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Version 2.0, February 2012. Copyright
2012 Hitron Technologies
46
Version 2.0, February 2012. Copyright
2012 Hitron Technologies
46
HITRON CGN2 USER’S GUIDE
3.1.2
LAN IP ADDRESSES AND SUBNETS
IP addresses on the LAN are controlled either by the CGN2’s built-in DHCP server
(see
DHCP
on page
29
), or by you (when you manually assign IP addresses to your
computers).
For more information about IP addresses and subnets in general, see
IP Addresses
and Subnets
on page
27
.
3.1.3
DNS AND DOMAIN SUFFIX
A domain is a location on a network, for instance
example.com
. On the Internet,
domain names are mapped to the IP addresses to which they should refer by the
Domain Name System. This allows you to enter “www.example.com” into your
browser and reach the correct place on the Internet even if the IP address of the
website’s server has changed.
Similarly, the CGN2 allows you to define a
Domain Suffix
to the LAN. When you
enter the domain suffix into your browser, you can reach the CGN2 no matter what IP
address it has on the LAN.
3.1.4
DEBUGGING (PING AND TRACEROUTE)
The CGN2 provides a couple of tools to allow you to perform network diagnostics on
the LAN:
Ping: this tool allows you to enter an IP address and see if a computer (or other
network device) responds with that address on the network. The name comes
from the pulse that submarine SONAR emits when scanning for underwater
objects, since the process is rather similar. You can use this tool to see if an IP
address is in use, or to discover if a device (whose IP address you know) is
working properly.
Traceroute: this tool allows you to see the route taken by data packets to get
from the CGN2 to the destination you specify. You can use this tool to solve
routing problems, or identify firewalls that may be blocking your access to a
computer or service.
Page 47 / 113
Version 2.0, February 2012. Copyright
2012 Hitron Technologies
47
Version 2.0, February 2012. Copyright
2012 Hitron Technologies
47
HITRON CGN2 USER’S GUIDE
3.2
THE IP SCREEN
Use this screen to:
View information about the CGN2’s connection to the WAN
Enable or disable manual DNS assignment
Define DNS servers for manual DNS assignment
Configure the CGN2’s LAN IP address, subnet mask and domain suffix
Configure the CGN2’s internal DHCP server
Define how the CGN2 assigns IP addresses on the LAN
See information about the network devices connected to the CGN2 on the LAN.
Click
WAN/LAN
>
IP
. The following screen displays.
Page 48 / 113
Version 2.0, February 2012. Copyright
2012 Hitron Technologies
48
Version 2.0, February 2012. Copyright
2012 Hitron Technologies
48
HITRON CGN2 USER’S GUIDE
Figure 12:
The WAN/LAN > IP Screen
The following table describes the labels in this screen.
Table 12:
The WAN/LAN > IP Screen
WAN Information
WAN Address
This field displays the CGN2’s IP address on the WAN
(Wide Area Network) interface.
Subnet Mask
This field displays the CGN2’s WAN subnet mask.
Gateway Address
This field displays the address of the device on the WAN
to which the CGN2 is connected.
Page 49 / 113
Version 2.0, February 2012. Copyright
2012 Hitron Technologies
49
Version 2.0, February 2012. Copyright
2012 Hitron Technologies
49
HITRON CGN2 USER’S GUIDE
Assign DNS
Manually
Select the checkbox to enable manual DNS server
assignment, and enter the DNS servers that you want
to use in the
DNS Server
fields below.
Deslect the checkbox to disable manual DNS server
assignment. The CGN2 uses the DNS servers
assigned automatically when it receives an IP address
over the WAN.
It is strongly recommended that you do not enable manual
DNS server assignment unless you have good reason to
do so.
DNS Server
These fields display the Domain Name Servers that the
CGN2 uses to resolve domain names into IP addresses.
If you selected the
Assign DNS Manually
checkbox,
enter the DNS servers that you want to use in these fields.
Private LAN IP Setting
IP Address
Use this field to define the IP address of the CGN2 on the
LAN.
Subnet Mask
Use this field to define the LAN subnet. Use dotted
decimal notation (for example,
255.255.255.0
).
Domain Suffix
Use this field to define the domain that you can enter into a
Web browser (instead of an IP address) to reach the
CGN2 on the LAN.
It is suggested that you make a note of your device’s
Domain Suffix
in case you ever need to access the
CGN2’s GUI without knowledge of its IP address.
Private LAN DHCP Setting
Enable LAN DHCP
Select this if you want the CGN2 to provide IP addresses
to network devices on the LAN automatically.
Deselect this if you already have a DHCP server on your
LAN, or if you wish to assign IP addresses to your
computers and other network devices manually.
Lease Time
Use this field to define the time after which the CGN2
renews the IP addresses of all the network devices
connected to the CGN2 on the LAN (when DHCP is
enabled).
DHCP Start IP
Use this field to specify the IP address at which the CGN2
begins assigning IP addresses to devices on the LAN
(when DHCP is enabled).
Table 12:
The WAN/LAN > IP Screen (continued)
Page 50 / 113
Version 2.0, February 2012. Copyright
2012 Hitron Technologies
50
Version 2.0, February 2012. Copyright
2012 Hitron Technologies
50
HITRON CGN2 USER’S GUIDE
3.3
THE SHARED MEDIA SCREEN
Use this screen to manage and share data stored on devices connected to the
CGN2’s
USB
port. The CGN2 provides one USB 2.0 host port, allowing you to plug in
a USB flash disk for mounting and sharing through the LAN interfaces via the Samba
protocol (network neighborhood).
NOTE:
This screen is not available unless a logged-in MSO admin user previously
enabled the
USB
option in the
Status
>
Capability
screen; see The
Capability Screen on page 42 for more information.
Click
WAN/LAN
>
Shared Media
. The following screen displays.
DHCP End IP
Use this field to specify the IP address at which the CGN2
stops assigning IP addresses to devices on the LAN
(when DHCP is enabled).
NOTE:
Devices requesting IP addresses once the DHCP
pool is exhausted are not assigned an IP address.
Connected Computers
Host Name
This displays the name of each network device connected
on the LAN.
IP Address
This displays the IP address of each network device
connected on the LAN.
MAC Address
This displays the Media Access Control (MAC) address of
each network device connected on the LAN.
Type
This displays whether the device’s IP address was
assigned by DHCP (
DHCP-IP
), or
self-assigned
.
Interface
This displays whether the device is connected on the LAN
(
Ethernet
) or the WLAN (
Wireless(x)
, where
x
denotes
the wireless mode;
b
,
g
or
n
).
Apply
Click this to save your changes to the fields in this screen.
Cancel
Click this to return the fields in this screen to their last-
saved values without saving your changes.
Help
Click this to see information about the fields in this screen.
Table 12:
The WAN/LAN > IP Screen (continued)

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