Chapter 5
Managing Your Network
This chapter describes how to perform network management tasks with your 54 Mbps ADSL Modem Wireless Router Model DG834G.
Backing Up, Restoring, or Erasing Your Settings
The configuration settings of the ADSL Modem Wireless Router are stored in a configuration file in the modem router. This file can be backed up to your computer, restored, or reverted to factory default settings. The procedures below explain how to do these tasks.
How to Back Up the Configuration to a File
- Log in to the modem router at its default LAN address of http://192.168.0.1 with its default User Name of admin, default password of password, or using whatever User Name, Password and LAN address you have chosen for the modem router.
- From the Maintenance heading of the Main Menu, select the Backup Settings menu shown.
- Click Backup to save a copy of the current settings.
- Store the .cfg file on a computer on your network.
How to Restore the Configuration from a File
- Log in to the modem router at its default LAN address of http://192.168.0.1 with its default User Name of admin, default password of password, or using whatever User Name, Password and LAN address you have chosen for the modem router.
- From the Maintenance heading of the Main Menu, select the Settings Backup menu.
- Enter the full path to the file on your network or click the Browse button to locate the file.
- When you have located the .cfg file, click the Restore button to upload the file to the modem router.
- The modem router will then reboot automatically.
How to Erase the Configuration
It is sometimes desirable to restore the modem router to the factory default settings. This can be done by using the Erase function.
- To erase the configuration, from the Maintenance menu Settings Backup link, click the Erase button on the screen.
- The modem router will then reboot automatically.
After an erase, the modem router's password will be password, the LAN IP address will be 192.168.0.1, and the modem router's DHCP client will be enabled.
Note: To restore the factory default configuration settings without knowing the login password or IP address, you must use the Default Reset button on the rear panel of the modem router. See “The Router’s Rear Panel” on page 2-9.
Upgrading the Modem Router's Firmware
The software of the ADSL Modem Wireless Router is stored in FLASH memory, and can be upgraded as new software is released by NETGEAR.
Upgrade files can be downloaded from NETGEAR's Web site. If the upgrade file is compressed (.ZIP file), you must first extract the binary (.BIN or .IMG) file before uploading it to the modem router.
Managing Your Network
How to Upgrade the Modem Router Firmware
NETGEAR recommends that you back up your configuration before doing a firmware upgrade. After the upgrade is complete, you may need to restore your configuration settings.
- Download and unzip the new software file from NETGEAR.
The Web browser used to upload new firmware into the modem router must support HTTP uploads. NETGEAR recommends using Microsoft Internet Explorer 5.0 or above, or Netscape Navigator 4.7 or above.
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Log in to the modem router at its default LAN address of http://192.168.0.1 with its default User Name of admin, default password of password, or using whatever User Name, Password and LAN address you have chosen for the modem router.
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From the Main Menu of the browser interface, under the Maintenance heading, select the Modem Router Upgrade heading to display the menu shown.
Figure 5-2
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In the Modem Router Upgrade menu, click the Browse to locate the binary (.BIN or .IMG) upgrade file.
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Click Upload.
Warning: When uploading software to the modem router, it is important not to interrupt the Web browser by closing the window, clicking a link, or loading a new page. If the browser is interrupted, it may corrupt the software. When the upload is complete, your modem router will automatically restart. The upgrade process will typically take about one minute. In some cases, you may need to clear the configuration and reconfigure the modem router after upgrading.
Managing Your Network
Network Management Information
The DG834G v3 provides a variety of status and usage information which is discussed below.
Viewing Modem Router Status and Usage Statistics
From the Main Menu, under Maintenance, click Modem Router Status to view this screen.
Figure 5-3
The Modem Router Status menu provides status and usage information.
