DDNS (Dynamic Domain Name Server) is designed to resolve fixed domain names to dynamic IP addresses. Generally you will be allocated with a dynamic IP address from ISP each time you connect to the Internet, i.e., the allocated IP addresses for different Internet connections will vary. DDNS can bind the domain name to your dynamic IP address, and the binding between them will be updated automatically each time you connect to the Internet.
In order to enable DDNS, you will have to register in a DDNS provider to obtain a dynamic domain name. Hillstone devices support the following 5 DDNS providers, and you can visit one of the following websites to complete the registration:
- dyndns.org: http://dyndns.com/dns
- 3322.org: http://www.pubyun.com
- no-ip.com: http://www.noip.com
- Huagai.net: http://www.ddns.com.cn
- ZoneEdit.com: http://www.zoneedit.com
Configuring a DDNS
To create a DDNS, take the following steps:
- Select Network > DDNS.
- Click New.
In the DDNS Configuration page, configure as follows:
Option Description DDNS Name Specifies the name of DDNS. Interface Specifies the interface to which DDNS is applied. Hostname Specifies the domain name obtained from the DDNS provider. Provider Provider Specifies a DDNS provider. Choose one from the drop-down list. Server Name Specifies a server name for the configured DDNS. Server Port Specifies a server port number for the configured DDNS. The value range is 1 to 65535. User User Name Specifies the user name registered in the DDNS provider. Password Specifies the corresponding password. Confirm Password Enter the password again to confirm. Update Interval Minimum Update Interval When the IP address of the interface with DDNS enabled changes, system will send an update request to the DDNS server. If the server does not respond to the request, system will send the request again according to the configured min update interval. For example, if the minimum update interval is set to 5 minutes, then system will send the second request 5 minutes after the first request failure; if it fails again, system will send the third request 10 (5x2) minutes later; if it fails again, and system will send the forth request 20 (10*2) minutes later, and so forth. The value will not increase anymore when reaching 120 minutes. That is, system will send the request at a fixed interval of 120 minutes. The default value is 5. Maximum Update Interval In case the IP address has not changed, system will send an update request to the DDNS server at the maximum update interval. Type the maximum update interval into the box. The value range is 24 to 8760 hours. The default value is 24.
- Click OK.