You need to add a CNAME record for plus.mywebsite.com with the value (without quotes) mywebsite.com
Then, you setup the Apache Virtual Hosts for the extra subdomain
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I also see the term "subdomain" used here a lot to refer to fully-qualified hostnames. I think of a subdomain as something for which a separate nameserver is maintained like this:
Here "sub.example.com" is a subdomain of example.com with a nameserver for the subdomain at 10.10.10.11. Both "host.example.com" and "mysub.example.com" are fully-qualified host names. The subdomain will contain A records for hosts like host.mysub.example.com. A good example of this in practice is where you want to partition a domain between servers, which might be in example.com, and workstations, which might be in the local.example.com subdomain.Code:... sub IN NS mysub.example.com. host IN A 10.10.10.10 mysub IN A 10.10.10.11
A subdomain may also have associated MX records if you want mail for something.example.com to be handled by a different SMTP exchanger than example.com. For instance, I manage a bunch of listservers for a client on a server i maintain. The domain's records are all hosted at the client's web provider. So there is an MX in the main zone file that points traffic for lists.example.com over to my server while mail for example.com goes somewhere else.
I'm not trying to be pedantic here, but there is a substantial difference from a DNS perspective if the first part of name.example.com refers to a host or a subdomain.
Last edited by SeijiSensei; March 26th, 2013 at 09:00 AM.
That makes sense. Thanks.
Not to detail the thread too much (the OP might find it helpful...maybe...), but I currently have all my stuff hosted on a VPS and the way my domain registrar has the DNS set up was to have everything pointed to the ip address of the server via A records, so it looked like this:
All those entries belonged to charlesa.net (and apparently I can ping charlesa.net.charlesa.net and it resolves to the correct IP, but I dunno why they set it up this way. )Code:* ip-address mx ip-address mail ip-address serenity ip-address charlesa.net ip-address
There are no CNAME records and only 2 MX records, one referencing * and the other referencing @. No idea what those mean, so I guess I will have to do some research.
Last edited by CharlesA; March 26th, 2013 at 04:13 PM.
The "@" stands for the entire domain, so this says to send mail for firstname.lastname@example.org to smtp.example.com. I'd guess the "*" handles mail for *.example.com, but I can't say for sure. I don't use wildcards in DNS records.Code:@ IN MX smtp.example.com.
I usually set up the top of a zone file like this:
Since each line is empty before the "IN" field, it inherits the contents of the field above it, in this case "@". So all those NS and MX records implicitly apply to example.com.Code:@ IN SOA example.com support.example.com. ( stuff ) IN NS ns1.example.com. IN NS ns2.example.com. IN MX 0 smtp.example.com. IN MX 10 smtp2.example.com. etc.
Thanks for the explanation. I'm not too sure what sort of setup my domain registrar has for handling DNS, but they present you with a web interface to modify CNAMES, A records, TXT records and the like.
I ended up having to contact their support to get an domainkeys entry setup because the web form wouldn't take the entire string.