advertisement
AT-ARW256E User’s Guide
Web Interface User’s Guide
AT-ARW256E
4-Port Combo Ethernet USB
Wireless ADSL Router
1
AT-ARW256E User’s Guide
Tables Of Content
........................................................................................... 6
............................................................................................... 6
3. INSTALLING YOUR WIRELESS ADSL ROUTER............................................ 7
4. SETTING UP YOUR WIRELESS ADSL ROUTER (BASIC MODE)............... 8
......................................................... 8
............................................................................................ 13
................................................................................................ 15
............................................................................................ 19
5.1.2 Management IP (Changing the Wireless ADSL Router IP address) ........ 21
........................................................................................... 22
2
AT-ARW256E User’s Guide
6. APPENDIX A: TROUBLESHOOTING ............................................................... 47
......................................... 47
. ....................................... 47
CONTINUES TO BLINK BUT DOES NOT GO SOLID
................................................................. 48
7. WIRELESS ADSL ROUTER TERMS................................................................. 49
3
AT-ARW256E User’s Guide
1. Introduction
The 4-Port Combo Ethernet USB Wireless ADSL Router is the perfect high-speed WAN bridge/router.
This full-featured product is specifically designed allow maximum of 4 Ethernet-workstations to be connected to the Internet and directly connect to your local area network via high speed
10/100 Mbps Ethernet. Most importantly users using wireless workstations will be able to connect to the Internet using 802.11g wireless technology. The Wireless ADSL Router has also full NAT firewall and DMZ services to block unwanted users from accessing your network.
For game users, the Wireless ADSL Router had already pre-configured for several low latency game ports. Just click on the game you are playing on line and the rest is done for you
The Wireless ADSL Router is fully compatible with all PCs; as long as the PC supports an
Ethernet interface and is running a TCP/IP protocol stack, your PC can have high-speed WAN access. So, plug in the Wireless ADSL Router (refer to easy start guide), configure it (per your
ISP’s requirements) and enjoy the fast Internet access like never before. This router also provides future proof functionality with higher data transmission rates with ADSL2, ADSL2+, Extended
Reach-ADSL support.
1.1 Features
ADSL/ATM Support
• ANSI T1.413 issue 2, ITU-T G.992.1 (G.dmt) and G.992.2 (G.lite) compliant
• ADSL2, ADSL2+, RE-ADSL compliant
• Rate Adaptive modem at 32 Kbps steps
• Dynamic Adaptive Equalisation to improve Carrier’s service area
• Bridge Tap Mitigation support
• ATM Layer with Traffic shaping QoS Support (UBR, CBR, VBR-rt, VBR-nrt)
• AAL ATM Attributes - AAL5
• Multiple PVC up to 8 support (Bridge Support)
• Spectral compatibility with POTS
• F5 OAM Loopback/Send and Receive
Encapsulation Support
• RFC2684 Bridge and Routed LLC and VC Mux support
• RFC2364 PPPoA Client support
• RFC2516 PPPoE Client support
• RFC2225/RFC1577 Classical IP Support
• Transparent Bridge Support
• PAP/CHAP/MS-CHAP for Password Authentication Support
Network Support
• Static IP, Dynamic RIP routing support
• IP/TCP/UDP/ICMP/ARP/RARP Application Support
• Network Address Translation (NAT)
• Port Mapping/Forwarding
• Easy setup of Port Forwarding rules for popular Games/Application
• NAT Application Level Gateway for popular applications
• DHCP Server/Relay/client
• DNS Relay Agent
• DMZ support
• Single Session IP Sec and PPTP/L2TP VPN pass through support
• PPP Always on with configurable timeout
• PPP Dial on Demand
4
AT-ARW256E User’s Guide
• Universal Plug and Play Support
WLAN Support
•
IEEE 802.11, 802.11B and 802.11G compliant
•
Conforms to Wireless Ethernet Compatibility Alliance (WECA) Wireless Fidelity (Wi-Fi tm) standard
•
Supports 802.11b and 802.11g simultaneously
• Support Direct Sequence Spread Spectrum (DSSS) technology
• Operating Range of >300 Meters (Open Air)
Management Support
• Web Based HTTP management GUI
• TFTP/FTP Support for Firmware Upgrade
• Web Based Firmware Upgrade (Local)
• Soft Factory Reset Button via Web GUI
• Diagnostic Test (DSL, OAM, Network, Ping Test)
• Telnet/CLI (Read Only)
• Syslog Support
• Firmware upgrade-able for future feature enhancement
Security Support
• NAT for basic Firewall support
• Packet Filtering Firewall Support
• Stateful Packet Inspection Support
• Protection against Denial of Service attacks
• Password Authentication to Modem
External Connectors:
• 1 x RJ-11 Telephone socket for ADSL line
• 4 x RJ45 for 10/100Base-T Ethernet (MDI-X)
• 1 x USB 1.1 Type B
• 1 x DC Jack for Power Input
• 1 x Factory Default Reset Button
• 1 x On/Off Power Switch
• 1 x Co-axial Connector for Detachable 180 degree Rotate-able 2.4Ghz 3 dBi Antenna
Platform Support:
• Windows 98SE
• Windows ME
• Windows 2000
• Windows XP
• Windows 2003
5
AT-ARW256E User’s Guide
2. Your gateway at a glance
The 4-Port Combo Ethernet USB Wireless ADSL Router may have different ports and LEDs.
Let’s take a look at the different options.
2.1 Ports and buttons
Reset and Restore to Factory Defaults: The restore to factory defaults feature will set the
Wireless ADSL Router to its factory default configuration by resetting the Wireless ADSL Router.
You may need to place the Wireless ADSL Router into its factory defaults if the configuration is changed, you loose the ability to interface to the Wireless ADSL Router via the web interface, or following a software upgrade. To reset the Wireless ADSL Router, simply press the reset button for about ~ 10 seconds. The Wireless ADSL Router will be reset to its factory defaults and after about 30 ~ 40 seconds the Wireless ADSL Router will become operational again.
LAN (local area network) E1 to E4 port(s): connect to Ethernet network devices, such as a PC, hub, switch, or routers. Some Wireless ADSL Router came with a single LAN connection and some come with four LAN connections. Depending on the connection, you may need a cross over cable or a straight through cable.
Power is where you connect the power. Make sure to observe the proper power requirements.
The required power is 9 volts.
USB (universal serial port): connects to a PC’s USB port. The Wireless ADSL Router only supports Window’s based PCs via an RNDIS driver (included in the software).
DSL port: This is the WAN interface that connects directly to your phone line.
1.
POWER
Lights up when power is supplied to the Wireless ADSL Router.
2.
(E1- E4)
Lights up when the Ethernet cable is properly connected from your Wireless ADSL Router to
the Ethernet Card.
Flickers when the ADSL is transmitting/receiving data.
