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What is Dynamic DNS?

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Posted 25 April 2013 - 10:14 AM

What is Dynamic DNS?

"Dynamic DNS or DDNS is a method of updating, in real time, a Domain Name System (DNS) to point to a changing IP address on the Internet. This is used to provide a persistent domain name for a resource that may change location on the network."
Wikipedia, http://en.wikipedia.org/wiki/Dynamic_DNS
 
Premium Members can choose up to 20 names in their Forwarded Ports page, accessible from the left tabs of their "Client Area".
 
Just for comfort, a name is associated to a forwarded port.

When a Premium member connects to an Air VPN server, the .airdns.org DNS record is updated to the exit-IP address of that server.

This service can be useful when you need a domain name, which must be persistent across all Air VPN servers, for a service you need to run "behind Air VPN". For example: if you want to host a game server, you can communicate to the players the DNS name and freely switch Air VPN servers.

Notes:TTL (Time-To-Live) is one hour. If you change VPN server, one hour may be needed before other users can resolve correctly your domain name. A longer time might be necessary: some public DNS (for example Google DNS) sometimes ignore TTL in their caching system.DNS are created or updated when a connection to an Air server is performed. They are deleted only if you disable the system (i.e. you delete the name from the forwarded ports panel). The latest IP address is NOT removed during disconnection or connection retry.







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