- NetComm Modem Router User Guide

46 NB9/NB9W ADSL2+ VoIP Router

YML790 Rev8

Advanced > LAN

Conﬁgure the NB9/NB9W’s LAN IP address and subnet mask. Save button only saves the LAN conﬁguration

data. Save/Reboot button saves the LAN conﬁguration data and reboots the NB9/NB9W to make the new

conﬁguration effective.

Field Means

LAN IP Address

Default: 192.168.1.1. The LAN IP address of your NB9/NB9W.

LAN Subnet Mask

Default: 255.255.255.0. The subnet mask of your NB9/NB9W. A subnet mask is used to

determine what subnet an IP address belongs to. For more information on subnetting see

http://www.ralphb.net/IPSubnet/.

Enable UPnP

Universal plug and play (UPnP) allows trafﬁc to pass through the NB9/NB9W for applications

using the UPnP protocol. This feature requires one active WAN connection. In addition, the

client connecting to the NB9/NB9W should support this feature.

UPnP also supports NAT Traversal which can automatically solve many NAT-related

communications problems. UPnP enables applications to assign dynamic port mappings to

the NB9/NB9W and delete them when connections are complete.

A typical example is the MSN Messenger application that runs on Windows. Instead of

manually setting up the port mappings UPnP enables MSN Messenger to make the request

to the NB9/NB9W which will setup these ports dynamically. When MSN Messenger is closed

the port openings will be removed from the NB9/NB9W’s conﬁguration.

Conﬁgure the second IP address and subnet mask for LAN interface. It is possible to

conﬁgure the second IP address to access the NB9/NB9W on. Once this box is checked you

are able to enter the IP address and subnet mask.

Disable DHCP Server

Disables the DHCP server. Only to be done if Static IP address is set up.

Enable DHCP Server

Default: Enabled.

Start IP Address

Default: 192.168.1.2. The ﬁrst IP address that will be issued to the ﬁrst DHCP client

connecting to the NB9/NB9W using Ethernet cable or wirelessly.

End IP Address

Default: 192.168.1.254. The last IP address in the DHCP pool to be issued to DHCP clients

connecting to the NB9/NB9W.

Lease Time

Default: 24 hours. The time an IP address is assigned to a client before being renewed.