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Page 151 / 424 Scroll up to view Page 146 - 150
Chapter 6 Wireless
P-2612HNU-Fx User’s Guide
151
•
When you use the PBC method, there is a short period (from the moment you
press the button on one device to the moment you press the button on the
other device) when any WPS-enabled device could join the network. This is
because the registrar has no way of identifying the “correct” enrollee, and
cannot differentiate between your enrollee and a rogue device. This is a possible
way for a hacker to gain access to a network.
You can easily check to see if this has happened. WPS works between only two
devices simultaneously, so if another device has enrolled your device will be
unable to enroll, and will not have access to the network. If this happens, open
the access point’s configuration interface and look at the list of associated
clients (usually displayed by MAC address). It does not matter if the access
point is the WPS registrar, the enrollee, or was not involved in the WPS
handshake; a rogue device must still associate with the access point to gain
access to the network. Check the MAC addresses of your wireless clients
(usually printed on a label on the bottom of the device). If there is an unknown
MAC address you can remove it or reset the AP.
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Chapter 6 Wireless
P-2612HNU-Fx User’s Guide
152
Page 153 / 424
P-2612HNU-Fx User’s Guide
153
C
HAPTER
7
Home Networking
7.1
Overview
A Local Area Network (LAN) is a shared communication system to which many
computers are attached. A LAN is usually located in one immediate area such as a
building or floor of a building.
The LAN screens can help you configure a LAN DHCP server and manage IP
addresses.
7.1.1
What You Can Do in this Chapter
•
Use the
LAN
IP
screen to set the LAN IP address, subnet mask, and DHCP
settings (
Section 7.2 on page 157
).
•
Use the
DHCP Server
screen to configure the DNS server information that the
ZyXEL Device sends to the DHCP client devices on the LAN (
Section 7.3 on page
158
).
•
Use the
UPnP
screen to enable UPnP (
Section 7.4 on page 160
).
•
Use the
File Sharing
screen to enable file-sharing server (
Section 7.5 on page
161
).
•
Use the
Media Server
screen to enable or disable the sharing of media files
(
Section 7.6 on page 163
).
•
Use the
Printer Server
screen to enable the print server (
Section 7.7 on page
164
).
DSL
LAN
Page 154 / 424
Chapter 7 Home Networking
P-2612HNU-Fx User’s Guide
154
7.1.2
What You Need To Know
The following terms and concepts may help as you read this chapter.
7.1.2.1
About LAN
IP Address
Similar to the way houses on a street share a common street name, so too do
computers on a LAN share one common network number. This is known as an
Internet Protocol address.
Subnet Mask
The subnet mask specifies the network number portion of an IP address. Your
ZyXEL Device will compute the subnet mask automatically based on the IP
address that you entered. You don't need to change the subnet mask computed by
the ZyXEL Device unless you are instructed to do otherwise.
DHCP
DHCP (Dynamic Host Configuration Protocol) allows clients to obtain TCP/IP
configuration at start-up from a server. This ZyXEL Device has a built-in DHCP
server capability that assigns IP addresses and DNS servers to systems that
support DHCP client capability.
DNS
DNS (Domain Name System) maps a domain name to its corresponding IP
address and vice versa. The DNS server is extremely important because without
it, you must know the IP address of a computer before you can access it. The DNS
server addresses you enter when you set up DHCP are passed to the client
machines along with the assigned IP address and subnet mask.
7.1.2.2
About UPnP
How do I know if I'm using UPnP?
UPnP hardware is identified as an icon in the Network Connections folder
(Windows XP). Each UPnP compatible device installed on your network will appear
as a separate icon. Selecting the icon of a UPnP device will allow you to access the
information and properties of that device.
Page 155 / 424
Chapter 7 Home Networking
P-2612HNU-Fx User’s Guide
155
Cautions with UPnP
The automated nature of NAT traversal applications in establishing their own
services and opening firewall ports may present network security issues. Network
information and configuration may also be obtained and modified by users in some
network environments.
When a UPnP device joins a network, it announces its presence with a multicast
message. For security reasons, the ZyXEL Device allows multicast messages on
the LAN only.
All UPnP-enabled devices may communicate freely with each other without
additional configuration. Disable UPnP if this is not your intention.
UPnP and ZyXEL
ZyXEL has achieved UPnP certification from the Universal Plug and Play Forum
UPnP™ Implementers Corp. (UIC). ZyXEL's UPnP implementation supports
Internet Gateway Device (IGD) 1.0.
See
Section 7.9 on page 170
for examples of installing and using UPnP.
7.1.2.3
About File Sharing
User Account
This gives you access to the file sharing server. It includes your user name and
password.
Workgroup name
This is the name given to a set of computers that are connected on a network and
share resources such as a printer or files. Windows automatically assigns the
workgroup name when you set up a network.
Shares
When settings are set to default, each USB device connected to the ZyXEL Device
is given a folder, called a “share”. If a USB hard drive connected to the ZyXEL
Device has more than one partition, then each partition will be allocated a share.
You can also configure a “share” to be a sub-folder or file on the USB device.
File Systems
A file system is a way of storing and organizing files on your hard drive and
storage device. Often different operating systems such as Windows or Linux have

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