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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 will not know

in advance what your IP address will be, and the address can change frequently. In this case,

you can use a commercial Dynamic DNS service to register your domain to their IP address,

and forward traffic directed at your domain to your frequently changing IP address.

The router contains a client that can connect to a Dynamic DNS service provider. To use this

feature, you must select a service provider and obtain an account with them. After you have

configured your account information in the router, whenever your ISP-assigned IP address

changes, your router will automatically contact your Dynamic DNS service provider, log in to

your account, and register your new IP address.

WARNING!

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 will not be routed on the Internet.

To configure Dynamic DNS:

1.

From the main menu, select

Dynamic DNS

to display the Dynamic DNS screen:

2.

Access the website of one of the Dynamic

DNS service providers whose names appear in

the

Service Provider

drop-down list, and

register for an account.

For example, 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.

Fill in the

Host Name

,

User Name

, and

Password

fields.

The Dynamic DNS service provider might call the host name a domain name. If your URL

is myName.dyndns.org, then your host name is myName. The password can be a key for

your Dynamic DNS account.

If your Dynamic DNS provider allows the use of wildcards in resolving your URL, you can

select the

Use wildcards

check box to activate this feature.

For example, the wildcard feature will cause *.yourhost.dyndns.org to be aliased to the

same IP address as yourhost.dyndns.org.

6.

Click

Apply

to save your configuration.

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Using Static Routes

Static routes provide additional routing information to your router. Under normal

circumstances, the router has adequate routing information after it has been configured for

Internet access, and you do not need to configure additional static routes. You must configure

static routes only for unusual cases such as multiple routers or multiple IP subnets located on

your network.

Static Route Example

As an example of when a static route is needed, consider the following case:

•

Your primary Internet access is through a cable modem to an ISP.

•

You have an ISDN router on your home network for connecting to the company where

you are employed. This router’s address on your LAN is 192.168.0.100.

•

Your company’s network is 134.177.0.0.

When you first configured your router, two implicit static routes were created. A default route

was created with your ISP as the router, and a second static route was created to your local

network for all 192.168.0.x addresses. With this configuration, if you attempt to access a

device on the 134.177.0.0 network, your router forwards your request to the ISP. The ISP

forwards your request to the company where you are employed, and the request is likely to

be denied by the company’s firewall.

In this case you must define a static route, telling your router that 134.177.0.0 should be

accessed through the ISDN router at 192.168.0.100.

In this example:

•

The

Destination IP Address

and

IP Subnet Mask

fields specify that this static route

applies to all 134.177.x.x addresses.

•

The

Gateway IP Address

fields specify that all traffic for these addresses should be

forwarded to the ISDN router at 192.168.0.100.

•

In the

Metric

field, a value of 1 will work since the ISDN router is on the LAN.

This represents the number of routers between your network and the destination. This is

a direct connection, so it is set to 1.

•

Private

is selected only as a precautionary security measure in case RIP is activated.

To configure static routes:

1.

From the main menu, under Advanced, select Static Routes to view the Static Routes

screen.

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2.

Select the radio button of the static route you want to configure.

3.

Click

Add

or

Edit

to display the following screen:

4.

Fill in or change the fields:

•

Route Name.

The route name is for identification purposes only.

•

Private

. Select this check box if you want to limit access to the LAN only.

The static route will not be reported in RIP.

•

Active

. Select this check box to make this route effective.

•

Destination IP Address

, and

IP Subnet Mask

. If the destination is a single host, type

a subnet value of

255.255.255.255

.

•

Gateway IP Address

. This must be a router on the same LAN segment as the router.

•

Metric

. Type a number between 2 and 15. This represents the number of routers

between your network and the destination. Usually, a setting of 2 or 3 works, but if this

is a direct connection, set it to 2.

5.

Click

Apply

to save your changes. If you added a static route, it is added to the Static

Routes screen.

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Enabling Remote Management

Using the Remote Management screen, you can allow a user or users on the Internet to

configure, upgrade, and check the status of your router.

Tip:

Be sure to change the router default password to a very secure

password. The ideal password should contain no dictionary words from

any language, and should be a mixture of letters (both upper-case and

lower-case), numbers, and symbols. Your password can be up to 30

characters.

To configure Remote Management

1.

Log in to the router. Type

in the address field of your

Internet browser. Enter

admin

for the user name and your password (or the default,

password

)

.

2.

Under Advanced, select Remote Management:

3.

Select the

Turn Remote Management On

check box.

4.

Specify which external addresses will be allowed

to access the router’s remote management.

For security, restrict access to as few external

IP addresses as practical:

•

To allow access from any IP address on the

Internet, select

Everyone

.

•

To allow access from a range of IP

addresses on the Internet, select

IP

Address Range

. Enter a beginning and ending IP address to define the allowed

range.

•

To allow access from a single IP address on the Internet, select

Only This Computer

.

Enter the IP address that will be allowed access.

5.

Specify the port number that will be used for accessing the router menu.

Access normally uses the standard HTTP service port 80. For greater security, you can

enter a different port number. Choose a number between 1024 and 65535, but do not use

the number of any common service port. The default is 8080, which is a common

alternate for HTTP.

6.

Click

Apply

to have your changes take effect.

When accessing your router from the Internet, type your router WAN IP address in your

Internet browser address or location field, followed by a colon (:) and the custom port

number. For example, if your external address is 134.177.0.123 and you use port number

8080, enter:

http://134.177.0.123:8080.

Be sure to include http:// in the address.

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Universal Plug and Play

Universal Plug and Play (UPnP) helps devices such as Internet appliances and computers

access the network and connect to other devices as needed. UPnP devices can

automatically discover the services from other registered UPnP devices on the network.

1.

Select UPnP on the main menu to display the UPnP screen:

2.

Fill in the settings on the UPnP screen:

•

Turn UPnP On

. UPnP can be enabled or disabled for automatic device configuration.

The default setting for UPnP is enabled. If this feature is disabled, the router will not

allow any device to automatically control the resources, such as port forwarding

(mapping), of the router.

•

Advertisement Period

. The advertisement period is how often the router advertises

(broadcasts) its UPnP information. This value can range from 1 to 1440 minutes. The

default period is 30 minutes. Shorter durations ensure that control points have current

device status at the expense of additional network traffic. Longer durations might

compromise the freshness of the device status but can significantly reduce network

traffic.

•

Advertisement Time To Live

. The time to live for the advertisement is measured in

hops for each UPnP packet sent. A hop is the number of steps allowed to propagate

for each UPnP advertisement before it disappears. The number of hops can range

from 1 to 255. The default value for the advertisement time to live is 4 hops, which

should be fine for most home networks. If you notice that some devices are not being

updated or reached correctly, then it might be necessary to increase this value a little.

•

UPnP Portmap Table

. The UPnP Portmap Table displays the IP address of each

UPnP device that is currently accessing the router and which ports (internal and

external) that device has opened.

3.

To save or cancel your changes or refresh the table:

•

Click

Apply

to save the new settings to the router.

•

Click

Cancel

to disregard any unsaved changes.

•

Click

Refresh

to update the portmap table and to show the active ports that are

currently opened by UPnP devices.