Managing Your Network
Reference Manual for the ADSL Modem Wireless Router DG834G
This screen shows the following parameters:
Table 5-1. Menu 3.2 - Modem Router Status Fields
| Field | Description |
|---|---|
| Account Name | The Host Name assigned to the modem router in the Basic Settings menu. |
| Firmware Version | This field displays the modem router firmware version. |
| ADSL Port | These parameters apply to the Internet (ADSL) port of the modem router. |
| MAC Address | This field displays the Ethernet MAC address being used by the Internet (ADSL) port of the modem router. |
| IP Address | This field displays the IP address being used by the Internet (ADSL) port of the modem router. If no address is shown, the modem router cannot connect to the Internet. |
| Network Type | The network type depends is determined by your ISP. Common network types are PPPoE and PPPoA. |
| IP Subnet Mask | This field displays the IP Subnet Mask being used by the Internet (ADSL) port of the modem router. |
| Domain Name Server (DNS) | This field displays the DNS Server IP addresses being used by the modem router. These addresses are usually obtained dynamically from the ISP. |
| LAN Port | These parameters apply to the Local (ADSL) port of the modem router. |
| MAC Address | This field displays the Ethernet MAC address being used by the Local (LAN) port of the modem router. |
| IP Address | This field displays the IP address being used by the Local (LAN) port of the modem router. The default is 192.168.0.1. |
| DHCP | If OFF, the modem router will not assign IP addresses to PCs on the LAN.If ON, the modem router will assign IP addresses to PCs on the LAN. |
| IP Subnet Mask | This field displays the IP Subnet Mask being used by the Local (LAN) port of the modem router. The default is 255.255.255.0. |
| Modem | These parameters apply to the Local (WAN) port of the modem router. |
| ADSL Firmware Version | The version of the firmware. |
| Modem Status | The connection status of the modem. |
Managing Your Network
Reference Manual for the ADSL Modem Wireless Router DG834G
Table 5-1. Menu 3.2 - Modem Router Status Fields (continued)
| Field | Description |
|---|---|
| Downstream Speed | The speed at which the modem is receiving data from the ADSL line. |
| Upstream Speed | The speed at which the modem is transmitting data to the ADSL line. |
| VPI | The Virtual Path Identifier setting. |
| VCI | The Virtual Channel Identifier setting. |
| Wireless Port | These are the settings as set in the Wireless Settings page; see “Understanding Wireless Settings” in Chapter 3 for details. |
| Name (SSID) | The Service Set ID, also known as the wireless network name. |
| Region | The country where the unit is set up for use. |
| Channel | The current channel, which determines the operating frequency. |
| Wireless AP | Indicates if the Access Point feature is disabled or not. If not enabled, the Wireless LED on the front panel will be off. |
| Broadcast Name | Indicates if the DG834G v3 is configured to broadcast its SSID. |
Click the Show Statistics button to display modem router usage statistics, as shown below:
Managing Your Network
This screen shows the following statistics:
Table 5-2. Router Statistics Fields
Reference Manual for the ADSL Modem Wireless Router DG834G
Click the Connection Status button to display modem router connection status, shown below:
This screen shows the following statistics:
Table 5-3. Connection Status Fields for PPPoA
| Field | Description |
|---|---|
| Connection Time | The time elapsed since the last connection to the Internet via the ADSL port. |
| Connecting to Sender | The connection status. |
| Negotiation | ON or OFF |
| Authentication | ON or OFF |
| IP Address | The IP Address assigned to the WAN port by the ADSL Internet Service Provider. |
| Network Mask | The Network Mask assigned to the WAN port by the ADSL Internet Service Provider. |
Managing Your Network
Viewing Attached Devices
The Attached Devices menu contains a table of all IP devices that the modem router has discovered on the local network. From the Main Menu of the browser interface, under the Maintenance heading, select Attached Devices to view the table, shown:
Figure 5-6
For each device, the table shows the IP address, Device Name if available, and the Ethernet MAC address. Note that if the modem router is rebooted, the table data is lost until the modem router rediscovers the devices. To force the modem router to look for attached devices, click the Refresh button.
Viewing, Selecting, and Saving Logged Information
The modem router will log security-related events such as denied incoming service requests, hacker probes, and administrator logins. If you enabled content filtering in the Block Sites menu, the Logs page can show you when someone on your network tries to access a blocked site. If you enabled e-mail notification, you will receive these logs in an e-mail message. If you do not have e-mail notification enabled, you can view the logs here.
Managing Your Network
An example of the logs file is shown below.
Managing Your Network
Reference Manual for the ADSL Modem Wireless Router DG834G
Log entries are described in Table 5-4 below:
Table 5-4. Security Log entry descriptions
| Field | Description |
|---|---|
| Date and Time | The date and time the log entry was recorded. |
| Description or Action | The type of event and what action was taken if any. |
| Source IP | The IP address of the initiating device for this log entry. |
| Source port and interface | The service port number of the initiating device, and whether it originated from the LAN or WAN |
| Destination | The name or IP address of the destination device or Web site. |
| Destination port and interface | The service port number of the destination device, and whether it’s on the LAN or WAN. |
Log action buttons are described in Table 5-5 below:
Table 5-5. Security Log action buttons
| Field | Description |
|---|---|
| Refresh | Refresh the log screen. |
| Clear Log | Clear the log entries. |
| Send Log | Email the log immediately. |
| Apply | Apply the current settings. |
| Cancel | Clear the current settings. |
Managing Your Network
Selecting What Information to Log
Besides the standard information listed above, you can choose to log additional information. Those optional selections are as follows:
• Attempted access to blocked site
• Connections to the Web-based interface of the modem router
• Modem Router operation (start up, get time, etc.)
• Known DoS attacks and Port Scans
Saving Log Files on a Server
You can choose to write the logs to a computer running a syslog program. To activate this feature, select to Broadcast on Lan or enter the IP address of the server where the Syslog file will be written.
Examples of Log Messages
Following are examples of log messages. In all cases, the log entry shows the timestamp as: Day, Year-Month-Date Hour:Minute:Second.
