Enable DHCP Server

To enable the DHCP Server on an interface, click on

Servers

in the menu bar, and then

click

DHCP Server

below it.

Follow these steps to enable the DHCP Server on the LAN interface.

Step 1.

Choose the LAN interface from the Available interfaces list.

Step 2.

Enable by checking the

Use built-in DHCP Server

box.

Step 3.

Fill in the IP Span, the start and end IP for the range of IP addresses that the DFL-

1100 can assign.

Step 4.

Fill in the DNS servers DHCP server will assigns to the clients, at least one should

be provided. If the DNS relayer is configured the DHCP server can assign those.

Step 5.

Optionally type in the WINS servers the DHCP server assigns to the clients.

Step 6.

Optionally type in the domain that the DHCP server assigns to the clients.

Step 7.

Choose for how long the DHCP server will give out leases before the client have

to renew them.

Click the

Apply

button below to apply the setting or click

Cancel

to discard changes

Enable DHCP Relay

To enable the DHCP Relay on an interface, click on

Servers

in the menu bar, and then

click

DHCP Server

below it.

Follow these steps to enable the DHCP Relayer on the LAN interface.

Step 1.

Choose the LAN interface from the Available interfaces list.

Step 2.

Enable by checking the

Relay DHCP Requests to other DHCP server

box.

Step 3.

Fill in the IP of the DHCP Server; note that it should be on another interface then

where the DHCP request is coming from, i.e. a server on the DMZ.

Click the

Apply

button below to apply the setting or click

Cancel

to discard changes

Disable DHCP Server/Relayer

To disable the DHCP Server on an interface, click on

Servers

in the menu bar, and then

click

DHCP Server

below it.

Here click on the interface that you want to disable the DHCP

server or relayer on.

Follow these steps to disable the DHCP Server or Relayer on the LAN interface.

Step 1.

Choose the LAN interface from the Available interfaces list.

Step 2.

Disable by checking the

No DHCP processing

box.

Click the

Apply

button below to apply the setting or click

Cancel

to discard changes

72

DNS Relayer Settings

Click on

Servers

in the menu bar, and then click

DNS Relay

below it. The DFL-1100

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-1100 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.

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.

74

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.

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.