-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 mick crane wrote: > On 2019-04-12 10:57, Dan Purgert wrote: >> mick crane wrote: >>> On 2019-04-11 17:16, mick crane wrote: >>>> On 2019-04-11 17:05, Greg Wooledge wrote: >>>>> On Thu, Apr 11, 2019 at 05:02:46PM +0100, mick crane wrote: >>>>>> I think that is what dynamic ip address services do, change the >>>>>> ipaddress >>>>>> but the service has to be on the ISP's router ? >>>>>> Do I understand correctly then when your isp/home address changes >>>>>> your box >>>>>> broadcasts its domain new address to the internet ? >>>>> >>>>> It doesn't have to be on the router. You can set up a hook in >>>>> Debian >>>>> to run an arbitrary command whenever your IP address is changed by >>>>> DHCP. >>>>> This hook receives the old and new IP addresses, and some other >>>>> things, >>>>> as environment variables. It's about 3 lines of code to set it up. >>>>> No >>>>> parsing of the output of any ip or ifconfig command is needed. >>>>> >>>>> https://mywiki.wooledge.org/IpAddress >>>> >>>> I'll have a read but there must be something I don't understand. >>>> Thought there was a hierarchy of domain names mapped to ipaddresses >>>> that all the different servers can query as to where something is. >>> >>> Ok I think I see, you can host your own domain if you have a fixed >>> ipaddress but if have ipaddress that changes need to register domain >>> name and have company host it and advertise they know where it is but >>> can change the nameservers for the domain from theirs to yours at >>> changed ipaddress. >>> You can't willy nilly broadcast any domain to the internet yourself. >> >> Well, once your domain is registered (for example, mine), you can >> either >> >> >> 1. give your registrar the IP address they should point the domain >> to. >> This is easiest with static IP address assignments from your ISP, >> but there's no reason you couldn't do it on a dynamic IP >> >> OR >> >> 2. Use a dynamic DNS provider (e.g. dyndns, no-ip, afraid, many >> others), and have them automatically update the DNS registration >> when your IP address changes. >> >> Note that for option 2, you tell your registrar to use those other >> nameservers, rather than their own. >> >> I use option 2 myself, registered via ... oh I think 1&1 ... but using >> no-ip to provide my dyndns (although the IP hasn't changed in well over >> a year - I still don't want to be caught unawares :) ) > > I thought those dynamic dns services offered a sub domain of their own > domains.
Yes, that's for the freebie service (where offered). I think it's $14.95 for the year from no-ip service for my domain. > Can you have any registered domain point to dynamic dns servers and them > redirect it ? If it's yours, and you're paying enough to the service. > I have wondered what they do to stop people broadcasting their own top > level domain. They can't; at least not publicly. There's a hierarchy to DNS servers, and, well, it'd take some doing to supplant the root servers. -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEBcqaUD8uEzVNxUrujhHd8xJ5ooEFAlywbf0ACgkQjhHd8xJ5 ooE7jggAnGr7QcTmwefCnp5JFkm3txcGErf3C0B5BYJOIaGHwHDHjWVcFDqdrfX+ 4FNDgIWt/cV+DPngWQHMCfmP6aVv72DMlpvWoHdhcNYrmTo7k6zoCz3JPaugNqSV UHCuRWxInPchZzD6fLlRg6OT8vtX09mYP1/7NUNm6rmYk2yw7RBX0rzRN9y7IaDl iSXZKby0SCUGvmh2rR30ZrF7izW4lqVBzTaHsijh6TLrKoqvFJtp47WMeYHDJG/p 54i/DglDmMkqbdTKPt4PGDBwhlH6D4S/kUNHO8t5kDUwMASqvZuPo5zOFvdpxIyJ Oy0uOSZyczmm5l3InmIyangMY/Rnww== =x5a9 -----END PGP SIGNATURE----- -- |_|O|_| |_|_|O| Github: https://github.com/dpurgert |O|O|O| PGP: 05CA 9A50 3F2E 1335 4DC5 4AEE 8E11 DDF3 1279 A281