On Sun, Dec 28, 2008 at 10:38:22AM +0000, Sean Miller wrote: > On Sun, Dec 28, 2008 at 10:31 AM, Martin Meredith <[email protected]> wrote: > > Dyndns etc provide services that allow you to setup a domain name that will > > change it's DNS when contacted by you. > > > > Put simply, a dynamic DNS service needs to be told every time your IP > > address > > changes. When this happens, it updates the record for your domain name to > > point > > to the new address. Generally, these use a low TTL (time to live) so that > > DNS > > servers at, for example, your ISP, will query their DNS servers (with the > > up-to-date record for your IP address) on a regular basis, rather than > > caching > > it (which is why you generally find when you make DNS changes on a "control > > panel" style site, it says that you may have to wait up to 48 hours - this > > is > > for the TTL to expire, so the DNS server checks against the server holding > > the > > record, rather than their internal cache) > > I think we have two completely different things here. > > One is the concept of DNS propogation, but the other is what DynDNS > does which is forward traffic to a given IP.
DynDNS is a DNS solution, NOT an IP forwarding solution. It does not forward traffic to an IP, it merely sets up a domain name which resolves to the IP address that is given to it, with a low TTL, so that when it changes, the propogation goes through quickly.
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