Activation and Administration
Tue, 2002-05-21 18:48:39 - NETGEAR activated [This entry indicates a power-up or reboot with initial time entry.]
Tue, 2002-05-21 18:55:00 - Administrator login successful - IP:192.168.0.2 Thu, 2002-05-21 18:56:58 - Administrator logout - IP:192.168.0.2 [This entry shows an administrator logging in and out from IP address 192.168.0.2.]
Tue, 2002-05-21 19:00:06 - Login screen timed out - IP:192.168.0.2 [This entry shows a time-out of the administrator login.]
Wed, 2002-05-22 22:00:19 - Log emailed [This entry shows when the log was emailed.]
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Reference Manual for the ADSL Modem Wireless Router DG834G
D ropped Packets
Wed, 2002-05-22 07:15:15 - TCP packet dropped - Source:64.12.47.28,4787,WAN - Destination:134.177.0.11,21,LAN - [Inbound Default rule match] Sun, 2002-05-22 12:50:33 - UDP packet dropped - Source:64.12.47.28,10714,WAN - Destination:134.177.0.11,6970,LAN - [Inbound Default rule match] Sun, 2002-05-22 21:02:53 - ICMP packet dropped - Source:64.12.47.28,0,WAN - Destination:134.177.0.11,0,LAN - [Inbound Default rule match]
[These entries show an inbound FTP (port 21) packet, User Datagram Protocol (UDP) packet (port 6970), and Internet Control Message Protocol (ICMP) packet (port 0) being dropped as a result of the default inbound rule, which states that all inbound packets are denied.]
Enabling Security Event E-mail Notification
In order to receive logs and alerts by e-mail, you must provide your e-mail information in the E-mail subheading:
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- Turn e-mail notification on. Select this check box if you want to receive e-mail logs and alerts from the modem router.
- Send alerts and logs via email.
- Send To This E-mail Address Enter the e-mail address where you want to send the alerts and logs. Use a full e-mail address, such as ChrisXY@myISP.com.
- Outgoing Mail Server. Enter the name or IP address of the outgoing SMTP mail server of your ISP (such as mail.myISP.com).
- Check My Mail Server requires authentication if you need to login to your SMTP server to send E-mail. If you check this box, you must enter the user name and password for the mail server.
Tip: If you cannot remember the above information from when you set up your e-mail account, check the settings in your e-mail program.
- Send alert immediately. Select the corresponding check box if you would like immediate notification of a significant security event, such as a known attack, port scan, or attempted access to a blocked site.
- Send logs according to this schedule. Specifies how often to send the logs: Hourly, Daily, Weekly, or When Full.
- Day for sending log Specifies which day of the week to send the log. Relevant when the log is sent weekly or daily.
- Time for sending log Specifies the time of day to send the log. Relevant when the log is sent daily or weekly.
If the Weekly, Daily or Hourly option is selected and the log fills up before the specified period, the log is automatically e-mailed to the specified e-mail address. After the log is sent, it is cleared from the modem router's memory. If the modem router cannot e-mail the log file, the log buffer may fill up. In this case, the modem router overwrites the log and discards its contents.
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Running Diagnostic Utilities and Rebooting the Modem Router
The ADSL Modem Wireless Router has a diagnostics feature. You can use the diagnostics menu to perform the following functions from the modem router:
- 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 address to verify that the DNS server configuration is working.
- Display the Routing Table to identify what other modem routers the modem router is communicating with.
- Reboot the modem router to enable new network configurations to take effect or to clear problems with the modem router’s network connection.
From the Main Menu of the browser interface, under the Maintenance heading, select the Modem Router Diagnostics heading to display the menu shown.
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Enabling Remote Management
Using the Remote Management page, you can allow a user or users on the Internet to configure, upgrade and check the status of your 54 Mbps ADSL Modem Wireless Router Model DG834G.
Tip: Be sure to change the modem router's 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 and lower case), numbers, and symbols. Your password can be up to 30 characters.
Configuring Remote Management
- Log in to the modem router at its default LAN address of http://192.168.0.1 with its default User Name of admin, default password of password, or using whatever User Name, Password and LAN address you have chosen for the modem router.
- From the Advanced section of the main menu, select the Remote Management link.
Figure 5-10
- Select the Turn Remote Management On check box.
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Reference Manual for the ADSL Modem Wireless Router DG834G
- Specify what external addresses will be allowed to access the modem 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.
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Specify the Port Number that will be used for accessing the management interface. Web browser access normally uses the standard HTTP service port 80. For greater security, you can change the remote management Web interface to a custom port by entering that number in the box provided. 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.
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Click Apply to have your changes take effect. When accessing your modem router from the Internet, you will type your modem router's WAN IP address in your browser's Address (in IE) or Location (in Netscape) box, 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 in your browser: http://134.177.0.123:8080
Note: In this case, the http:// must be included in the address.
Managing Your Network
Managing Your Network