David J Taylor wrote: > Martin Burnicki wrote: >> David, >> >> David J Taylor wrote: >>> Richard B. Gilbert wrote: >>> [] >>>> I've been using Comcast for five or six years now without a problem! >>>> YMMV. >>> >>> There have been a few problems with my ISP, hence I moved to a 3rd >>> party. >> >> We did't ever have any problems using the DNS servers of our ISPs. > > At the time, mine was using servers in the USA (from the UK) and via > non-reciprocal paths. Even now, it seems to be using servers from > abroad, and has no local reference clock.... I don't think that anyone > "cared" for it. > >>> I used to have my own DNS server. You do /not/ have to get the rest >>> of the world from Comcast. DNS is /not/ like NTP, and you talk >>> directly to the root servers to start with, which then pass you down >>> gradually to the correct server for the domain (e.g. for >>> microsoft.com) and in future you query the relevant domain server >>> directly. All seems to work very smoothly and automatically. >> >> IMHO DNS is not like NTP in the sense that is just *starts* sending >> queries for domains which have not yet been resolved to the root DNS >> servers and then are redirected/go on down to the authoritative DNS >> for that domain, whereas NTP would stuck with the top level servers >> if they have been configured. > > Agreed. When I first answered I had missed that Richard probably knows > more about DNS than me! >
I used to be an "expert" but time has taken its toll; I have forgotten a lot and things have changed in the last ten years. Eleven years ago, my then employer's "upstream provider" asked us to stop using their DNS server. Fair enough; we had something like 2,000 student users! They sent and received a lot of mail; it was a heavy load! I set up a local DNS server. At first it was simply a "caching" server; ask once and keep the answer on hand. Then I built the database to make the server "authoritative" for the site, got our upstream provider to host a copy. . . . It was highly educational! _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