3.
WIRELESS
Lights up when after the router’s wireless feature is activated.
Flickers when the ADSL is transmitting/receiving data to a connected wireless client.
4.
USB
Lights up when the USB connection is established.
Flickers when the ADSL is transmitting/receiving data
5.
DSL
Lights up when the DSL connection is established.
Flickers when the Wireless ADSL Router is trying to establish a connection with the ADSL
Service Provider.
6.
INTERNET
L
ights up when the PPP connection is established.
6
AT-ARW256E User’s Guide
3. Installing your Wireless ADSL Router
1. Locate an optimum location for the Wireless ADSL Router.
2. For connections to the Ethernet and DSL interfaces, please refer to the quick installation
guide.
3. Connect the AC Power Adapter. Depending upon the type of network, you may want to put
the power supply on an uninterruptible supply. Only use the power adapter supplied with the
Wireless ADSL Router. A different adapter may damage the product.
Now that the hardware installation is complete, proceed to Chapter 4: Setting up your
Wireless ADSL Router
7
AT-ARW256E User’s Guide
4. Setting up your Wireless ADSL Router (Basic Mode)
Basic tabs consist of features which are catered for basic users.
This section will guide you through your Wireless ADSL Router’s configuration. The Wireless
ADSL Router is shipped with a standard PPP configuration.
4.1 Log into your Wireless ADSL Router
To configure the Wireless ADSL router, launch your web browser. You may get an error message at this point; this is normal. Do not panic! Type the default IP address (192.168.1.1) press the Enter key and the following page, shown in Figure 1 will appear.
Note: Before setting up your Wireless ADSL Router, make sure you have followed the
quick installation guide
. You should have your computers configured for DHCP mode and have proxies disabled on your browser. Also if you access the Wireless ADSL Router, and instead of getting a login screen, the browser instead displays a login redirection screen, you should check your browser's setting, and verify that JavaScript support is enabled. Also, if you do not get the screen shown in Figure 1, you may need to delete your temporary Internet files (basically flush the cached web pages).
Figure 1.0 (Quick Start)
The first page (Figure 1) that appears is the Quick Start page. Depending on the country that you reside in, some profiles have been preset for the VPI/VCI and type of encapsulation. For example, if you reside in New Zealand, click on the button for New Zealand and then click Next.
The next page will display the preset profile of VPI=0, VCI=100 and encapsulation type is PPPoA
VC-MUX. If this is not correct, select Customise Settings and enter the VPI and VCI values. If the ADSL service is PPPoA or PPPoE, you will also need to enter the username and password which your ADSL Provider or ISP will supply to you.
8
AT-ARW256E User’s Guide
The Quick Start page is meant for basic users who only require easy and seamless connectivity to the Internet, without worrying about any other advance configuration setting.
Alternatively, you can also click on the Wizard Tab (Figure 1.1) and follow through the step-bystep configuration
Figure 1.1 (Setup Wizard)
For more advanced setup, please proceed to the next section.
Important:
After clicking on Connect, please be sure to “Save Settings” to register the username / password or any other changes.
9
AT-ARW256E User’s Guide
If you are not login-in the first time, the router will direct you to the “Home Page” as shown in Figure 1.2
Figure 1.2 (Home Page Screen)
10
AT-ARW256E User’s Guide
4.2 Quick Start
This screen appears when the user clicks on the Quick Start hyperlink.
The screen as shown in Figure 2.1 will be shown when the router detected that there is no DSL line connected to the modem. Please follow the hint to rectify the problem.
Figure 2.1 (Quick Start Error page)
By default the Wireless ADSL Router has being configured to PPP connection and user would only need to enter the username and password (as specified by the local ISP) to make connection to the Internet.
The Quick Start page is meant for basic users whom only require easy and seamless connectivity to the Internet without worrying about any other advance configuration setting. If you are in doubt for what content to enter for the Protocol, VPI and VCI, please contact your Service Provider for details.
Important:
After clicking on Connect, please be sure to “Save Settings” to register the username / password or any other changes.
Figure 2.2 (Quick Start page)
11
AT-ARW256E User’s Guide
Upon clicking on “Connect” button the status will be shown as below.
Figure 2.3 (Quick Start Connection status page)
The router will check for wrong username and password, if the Internet connection could not be established. You can click on “here” hyperlink to re-enter your username and password.
Figure 2.4 (Quick Start Connection Fail page)
12
AT-ARW256E User’s Guide
Diagnostic Test is used for investigating whether the Wireless ADSL Router is properly connected to the WAN Network. This test may take a few seconds to complete. To perform the test, select your connection from the list and press the Test button. Before running this test, make sure you have a valid DSL link.
Figure 3.1 (Diagnostic Test screen)
After running the Diagnostic Test, the screen will indicate that the portion which pass or fail the test. Please click on the Help links, which will provide remedy to the problem as shown in (Figure
3.2). The purpose of the “Fix It “ button is to restore the router’s VPI and VCI to its originated setting.
Figure 3.2 (Diagnostic Test Result screen)
13
AT-ARW256E User’s Guide
Once you have your Wireless ADSL Router configured, it is a good idea to make sure you can ping the network. You can get to the Ping page by clicking on the “here” hyperlink in Diagnostic
Page. Type the target address that you want to ping. If you have your PC connected to the
Wireless ADSL Router via the default DHCP configuration, you should be able to Ping the network address 192.168.1.1. If your ISP has provided their server address you can try to ping the address. If the pings for both the WAN and the LAN side complete, and you have the proper protocols configured, you should be able to surf the Internet.
By default when you select ping test, the Wireless ADSL Router will ping itself 3 times. As shown in Figure 3.3, the Wireless ADSL Router passed the Ping test; this basically means that the
TCP/IP protocol is up and running. If this first Ping test does not pass, the TCP/IP protocol is not loaded for some reason; you should restart the Wireless ADSL Router.
Figure 3.3 (Ping Test screen)
14
AT-ARW256E User’s Guide
Note: Remote Access Hyperlink will only be visible to you, if you have successfully connected to the Internet.
Remote Access will allow a remote party to access your router, if you enable Remote Access and enter the remote party’s IP address.
Figure 4 (Remote Access screen)
4.5 Statistics
Information regarding the Status and Statistics of your Ethernet, USB and DSL line will be displayed.
Figure 5 (Statistics screen)
15
AT-ARW256E User’s Guide
4.6 Wireless
The SSID is default to “11g” and can be change.
SSID is wireless network name for the wireless router, your wireless client will need this name for wireless connection.
The wireless setup allows the user to enable or disable the AP (access point for the wireless feature). Disabling of AP will prevent the wireless router from emitting any wireless signal.
User can make change the Country selection, which is defaulted as US, channel 6.
After any changes to the Wireless Setup, please click on “Restart Access Point” to allow the
Wireless features to apply the changes.
