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Page 71 / 139 Scroll up to view Page 66 - 70
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
Page 72 / 139
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.
Page 73 / 139
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.
Page 74 / 139
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.
Page 75 / 139
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.

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