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Cooper Bussmann 245U-E Wireless Ethernet Modem & Device Server User Manual
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Rev Version 2.19
destination IP address is 0, it specifies a network address. Consequently, any traffic received at the access point
with destination IP address 169.254.109.x (where x is any host ID) will be forwarded to the 245U-E at LAN B.
Devices on LAN B and LAN C that need to send messages back to LAN A will need to have their gateway
addresses directed to the 245U-E on their respected networks (for example, a LAN B device needs to send data
back to LAN A). The gateway address will need to be configured as 169.254.109.40 because this is the IP address
of the wired side of the LAN B 245U-E. Any message coming in with a 192.168.0.X IP address will be directed
across the wireless interface to LAN A.
The Routing Rules configuration page can be accessed by selecting the “Routing” link on any of the configuration
webpages. Up to 30 routing rules may be added to each 245U-E.
Figure 64 Routing Rules
The table below summarizes the configurable parameters of a routing rule.
Name
A name that describes the routing rule (maximum 32 characters).
Destination
The destination network (or host) IP address. To specify a network address, set
the host address to 0. For example, an IP address 192.168.0.0 with netmask
255.255.255.0 would specify a destination network, while 192.168.0.16 specifies a
destination host.
Subnet Mask
The subnet mask for the destination network.
Gateway
The IP address of the next-hop router for the specified destination.
Enabled
Select this checkbox to enable the rule. You can clear the box to disable a routing
rule without needing to re-enter the information at a later time.
NOTE Entering dedicated Ethernet routes can also be added to the wired Ethernet LAN in place of
generating or adding routing rules into the modems.
3.19 Filtering
When configured as a bridge, the 245U-E will transmit all broadcast messages appearing at its wired Ethernet
port. When the 245U-E is configured as a router, this does not occur. In many cases, the intended recipient of the
broadcast traffic does not lie at the opposite end of a proposed radio link. Reducing unnecessary broadcast traffic
sent over the radio link will increase available bandwidth for data. The 245U-E has a filtering feature to help reduce
unnecessary wireless transmissions and enhance security.
The 245U-E may be configured to reject or accept messages to and from certain addresses. To accept wireless
messages from particular devices a “whitelist” of addresses must be made. Alternatively, to reject messages from
particular devices, a “blacklist” of addresses must be made. Filtering applies only to messages appearing at the
wired Ethernet port of the configured 245U-E.
The Filter comprises of three lists—MAC Addresses, IP address/protocol/port, and ARP Filters. Each list may be
set as either a blacklist (to block traffic for listed devices and protocols), or as a whitelist (to allow traffic for listed
devices and protocols).