Figure 6.1 (Wireless Setup screen)
For user who wants to explore the advanced feature, you can click on the Advance button. The options listed can be changed to cater for advance users.
Figure 6.2 (Wireless Setup screen)
16
AT-ARW256E User’s Guide
It is important for user to enforce security in wireless LAN environment, this is to prevent unauthorized wireless users from accessing your router. On default, no wireless security is configured, the “None” radio button is selected.
1) In order implement security, WEP option must be selected
2) Check on “Enable WEP Wireless Security” option
3) Select the “Cipher”option, the available options are 64bits, 128bits and 256 bits.
4) Select ASCII or HEX option
5) Follow the example as listed below to configure the wireless security settings.
6) You can configure up to 4 sets of keys for your wireless client.
Figure 7 (Wireless Security screen)
17
AT-ARW256E User’s Guide
Press this button in order to permanently save the current configuration of the Wireless ADSL
Router. If you do re-start the system without saving your configuration, the Wireless ADSL Router will revert back to the previously saved configuration.
Figure 8 (Save Settings screen)
18
AT-ARW256E User’s Guide
5. Advanced
This mode is catered for advance users, a brief explanation of the links is listed as shown in figure 9.
Figure 9 (Advanced screen)
On one side of your Wireless ADSL Router, you have your own Local Area network (LAN) connections. This is where you plug in your local computers to the Wireless ADSL Router. The
Wireless ADSL Router is normally configured to automatically provide all the PC's on your network with Internet addresses.
19
AT-ARW256E User’s Guide
To enable or disable DHCP, Click setup. Under LAN Setup, select DHCP Configuration. This will bring up the screen shown in Figure 10.
The Start IP Address is where the DHCP server starts issuing IP addresses. This value must be greater than the Wireless ADSL Router IP address value. For example if the Wireless ADSL
Router IP address is 192.168.1.1 (default) than the starting IP address must be 192.168.1.2 (or higher).
The End IP Address is where the DHCP server stops issuing IP addresses. The ending address cannot exceed a subnet limit of 254. Hence the max value for our default gateway is
192.168.1.254. If the DHCP server runs out of DHCP addresses, users will not get access to network resources. If this happens you can increase the Ending IP address (to the limit of 255) or reduce the lease time.
The Lease Time is the amount of time a network user will be allowed connection to the Wireless
ADSL Router with their current dynamic IP address. The amount of time is in units of minutes; the default value is 3600 minutes (60 hours).
Note: If you change the start or end values, make sure the values are still within the same subnet as the gateways IP address. In other words, if the gateways IP address is 192.168.1.1 (default) and you change the DHCP start/end IP addresses to be 192.128.1.2/192.128.1.100, you will not be able to communicate to the Wireless ADSL Router if your PC has DHCP enabled.
Figure 10 (DHCP Configuration screen)
In addition to the DHCP server feature, the Wireless ADSL Router supports the DHCP relay function. When the Wireless ADSL Router is configured as DHCP server, it assigns the IP addresses to the LAN clients. When the Wireless ADSL Router is configured as DHCP relay, it is responsible for forwarding the requests and responses negotiating between the DHCP clients and the server. See figure 11.
20
AT-ARW256E User’s Guide
Figure 11 (Example of a DHCP Relay configuration)
By turning off the DHCP server and relay the network administrator must carefully configure the
IP address, Subnet Mask and DNS settings of every computer on your network. Do not assign the same IP address to more than one computer and your Wireless ADSL Router must be on the same subnet as all the other computers.
The apply button will temporarily save this connection. To make the change permanent you need to click on Save Settings (at the side of the page). At the system commands page, click on Save
All.
5.1.2 Management IP (Changing the Wireless ADSL Router IP address)
You can change the Wireless ADSL Router’s IP address by, clicking Setup and under LAN Setup, select Management. This will bring up the screen shown in Figure 12.
5.1.2.1
Static IP address assignment
Your Wireless ADSL Router’s default IP address and subnet mask are
192.168.1.1/255.255.255.0; this subnet mask will allow the Wireless ADSL Router to support 254 users. If you want to support a larger number of users you can change the subnet mask; but remember the DHCP server is defaulted to only give out 255 IP addresses. Further remember that if you change your gateways’ IP address and you have DHCP enabled, the DHCP configuration must reside within the same subnet.
The default gateway is the routing device used to forward all traffic that is not addressed to a station within the local subnet. Your ISP will provide you with the default gateway Address.
The hostname can be any alphanumeric word that does not contain spaces. The domain name is used to in conjunction with the host name to uniquely identify the gateway. To access the
Wireless ADSL Router’s web pages, the user can type 192.168.1.1 (the default IP address).
The apply button will temporarily save this connection. To make the change permanent you need to click on Save Settings (at the side of the page). At the system commands page, click on Save
All.
21
AT-ARW256E User’s Guide
Figure 12 (Management IP)
On the other side of the Wireless ADSL Router is where your Wide Area Network (WAN) connection; also referred to as a broadband connection. This WAN connection is different for every WAN supplier. Most of the configurations you will perform will be in this area Local Area
Network Connection(s).
5.2.1 Status
Status will display all the relevant information regarding your Internet Connection, it will display the type of protocol used, the WAN IP address, the connection state, the duration and if it is
Disconnected the reason will be displayed. The “Disconnect” button on the right-hand side is for terminating the connection from the Internet.
Figure 13 (Connection Status Page)
22
AT-ARW256E User’s Guide
5.2.2 Configuring the WAN
Before the gateway will pass any data between the LAN interface(s) and the WAN interface, the
WAN side of the modem must be configured. Depending upon your DSL service provider or your
ISP, you will need some (or all) of the information outlined below before you can properly configure the WAN:
•
Your DSL line VPI and VCI
•
•
•
Your DSL encapsulation type and multiplexing
Your DSL training mode (default is MMODE)
For PPPoA or PPPoE users, you also need these values from your ISP:
•
•
Your username and password
For RFC 1483 users, you may need these values from your ISP:
• Your DSL fixed Internet IP address
• Your Subnet Mask
• Your Default Gateway
• Your primary DNS IP address
Since multiple users can use the Wireless ADSL Router, the Wireless ADSL Router can simultaneously support multiple connection types; hence, the user must set up different profiles for each connection. The Wireless ADSL Router supports the following protocols:
•
DHCP
•
•
•
RFC2364 / PPPoA
RFC2516 / PPPoE
Static
•
Bridged
•
RFC1577 / CLIP
A new connection is basically a virtual connection. Your Wireless ADSL Router can support up to
8 different (unique) virtual connections. If you have multiple different virtual connections, you may need to utilize the static and dynamic routing capabilities of the modem to pass data correctly.
