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68 CHAPTER 6: ADVANCED CONFIGURATION
WARNING: If you change the IP address and/or the subnet mask, the 56K LAN
Modem will re-initialize itself to work with the new settings. All calls will be
terminated and you may need to reconfigure the IP address(es) of the computer(s)
connected to your 56K LAN Modem. For a LAN using static IP addresses, you must
manually reconfigure the PC’s IP addresses via the PC Parameters window. For a
LAN using dynamic IP addresses, if you have Windows 95 or 98, launch
Winipcfg.exe (probably located in your Windows directory), click Release All and
then click Renew All.
Local Domain Name
The local domain name identifies your LAN. LAN refers to the network created by
the 56K LAN Modem and the devices attached to it.
Enable DHCP Server
The 56K LAN Modem provides DHCP server functionality for the LAN which
automatically assigns a network or IP address to a newly attached PC on your IP
network. If another device on your LAN is providing this functionality, or if you are
using static IP addresses, then you should disable the DHCP server.
Enable NetBIOS Filtering
For Windows Users: NetBIOS is primarily used by Windows 98, 95, and NT for
local file and printer sharing, although it may also be used on other operating
systems. This protocol can make spurious DNS requests which can inadvertently
cause the LAN Modem to establish unwanted calls to your Service Provider,
resulting in subsequent charges to your phone bill. When this box is checked,
NetBIOS packets are prevented from initiating an outgoing call, but they will be
passed if the call is already established. If you have no need to perform file or
printer sharing over your WAN connection, you should enable NetBIOS filtering by
checking the box. Note that enabling the NetBIOS filter will not affect your ability
to share files and printers over your LAN. NetBIOS filtering is disabled by default.
Configuring the LAN
Parameters
To configure LAN parameters, do the following.
1 From the 56K LAN Modem main page, click the LAN Parameters image.
2 In the IP Address field, review the default and enter a different IP address if
required.
3 In the Subnet Mask field, review the default and enter a different subnet mask if
required.
4 In the Local Domain Name field, you may choose to enter a name to identify this
particular LAN on a network. Note that this field is not required. Leave blank if you
are unsure about how to configure a local domain name.
5 Check the Enable DHCP server box to enable it or clear the box to disable it.
WARNING: If you change the IP address and/or the subnet mask of your 56K LAN
Modem, the 56K LAN Modem will re-initialize itself when you submit the changes
by clicking Submit. When the re-initialization occurs, all calls are terminated, and
you may have to reconfigure the IP addresses on the computers on the LAN.
6 In the Enable NetBIOS filtering field, if desired, check the box to enable filtering.
7 Click Submit.