Netgear Dm111pspv2 Adsl2 Plus Ethernet Modem User Manual

							Network Maintenance51
 Broadband ADSL2+ Modem DM111PSPv2
To view the connection status:
In the Router Status screen, click the Connection Status
 button to display a screen similar to 
this:
The following fields are displayed:
Connection Time . The time elapsed since the last connection to the Internet through the\
 
DSL port.
Connecting to sender . The connection status.
Negotiation. Success or Failed.
Authentication. Success or Failed.
Obtaining IP Address . The IP address assigned to the WAN port by the ISP.
Obtaining Network Mask. The network mask assigned to the WAN port by the ISP. 
View Attached Devices
The Attached Devices screen presents a table of all IP devices that the \
modem has 
discovered on the local network. 
To view attached devices:
1.  Select  Maintenance >  Attached Devices to view the following table: 
						

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Broadband ADSL2+ Modem DM111PSPv2 
2. 
Click  Refresh  to update the screen.
For each device, the table shows the IP address, device name if availabl\
e, and the Ethernet 
MAC address. Note that if the modem is rebooted, the table data is lost \
until the broadband 
ADSL2+ modem rediscovers the devices. To force the broadband ADSL2+ mode\
m to look for  attached devices, click the Refresh button.
Run Diagnostic Utilities
The modem has a diagnostics feature that you can use to perform the foll\
owing functions:
•     Ping an IP address to test connectivity to see if you can reach a remote\
 host.
•      Perform a DNS lookup to test if an Internet name resolves to an IP addre\
ss to verify that 
the DNS server configuration is working.
•      Display the Routing table to identify what other broadband ADSL2+ modems\
 the modem 
is communicating with.
•     Reboot the modem to enable new network configurations to take effect or \
to clear  problems with the modem’s network connection.
To run diagnostic utilities:
1. Select  Maintenance >  Diagnostics to display the following screen.
2. Get diagnostic information as follows:
a. To ping an IP address, fill in the IP address, and click  Ping.
b.  To perform a DNS lookup, fill in the Internet Name and click Lookup.
c.  To display the routing table, click  Display.
d.  Tor reboot the router, click  Reboot. 
						

							53
5
5.   Advanced Settings
Configuring for unique situations
This chapter describes the advanced features of your modem. The information is for users with a 
solid understanding of networking concepts who want to set the modem up for unique situations 
such as when remote access from the Internet by IP or domain name is needed.
This chapter contains the following sections:
•     WAN Setup 
•     Dynamic DNS 
•     LAN Setup 
•     Remote Management 
•     Static Routes 
•     Universal Plug and Play 
•     Change the Device Mode  
						

							Advanced Settings54
Broadband ADSL2+ Modem DM111PSPv2 
WAN Setup
The WAN Setup screen lets you configure a DMZ (demilitarized zone) ser\
ver, change the 
Maximum Transmit Unit (MTU) size, and enable the wireless 
modem to respond to a ping on 
the WAN (Internet) port. 
To set up the WAN:
1.  Select  Advanced > WAN Setup to display the following screen:
2. Fill in the fields as follows:
Connect Automatically, as Required . This option is enabled by default so that Internet 
connections are made automatically whenever Internet-bound traffic is de\
tected. If this 
causes high connection costs, you can disable this setting and connect m\
anually from the 
Router Status screen. See  View Modem Status on page
  48.
Enable PPPoE Relay . When enabled, this feature allows a PPPoE client on a local PC to 
connect to a remote PPPoE server with the gateway acting as a relay agen\
t.
Disable Port Scan and DOS Protection. The firewall protects your LAN against port 
scans and denial of service (DOS) attacks. This protection should be d\
isabled only in 
special circumstances.
Default DMZ Server . The default demilitarized zone (DMZ) server feature is helpful when \
you use online games and video conferencing applications that are incomp\
atible with 
NAT. The modem is programmed to recognize some of these applications and\
 to work 
correctly with them, but there are other applications that might not fun\
ction well. In some 
cases, one local computer can run the application correctly if that comp\
uter’s IP address 
is entered as the default DMZ server. 
						

