Page

24

Step 1.

Select DDNS service provider.

ZSR0104C SERIES supports two DDNS service providers,

www.no-ip.com

or

www.dyndns.org

. Browse the DDNS service provider’s web page and register a new

account there. Your DDNS service provider will provide you the account ID and

password.

Step 2.

Go through the DDNS settings in ZSR0104C SERIES DDNS section.

Select one DDNS

service provider, and fill in the necessary information form DDNS service provider such

as ID, password, and related settings etc.

If no-ip.com was selected, User Name and Password are mandatory; one or both of Host

Name and Group Name have to be entered.

Downloaded from

www.Manualslib.com

manuals search engine

Page

25

If dyndns.org was selected, User Name, Password and Host Name are mandatory; Enable

Wildcard, Mail Exchanger and Backup MX are optional.

Step 3.

Update the IP address.

When WAN public IP address changes, ZSR0104C SERIES will

automatically inform your DDNS service provider the new IP address, or you can force

the IP address update by clicking the

Update

button.

The update message will show on the screen if the

Refresh

button was clicked. For

example, the status will show “

No DDNS update activity

” after clicking the

Refresh

button.

5.8 DHCP Server

1. DHCP Definition

DHCP is the acronym of

Dynamic Host Configuration Protocol

. It can automate the IP Address

allocation in the network. When this protocol is activated, a DHCP server can automatically assign

the IP addresses to the DHCP clients. Also, a DHCP client can automatically obtain its IP addresses

from the DHCP server.

2. DHCP Server in LAN

By default, ZSR0104C SERIES works as a DHCP server and automatically assigns the IP addresses

to each client PC on the LAN side.

A.

Auto-Remember

When assigning IP addresses to LAN clients, ZSR0104C SERIES can remember each LAN

client’s IP address corresponding to the client’s MAC address. Thus the LAN client will

Downloaded from

www.Manualslib.com

manuals search engine

Page

26

receive the same LAN IP address, when ZSR0104C SERIES assigns IP addresses in the next

time.

B.

The Pool Range of Assigned IP Address

When DHCP is enabled, you can assign a group of LAN IP addresses. The group is called as

“the pool.” You can enter numbers from 2 to 254 in the blanks. The maximum capacity is 253

IP addresses. The number behind “

Starting

” must be smaller than that behind “

Ending

”. You

can specify the domain name for the group of LAN IP addresses, which are managed by the

DHCP server. Click the button

Apply

to make your settings take effect.

C.

The DHCP IP Address Lease Time

The DHIP IP can use time .If choice one day, the get IP after one day, will be release and

renew new IP.

3. DHCP Client in LAN

When DHCP is enabled in both ZSR0104C SERIES and the LAN clients, the LAN PC client can

automatically obtain the IP settings, including IP address, Domain Name, Subnet Mask, Primary

DNS, and Secondary DNS from ZSR0104C SERIES.

4.

Static IP Assign

When DHCP is enabled, the NAT can assign the fixed IP according to Mac address.

Downloaded from

www.Manualslib.com

manuals search engine

Page

27

5.

DHCP Client List

When DHCP is enabled. Will see how many DHCP clients get IP address form the NAT.

If you want to enable DHCP in your PC, refer to

A.1

Enable DHCP in Your PC

in

Appendix A:

Configure TCP/IP in Your PC

.

5.9 Virtual Server (Port Forwarding)

The firewall in ZSR0104C SERIES blocks the traffic initiated from the Internet in order to protect

your LAN. However, ZSR0104C SERIES can provide tunnel service and forward the Internet

service packet specified with a port number to the server specified by a LAN IP address. In other

words, ZSR0104C SERIES can open the port for the service with specified port number and then

“

forward

” the port to the server specified by a LAN IP address. This function is called as “Virtual

Server” or “Port Forwarding”.

Downloaded from

www.Manualslib.com

manuals search engine

Page

28

As illustrated as above, when ZSR0104C SERIES obtains traffic of Port 21 from the Internet, it will

forward it to the FTP server with LAN IP address 192.168.1.2. If ZSR0104C SERIES receives

traffic of Port 80, it will re-direct it to the Web server with LAN IP 192.168.0.3.

To enable Virtual server, enter the port number to specify the service type, and the server’s LAN IP

address for the traffic destination. Check

Enable

. Then click the button

Apply

to make your

settings take effect. For the information of port number and the corresponding service, please refer

to

Appendix B: Common Port Numbers

.

Downloaded from

www.Manualslib.com

manuals search engine