NETGEAR CG3000DCR Comcast Router Manual PDF (Setup & Configuration Guide)

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Advanced Settings

36

NETGEAR Wireless Cable Gateway CG3000

LAN IP Setup

The LAN IP screen allows you to configure LAN services such as the IP address of the

gateway and DHCP. The TCP/IP and DHCP default values work fine in most cases.

Note:

If you disable the DHCP server, you will need to assign to your

computer a static IP address to reconnect to the gateway and enable

the DHCP server again.

1.

Select

Advanced > LAN IP

.

2.

Enter these settings:

•

LAN IP Address

. The factory default

setting is 192.168.1.1.

•

Subnet Mask

. The network number portion

of an IP address. Unless you are

implementing subnetting, use

255.255.255.0 as the subnet mask.

•

DHCP Server

: The

Yes

radio button is

selected by default so the gateway acts as

a DHCP server, providing the TCP/IP

configuration for all the computers

connected to it.

If you will assign IP addresses manually, or

you have another DHCP server on your

network, select the

No

radio button.

•

Starting IP Address

and

Ending IP

Address

. These fields specify the range in

the IP address pool.

•

Max Users

. The maximum number of

users on the network.

•

DHCP Lease

. See the following section,

Reserving an IP Address for DHCP Use

.

3.

Click

Apply

to save your LAN settings

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Advanced Settings

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NETGEAR Wireless Cable Gateway CG3000

Reserving an IP Address for DHCP Use

To reserve an IP address for DHCP use, enter the DHCP server reservation settings for the

private LAN under DHCP Reservation Lease Info in the LAN Setup screen.

Reserve an IP address for DHCP:

1.

Enter the MAC address of the computer for which you want to reserve an IP address.

2.

Enter the permanent IP address for the computer.

3.

Click

Add

to save your settings. The MAC address and IP address display in the DHCP

Client Lease Info table. The current system time is also displayed.

Delete an IP address from the DHCP Client Lease Info table:

1.

In the DHCP Client Lease Info table, click the radio button for the MAC and IP address

that you want to remove.

2.

Click

Delete

to remove the information for the selected MAC and IP address from the DHCP

Client Lease Info table.

To remove all information from the DHCP Client Lease Info table, click

Clear DHCP

Leases

.

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Advanced Settings

38

NETGEAR Wireless Cable Gateway CG3000

Remote Management

With remote management, you can allow a user or users on the Internet to configure,

upgrade, and check the status of the gateway.

Note:

Use very secure passwords if you enable remote management.

Passwords should contain no dictionary words from any language,

and should be a mixture of letters (both upper and lower case),

numbers, and symbols. Your password can be up to 16 characters.

To manage this gateway through the Internet, you need its public IP Address, as seen from

the Internet. This public IP address is allocated by your ISP. But if your ISP account uses a

dynamic IP address, the address can change each time you connect to your ISP. There are

two solutions to this problem:

•

Have your ISP allocate you a fixed IP address.

•

Use the DDNS (Dynamic DNS) feature so you can connect using a domain name, rather

than an IP address.

1.

In the main menu, under Advanced, select Remote Management.

2.

Select one of the

Allow Remote Management

check boxes.

3.

Fill in the

Remote User Name

and

Remote Password

fields.

4.

Specify the port numbers to access the gateway remotely in your browser when you

connect. To specify the port numbers:

a.

From a remote location, start a browser.

b.

In the Address or Location field, enter the Internet IP address of this gateway (NOT

the LAN IP address), followed by a colon and the port number, as follows:

http://ip_address:pn

ip_address is the Internet IP address of this gateway.

pn is the port number assigned on this screen.

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Advanced Settings

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NETGEAR Wireless Cable Gateway CG3000

c.

You are prompted for the password for this gateway.

5.

If you want the ability to reset to factory default settings remotely, and then log in again

remotely, select the

Allow Remote management after Factory Default Reset

check box.

6.

Click

Apply

to save your changes.

Allow Remote Management

(HTTP/HTTPS) CM interface

If selected, remote management is enabled, and connection from the

Internet to this gateway with HTTP and HTTPS is possible. The correct port

number must be used when connecting

Allow Remote Management

(HTTP/HTTPS) CM interface

If selected, remote management is enabled, and connection from the

Internet to this gateway with HTTP and HTTPS is possible.

Remote User Name and Remote

Password

Enter the User Name and Password that will be used from the remote PC to

manage the gateway. Use a very secure password.

Port Number fields

Web browser access normally uses the standard HTTP service port 80.

NETGEAR recommends that you use a different port number for remote

management, as using port 80 will prevent the use of a Web Server on your

LAN, and can be more readily discovered by hackers. Use the default

(8080) or choose a port number between 1 and 65535.

Revert to factory default settings

Allow Remote management after Factory Default Reset

IP Address to connect this device

The gateway’s public IP address so you can manage this gateway from the

Internet. Note that if your ISP account uses a dynamic IP address, this value

changes each time you connect to your ISP. You can either request your IP

allocate a fixed IP address to you or use the Dynamic DNS (DDNS) feature

to connect with a domain name instead of an IP address.

Remote Management Settings

Description

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Advanced Settings

40

NETGEAR Wireless Cable Gateway CG3000

Universal Plug and Play (UPnP)

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. With

UPnP you can specify:

•

Advertisement Period

. This specifies how often the gateway broadcasts its UPnP

information. The default is 30 minutes. Lower numbers ensure that control points

have current device status at the expense of additional network traffic. Larger

numbers may compromise the freshness of the device status but can significantly

reduce network traffic.

•

Advertisement Time to Live

. The life of the advertisement, measured in hops (steps)

for each UPnP packet that is sent. A hop is the number of steps that are 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, you might need to increase this value slightly.

1.

Select

Advanced > UPnP

.

2.

Select the

Turn UPnP On

check box. The default setting is disabled, which prevents the

gateway from allowing any device to automatically control of its the resources, such as port

forwarding.

3.

Fill in the

Advertisement Period

and

Advertisement Time to Live

fields.

The UPnP Portmap Table displays the IP address of each UPnP device that is currently

accessing the gateway and which internal and external ports of the gateway were opened

by that device. The UPnP Portmap Table also displays the protocol for the port that was

opened and if that port is still active for each IP address.

4.

Perform one of the following actions:

•

Click

Apply

to save your settings.

•

Click

Cancel

to disregard any unsaved changes.

•

Click

Refresh

to update the UPnP Portmap Table and to show the active ports that

are currently opened by UPnP devices.

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