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7.2.4 DynDNS
If you don’t have a static IP address, but a dynamic one which is changing at every dial into
the internet, you can use a DynDNS service for always being reachable with the same host-
name. This is only required if you offer a service which should be reachable from the internet
(for example web server, VPN connection) or if you want to administrate the firewall from the
external net.
If you use the DynDNS services the client transmits at every dial-in its current IP address to
the DynDNS service provider. The current IP address is stored by the provider. The provider
links your static hostname with your current IP address. In this way it is assured that your
host is always available by the host name. The appliance transfers the current IP address to
the DynDNS provider.
You can create six interfaces
These will be listed in the tab DynDNS.
fig. 56 list of the external DNS update service for dynamical IP addresses