5.2.3.1 Bridged gateway profile and Connection
A pure bridged connection does not assign and IP address to the WAN interface. NAT and firewall rules are not enabled. This connection method makes the Wireless ADSL Router act as a hub, and just passes packets across the WAN interface to the LAN interface.
To configure the Wireless ADSL Router as a bridge, click on Setup and then click on New
Connection . The default PPPoE connection setup is displayed. At the Type field select Bridge and the Bridge connection setup page is displayed (see Figure 14). Give your Bridge connection a unique name; the name must not have spaces and cannot begin with numbers. In this case the unique name is called Bridge . Select the encapsulation type (LLC or VC); if you are not sure just use the default mode. Select the VPI and VCI settings; your DSL service provider or your ISP will supply these; in this case the DSL service provider is using 0,100 . Also select the quality of service (QOS); leave the default value if you are unsure or the ISP did not provide this information.
23
AT-ARW256E User’s Guide
Figure 14 (Bridge Connection Setup)
To complete the connection you must now click the apply button. The apply button will temporarily save this connection. To make the change permanent, you need to click on Save
Settings. At the system commands page, click on Save All.
5.2.3.2 PPPoA Connection Setup
PPPoA is also known as RFC 2364. It is a method of encapsulating PPP packets over ATM cells which are carried over the DSL line. PPP or Point-to-Point protocol is a method of establishing a network connection / session between network hosts. It usually provides a mechanism of authenticating users. LLC and VC are two different methods of encapsulating the PPP packet.
Contact your ISP to make sure which encapsulation is being supported.
By selecting PPPoA, you are forcing your Wireless ADSL Router to terminate the PPPoA connection. The advantage is that the PPPoA termination is done within the Wireless ADSL
Router and not on your PC; this frees up your PC resources and allows multiple users to utilize the PPPoA connection.
To configure the gateway for PPPoA, click on Setup and then click on New Connection . The default PPPoE connection setup is displayed. At the Type field select PPPoA and the PPPoA connection setup page is displayed; figure 15 illustrates a typical PPPoA configuration. Give your
PPPoA connection a unique name; the name must not have spaces and cannot begin with numbers. In this case the unique name is called PPPoA1 . Select the encapsulation type (LLC or
VC); if you are not sure just use the default mode. Select the VPI and VCI settings; your DSL service provider or your ISP will supply these; in this case the DSL service provider is using
0,100 . Also select the quality of service (QOS); leave the default value if you are unsure or the
ISP did not provide this information.
Following is a description of the different options: a. Username: The username for the PPPoA access; this is provided by your DSL service provider or your ISP. b. Password: The password for the PPPoA access; this is provided by your DSL service provider or your ISP. c. On-Demand: Enables on-demand mode. The connection will disconnect if no activity is detected after the specified idle timeout value. d. Idle Timeout: Specifies that PPPoA connection should disconnect if the link has no activity detected for n seconds. This field is used in conjunction with the On-Demand feature. To ensure that the link is always active, enter a 0 in this field. e. Keep Alive: When on-demand option is not enable, this value specifies the time to wait without being connected to your provider before terminating the connection. To ensure that the link is always active, enter a 0 in this field.
24
AT-ARW256E User’s Guide f. Set Route: Specify this connection as the default-route.
MRU: Maximum Receive Unit the DSL connection can receive. It is a negotiated value that asks the provider to send packets of no more than n bytes. The maximum specified value is 1500 although some DSL/ISP providers require a larger value. The minimum MRU value is 128.
Figure 15 (PPPoA Connection Setup)
To complete the connection you must now click the apply button. The apply button will temporarily save this connection. To make the change permanent you need to click on Save
Setting (at the side of the page). At the system commands page, click on Save All.
5.2.3.3 PPPoE Connection Setup
PPPoE is also known as RFC 2516. It is a method of encapsulating PPP packets over Ethernet.
PPP or Point-to-Point protocol is a method of establishing a network connection/session between network hosts. It usually provides a mechanism of authenticating users.
To configure the gateway for PPPoE, click on Setup and then click on New Connection . The default PPPoE connection setup is displayed. At the Type field select PPPoE and the PPPoE connection setup page is displayed; figure 16 illustrates a typical PPPoE configuration. Give your
PPPoE connection a unique name; the name must not have spaces and cannot begin with numbers. In this case the unique name is called PPPoE1 . Select the encapsulation type (LLC or
VC); if you are not sure just use the default mode. Select the VPI and VCI settings; your DSL service provider or your ISP will supply these; in this case the DSL service provider is using
0,100 . Also select the quality of service (QOS); leave the default value if you are unsure or the
ISP did not provide this information.
Following is a description of the different options: g. Username: The username for the PPPoE access; this is provided by your DSL service provider or your ISP. h. Password: The password for the PPPoE access; this is provided by your DSL service provider or your ISP. i. On-Demand: Enables on-demand mode. The connection will disconnect if no activity is detected after the specified idle timeout value.
25
AT-ARW256E User’s Guide j. Idle Timeout: Specifies that PPPoE connection should disconnect if the link has no activity detected for n seconds. This field is used in conjunction with the On-Demand feature. To ensure that the link is always active, enter a 0 in this field. k. Keep Alive: When on-demand option is not enable, this value specifies the time to wait without being connected to your provider before terminating the connection. To ensure that the link is always active, enter a 0 in this field. l. Set Route: Specify this connection as the default-route. m. MRU: Maximum Receive Unit the DSL connection can receive. It is a negotiated value that asks the provider to send packets of no more than n bytes. The maximum specified value is 1500 although some DSL/ISP providers require a larger value. The minimum MRU value is 128. n. Enforce MRU: Check this box if you experience problems accessing the Internet over a PPPoE connection. This feature will force all TCP traffic to conform with PPP MRU by changing TCP Maximum Segment Size to PPP MRU.
Figure 16 (PPPoE Connection Setup)
To complete the connection you must now click the apply button. The apply button will temporarily save this connection. To make the change permanent you need to click on Save
Setting (at the side of the page). At the system commands page, click on Save All.
5.2.3.4 DHCP Connection Setup
Dynamic Host Configuration Protocol (DHCP) allows the Wireless ADSL Router to automatically obtain the IP address from the server. This option is commonly used in situations where IP is dynamically assigned and is not known prior to assignment.
To configure the Wireless ADSL Router for a DHCP connection, click on Setup and then click on
New Connection . The default DHCP connection setup is displayed. At the Type field select
DHCP and the DHCP connection setup page is displayed; figure 17 illustrates a typical DHCP configuration. Give your DHCP connection a unique name; the name must not have spaces and cannot begin with numbers. In this case the unique name is called DHCP1 . Select the encapsulation type (LLC or VC); if you are not sure just use the default mode. Select the VPI and
VCI settings; your DSL service provider or your ISP will supply these; in this case the DSL service
26
AT-ARW256E User’s Guide provider is using 0,100 . Also select the quality of service (QOS); leave the default value if you are unsure or the ISP did not provide this information.
