[Top-posting de-swizzled]
On Mar 15 2009, Ben Bridges wrote:
From: bind-users-boun...@lists.isc.org on behalf of Alan Clegg
[...]
Charles Lee wrote:
I believe its format should be: 96-127.51.212.195.in-addr.arpa
The problem I seem to be having is what order the 96-127 should be in,
because in normal format the network is 195.212.51.96-127 (we basically
run address .96 to address .127)
Can anyone help out with the proper format of the zone and what a PTR
record would look like?
It matters not a bit nor a twiddle, as it is just a label that needs to
be "pointed to" by the actual in-addr label elsewhere.
96.fred.51.212.195.in-addr.arpa. IN PTR mymachine.foo.com.
would work fine as long as you had:
fred.51.212.195.in-addr.arpa. IN NS delegated.foo.com.
96.51.212.195.in-addr.arpa. IN CNAME 96.fred.51.212.195.in-addr.arpa.
on the nameserver that was actually delegated 51.212.195.in-addr.arpa.
(feel free to use $GENERATE to create the above CNAMEs)
I agree, it's arbitrary. If you are wanting to format the name
of your zone similarly to the RFC, I believe the format would be
96/27.51.212.195.in-addr.arpa (for the subnet 195.212.51.96/27).
Except, of course, that RFC 2317 also says
| The examples here use "/" because it was felt to be more visible and
| pedantic reviewers felt that the 'these are not hostnames' argument
| needed to be repeated. We advise you not to be so pedantic, and to
| not precisely copy the above examples, e.g. substitute a more
| conservative character, such as hyphen, for "/".
Half-recommending the use of / was an abomination IMO, not because
it is a non-hostname character in the RFC 1123 sense, but because
it makes it very awkward to use zone names as file name components.
The real point for the OP is: whatever the naming convention used,
you have to agree it with the delegating authority (unless you are
in the happy position of *being* the delegating authority as well).
All too likely, they will not offer you any choice in the matter.
--
Chris Thompson
Email: c...@cam.ac.uk
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