1. Sicunet DDNS : vmddns.com
vmddns.com of Sicunet is which is used for the conversion of dynamic public IP address from domain names to the
numeric format. The dynamic domain name address was supplied by DHCP server of your ADSL service company.
2. The technology of vmddns
On the DNS server, the domain name has to point a static IP address. Most of residential users don't have a static IP,
the IP is changed periodically. Hence, it's impossible to use the DNS server for dynamic IP addresses.
Once the IP number changes, the DNS data ceases to be valid.
The solution is offered by VMDDNS service. Much like DNS server, it
offers a database containing relations between domain and IP addresses,
however this database can be updated on request by the domain operator.
Because of this specific function of Sicunet, the server is available in the
domain address in spite of its actual IP address.
In such a case, the access to the server is limited to its domain name
translated by VMDDNS server, unless we know its actual IP address
(but of course we don't know how long it's going to be valid).
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