If your DSL line is connected and your DSL/IPS provider is supporting DHCP, you can click the renew button and the gateway will retrieve an IP address, Subnet mask, and Gateway address.
At anytime, you can renew the DHCP address by clicking on the renew button; in most cases you will never have to use this button.
Figure 17 (DHCP Connection Setup)
To complete the connection you must now click the apply button. The apply button will temporarily save this connection. To make the change permanent you need to click on Save
Settings (at the side of the page). At the system commands page, click on Save All.
5.2.3.5 Static Connection Setup
Static is used whenever a known static IP is assigned. The accompanying information such as the Subnet mask and the gateway should also be specified. Up to three Domain Name Server
(DNS) addresses can also be specified. These servers would enable you to have access to other web servers. Valid IP addresses range is from 0.0.0.0 to 255.255.255.255.
To configure the Wireless ADSL Router for a Static connection, click on Setup and then click on
New Connection . The default Static connection setup is displayed. At the Type field select Static and the Static connection setup page is displayed; figure 18 illustrates a typical Static configuration. Give your Static connection a unique name; the name must not have spaces and cannot begin with numbers. In this case the unique name is called STATIC1 . Select the encapsulation type (LLC or VC); if you are not sure just use the default mode. Select the VPI and
VCI settings; your DSL service provider or your ISP will supply these; in this case the DSL service provider is using 0,100 . Also select the quality of service (QOS); leave the default value if you are unsure or the ISP did not provide this information. You can also enable Network Address
Translation (NAT) and the Firewall options. If you are unsure, leave these in the default mode.
Based upon the information your DSL/ISP provided, enter your assigned IP address, Subnet
Mask, Default Gateway (if provided), and Domain Name Services (DNS) values (if provided). For the static configuration, you can also select a bridge connection or a routed connection. Since static IP address is typically used to host WEB servers, you may want to use a bridge connection.
27
AT-ARW256E User’s Guide
Figure 18 (Static IP Connection Setup)
To complete the connection you must now click the apply button. The apply button will temporarily save this connection. To make the change permanent you need to click on Save
Settings (at the side of the page). At the system commands page, click on Save All.
5.2.3.6 Classical IP over ATM (CLIP, defined in RFC1577) Connection Setup
The Classical IP over ATM (CLIP) support provides the ability to transmit IP packets over an ATM network, CLIP support will encapsulate IP in an AAL5 packet data unit (PDU) frame using
RFC1577and it utilizes an ATM aware version of the ARP protocol (ATMARP. support only allows for PVC support; it does not support SVC).
To configure the Wireless ADSL Router for a CLIP connection, click on Setup and then click on
New Connection . The default CLIP connection setup is displayed. At the Type field select CLIP and the CLIP connection setup page is displayed; figure 19 illustrates a typical CLIP configuration. Give your CLIP connection a unique name; the name must not have spaces and cannot begin with numbers. In this case the unique name is called CLIP1 . Select the VPI and
VCI settings; your DSL service provider or your ISP will supply these; in this case the DSL service provider is using 0,101 . Also select the quality of service (QOS); leave the default value if you are unsure or the ISP did not provide this information. You can also enable Network Address
Translation (NAT) and the Firewall options. If you are unsure, leave these in the default mode.
28
AT-ARW256E User’s Guide
Figure 19 (CLIP Connection Setup)
To complete the connection you must now click the apply button. The apply button will temporarily save this connection. To make the change permanent you need to click on Save
Settings (at the side of the page). At the system commands page, click on Save All.
5.2.4 Modify an Existing Connection
To modify an existing connection, click setup and then click the connection you want to modify.
The connections are listed as Connection 0 through Connection 7
As a note, if you delete the connection, to make the change permanent you need to click on Save
Settings (at the side of the page). At the system commands page, click on Save All.
To configure the DSL modulation type, Click setup. Under WAN Setup, select Modem Setup.
This will bring up the modem setup screen. Leave the default value if you are unsure or the
DSL/ISP did not provide this information. For most all cases, this screen should not be modified.
The apply button will temporarily save this connection. To make the change permanent you need to click on Save Settings (at the side of the page). At the system commands page, click on Save
All.
You can enable or disable Firewall and NAT by clicking on Setup and under LAN Setup, select
Firewall/NAT Services. By unselecting the “Enable Firewall and NAT Services” button the firewall and NAT services is disabled for all WAN connections.
The apply button will temporarily save this connection. To make the change permanent you need to click on Save Settings (at the side of the page). At the system commands page, click on Save
All.
29
AT-ARW256E User’s Guide
5.2.7 UPnP
UPnP NAT and Firewall Traversal allow traffic to pass-thru the Wireless ADSL Router for applications using the UPnP protocol. This feature requires one active DSL connection. In presence of multiple DSL connections, select the one over, which the incoming traffic will be present, for example the default Internet connection.
To enable UPnP, you must first have a WAN connection configured. Once a WAN connection is configured, click Advanced and under Advanced, select UPnP. This will bring up the screen shown in Figure 20. You must enable UPnP and then select which connection will utilize UPnP.
In this case the PPPoA connection is enabled.
Figure 20 (UPNP screen)
The apply button will temporarily save this connection. To make the change permanent you need to click on Save Settings (at the side of the page). At the system commands page, click on Save
All.
This screen will display the Modem status and DSL statistics
Figure 21 (Modem Status screen)
30
AT-ARW256E User’s Guide
5.3 Routes
Routing Table shows the information used by routers when making packet forwarding decisions.
Packets are routed according to the packet's destination IP address.
Figure 22 (Modem Status screen)
If the Wireless ADSL Router is connected to more than one network, you may need to set up a static route between them. A static route is a pre-defined pathway that network information must travel to reach a specific host or network. You can use static routing to allow different IP domain users to access the Internet through the Wireless ADSL Router.
The New Destination IP is the address of the remote LAN network or host to which you want to assign a static route. Enter the IP address of the host for which you wish to create a static route here. For a standard Class C IP domain, the network address is the first three fields of the New
Destination IP, while the last field should be 0. The Subnet Mask identifies which portion of an IP address is the network portion, and which portion is the host portion. For a full Class C Subnet, the Subnet Mask is 255.255.255.0. The Gateway IP address should be the IP address of the gateway device that allows for contact between the Gateway and the remote network or host.
The Hop Count determines the maximum number of steps between network nodes that data packets will travel. A node is any device on the network (such as a router or switch)
To enable Static Routing, from the Home screen, click Advanced and under Advanced, select
Static Routing. Figure 23 illustrates a typical Static Route
Figure 23 (Static Routing)
31
AT-ARW256E User’s Guide
The apply button will temporarily save this connection. To make the change permanent you need to click on Save Settings (at the side of the page). At the system commands page, click on Save
All.
