dynamic DNS and static IPs

[tmetro-blu-5a1Jt6qxUNc at public.gmane.org (Tom Metro)]

Matthew Gillen wrote:
> At one point, DynDNS was only free for DHCP addresses.

Dynamic DNS works by having a client machine contact the dynamic DNS 
provider and either telling it the current IP of a domain, or letting 
the provider figure out the IP from the socket connection. In either 
case, how the IP happened to get assigned to the client computer should 
be invisible to the dynamic DNS provider.

I'm not sure how a dynamic DNS provider could tell the difference. At 
best they'd lookup up the PTR record on the IP and apply some heuristics 
to the returned domain name to judge whether it was from a dynamic pool.

In a lot of modern setups, static IPs are still supplied by an ISP via DHCP.

  -Tom

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Tom Metro
Venture Logic, Newton, MA, USA
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