Network Working Group
Request for Comments: 2317
BCP: 20
Category: Best Current Practice
H. Eidnes (SINTEF RUNIT)
G. de Groot (Berkeley Software Design, Inc.)
P. Vixie (Internet Software Consortium)
$BJ?ED(B $BBY9T(B (Asuka.Net) $BLu(B
1998$BG/(B3$B7n(B
$B$3$l$O!"(B
RFC 2317,
"Classless IN-ADDR.ARPA delegation"
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$BK]Lu $B$3$NK]Lu$O(B "$B8=>uM-;Q(B (AS IS)" $B$GDs6!$5$l!"(B
$BL@<(E*$G$"$k$+L[<(E*$G$"$k$+$rLd$o$:$$$+$J$kJ]>Z$b9T$o$l$J$$$b$N$H$7$^$9!#(B $B$3$NJ8=q$O%$%s%?!<%M%C%H%3%_%e%K%F%#(B
$B$N(B Internet Best Current Practices $B$r5,Dj$9$k$b$N$G$"$k!#(B
$B2~NI$N$?$a$N5DO@$HDs0F$r5a$a$k!#(B
$B$3$NJ8=q$NG[I[$K@)8B$O$J$$!#(B
($B$3$NF|K\8lLu$K4X$7$F$bF1MM$N07$$$H$9$k!#(B) Copyright © The Internet Society
(1998). All rights reserved. $B$3$NJ8=q$G$O(B256$B8DL$K~$N%"%I%l%9$r;HMQ$7$F$$$k$h$&$J(B
$B%"%I%l%96u4V$,%*%/%F%C%H$G6h@Z$i$l$J$$>l9g$K$*$1$k(B
IN-ADDR.ARPA $B$N8"8B0Q>yJ}K!$K$D$$$F2r@b$9$k!#(B
$B$3$N$h$&$K$7$FDs0F$5$l$?J}K!$K$h$C$FHs%*%/%F%C%H6h@Z$j$r;}$D%5%V%M%C%H$K(B
$BBP$9$kH?BP$O$J$/$J$k$@$m$&!#(B
$B$^$?!"(BIN-ADDR.ARPA $B%^%C%T%s%0$KE,9g$9$k8"8B0Q>y5!G=$r<:$&$3$HL5$/!"(B
$B$h$jCx$7$/(B24$B%S%C%H$N%W%l%U%#%/%9$N6u4V$h$j$b69$$(BIP$B%"%I%l%96u4V(B
$B$r3d$jEv$F$k$3$H$,2DG=$K$J$k$@$m$&!#(B
$BDs0F$5$l$?J}K!$O!"(B[1]
$B$G5,Dj$5$l$k85Mh$N(B DNS $B;2>H5!9=$H40A4$K8_49@-$,$"$k!#(B
$B$9$J$o$A!";HMQ$5$l$k%"%k%4%j%:%`$rJQ99$9$kI,MW@-!"(B
DNS $B$r;2>H$9$k%=%U%H%&%'%"$rJQ99$9$kI,MW@-$OA4$/L5$$!#(B $B$3$NJ8=q$G$O!"(B
$B$3$NJ}K!$r $B%/%i%9%l%9!&%k!<%F%#%s%05;=Q$NH/E8$K$h$j!"(B
$BHs%*%/%F%C%H6h@Z$j$N%"%I%l%96u4V$r3d$jEv$F$k$3$H$,2DG=$K$J$C$?!#(B
$B>.?t$N%[%9%H$7$+;}$?$J$$$h$&$JHs>o$K>.5,LO$JAH?%$N>l9g!"(B
24$B%S%C%H!&%W%l%U%#%/%9(B
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$B$r3d$jEv$F$?$H$-$K@8$8$kLdBj$H$7$F!"(B
$B$=$N$h$&$J3dEv$r $B0J2<$NDL$j!"(B3$B$D$N0[$J$C$?AH?%$K%"%I%l%96u4V$r3d$jEv$F$k$3$H$r9M$($k(B: $B8EMh$NJ}K!$G$O!"0J2<$N$h$&$KC10l%>!<%s$r;HMQ$9$k$3$H$K$J$k(B: $B$3$N%>!<%s$N4IM}$K$OLdBj$,B?$$!#(B
$B$3$N%>!<%s$KBP$9$k8"8B$O(B1$B2s0Q>y$5$l$F$$$k$N$_$G$"$k$?$a!"(B
$B$3$l$O(B "$B$3$N%>!<%s$OC10l$NAH?%$K$h$C$F4IM}$5$l$k(B" $B$H2r $BC10l$N%>!<%s$O$?$@(B1$BEY$N$_8"8B$,0Q>y$5$l$k!#(B
$B$3$N$?$a!">e5-$NLdBj$r2r7h$9$k$?$a$K$O99$KDI2C$7$F8"8B0Q>y$r9T$&I,MW$,$"$k!#(B
$BDI2C$7$F8"8B0Q>y$r$9$kE@$O!"(BIN-ADDR.ARPA
$B%D%j!<$N2 $B$3$NJ}K!$K$h$C$FJ,3d$5$l$k(B256$B8D$N%"%I%l%9$N$^$H$^$j$=$l$>$l$K$D$$$F!"(B
$B?F%>!<%s$KBP$7$F(B256$B8D$N(B $B$3$NLdBj$NBP=hJ}K!$K$D$$$FDs0F$5$l$?JL$NJ}K!$KBP$9$k$3$NJ}K!$OM%0L@-$K!"(B
$B4{$K3+H/$5$l$?%=%U%H%&%'%"$N=$@5$,A4$/ITMW$G$"$k$H$$$&E@$,5s$2$i$l$k!#(B
$BFC$K!"(B"$BHs%I%C%H(B" $B6-3&$N(B IPv4 $B%"%I%l%9$+$iL>A0$X$NJQ49$KBP$9$k8"8BJ,3d$r(B
$B=hM}$9$k$?$a$K!"(BDNS $B$K$*$1$k8!:w5!9=$rJQ99$9$kI,MW$OL5$$!#(B
$B$5$i$K!"$3$N5;K!$OB?$/$N>l=j$G2?G/$b;HMQ$5$lB3$1$F$*$j!"(B
$BL@Gr$JLdBj$r0z$-5/$3$7$F$$$J$$!#(B $BEvA3!";q8;%l%3!<%I(B $B$O!"0J2<$NDL$j4J7i$K>JN,$7$F5-=R$9$k$3$H$,$G$-$k!#(B DNS$B$N $B$3$NNc$G$O(B " $B$3$N5;K!$O(B256$B8D0J2<$N%"%I%l%96u4V$N8"8B0Q>y$K;HMQ$9$k$3$H$rA[Dj$7$F$$$k!#(B
