Wireless ADSL2+ Modem Router DG834Gv5 User Manual

Managing Your Network

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v1.0, March 2010

This screen shows the following statistics:

Viewing Attached Devices

The Attached Devices screen contains a table of all IP devices that the modem router has

discovered on the local network. From the main menu, under the Maintenance heading, select

Attached Devices. The Attached Devices screen displays:

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 logs security-related events such as denied incoming service requests, hacker

probes, and administrator logins. If you enabled content filtering in the Block Sites screen, the

Logs screen can show you when someone on your network tries to access a blocked site. An

example of the logs file is shown in the following figure:

Table 4-3.

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

Success or Off.

Authentication

Success 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.

Figure 4-6

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Log entries are described in the following table.

Figure 4-7

Table 4-4.

Security Log Entry Descriptions

Field

Description

Current 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 website.

Destination port and interface

The service port number of the destination device, and whether it is on

the LAN or WAN.

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Selecting Which Information to Log

Besides the standard information listed previously, 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 the

Broadcast on LAN

radio button or enter the IP address of the server where the syslog

file will be written.

Log Message Examples

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.]

Dropped 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.]

Wireless ADSL2+ Modem Router DG834Gv5 User Manual

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Running Diagnostic Utilities and Rebooting the Modem

Router

The modem router has a diagnostics feature. You can use the Diagnostics screen 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. If Ping VPN is

enabled, the ping packet always goes through the VPN if the VPN tunnel is enabled and

working.

•

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, under the Maintenance heading, select Modem Router Diagnostics to

display the Diagnostics screen:

Figure 4-8

Wireless ADSL2+ Modem Router DG834Gv5 User Manual

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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 modem router.

Configuring Remote Management

1.

Log in to the modem router at its default LAN address of

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.

2.

Under the Advanced heading of the main menu, select Remote Management to display the

Remote Management screen:

3.

Select the

Turn Remote Management On

check box.

4.

Specify which 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:

Tip:

Be sure to change the modem 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.

Figure 4-9