Dynamic Routing allows the Wireless ADSL Router to automatically adjust to physical changes in the network. The Wireless ADSL Router, using the RIP protocol, determines the network packets’ route based on the fewest number of hops between the source and the destination. The RIP protocol regularly broadcasts routing information to other Wireless ADSL Routers on the network.
The Direction determines the direction that RIP routes will be updated. Selecting In means that the Wireless ADSL Router will only incorporate received RIP information. Selecting Out means that the Wireless ADSL Router will only send out RIP information. Selecting both means that the
Wireless ADSL Router will incorporate received RIP information and send out updated RIP information.
The protocol is dependent upon the entire network. Most networks support Rip v1. If RIP v1 is selected, routing data will be sent in RIP v1 format. If Rip V2 is selected, routing data will be sent in RIP v2 format using subnet broadcasting. If Rip V1 Compatible is selected, routing data will be sent in RIP v2 format using multicasting.
To enable Dynamic Routing, click Advanced and under Advanced, select Dynamic Routing.
Figure 24 illustrates a typical Dynamic Route.
Figure 24 (Dynamic Routing)
The apply button will temporarily save this connection. To make the change permanent you need to click on Save Settings (at the side of the page). At the system commands page, click on Save
All.
32
AT-ARW256E User’s Guide
5.4 Security
Using the Port Forwarding page, you can provide local services (for example web hosting) for people on the Internet or play Internet games. When users send this type of request to your network via the Internet, the Wireless ADSL Router will forward those requests to the appropriate
PC. Port forwarding can be used with DHCP assigned addresses but remember that a DHCP address is dynamic (not static). For example, if you were configuring a Netmeeting server, you would want to assign this server a static IP address so that the IP address is not reassigned.
Also remember that if an Internet user is trying to access an Internet application, they must use the WAN IP address. The port forwarding will translate the WAN IP address into a LAN IP address.
To configure a service, game, or other application select the external connection (for example the
Internet connection), from the Home screen, click Advanced and under Advanced, select Port
Forwarding. Next select the computer hosting the service and add the corresponding firewall rule.
If you want to add a custom application, select the User category, click New and fill in the port, protocols and description for your application.
For example, if you want to host a Netmeeting session, from the Home screen, click Advanced and under Advanced, select Port Forwarding. First select the IP address for your Netmeeting server. Next select the Audio/Video category and add Netmeeting to the applied rules box. To view the management rules, highlight Netmeeting and select view; this will display the pre configured protocols and ports that Netmeeting will use. Now assuming that your WAN connection is correct, you can run Netmeeting from your server and call users that are on the
Internet. If you know your WAN IP address, users can call you.
Figure 25 (Port Forwarding)
33
AT-ARW256E User’s Guide
The apply button will temporarily save this connection. To make the change permanent you need to click on Save Settings (at the side of the page). At the system commands page, click on Save
All.
Access control can also be called port blocking. It has the functionality opposite to Port
Forwarding. Specific types of traffic that is destined to a selected LAN IP address can be blocked. To enable any of the Access Control features, click Advanced and under Advanced, select Access Control. A page similar to the port-forwarding page appears. Similar to the portforwarding page, an IP address can be added to a rule. All Access Control rules have precedence over rules that were added via the port-forwarding page.
The example shown in (figure 26) demonstrates that all the ports for this particulate LAN IP is block, the workstation will not be able to access the WAN traffic.
Figure 26 (Access Control screen)
The apply button will temporarily save this connection. To make the change permanent you need to click on Save Settings (at the side of the page). At the system commands page, click on Save
All.
34
AT-ARW256E User’s Guide
IP filter is identical to what Port blocking to Access Control. In (figure 27) it demonstrates that the router will block workstations with the IP in the defined range of 192.168.1.2 to 192.168.1.8 and port range from 2000 to 3000.
Figure 27 (IP Filter screen)
5.4.4 DMZ
5.4.4.1 DMZ configuration
Setting a computer (on your local network) as a DMZ forwards any network traffic that is not redirected to another computer via the port-forwarding feature to the computer's IP address. This opens the access to the DMZ computer from the Internet.
5.4.4.2 Enable Web from WAN
Enabling the Web from WAN on your local network allows Web requests that come from the
Internet to be re-routed to a Web Server that is on a different subnet. This is different that the
Web server rule that is configurable via the port-forwarding page. In this case, the web server is on a different subnet.
5.4.4.3 Enable Remote Telnet
Enabling the Remote Web on your local network allows telnet requests that come from the
Internet to be re-routed to a telnet Server that is on a different LAN IP subnet. This is different that the telnet server rule that is configurable via the port-forwarding page. In this case, the telnet server is on a different subnet.
35
AT-ARW256E User’s Guide
5.4.4.4 Enable Incoming ICMP Ping
Enabling the Incoming Internet Control Message Protocol (ICMP) Ping will allow Echo requests to come into the gateway. The gateway will respond with an ICMP Echo response message. The option allows the DSL provider or ISP to determine the following: a. The status of the network. b. Tracking and isolating hardware and software problems. c. Testing, measuring, and managing networks.
Figure 28 (Advanced Security screen)
The MAC filtering mechanism provides a way for the users to define rules to allow/deny frames through the bridge based on source MAC address, destination MAC address and/or frame type.
When bridge filtering is enabled, each frame is examined against the defined filter rules sequentially, and when a matched is determined, the appropriate filtering action (determined by the access type selected ... i.e. allow or deny) is performed. The user should note that the MAC filter will only examined frames from interfaces that are part of the bridge itself. Twenty filter rules are supported with MAC filtering. To enable MAC Filters, click Advanced and under Advanced, select MAC Filters. Figure 29 illustrates a typical Bridge filter configuration.
The User Interface for MAC Filter allows the user to add/edit/delete, as well as, enables the filter rules. To add rules, simply define the source MAC address, destination MAC address and frame type with desired filtering type (i.e. allow/deny), and press the “Add” button. The MAC address must be in a xx-xx-xx-xx-xx-xx format, with 00-00-00-00-00-00 as “don’t care”. Blanks can be used in the MAC address space, and would be considered also as “don’t care”.
To edit/modify an existing filter rule, select the desired rule created previously from “Add” in the
“Edit” select box. The selected filter rule will appear on top section, as with the “Add” filter rule.
Make the desired change to the MAC address, frame type and/or access type, and press “Apply”.
36
AT-ARW256E User’s Guide
To delete filter rule(s), select the filter rule entry to delete in the “Delete” selection box. Note that multiple deletions are possible. Once all the desired filter rule(s) is/are selected for deletion, press the “Apply” button. The “Select All” select box can also be used to delete the entire filter rule. It provides a quick method of selecting all filter rules for deletion.
The “Enable MAC Filters” button allow the user to enable or disable MAC filtering. It can be set/unset during any add/edit/delete operation. It can also be set/unset independently by just pressing the “Apply” button.
