Bay Technical Associates RM356 Manual De Usuario
Reference Guide for the Model RM356 Modem Router
Filter Configuration
8-9
Reducing Unnecessary Calls by Windows 95
One example of when to apply a filter set is reducing unnecessary calls by Windows 95. When
using Windows 95 with a dial-up router, you may need to make some configuration changes to
avoid having calls placed unnecessarily. Most of these unnecessary calls are caused by PCs on the
LAN trying to perform local NetBIOS name resolution, either in response to a user action
(browsing the Network Neighborhood or turning a PC on or off, for example) or as periodic
background activity. In some cases, this NetBIOS activity can be kept local by other means, such
as configuring a WINS or DNS server on the local network, using an LMHOSTS file to store
addresses of local hosts, or turning off NetBIOS name resolution by DNS. A simpler method is to
filter NetBIOS traffic using the filtering capabilities of your Model RM356 Modem Router.
using Windows 95 with a dial-up router, you may need to make some configuration changes to
avoid having calls placed unnecessarily. Most of these unnecessary calls are caused by PCs on the
LAN trying to perform local NetBIOS name resolution, either in response to a user action
(browsing the Network Neighborhood or turning a PC on or off, for example) or as periodic
background activity. In some cases, this NetBIOS activity can be kept local by other means, such
as configuring a WINS or DNS server on the local network, using an LMHOSTS file to store
addresses of local hosts, or turning off NetBIOS name resolution by DNS. A simpler method is to
filter NetBIOS traffic using the filtering capabilities of your Model RM356 Modem Router.
Diagnosing the Situation
If you already know the source or types of packets that are causing the problem, you can proceed
directly to the design of the filter. Otherwise, you can use a sniffer or the router’s built-in tools to
determine the source. A particularly useful tool is the display in Menu 24.1 of the “LAN Packet
Which Triggered Last Call.”
directly to the design of the filter. Otherwise, you can use a sniffer or the router’s built-in tools to
determine the source. A particularly useful tool is the display in Menu 24.1 of the “LAN Packet
Which Triggered Last Call.”
illustrates the header of the packet that caused an
unwanted call to be placed.
Figure 8-2.
LAN Packet Which Triggered Last Call
LAN Packet Which Triggered Last Call: (Type: IP)
45 00 00 3E 9E 05 00 00 1F 11 CC 9D 8D FB 17 12 CF 45 BC B9 00 89 00 35
00 2A 63 C8 01 85 01 00 00 01 00 00 00 00 00 00 0A 53 41 4E 54 41 43 4C
45 00 00 3E 9E 05 00 00 1F 11 CC 9D 8D FB 17 12 CF 45 BC B9 00 89 00 35
00 2A 63 C8 01 85 01 00 00 01 00 00 00 00 00 00 0A 53 41 4E 54 41 43 4C