16

WAN Interface Settings – Using Static IP

If you are using

Static IP

you have

to fill in the IP address information

provided to you by your ISP. All fields

are required except the Secondary

DNS Server. You should probably not

use the numbers displayed in these

fields, they are only used as an

example.

•

IP Address

– The IP

address

of

the

WAN

interface.

This

is

the

address that may be used to ping the firewall, remotely control it and be used as

source address for dynamically translated connections.

•

Subnet Mask

– Size of the external network.

•

Gateway IP

– Specifies the IP address of the default gateway used to reach for

the Internet.

•

Primary and Secondary DNS Server

– The IP addresses of your DNS servers,

only the Primary DNS is required.

WAN Interface Settings – Using DHCP

If you are using

DHCP

there is no

need to enter any values in any of

fields.

WAN Interface Settings – Using PPPoE

Use the following procedure to

configure the DFL-1100 external

interface to use PPPoE (Point-to-Point

Protocol over Ethernet). This

configuration is required if your ISP

uses PPPoE to assign the IP address

of the external interface. You will have

to fill the username and password

provided to you by your ISP.

•

Username

– The login or

username supplied to you

by your ISP.

•

Password

– The

password supplied to you by your ISP.

•

Service Name

– When using PPPoE some ISPs require you to fill in a Service

Name.

•

Primary and Secondary DNS Server

– The IP addresses of your DNS servers,

these are optional and are often provided by the PPPoE service.

18

WAN Interface Settings – Using PPTP

PPTP over Ethernet connections

are used in some DSL and cable

modem networks.

You need your account details, and

possibly also IP configuration

parameters of the actual physical

interface that the PPTP tunnel runs

over. Your ISP should supply this

information.

•

Username

– The login or

username supplied to you

by your ISP.

•

Password

– The

password supplied to you

by your ISP.

•

PPTP Server IP

– The IP

of the PPTP server that

the DFL-1100 should

connect to.

Before PPTP can be used to connect to you ISP the physical (WAN) interface parameters

need to be supplied, it’s possible to use either

DHCP

or

Static IP

, this depends on the type of

ISP used and this information should be supplied by them.

If using static IP, this information need to be filled in.

•

IP Address

– The IP address of the

WAN

interface. This IP is used to connect to

the PPTP server.

•

Subnet Mask

– Size of the external network.

•

Gateway IP

– Specifies the IP address of the default gateway used to reach for

the Internet.

WAN Interface Settings – Using BigPond

The ISP Telstra BigPond uses

BigPond for authentication; the IP is

assigned with DHCP.

•

Username

– The login or

username supplied to you

by your ISP.

•

Password

– The

password supplied to you

by your ISP.

Traffic Shaping

When

Traffic Shaping

is enabled and the correct maximum up and downstream

bandwidth is specified it’s possible to control which policies have the highest priority when

large amounts of data are moving through the DFL-1100. For example, the policy for the web

server might be given higher priority than the policies for most employees' computers.

You can use traffic shaping to guarantee the amount of bandwidth available through the

firewall for a policy. Guarantee bandwidth to make sure that there is enough bandwidth

available for a high-priority service. You can also use traffic shaping to limit the amount of

bandwidth available through the firewall for a policy. Limit bandwidth to keep less important

services from using bandwidth needed for more important services.

Note:

If the limit is set too high, i.e. higher then your Internet connection, the traffic

shaping will not work at all.

20

MTU Configuration

To improve the performance of your Internet connection, you can adjust the maximum

transmission unit (MTU) of the packets that the DFL-1100 transmits from its external interface.

Ideally, you want this MTU to be the same as the smallest MTU of all the networks between

the DFL-1100 and the Internet. If the packets the DFL-1100 sends are larger, they get broken

up or fragmented, which could slow down transmission speeds.

Trial and error is the only sure way of finding the optimal MTU, but there are some

guidelines that can help. For example, the MTU of many PPP connections is 576, so if you

connect to the Internet via PPPoE, you might want to set the MTU size to 576. DSL modems

may also have small MTU sizes. Most ethernet networks have an MTU of 1500.

Note:

If you connect to your ISP using DHCP to obtain an IP address for the external

interface, you cannot set the MTU below 576 bytes due to DHCP communication

standards.

Click the

Apply

button below to apply the setting or click Cancel to discard changes.