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 Broadband ADSL2+ Modem DM111PSPv2
Note:  
For security reasons, you should avoid using the default DMZ server 
feature. When a computer is designated as the default DMZ server, 
it loses much of the protection of the firewall and is exposed to many 
exploits from the Internet. If compromised, the computer can be 
used to attack your network.
Incoming traffic from the Internet is usually discarded by the modem unl\
ess the traffic is a 
response to one of your local computers or a service that you have confi\
gured in the Ports 
screen. Instead of discarding this traffic, you can have it forwarded to\
 one computer on your 
network. This computer is called the default DMZ server.
To assign a computer or server to be a default DMZ server: 
1.  In the WAN Setup screen, select the Default DMZ Server check box.
2. Type the IP address for that server.
3.  Fill in the following fields, and click  Apply: 
Respond to Ping on Internet WAN Port . If you want the broadband ADSL2+ modem to 
respond to a ping from the Internet, select this check box. This should \
be used only as a 
diagnostic tool, because it allows your modem to be discovered. Do not s\
elect this check 
box unless you have a specific reason to do so.
MTU Size (in bytes). The normal Maximum Transmit Unit (MTU) value for most Ethernet 
networks is 1500 bytes, or 1492 bytes for PPPoE connections. For some IS\
Ps you might 
need to reduce the MTU. But this is rarely required, and should not be d\
one unless you 
are sure it is necessary for your ISP connection.
Disabling SIP ALG . The Session Initiation Protocol (SIP) Application Level Gateway 
(ALG) is enabled by default to optimize VoIP phone calls that use the \
SIP. The Disable 
SIP ALG check box allows you to disable the SIP ALG. Disabling the SIP A\
LG might be 
useful when you are running certain applications. 
						

							Advanced Settings56
Broadband ADSL2+ Modem DM111PSPv2 
Dynamic DNS
If your network has a permanently assigned IP address, you can register \
a domain name and 
have that name linked with your IP address by public Domain Name Servers\
 (DNS). 
However, if your Internet account uses a dynamically assigned IP address\
, you do not know 
in advance what your IP address is, and the address can change frequentl\
y. In this case, use 
a commercial Dynamic DNS service that lets you register your domain to i\
ts IP address and 
forwards traffic directed at your domain to your frequently changing IP \
address. 
The 
modem  has a client that can connect to a Dynamic DNS service provider. Once yo\
u have 
configured your ISP account information in the modem,
  whenever your ISP-assigned IP 
address changes, your modem  contacts your Dynamic DNS service provider, logs in to your 
account, and registers your new IP address.
To set up Dynamic DNS:
1.  Select  Advanced > Dynamic DNS to display the following screen.
2. Access the website of one of the Dynamic DNS service providers whose nam\
es appear in 
the Service Provider drop-down list, and register for an account. For ex\
ample, for 
dyndns.org, go to www.dyndns.org.
3.  Select the  Use a Dynamic DNS Service  check box. 
4.  Select the name of your Dynamic DNS service provider. 
5.  Type the host name that your Dynamic DNS service provider gave you. The \
Dynamic DNS 
service provider might call this the domain name. If your URL is myName.\
dyndns.org, then 
your host name is myName.
6.  Type the user name for your Dynamic DNS account. 
7.  Type the password (or key) for your Dynamic DNS account. 
8.  If your Dynamic DNS provider allows the use of wildcards in resolving yo\
ur URL, you can 
select the Use Wildcards check box to activate this feature. For example, the wildcard 
feature causes *.yourhost.dyndns.org to be aliased to the same IP addres\
s as 
yourhost.dyndns.org.
9.  Click  Apply to save your settings. 
						

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 Broadband ADSL2+ Modem DM111PSPv2
Note:  
If your ISP assigns a private WAN IP address such as 192.168.x.x 
or 10.x.x.x, the Dynamic DNS service will not work because private 
addresses are not routed on the Internet.
LAN Setup
The LAN Setup screen allows configuration of LAN IP services such as DHC\
P and Routing 
Information Protocol (RIP). The modem is shipped preconfigured to use \
private IP addresses 
on the LAN side and to act as a DHCP server. The modem’s default LAN \
IP configuration is 
as follows:
•     LAN IP address . 192.168.0.1
•     Subnet mask . 255.255.255.0
These addresses are part of the private address range designated by the \
Internet 
Engineering Task Force (IETF  http://www.ietf.org/) for use in private networks, and should be 
suitable in most applications. If your network has a requirement to use \
a different IP 
addressing scheme, you can make those changes in the LAN Setup screen.
Note:   If you change the LAN IP address of the modem while connected 
through the browser, you are disconnected. To reconnect, open a 
new connection to the new IP address and log in.
To change the LAN setup:
1.  Select  Advanced >  LAN Setup.
2.  Enter the LAN Setup configuration, and click  Apply to save your changes. 
						