Note: The MAC filter table contains 3 hidden rules. These rules are entered automatically by the system to ensure the user does not "lock" them out of the system. The first rule allows any and all
ARP frames through the system. The second rule allows all IPv4 frames with the destination MAC address of the bridge to go through. The third rule allows all IPv4 frames with the source MAC address of the bridge to go through.
Note: On a windows based machine, to find a MAC address, at a dos prompt type ipconfig /all.
The apply button will temporarily save this connection. To make the change permanent you need to click on Save Settings (at the side of the page). At the system commands page, click on Save
All.
Figure 29 (MAC Filter screen)
37
AT-ARW256E User’s Guide
To add a LAN client, click Advanced and under Advanced, select LAN Clients. If DHCP is used, all DHCP clients are automatically assigned. If a fixed IP address server is on the LAN and you want this server to be visible via the WAN, you must add its IP address. Once the IP address has been added to you can apply Port Forwarding and Access Control rules to this IP address.
The apply button will temporarily save this connection. To make the change permanent you need to click on Save Settings (at the side of the page). At the system commands page, click on Save
All.
Figure 30 (LAN Clients)
38
AT-ARW256E User’s Guide
5.5 Applications
Dynamic DNS allows the user to register with a Dynamic DNS Provider as listed. The dynamic
DNS will be linked with the WAN IP of the router even after the ISP update the WAN IP to another
IP address. It can be useful in web hosting and FTP services.
*note: The Username/Password entered should be similar to the Username/Password you have specified during the registration of the DNS hostname.
Figure 31 (Dynamic DNS)
39
AT-ARW256E User’s Guide
This feature allows the time in the router to be synchronizing with a specified Time server.
The “system log” and “current time” will be able to reflect the updated time upon successfully connected the time server
Figure 32 (System Time)
This feature allows the user to select the (Domain Name Server) DNS Server Priority as well as enter IP addresses for Primary DNS and Secondary DNS.
Figure 33 (DNS Proxy Settings)
40
AT-ARW256E User’s Guide
5.6 Wireless
5.6.1 Wireless Security (Advance)
Enter the IP Address of the RADIUS Server (for 802.1x authentication purposes). This is used only when you have a RADIUS Server and want to use it for authentication. Almost all homes and offices do not have a RADIUS Server.
Figure 34.1 (Wireless Security 802.1x screen)
WPA which stands for WiFi Protected Access. WPA is an industry-supported, pre-standard version of 802.11i utilizing the Temporal Key Integrity Protocol (TKIP), which fixes the problems of WEP, including using dynamic keys.
41
AT-ARW256E User’s Guide
Figure 34.2 (Wireless Security WPA screen)
The Wireless Management consists of Access List, Associated Stations and Multiple SSID features.
5.6.2.1 Access List
This feature permits you to “Allow” or “Ban” any wireless client from accessing the wireless router.
You must add the MAC address of the client’s wireless LAN card.
Note: You must restart the Wireless Access Point to activate the changes for the wireless settings to take effect.
Figure 35.1 (Wireless Management Access List screen)
42
AT-ARW256E User’s Guide
5.6.2.2 Associated Stations
Wireless client which are connected to the wireless router will be displayed in this screen. You are able to ban this station by clicking on the “Ban Station” option. Then click on “Apply” button.
Note: You must restart the Wireless Access Point to activate the changes for the wireless settings to take effect.
Figure 35.2 (Wireless Management Associated Stations screen)
5.6.2.3 Multiple SSID
This router supports multiple SSID, which means that you can set more than one SSID for this router.
Note: You must restart the Wireless Access Point to activate the changes for the wireless settings to take effect.
Figure 35.3 (Wireless Management Multiple SSID screen)
43
AT-ARW256E User’s Guide
5.6.3.1 HTTP Authentication
There are two types of user for this wireless router “Admin” and “Normal”. “Admin” user will be have administrator rights which can have access to “Wizard”, “Basic” and “Advanced” tabs.
However for “Normal” user, they can have access to “Wizard”, “Basic” tabs.
You can change your Wireless ADSL Router’s username and password by clicking on User
Management. From here you can change the login name and password for Admin and Normal
User. You can also change the idle timeout; you will need to log back onto the Wireless ADSL
Router once the timeout expires.
If you forget your password, you can press and hold the reset to factory defaults button for 10 seconds (or more). The Wireless ADSL Router will reset to its factory default configuration and all custom configurations will be lost.
The apply button will temporarily save this connection. To make the change permanent you need to click on Save Settings (at the side of the page). At the system commands page, click on Save
All.
Figure 36 (HTTP Authentication screen)
44
AT-ARW256E User’s Guide
5.6.3.2 Firmware Update
You can upgrade the Wireless ADSL Router’s firmware, clicking on Update Firmware under the
Tools page. This will bring up the screen shown in Figure 37.1. The upgrade file shall be in
*.img format.
To upgrade the firmware, click browse, find the firmware file to download. Make sure this is the correct file. Click on upgrade firmware (as shown in Figure 37.1). Once the upgrade is complete the Wireless ADSL Router will reboot. You will need to log back onto the Wireless ADSL Router after the firmware upgrade is completed.
The firmware upgrade should take about 5 minutes to complete.
Note: Do not remove power from the Wireless ADSL Router during the firmware upgrade procedure.
Figure 37.1 (Firmware Update screen)
5.6.3.3 Restore Default Settings
Restore Defaults: Use this button to restore factory default configuration.
NOTE: Connectivity to the router will be lost. You will be re-connected to the router after the unit reboots.
Figure 37.2 (Restore Default Settings screen)
45
AT-ARW256E User’s Guide
5.6.3.4 Restart Router
Use this button to re-start the system. If you have not saved your configurations, the Wireless
ADSL Router will revert back to the previously saved configuration upon re-starting.
NOTE: Connectivity to the unit will be lost. You can reconnect after the unit reboots
Figure 37.3 (Restart Router screen)
5.6.3.5 System Log
You can display the Wireless ADSL Router’s log by going under the Status title, click System log.
From here you can view all logged information. Depending upon the severity level, this logged info will generate log reports to a remote host (if remote logging is enabled).
Figure 37.4 (System Log screen)
46
AT-ARW256E User’s Guide
6. Appendix A: Troubleshooting
Below is a list of commonly asked questions. Before calling technical support, please look through these issues to see if they help to solve your problem.
6.1 The Wireless ADSL Router is not functional
1.
2.
3.
4.
5.
6.
7.
8.
Check to see that the power LED is green and than the network cables are installed correctly. Refer to the easy start guide for more details.
Check to see that the ETH and Internet LEDs are green.
Check to see that the DSL LED is green
Check the settings on your PC. Again, refer to the easy start guide for more details
Check the Wireless ADSL Router’s settings.
