PLANET VIP-1680 - Manual (Page 26)

Public Port Specifies which port should be redirected to the internal host.
Private IP Specifies the private IP address of the internal host offering the service.
Private Port Specifies the private port number of the service offered by the internal
host.
Apply Click here to add the port-mapping entry and enable the service.
Dynamic DNS
DDNS is a service that maps Internet domain names to IP addresses. DDNS serves a similar purpose
to DNS: DDNS allows anyone hosting a Web or FTP server to advertise a public name to prospective
users. Unlike DNS that only works with static IP addresses, DDNS works with dynamic IP addresses,
such as those assigned by an ISP or other DHCP server. DDNS is popular with home network, who
typically receive dynamic, frequently-changing IP addresses from their service provider. To use DDNS,
one simply signs up with a provider and installs network software on their host to monitor its IP address.
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