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APNIC Document identity
Title: APNIC IN-ADDR.ARPA Delegation Form
Short title: in-addr-request
Document ref: APNIC-039
Version: 001
Date of original publication: 1 June 1996
Date of this version: 1 June 1996
Review scheduled: n/a
Obsoletes: APNIC-029
Status: Obsolete
Comments: Obsoleted by APNIC-049
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APNIC IN-ADDR.ARPA Delegation Form
Issued: June 1, 1996
Expires: December 31, 1996*
*) This form is valid until superseded by another form. After the
date specified, please check the APNIC document store located at
ftp://ftp.apnic.net/apnic/docs for a later version of this form.
This form is used to provide information to APNIC that will enable the
sub-delegation of an in-addr.arpa domain. In-addr.arpa domains allow
for the mapping of IP addresses into domain names. You must set up
your name server to accept the delegation prior to the submission of
this form.
Please see comments at the bottom of this form regarding how to
complete this application. Note that this form is parsed by machine
and modification of lines starting with #[ or the field names will
likely result in strange errors being returned to you and your request
not being processed.
After completing this form, please submit it via email to:
domreg@rs.apnic.net
or in type written English via fax (discouraged) to:
+81-3-5467-7015
or in type written English via postal mail (as a last resort) to:
Asia Pacific Network Information Center
c/o The United Nations University
53-70, Jingumae 5-Chome,
Shibuya-ku, Tokyo 150, Japan
If you have any questions regarding this form, you may contact us via
email at hostmaster@apnic.net (preferred), fax at the above number,
postal mail at the above address or via telephone at +81-3-5467-7014.
Note that we do not accept IN-ADDR.ARPA delegation requests via
telephone.
Please allow up to one week for processing electronic mail requests
and up to one month for other forms of submission.
NOTE: IT IS NOT NECESSARY TO INCLUDE THIS HEADER NOR THE INSTRUCTIONS
AT THE BOTTOM OF THIS FORM WITH YOUR APPLICATION.
- - - - - - - - - - - - - CUT HERE - - - - - - - - - - - - - - -
#[IN-ADDR TEMPLATE V3.0]#
inetnum:
netname:
rev-srv:
rev-srv:
rev-srv:
rev-srv:
rev-srv:
#[TEMPLATES-END]#
- - - - - - - - - - - - - CUT HERE - - - - - - - - - - - - - - -
1.0 Instructions for Obtaining IN-ADDR.ARPA Delegation
------------------------------------------------------
Please submit this form after providing appropriate values for all
mandatory fields. After completing the form, submit it to
domreg@apnic.net where it will be processed to determine if the
delegation can procede.
For the delegation to procede, all listed DNS servers visible to the
Internet and *MUST BE CONFIGURED*. In addition, the the network for
which you are attempting to gain delegation *MUST BE REGISTERED* in
the APNIC Registration database. Failure to observe these
requirements will result in your application being rejected.
As always, if you have any questions or comments regarding this form,
please contact hostmaster@apnic.net at your convenience.
2.0 Details for Filling in the IN-ADDR Template
-----------------------------------------------
INETNUM:
Please provide the IP network(s) you wish to have in-addr.arpa
domain(s) delegated for. If you wish to have multiple networks
registered using the same servers, please specify a range of addresses
as documented in APNIC-034.
Example:
inetnum: 202.12.28.0 - 202.12.29.0
NETNAME:
Please provide the name associated with this network as assigned by
APNIC, do NOT put your NIC handle, the network's domain name, etc.
This field is used to cross check the network provided in the INETNUM
field to help avoid accidental inappropriate delegation. The APNIC
assigned name for network (which may be different than that requested
when the network was assigned) can be determined by querying the APNIC
whois server with the network number (e.g., whois -h whois.apnic.net
<inetnum> and looking for the 'netname' field).
Example:
netname: APNIC-AP
REV-SRV:
Please provide the FULLY QUALIFIED DOMAIN NAMES (FQDN) of at least two
(and at most five) DNS servers that will provide the in-addr.arpa
service. ** DO NOT PUT THE IP ADDRESSES OF THE SERVERS, THE IN-ADDR
DOMAIN, ETC. ** Use fully qualified domain names only, e.g.,
ns.foo.com. You must provide at least TWO (2) DNS servers. If you do
not want all five, leave the REV-SRV fields you do not want to fill in
blank.
