DGFV338 ProSafe Wireless ADSL Modem VPN Firewall Router Reference Manual

Basic Installation and Configuration

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•

MTU Size.

The normal MTU value for most networks is 1500 Bytes, or 1492 for PPPoE

connections. For some ISPs, you may need to reduce the MTU size. However, this is rarely

required and should not be attempted unless you are sure it is necessary for your ISP

connection.

•

Port Speed (Ethernet only)

. Usually, your router can automatically determine the connection

speed of the 10/100 port. If you cannot establish an Internet connection and the Internet LED

blinks continuously, manually select the port speed.

If you know your Ethernet port on your broadband modem supports 100BaseT, select 100M;

otherwise, select 10M. Use the half-duplex settings unless you are sure you need full duplex.

•

Router MAC Address

. Each computer or router on your network has a unique 32-bit local

Ethernet address, known as the Media Access Control (MAC) address. In most cases the

default Use Default Address will suffice. If your ISP requires MAC authentication, then select

either:

–

Use This Computer’s MAC address, where the router will use the MAC address of the

computer you are now using, or

–

Use This MAC Address, where you manually enter the MAC address that your ISP

expects. The format is XX:XX:XX:XX:XX:XX.

If you set up an ADSL connection, in addition to the Advanced ADSL settings, there are some

additional specific ADSL settings that also should be configured. These include: Multiplexing

Method, VPI and VCI.

To configure your ADSL settings:

1.

Click he

ADSL Settings

link at the top of the

ADSL ISP Settings

screen. The

ADSL Settings

screen will display.

2.

Configure your ADSL Settings. If you don’t know your settings, contact your ISP. These

parameters must be submitted to correctly establish a DSL connection on the WAN interface:

a.

Multiplexing Method: Both VC-BASED multiplexing and LLC-BASED multiplexing

methods are supported.

Figure 2-6

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b.

VPI (Virtual Path Identifier) value: This is provided by your ISP to identify the ATM

network (in conjunction with the VCI value).

c.

VCI (Virtual Channel Identifier) value: This is provided by your ISP (in conjunction with

the VPI value) to identify the ATM network.

3.

Click

Apply

to save your settings.

To configure your Advanced ADSL ISP Settings:

1.

Click the

Advanced

link at the tops of the

ADSL ISP Settings

screen. The

ADSL Advanced

Options

screen will display.

2.

Enter the

MTU Size

. The MTU (Maximum Transmit Unit) is the size of the largest packet that

can be sent over the network. The standard MTU value for Ethernet networks is usually 1500

Bytes and for PPPoE connections, it is 1492 Bytes. Unless a change is required by your ISP, it

is recommended that the MTU values be left as is.

3.

Enter the

Router's MAC Address.

Similar to other Ethernet devices, the router has its own

48-bit local Ethernet address, also referred to as the MAC (Media Access Control) address.

The default is set to Use default address.

–

If your ISP requires MAC authentication and another MAC address has been previously

registered with your ISP, then select either Use this Computer's MAC address to assign the

MAC address of the computer through which you are accessing the router.

–

Select Use This MAC Address and manually type in the MAC address expected by your

ISP.

Figure 2-7

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The format for the MAC address is XX:XX:XX:XX:XX:XX where X is a number from 0 to 9

(inclusive) or an alphabetical letter between A and F (inclusive).

4.

Click

Apply

to save the settings. Click

Reset

to revert to the previous settings.

To configure you Ethernet ISP Advanced options:

1.

Select the

Advanced

link at the top of the

Ethernet ISP Settings

screen. The4

Ethernet

Advanced Options

screen will display.

2.

Enter the

MTU Size.

The MTU (Maximum Transmit Unit) is the size of the largest packet that

can be sent over the network. The standard MTU value for Ethernet networks is usually 1500

Bytes and for PPPoE connections, it is 1492 Bytes. Unless a change is required by your ISP, it

is recommended that the MTU values be left as is.

3.

Enter your

Port Speed.

Most new devices with Ethernet ports run at full-duplex, 100Mbps

modes. The router can automatically negotiate the speed with the other end of the Ethernet

connection. However, if the Internet LED blinks continuously, you may need to set the port

speed manually. This could occur with some older broadband modems. If the Ethernet port of

the broadband modem supports 100BaseT, select 100BaseT; otherwise, select 10BaseT. Use

the half-duplex settings if full-duplex modes do not function properly.

