Reverse DNS record for my webhost

[A]

I have a VPS and requested my webhost to fix reverse DNS for my domain &
IP.  They responded by telling me to provide them with the records I want.

I found the following response to someone's question on the *Net*:

Many ISPs will put in CNAME records with values that have a
subdomain you DO control.
so they have 4.3.2.1.in-addr.arpa. (one of "your" addresses) as
"IN CNAME 4-3-2-1.yourdomain.com".
Then you go into "your domain.com" and add
4-3-2-1 IN PTR foohost.example.com
So you can change your PTRs, and the world finds them via your
ISP's CNAMEs.

And I thought that seemed a good way to go.  But I don't want to play
guessing games with my webhost as to the right record(s) and want to
confirm my guesses (and the above statement) with you experts before
casting it in concrete (or worse, having to repeatedly redo it to get it
right).  In particular, he states:

so they have 4.3.2.1.in-addr.arpa. (one of "your" addresses) as "IN
CNAME 4-3-2-1.*yourdomain.com*".


I think he typoed, or I really don't understand what he's saying. Did he
really mean to type:

"IN CNAME 4-3-2-1.*in-addr.arpa*"?

And so, the record I would provide to my webhost is "IN CNAME
4-3-2-1.in-addr.arpa"???

Or maybe he meant
*
* IN CNAME *1-2-3-4*.yourdomain.com  ??


Just to be clear I have multiple subdomains/CNAMEs, but just one IP
address.  I plan to run multiple apache vhosts on my VSP and single IP.

Thanks in advance!

[Grant Taylor via bind-users]

Post by A
I have a VPS and requested my webhost to fix reverse DNS for my domain &
IP.  They responded by telling me to provide them with the records I want.
Many ISPs will put in CNAME records with values that have a
subdomain you DO control.
so they have 4.3.2.1.in-addr.arpa. (one of "your" addresses) as
"IN CNAME 4-3-2-1.yourdomain.com".
Then you go into "your domain.com" and add
4-3-2-1 IN PTR foohost.example.com
So you can change your PTRs, and the world finds them via your
ISP's CNAMEs.
And I thought that seemed a good way to go.  But I don't want to play
guessing games with my webhost as to the right record(s) and want to
confirm my guesses (and the above statement) with you experts before
casting it in concrete (or worse, having to repeatedly redo it to get it

That sounds like Classless IN-ADDR.ARPA delegation. Check out RFC 2317.

Link - Classless IN-ADDR.ARPA delegation
- https://tools.ietf.org/html/rfc2317

They would really set up the 4.3.2.1.in-addr.arpa. as a CNAME to
<something>.<yourdomainname>.

Then you set up a PTR record for <something>.<yourdomainname> that
resolves to the name that you want reverse DNS for 1.2.3.4 to resolve to.

Post by A
Just to be clear I have multiple subdomains/CNAMEs, but just one IP
address.  I plan to run multiple apache vhosts on my VSP and single IP.

That may be problematic. Either you're going to end up publishing
multiple records for <something>.<yourdomainname> -or- the IP address
will reverse resolve to one FQDN.

I prefer the second route, and make all the vanity domain names be
CNAMEs to the single name that the IP reverse resolves to.

Post by A
Thanks in advance!

:-)

[Matus UHLAR - fantomas]

Post by A
I have a VPS and requested my webhost to fix reverse DNS for my domain
& IP.  They responded by telling me to provide them with the records I
want.

if you want to fix something, then it must be broken.
However, they have asked you, what should the reverse be.
so you just to have to tell them, what reverse DNS you want.

for example, if your server is named "publicface.example.com", and the
publicface.example.com DNS record points to your IP, just tell your ISP that
you want it to be "publicface.example.com". they will apparently set it.
are you sure you need to search for answers on the net, instead of asking
your ISP?
--
Matus UHLAR - fantomas, ***@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
Nothing is fool-proof to a talented fool.
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