3.0 Supporting Notes
--------------------
1. What is an IN-ADDR.ARPA domain
The Internet uses a special domain to support address to name mapping,
referred to as inverse-addressing (IN-ADDR) or reverse nameserving.
Inverse addressing is necessary when you have an IP address and want
to obtain the name assocaiated with that address. Many servers in use
on the Internet today make use of inverse addressing to obtain the
domain name of hosts connecting to those servers. As these
applications use this information for log files, in many cases they
will refuse service unless the inverse nameserver provides an
appropriate name.
IN-ADDR domains are represented using the network number in reverse.
For example, the IN-ADDR domain for network 123.45.67.0 is represented
in the DNS and can be looked up as 67.45.123.IN-ADDR.ARPA (note:
please do not list your network number in reverse on your template).
2. Use of Classless Networks
The DNS, in particular, the in-addr.arpa tree is one of the last
bastions of classfull addressing as delegations are performed on byte
boundaries. For example, the delegations will occur for
202.in-addr.arpa for networks in the class A equivalent of 202.0.0.0 -
202.255.255.255, 12.202.in-addr.arpa for the networks in the class B
equivalent of 202.12.0.0 - 202.12.255.255 and for the class C network,
202.12.28.0.
This obviously make the delegation of classless addresses that happen
to fall outside a classfull boundary somewhat awkward. In general,
one must delegate each classfull component of a classless network,
e.g. in the case of a /17, all class C networks that make up that /17
will need to be delegated.
A technique has recently been described in an Internet Draft which
allows for the delegation of classless addresses of any prefix length.
While not exactly aesthetically pleasing, the technique has been shown
to work and does allow organizations to sub-delegate parts of
classfull networks. Remembering that Internet Drafts are works in
progress, you may obtain the draft from the APNIC archives at the
following URL:
ftp://archive.apnic.net/ietf/internet-drafts/...
draft-degroot-classless-inaddr-01.txt
References
----------
For those who need help in configuring the DNS, the following
publications will provide useful advice:
DNS and Bind, Paul Albitz & Cricket Liu, O'Reilly & Associates,
ISBN 1-56592-010-4
TCP/IP Network Administration, Craig Hunt, O'Reilly & Associates,
ISBN 0-937175-82-X
APNIC documents (not commercially available publications) are
available from the APNIC document store in the directories mentioned
in the URLs. The APNIC document store can be accessed in a number of
ways:
1. via anonymous FTP from host archive.apnic.net
Using your ftp application (usually called simply 'ftp'), connect to
host archive.apnic.net using your email address as the password.
For RFCs, use the "change directory" command (typically 'cd') to
'/ietf/rfc'. For APNIC documents, 'cd' to '/apnic/docs'. You
may then use the "get" command (typically 'get') to retrieve the
specific file.
2. via electronic mail through the APNIC FTP Email gateway
You may send mail to 'ftpmail@postoffice.apnic.net' with the body
of the message being standard Unix 'ftp' commands. For more help,
send an email message to 'ftpmail@postoffice.apnic.net' with a
message body consisting of 'help'. Results will be mailed back to
you.
3. via WWW to http://rs.apnic.net/archive
Using your WWW browser, e.g. Mosaic, Netscape, etc. connect to the
URL mentioned above and click on the appropriate subdirectory. Note
the APNIC registration service web serve is currently under
construction.
4. via gopher to gopher.apnic.net
Using your gopher application (usually called 'gopher'), connect to
gopher.apnic.net. Move to the "Information about APNIC" branch
(choice number 3), then choose the docs branch (choice 2) then
choose the appropriate document. If you are looking for IETF
documents, choose the "Information About Internet" branch (choice
7), then the "IETF Information" branch (choice 1).
Organizations without connectivity wishing to obtain copies of
the referenced documents should contact the APNIC or their local
registry to arrange postal delivery of one or more of the above
documents. Note that some fee may be associated with the delivery of
hardcopy versions of documents.