4.

Enter the

Router's MAC Address.

The router has its own 48-bit local Ethernet address, also

referred to as the MAC (Media Access Control) address. The default is set to Use default

address. If your ISP requires MAC authentication and another MAC address has been

previously registered with your ISP, then select either Use this Computer’s MAC address to

assign the MAC address of the computer through which you are accessing the router, or select

Use This MAC Address and manually type in the MAC address expected by your ISP. The

format for the MAC address is XX:XX:XX:XX:XX:XX where X is a number from 0 to 9

(inclusive) or an alphabetical letter between A and F (inclusive).

Figure 2-8

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5.

Click

Apply

to save your settings.

Configuring the WAN Mode

The WAN ports of the ProSafe Wireless ADSL Modem VPN Firewall Router can be configured

for NAT or Classical Routing. You must select one of them—NAT being the most common:

•

NAT

. NAT is the technology which allows all PCs on your LAN to share a single Internet IP

address. From the Internet, there is only a single device (the Router) and a single IP address.

PCs on your LAN can use any private IP address range, and these IP addresses are not visible

from the Internet.The Router uses NAT to select the correct PC (on your LAN) to receive any

incoming data.

•

Classical Routing

. In this mode, the Router performs Routing, but without NAT. To gain

Internet access, each PC on your LAN must have a valid Internet IP address.

If your ISP has allocated many IP addresses to you, and you have assigned one of these

addresses to each PC, you can choose Classical Routing. Or, you can use Classical Routing for

routing private IP addresses within a campus environment. Otherwise, selecting this method

will not allow Internet access through this Router.

Depending on the WAN port configuration of the ProSafe DGFV338, you can select one of two

options:

•

Auto-Rollover using WAN port

. If you have configured both the ADSL ISP and Ethernet ISP

WAN ports of the ProSafe Wireless ADSL Modem VPN Firewall Router, you can select auto-

rollover for increased system reliability. In this mode, the selected WAN interface is made

primary and the other is the rollover link. As long as the primary link is up, all traffic is sent

over the primary link. Once the primary WAN interface goes down, the rollover link is brought

up to send the traffic.

Note:

You can also set up the traffic meter for the Ethernet ISP, if desired, at this time.

See

“Programming the Traffic Meter” on page 2-20

.

Note:

If you only have a single Internet IP address, you MUST use NAT.

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•

Use Dedicated WAN port.

–

Dedicated ADSL

. If you have configured only the ADSL ISP, then select this interface. In

this mode the ADSL interface will always be active and all traffic will be sent over this

link; the other link will always be down. No link failure detection will occur.

–

Dedicated Ethernet.

If this is your only ISP configuration, then select Dedicated

Ethernet. In this mode the Ethernet interface will always be active and all traffic will be

sent over this link; the other link will always be down. No link failure detection will occur.

WAN failure is detected using DNS queries to a DNS server, or a Ping to an IP address. For each

WAN interface, DNS queries or Ping requests are sent to the specified IP address. If replies are not

received, the corresponding WAN interface is considered down.

•

DNS lookup using WAN DNS Servers (ISP DNS Servers).

In this case, DNS queries are

sent to the DNS server configured on the ADSL and Ethernet ISP pages (see

“Configuring

Your Internet Connection using Auto Detect” on page 2-4

).

•

DNS lookup using this DNS Server (for example, a public DNS Server)

, As an option, you

can enter any public DNS server address. DNS queries are sent to this server through the WAN

interface being monitored.

•

Ping to this IP address

. Enter a public IP address that will not reject the Ping request or will

not consider the traffic abuse. Queries are sent to this server through the WAN interface being

monitored.

•

Test Period

. DNS query is sent periodically after every test period. The default test period is

30 seconds.

•

Failover

. The WAN interface is considered down after the configured number of queries have

failed to elicit a reply from the configured DNS server or from the Ping destination. The

minimum number of failed queries is two. The rollover link is brought up after this, if Auto-

Rollover has been selected.

To configure the WAN mode:

1.

Select

Network Configuration

from the main menu and

WAN Mode

from the submenu. The

WAN Mode screen will display.

2.

Select either the

NAT

or

Classical Routing

radio button. If you have a single Internet address,

you must use NAT.