Thank you so much people. you rock!. I have finally gone for two A records, but thanks to all of you I now understand the pros and cons.
I apologise if I mislead you with the 'redirect' word, I really meant to say that I wanted both de the domain and the www host to point to the same ip. Cheers! Fred. On Fri, Sep 30, 2011 at 3:50 PM, Joseph S D Yao <j...@tux.org> wrote: > On Wed, Sep 28, 2011 at 04:19:41PM +0200, feralert wrote: > ... >> The thing is that i want users redirected to 'www.domain.com' even >> when they just type the domain name 'domain.com'. >> In order to do so I am not sure if its best to have one A RR for each >> or have an A RR for the domain and a CNAME RR pointing to 'domain.com' >> for 'www.domain.com'. >> >> >> domain.com A 1.1.1.1 >> www.domain.com A 1.1.1.1 >> >> OR >> >> domain.com A 1.1.1.1 >> www.domain.com CNAME domain.com > ... > > > It's clear you need an entry for both. Which is a matter of future > maintenance. If you only want to change it in one place, and you'll > never need any other records for "www" different from those for the > domain itself, go ahead and use the CNAME. (Multiply this by 1000 times > in 1000 different domains, or maybe all within the one domain, and it > may matter. OTOH, if you are using one file for 1000 different domains, > you CAN't use the CNAME. I don't think.) > > The only downside, besides not being able to have other records for the > "www" name, is that the resolver now has to make TWO queries. If your > name server is a PDP-11/05 running Unix V6 and BIND 4.1.2, this might > make a difference. [And if so - may I see it? ;~)] However, most name > servers these days are made of sterner stuff. And if you're truly doing > a "redirect" instead of just serving the same Web site at both names, > it'll have to make two queries anyway. > > As someone tried to say but didn't [too many pronouns, not enough clear > antecedents], a "redirect" would be done by your Web server, not by DNS. > The Web server at "domain.com" would say, go away, nothing to see here, > it's all going down at "www.domain.com". And the Web server at > "www.domain.com" would have all the goodies. But if you're serving the > same Web content at both names, that's NOT a "redirect". Whichever you > do, as I started out saying, you need both DNS entries. Whatever they > may be. > > > -- > /*********************************************************************\ > ** > ** Joe Yao j...@tux.org - Joseph S. D. Yao > ** > \*********************************************************************/ > _______________________________________________ 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