							Advanced Settings
58 Broadband ADSL2+ Modem DM111PSPv2 
IP Address. The LAN IP address of the broadband ADSL2+ modem.
IP Subnet Mask. The LAN subnet mask of the modem. Combined with the IP address, 
the IP subnet mask allows a device to know which other addresses are local to it, and 
which have to be reached through a gateway or broadband ADSL2+ modem.
RIP Direction. RIP allows a modem to exchange routing information with other modems. 
The RIP Direction selection controls how the broadband ADSL2+ modem sends and 
receives RIP packets. The default setting is Both. 
•     When set to Both or Out Only, the modem broadcasts its routing table periodically. 
•     When set to Both or In Only, the modem incorporates the RIP information that it 
receives. 
•     When set to None, the modem does not send any RIP packets and ignores any RIP 
packets received. 
RIP Version. This controls the format and the broadcasting method of the RIP packets 
that the modem sends. It recognizes both formats when receiving. By default, this is set 
for RIP-1.
•     RIP-1. This version is universally supported. It is probably adequate for most 
networks, unless you have an unusual network setup. 
•     RIP-2. This version carries more information. Both RIP-2B and RIP-2M send the 
routing data in RIP-2 format. 
•     RIP-2B. This version uses subnet broadcasting. 
•     RIP-2M. This version uses multicasting.
Access Modem Interface on Additional Port
When NAT is disabled, the modem’s management interface can be accessed at the modem’s 
LAN address using the port number you enter. This feature is not available when NAT is 
enabled.
Use Modem as DHCP Server
By default, the modem functions as a Dynamic Host Configuration Protocol (DHCP) server, 
allowing it to assign IP, DNS server, and default gateway addresses to all computers 
connected to the modem’s LAN. The assigned default gateway address is the LAN address 
of the modem. IP addresses are assigned to the attached PCs from a pool of addresses 
specified in this screen. Each pool address is tested before it is assigned to avoid duplicate 
addresses on the LAN. For most applications, the default DHCP and TCP/IP settings of the 
modem are satisfactory.  
						

							Advanced Settings
59  Broadband ADSL2+ Modem DM111PSPv2
Reserved IP Address Setup
When you specify a reserved IP address for a computer on the LAN, that computer always 
receives the same IP address each time it accesses the modem’s DHCP server. Reserved IP 
addresses should be assigned to servers that require permanent IP settings. 
To reserve an IP address: 
1. Select Advanced > LAN Setup, and click the Add button. 
2. In the IP Address field, type the IP address to assign to the computer or server. Choose an 
IP
 address from the modem’s LAN subnet, such as 192.168.0.x. 
3. Type the MAC address of the computer or server. 
Tip:  If the computer is already present on your network, copy its MAC 
address from the Attached Devices screen and paste it here.
4. Click Apply to enter the reserved address into the table. 
Note:  The reserved address is not assigned until the next time the 
computer contacts the modem’s DHCP server. Reboot the computer 
or access its IP configuration to force a DHCP release and renew.
To edit or delete a reserved address entry: 
1. Select the button next to the reserved address that you want to edit or delete. 
2. Click Edit or Delete.
Remote Management
The Remote Management screen lets you allow a user or users on the Internet to configure, 
upgrade, and check the status of your modem. 
						

							Advanced Settings60
Broadband ADSL2+ Modem DM111PSPv2 
To configure remote management:
1. 
Select  Advanced > Remote Management to display this screen:
2. Select the  Turn Remote Management On  check box.
3.  Specify the external addresses that can access remote management. For se\
curity, restrict 
access to as few external IP addresses as practical:
•      To allow access from a single IP address on the Internet, select  Only This Computer, 
and enter the IP address that is allowed access. 
•      To allow access from a range of IP addresses on the Internet, select  IP Address, and 
enter a beginning and ending IP address to define the allowed range. 
•     To allow access from any IP address on the Internet, select  Everyone. 
4.  Specify the port number to be used for accessing the modem interface.
Web browser access usually uses the standard HTTP service port 80. For g\
reater 
security, you can change it so the remote  modem interface uses a custom port by entering 
that number in the field provided. Choose a number between 1024 and 6553\
5, but do not 
use the number of any common service port. The default is 8080, which is\
 a common 
alternate for HTTP.
5.  Click  Apply to save your changes.
To access your modem from the Internet, type your modem’s WAN IP addr\
ess in your 
browser’s Address field, followed by a colon (:) and the custom por\
t number.