DNS Relayer Settings

Click on

Servers

in the menu bar, and then click

DNS Relay

below it. The DFL-200

contains a DNS relayer that you can be configured to relay DNS queries from the internal LAN

to the DNS servers used by the firewall itself.

Enable DNS Relayer

Follow these steps to enable the DNS Relayer.

Step 1.

Enable by checking the

Enable DNS Relayer

box.

Step 2.

Enter the IP numbers that the DFL-200 should listen for DNS queries on.

Note:

If “Use address of LAN interface” is checked, you don’t have to enter an IP in IP

Address 1 as the firewall will know what address to use.

Click the

Apply

button below to apply the setting or click

Cancel

to discard changes.

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Disable DNS Relayer

Follow these steps to disable the DNS Relayer.

Step 1.

Disable by un-checking the

Enable DNS Relayer

box.

Click the

Apply

button below to apply the setting or click

Cancel

to discard changes.

Tools

Ping

Click on

Tools

in the menu bar, and then click

Ping

below it. This tool is used to send a

specified number of ICMP Echo Request packets to a given destination. All packets are sent

in immediate succession rather than one per second. This behavior is the best one suited for

diagnosing connectivity problems.

•

IP Address

– Target IP to send the ICMP Echo Requests to.

•

Number of packets

– Number of ICMP Echo Request packets to send, up to 10.

•

Packet size

– Size of the packet to send, between 32 and 1500 bytes.

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Ping Example

In this example, the

IP Address

is 192.168.10.1 the

Number of packets

is five, after

clicking on

Apply

the firewall will start to send the ICMP Echo Requests to the specified IP.

After a few seconds the result will be shown, in this example only four out of five packets was

received back, a 20% packet loss, and the average time for the packets to travel to and from

the specified IP was 57 ms.

Dynamic DNS

The

Dynamic DNS

(require Dynamic DNS Service) allows you to alias a dynamic IP

address to a static hostname, allowing your device to be more easily accessed by specific

name. When this function is enabled, the IP address in Dynamic DNS Server will be

automatically updated with the new IP address provided by ISP.

Click DynDNS in the Tools menu to enter Dynamic DNS configuration.

The firewall provides a list of a few predefined DynDNS service providers; users have to

register with one of these providers before trying to use this function.

Add Dynamic DNS Settings

Follow these steps to enable Dynamic DNS.

Step 1.

Go to Tools and DynDNS.

Step 2.

Choose what Dynamic DNS service you would like to use, and fill in the needed

information, username and password in all cases and domains in all but cjb.net.

Click the

Apply

button below to apply the setting or click

Cancel

to discard changes.

Backup

Click on

Tools

in the

menu bar,

and

then

click

Backup

below it.

Here

a

administrator

can backup and restore

the configuration. The

configuration file stores

system

settings,

IP

addresses of Firewall’s

network

interfaces,

address table, service

table, IPSec

settings,

port

mapping

and

policies.

When

the

configuration process is

completed,

system

administrator

can

download

the

configuration

file

into

local disc as a backup.

System

Administrators

can restore the firewall’s configuration file with the one stored on disc.

Exporting the DFL-200’s Configuration

Follow these steps to export the configuration.

Step 1.

Under the

Tools

menu and the

Backup

section

,

click on the Download

configuration button.

Step 2.

When the File Download pop-up window appears, choose the destination place in

which to save the exported file. The Administrator may choose to rename the file if

preferred.

Restoring the DFL-200’s Configuration

Follow these steps to restore the configuration.

Step 1.

Under the

Tools

menu and the

Backup

section, click on the

Browse

button next

to the empty field. When the

Choose File

pop-up window appears, select the file to which

contains the saved firewall settings, then click

OK

.

Step 2.

Click

Upload Configuration

to import the file into the Firewall.