On 23/11/2010 08:07, Tech W. wrote: > --- On Tue, 23/11/10, Matus UHLAR - fantomas <uh...@fantomas.sk> wrote: >> From: Matus UHLAR - fantomas <uh...@fantomas.sk>
>>> can I set @ to a cname type? like: >>> >>> @ IN CNAME www.example.com. >> >> Certainly not. for a domain you have you need SOA and NS >> records, and CNAME >> is incompatible with both of them. >> > > But why @ can have an A RR? > > @ IN A 12.34.56.78 > > This seems OK for us. CNAME records are special. You can't have any other records for a label where you have a CNAME record (well, with the exception of RRSIG records if you're using DNSSEC). This is covered in great detail in any introductory text on DNS. The principle reason to want to have a CNAME record at the apex of a zone is to make http://example.com/ be a synonym for http://www.example.com/. The way to deal with that is to turn it round and make www.example.com be the CNAME record, and have the A record at example.com. Or just have A or AAAA records at both example.com and www.example.com Cheers, Matthew -- Dr Matthew J Seaman MA, D.Phil. 7 Priory Courtyard Flat 3 PGP: http://www.infracaninophile.co.uk/pgpkey Ramsgate JID: matt...@infracaninophile.co.uk Kent, CT11 9PW
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