable the rule.

Mac Address Enter the desired source MAC address.

Save Changes Save changes to non-volatile memory (reset is required to activate).

Save Changes and

Reset

Save to non-volatile memory and restart to activate changes.

IP Address Filter Configuration

The IP filter can be used to permit or deny network access to specific devices through the use of blacklists

(blocking of traffic that matches a rule) and whitelists (allowing traffic that matches a rule). The IP filter entry will

match either source or destination address in the packet. That is, if either the source or destination IP address falls

within the address range specified in the rule, the packet is matched and will be discarded (blacklist) or allowed

(whitelist).

If the protocol is specified, the protocol of the packet must also match. If the protocol is TCP or UDP, the source or

destination TCP/UDP can also be inspected. If the IP address and protocol matches and the source or destination

port number falls within the range specified, the packet is matched.

NOTE Conﬁguration pages use TCP protocol on ports 80 and 443. Create whitelist rules specifying the

conﬁguration PC’s IP address, with TCP protocol, ports 80 and 443.