rfc1995.txt

RFC 的详细文档！


RFC 1995            Incremental Zone Transfer in DNS         August 1996


   One of the IP addresses of JAIN-BB.JAIN.AD.JP. is changed.

      JAIN.AD.JP.         IN SOA ns.jain.ad.jp. mohta.jain.ad.jp. (
                                        3 600 600 3600000 604800)
                          IN NS  NS.JAIN.AD.JP.
      NS.JAIN.AD.JP.      IN A   133.69.136.1
      JAIN-BB.JAIN.AD.JP. IN A   133.69.136.3
                          IN A   192.41.197.2

   The following IXFR query

                 +---------------------------------------------------+
      Header     | OPCODE=SQUERY                                     |
                 +---------------------------------------------------+
      Question   | QNAME=JAIN.AD.JP., QCLASS=IN, QTYPE=IXFR          |
                 +---------------------------------------------------+
      Answer     | <empty>                                           |
                 +---------------------------------------------------+
      Authority  | JAIN.AD.JP.         IN SOA serial=1               |
                 +---------------------------------------------------+
      Additional | <empty>                                           |
                 +---------------------------------------------------+

   could be replied to with the following full zone transfer message:

                 +---------------------------------------------------+
      Header     | OPCODE=SQUERY, RESPONSE                           |
                 +---------------------------------------------------+
      Question   | QNAME=JAIN.AD.JP., QCLASS=IN, QTYPE=IXFR          |
                 +---------------------------------------------------+
      Answer     | JAIN.AD.JP.         IN SOA serial=3               |
                 | JAIN.AD.JP.         IN NS  NS.JAIN.AD.JP.         |
                 | NS.JAIN.AD.JP.      IN A   133.69.136.1           |
                 | JAIN-BB.JAIN.AD.JP. IN A   133.69.136.3           |
                 | JAIN-BB.JAIN.AD.JP. IN A   192.41.197.2           |
                 | JAIN.AD.JP.         IN SOA serial=3               |
                 +---------------------------------------------------+
      Authority  | <empty>                                           |
                 +---------------------------------------------------+
      Additional | <empty>                                           |
                 +---------------------------------------------------+










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RFC 1995            Incremental Zone Transfer in DNS         August 1996


   or with the following incremental message:

                 +---------------------------------------------------+
      Header     | OPCODE=SQUERY, RESPONSE                           |
                 +---------------------------------------------------+
      Question   | QNAME=JAIN.AD.JP., QCLASS=IN, QTYPE=IXFR          |
                 +---------------------------------------------------+
      Answer     | JAIN.AD.JP.         IN SOA serial=3               |
                 | JAIN.AD.JP.         IN SOA serial=1               |
                 | NEZU.JAIN.AD.JP.    IN A   133.69.136.5           |
                 | JAIN.AD.JP.         IN SOA serial=2               |
                 | JAIN-BB.JAIN.AD.JP. IN A   133.69.136.4           |
                 | JAIN-BB.JAIN.AD.JP. IN A   192.41.197.2           |
                 | JAIN.AD.JP.         IN SOA serial=2               |
                 | JAIN-BB.JAIN.AD.JP. IN A   133.69.136.4           |
                 | JAIN.AD.JP.         IN SOA serial=3               |
                 | JAIN-BB.JAIN.AD.JP. IN A   133.69.136.3           |
                 | JAIN.AD.JP.         IN SOA serial=3               |
                 +---------------------------------------------------+
      Authority  | <empty>                                           |
                 +---------------------------------------------------+
      Additional | <empty>                                           |
                 +---------------------------------------------------+

   or with the following condensed incremental message:

                 +---------------------------------------------------+
      Header     | OPCODE=SQUERY, RESPONSE                           |
                 +---------------------------------------------------+
      Question   | QNAME=JAIN.AD.JP., QCLASS=IN, QTYPE=IXFR          |
                 +---------------------------------------------------+
      Answer     | JAIN.AD.JP.         IN SOA serial=3               |
                 | JAIN.AD.JP.         IN SOA serial=1               |
                 | NEZU.JAIN.AD.JP.    IN A   133.69.136.5           |
                 | JAIN.AD.JP.         IN SOA serial=3               |
                 | JAIN-BB.JAIN.AD.JP. IN A   133.69.136.3           |
                 | JAIN-BB.JAIN.AD.JP. IN A   192.41.197.2           |
                 | JAIN.AD.JP.         IN SOA serial=3               |
                 +---------------------------------------------------+
      Authority  | <empty>                                           |
                 +---------------------------------------------------+
      Additional | <empty>                                           |
                 +---------------------------------------------------+








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RFC 1995            Incremental Zone Transfer in DNS         August 1996


   or, if UDP packet overflow occurs, with the following message:

                 +---------------------------------------------------+
      Header     | OPCODE=SQUERY, RESPONSE                           |
                 +---------------------------------------------------+
      Question   | QNAME=JAIN.AD.JP., QCLASS=IN, QTYPE=IXFR          |
                 +---------------------------------------------------+
      Answer     | JAIN.AD.JP.         IN SOA serial=3               |
                 +---------------------------------------------------+
      Authority  | <empty>                                           |
                 +---------------------------------------------------+
      Additional | <empty>                                           |
                 +---------------------------------------------------+

8. Acknowledgements

   The original idea of IXFR was conceived by Anant Kumar, Steve Hotz
   and Jon Postel.

   For the refinement of the protocol and documentation, many people
   have contributed including, but not limited to, Anant Kumar, Robert
   Austein, Paul Vixie, Randy Bush, Mark Andrews, Robert Elz and the
   members of the IETF DNSIND working group.

9. References

   [NOTIFY] Vixie, P., "DNS NOTIFY: A Mechanism for Prompt
   Notification of Zone Changes", RFC 1996, August 1996.

   [STD13] Mockapetris, P., "Domain Name System", STD 13, RFC 1034 and
   RFC 1035), November 1987.

10. Security Considerations

   Though DNS is related to several security problems, no attempt is
   made to fix them in this document.

   This document is believed to introduce no additional security
   problems to the current DNS protocol.












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RFC 1995            Incremental Zone Transfer in DNS         August 1996


11. Author's Address

   Masataka Ohta
   Computer Center
   Tokyo Institute of Technology
   2-12-1, O-okayama, Meguro-ku, Tokyo 152, JAPAN

   Phone: [phone]
   Fax: [phone]
   EMail: [e-mail]









































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