From your PC, can you PING the Wireless ADSL Router? Assuming that the
Wireless ADSL Router has DHCP enabled and your PC is on the same subnet as the gateway, you should be able to PING the gateway.
Can you PING the WAN IP? Your ISP should have provided the IP address of their server. If you can ping the Wireless ADSL Router and your protocols are configured correctly, you should be able to ping the ISPs network. If you cannot PING the ISPs network, make sure you are using the correct protocols with the correct VPI/VCI values.
Make sure NAT is enabled for your connection. If NAT is disabled the Wireless
ADSL Router will not route frames correctly (except in Bridge connection).
6.2 I can’t connect to the Wireless ADSL Router.
1.
2.
3.
4.
5.
Check to see that the power LED is green and that the network cables are installed correctly; see the easy start guide for more details.
Make sure that your PC and the Wireless ADSL Router is on the same network segment. The Wireless ADSL Router’s default IP address is 192.168.1.1. If you are running a Windows based PC, you can open a DOS window and type
IPCONFIG; make sure that the network adapter that is connected to the gateway is within the same 192.168.1.x subnet.
Also, your PC’s Subnet Mask should match the gateways subnet mask. The gateway has a default subnet mask of 255.255.255.0.
If this still does not work, press the reset button for 10 seconds. This will place the gateway into its factory default state. Go through the above procedures again.
Make sure NAT is enabled for your connection. If NAT is disabled the Wireless
ADSL Router will not route frames correctly (except in Bridge connection).
6.3 The DSL Link LED continues to blink but does not go solid
1. This means that the DSL line is trying to train but for some reason it cannot establish a valid connection. The main cause of this is that you are too far away from the central office. Contact your DSL service provider for further assistance.
2. Verify that the phone line is connected directly to the wall and to the line input on the
Wireless ADSL Router.
3. Make sure that for every parallel phone line connected to telephone or fax to install with a micro filter.
Common Problems and Solutions
47
AT-ARW256E User’s Guide
6.4 The DSL Link LED is always off
1. Make sure you have DSL service. You should get some kind of information from your ISP that states that DSL service is installed. You can usually tell if the service is installed by listening to the phone line; you will hear some high-pitched noise. If you do not hear high-pitched noise, contact your ISP.
2.
Verify that the phone line is connected directly to the wall and to the line input on the
Wireless ADSL Router. If the phone line is connected to the phone side of the
Wireless ADSL Router or you have a splitter installed on the phone line, the DSL light will not come on.
48
AT-ARW256E User’s Guide
7. Wireless ADSL Router Terms
What is DSL?
DSL which is short for Digtal Subscriber Line is a technology that increases the digital capacity of a ordinary telephone line into home of office and , because it is utilitsing the unused bandwidth, the line allows normal phone usage and signal to be for broadband to be used at the same time.
DSl has the capability to impart “always-connected” services, thus eliminating the need to dial in to the service
What is a firewall?
A firewall is protection between the Internet and your local network. It acts similarly to the firewall in your car, protecting the interior of the car from the engine. Your car's firewall has very small opening that allow desired connections from the engine into the cabin (gas pedal connection, etc), but if something happens to your engine, you are protected.
The firewall in the Wireless ADSL Router is very similar. Only the desired connections that you allow are passed through the firewall. These connections are normally originating from the local network; such as web browsing, checking your email, downloading a file, and playing a game.
However, in some cases, you can allow incoming connections so that you can run programs like a web server.
What is NAT?
NAT stands for Network Address Translation. Another name for it is Connection Sharing. What does this mean? Your ISP provides you with a single network address for you to access the
Internet through. However, you may have several machines on your local network that want to access the Internet at the same time. The Wireless ADSL Router provides NAT functionality that converts your local network addresses to the single network address provided by your ISP. It keeps track of all these connections and makes sure that the correct information gets to the correct local machine.
Occasionally, there are certain programs that don't work well through NAT. Some games, and some specialty applications have a bit of trouble. The Wireless ADSL Router contains special functionality to handle the vast majority of these troublesome programs and games. NAT does cause problems when you want to run a SERVER though. When running a server, please see the
DMZ section below.
What is a DMZ?
DMZ really stands for Demilitarized Zone. It is a way of separating out part of your local network so that is more open to the Internet. Suppose that you want to run a web-server, or a game server. Normal servers like these are blocked from working by the NAT functionality. The solution is to "isolate" the single local computer into a DMZ. This makes the single computer look like it is directly on the Internet, and others can access this machine.
Your machine isn't really directly connected to the Internet, and it really has an internal local network address. When you provide the servers network address to others, you must provide the address of the Wireless ADSL Router. The Wireless ADSL Router "fakes" the connection to your machine.
You should use the DMZ when you want to run a server that others will access from the Internet.
Internal programs and servers (like print servers, etc) should NOT be connected to the DMZ
What is a Gateway?
The Internet is so large that a single network cannot handle all of the traffic and still deliver a reasonable level of service. To overcome this limitation, the network is broken down into smaller segments or subnets that can deliver good performance for the stations attached to that segment.
This segmentation solves the problem of supporting a large number of stations, but introduces the problem of getting traffic from one subnet to another.
To accomplish this, devices called routers or gateways are placed between segments. If a machine wishes to contact another device on the same segment, it transmits to that station directly using a simple discovery technique. If the target station does not exist on the same segment as the source station, then the source actually has no idea how to get to the target.
49
AT-ARW256E User’s Guide
One of the configuration parameters transmitted to each network device is its default gateway.
This address is configured by the network administrators and it informs each personal computer or other network device where to send data if the target station does not reside on the same subnet as the source. If your machine can reach all stations on the same subnet (usually a building or a sector within a building), but cannot communicate outside of this area, it is usually because of an incorrectly configured default gateway.
What is SSID ?
A service set identifier (SSID) is a sequence of characters that uniquely names a wireless local area network (
WLAN
). This name allows stations to connect to the desired network when multiple independent networks operate in the same physical area
What is WEP ?
Wired Equivalent Privacy (WEP) is a security protocol, specified in the
IEEE
Wireless Fidelity (
Wi-
Fi
) standard,
802.11
b, that is designed to provide a wireless local area network (
WLAN
) with a level of security and privacy comparable to what is usually expected of a wired LAN. A wired local area network (
LAN
) is generally protected by physical security mechanisms (controlled access to a building, for example) that are effective for a controlled physical environment, but may be ineffective for WLANs because radio waves are not necessarily bound by the walls containing the network. WEP seeks to establish similar protection to that offered by the wired network's physical security measures by encrypting data transmitted over the WLAN. Data encryption
protects the vulnerable wireless link between client s and access points; once this measure has been taken, other typical LAN security mechanisms such as password protection, end-to-end encryption, virtual private networks ( VPN s), and authentication can be put in place to ensure privacy.
50
advertisement
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project