Domain name resolution problems

What is DNS?

DNS is the technology that ties text-based domain names to the numeric IP Addresses that are necessary to locate the domain's server on the net

What is the wild-card DNS?

A wildcard DNS record is a record in a DNS zone that will match requests for non-existent domain names. A wildcard DNS record is specified by using a "*" as the leftmost label (part) of a domain name. E.g. the exact rules for when a wild card will match are specified in RFC 1034, but the rules are neither intuitive nor clearly specified. This has resulted in incompatible implementations and unexpected results when they are used.

Differences between of DNS and wild-card DNS?

Wild-card DNS is: domain name analyze to the same IP.
DNS are sub-domain name, domain name analyze to the same IP.

What is the multi-level sub- wild-card DNS and multi-level Chinese sub wild-card DNS?

For example, your domain name is””, you can set from VDNS system, For example:

What type of domain round robin?

Our company provided domain round robin by the era, including the main domain round robin, wild-card-domain round robin, Multi-level sub-domain round robin. You can start domain round robin by the VDNS system

Main domain name resolution: the A record is: and

Wild-card-domain round robin: *. the A record is: and

Multi-level sub-domain round robin: *. the A record is: and

Multi-level Chinese sub wild-card domain round robin:*.中国.广东.com the A record is: and

Differences between of DNS modification and DNS?

DNS modification and DNS is absolute different.

DNS modification is the DNS server (Domain Name System) changed.

If you own a separate DNS server, want to resolve this DNS domain name has been registered successfully, you can choose to modify the DNS service (Note: To change the DNS domain name must be in my company has been successfully registered or transferred to my company's domain name). Please visit the Member Area - Domain Name Service - Domain Management - click on the name change at the change-DNS DNS information for your domain name

Why MX records behind the decimal point is set wrong?

MX records add points are correct at the end. MX is Mail Exchange records, documents exist in the domain name in DNS for the domain at the end of the e-mail to a post office mail server handling the corresponding point.

Set as follows Customer : login -> click on "Product Management” in the "domain management " -> select the relevant domain name -> click on "Integrated DNS" to enter setup the interface, RR fields can be empty or sub domain name, type, select the MX-MX records Values can fill in the host name or IP address and click the Add button.

Note: MX records require the host name or IP address of the end point must be added, otherwise the record will not take effect, if not add a little when you submit, our system will automatically add.

Differences of between VDNS20 and VDNS unlimited?

Our VDNS system is global leader in DNS technology, VDNS20 and VDNS are two of different systems

VDNS20 can support 20 sub-domain names.VDNS unlimited can be set to 35 sub-domain name. Such as support the IDN standard internationalized domain.

What is round robin DNS?

A load balancing technique in which balance power is placed in the DNS server instead of a strictly dedicated machine as other load techniques do.

Round robin works on a rotating basis in that one server IP address is handed out, then moves to the back of the list; the next server IP address is handed out, and then it moves to the end of the list; and so on, depending on the number of servers being used. This works in a looping fashion.

Round robin DNS is usually used for balancing the load of geographically distributed Web servers. For example, a company has one domain name and three identical home pages residing on three servers with three different IP addresses. When one user accesses the home page it will be sent to the first IP address. The second user who accesses the home page will be sent to the next IP address, and the third user will be sent to the third IP address. In each case, once the IP address is given out, it goes to the end of the list. The fourth user, therefore, will be sent to the first IP address, and so forth.