In article <mailman.301.1471466524.15653.bind-us...@lists.isc.org>, "Darcy Kevin (FCA)" <kevin.da...@fcagroup.com> wrote:
> Barry, > Cloudflare has been doing this for a while, so that their customers > won't be > "limited by the DNS specifications (RFCs)" <rolls eyes>. Having done that, > they were compelled to offer another service -- so-called "CNAME flattening" > -- to fix the brokenness that's caused by their base offering. > > See > https://support.cloudflare.com/hc/en-us/articles/200169056-CNAME-Flattening-RF > C-compliant-support-for-CNAME-at-the-root > > I think Akamai also offers something similar. But these don't work by sending an actual CNAME record. The server that implements flattening looks ip the IP of the target, and returns it as an A record for the domain. That's why Cloudflare's method is "RFC-compliant", but what MS is doing with sharepoint.com is not. > > - Kevin > > -----Original Message----- > From: bind-users [mailto:bind-users-boun...@lists.isc.org] On Behalf Of Barry > Margolin > Sent: Wednesday, August 17, 2016 4:34 PM > To: comp-protocols-dns-b...@isc.org > Subject: Re: Selective forwarding from an internal only name server > > In article <mailman.299.1471461214.15653.bind-us...@lists.isc.org>, > "Darcy Kevin (FCA)" <kevin.da...@fcagroup.com> wrote: > > > Well, sharepoint.com is a CNAME to sharepoint.microsoft.com, so you > > might need to make arrangements for that to be resolvable as well. > > That doesn't seem valid to begin with. The .COM zone has delegation NS > records for sharepoint.com. Having a CNAME record for the same name is wrong. > > -- > Barry Margolin > Arlington, MA > _______________________________________________ > Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe > from this list > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users -- Barry Margolin Arlington, MA _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
