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(Wireless) ADSL VPN Firewall Router with 3DES Accelerator
Chapter 4: Configuration
45
DNS
A Domain Name System (DNS) contains a mapping table for domain name and IP
addresses. On the Internet, every host has a unique and user-friendly name (domain name)
such as www.abc.com and an IP address. An IP address is a 32-bit number in the form of
xxx.xxx.xxx.xxx
, for example
192.168.1.254. You can think of an IP address as a telephone
number for devices on the Internet, and the DNS will allow you to find the telephone number
for any particular domain name. As an IP Address is hard to remember, the DNS converts
the friendly name into its equivalent IP Address.
You can obtain a Domain Name System (DNS) IP address automatically if your ISP has
provided it when you logon. Usually when you choose PPPoE or PPPoA as your WAN - ISP
protocol, the ISP will provide the DNS IP address automatically. You may leave the
configuration field blank. Alternatively, your ISP may provide you with an IP address of their
DNS. If this is the case, you must enter the DNS IP address.
If you choose one of the other three protocols
─
RFC1483 Routed/Bridged and IPoA check
with your ISP, it may provide you with an IP address for their DNS server. You must enter
the DNS IP address if you set the DNS of your PC to the LAN IP address of this router.
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ADSL
Connect Mode:
The default is Multimode; it will detect the ADSL line code, G.dmt, G.lite,
and T1.413 automatically. But in some area, it cannot detect the ADSL line code well. At this
time, please adjust the ADSL line code to G.dmt or T1.413 first. If it still fails, please try the
other values such as ALCTL, ADI, etc.
Activate Line:
Aborting (false) your ADSL line and making it active (true) again for taking
effect with setting of
Connect Mode
.
Coding Gain:
Configure the ADSL coding gain from 0 dB to 7dB, or automatic.
Tx Attenuation:
Setting ADSL transmission gain, the value is between 0~12.
DSP FirmwareVersion:
Current ADSL line code firmware version.
Connected:
Display current ADSL line sync status.
Operational Mode:
Display current ADSL mode standard (Operational Mode) your Router is
using when ADSL line has sync.
Annex Type:
ADSL Annex A, which works over a standard telephone line. Annex B, which
works over an ISDN line.
Upstream:
Display current upstream rate of your ADSL line.
Downstream:
Display current downstream rate of your ADSL line.
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System
There are six items within the
System
section:
Time Zone, Remote Access, Firmware
Upgrade, Backup/Restore, Restart
and
User Management.
Time Zone
The router does not have a real time clock on board; instead, it uses the Simple Network
Time Protocol (SNTP) to get the current time from an SNTP server outside your network.
Choose your local time zone, click
Enable
and click the
Apply
button. After a successful
connection to the Internet, the router will retrieve the correct local time from the SNTP server
you have specified. If you prefer to specify an SNTP server other than those in the drop-
down list, simply enter its IP address as shown above. Your ISP may provide an SNTP
server for you to use.
Resync Poll Interval
(in minutes) is the periodic interval the router will wait before it re-
synchronizes the router’s time with that of the specified SNTP server. In order to avoid
unnecessarily increasing the load on your specified SNTP server you should keep the poll
interval as high as possible – at the absolute minimum every few hours or even days.
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Remote Access
To temporarily permit remote administration of the router (i.e. from outside your LAN),
select a time period the router will permit remote access for and click
Enable.
You may
change other configuration options for the web administration interface using
Device
Management
options in the
Advanced
section of the GUI.
If you wish to permanently enable remote access, choose a time period of 0 minutes. This
setting cannot be saved into flash when timer set to zero.
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(Wireless) ADSL VPN Firewall Router with 3DES Accelerator
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49
DO NOT power down the router or interrupt the firmware upgrading
while it is still in process.
Improper operation could damage the router.
Firmware Upgrade
Your router’s “firmware” is the software that allows it to operate and provides all its
functionality. Think of your router as a dedicated computer, and the firmware as the software
it runs. Over time this software may be improved and modified, and your router allows you to
upgrade the software it runs to take advantage of these changes.
Clicking on
Browse
will allow you to select the new firmware image file you have
downloaded to your PC. Once the correct file is selected, click Upgrade to update the
firmware in your router.
Warning
19216811.live