$B$h$jBg$-$J%"%I%l%9%V%m%C%/$N8"8B0Q>y$K$D$$$F$O!"(B
$BBe$o$j$KEAE}E*$JJ}K!(B ($BJ#?t$N8"8B0Q>y(B) $B$,;HMQ$G$-$k!#(B $B8E$$HG$N%M!<%`%5!<%P%=%U%H%&%'%"$O(B
$B4{$K%m!<%+%k$^$?$O8"8B$N$"$k%G!<%?$H$7$F;}$C$F$$$J$$>l9g!"(B
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$B;HMQ$9$kJ}K!$KBP$9$kBeBX IN-ADDR.ARPA $BLZ$N30It$r;X$7<($9J}K!$NNc$H$7$F!"0J2<$K4J7i$K<($9(B: $B$3$NJ}K!$G!"(B
$B@50z$-(B ($BL>A0"*%"%I%l%9(B) $B$H5U0z$-(B ($B%"%I%l%9"*L>A0(B)
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$B$3$N>u67$NFCDj$NI,MW>r7o$KE,9g$9$k2DG=@-$,9b$$$3$H$OL@Gr$G$"$k!#(B $BF10l$N%"%I%l%96u4V$KBP$9$k(B2$B2s0J>e$N(B $BIT9,$K$b!"NI$/CN$i$l$?(B DNS $B%M!<%`%5!<%P $B$3$NJ}K!$r;HMQ$9$k>l9g!"(B
"$B%j!<%U%5%$%H(B"
($BLuCp(B: http://leaf.aquaplus.co.jp/
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$BDI2C$7$F(B1$B$D$N%5%$%H$r(B DNS $B%M!<%`%5!<%S%9$N@5$7$/1?MQ$K4X$7$F(B
$B?.Mj$9$kI,MW$,$"$k!#(B
$B$=$7$F!"?.Mj@-$N$"$kL>A02r7h$K:]$7$F!"(B
$BF0:n$7$J$1$l$P$J$i$J$$M>J,[email protected]$rDI2C$9$k!#(B $B$=$l0J30$K4X$7$F!"(B
$BCx $BDs0F$5$l$?J}K!$O!"(BIN-ADDR.ARPA
$B%I%a%$%s$N8"8B0Q>y$K$*$1$k=@Fp@-$rDs6!$9$k!#(B
$B$3$l$K$h$C$F!"%"%I%l%9$+$iL>A0$X$N%^%C%T%s%0$K0lCW$9$k$h$&$J(B
DNS $B$N8"8B0Q>y5!G=$r<:$&$3$H$J$/!"(B
$B%"%I%l%96u4V$r$h$j8zN(E*$K3d$jEv$F$k$3$H$,2DG=$K$J$k!#(B Glen A. Herrmannsfeldt $B$K$O!">/$7A0$K$3$N5;K!$r(B
news:comp.protocols.tcp-ip.domains
$B$G2r@b$7$FD:$-$^$7$?!#(B
Alan Barrett $B$H(B Sam Wilson $B$K$O$=$N%K%e!<%:%0%k!<%W$G(B
$B5.=E$J0U8+$rD:$-$^$7$?!#(B $B;dC#$OHcI>$H7z@_E*$J0U8+$rD:$$$?(B
Rob Austein, Randy Bush, Matt Crawford, Robert Elz,
Glen A. Herrmannsfeldt, Daniel Karrenberg, David Kessens,
Tony Li, Paul Mockapetris, Eric Wassenaar, Michael Patton, Hans Maurer,
$B$=$7$F!"(BPeter Koch $B$K46 Copyright (C) The Internet Society
(1998). All rights reserved. This document and translations of it may be copied and furnished to
others, and derivative works that comment on or otherwise explain it
or assist in its implementation may be prepared, copied, published
and distributed, in whole or in part, without restriction of any
kind, provided that the above copyright notice and this paragraph are
included on all such copies and derivative works. However, this
document itself may not be modified in any way, such as by removing
the copyright notice or references to the Internet Society or other
Internet organizations, except as needed for the purpose of
developing Internet standards in which case the procedures for
copyrights defined in the Internet Standards process must be
followed, or as required to translate it into languages other than
English. The limited permissions granted above are perpetual and will not be
revoked by the Internet Society or its successors or assigns. This document and the information contained herein is provided on an
"AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.$B$3$NJ8=q$N0LCVIU$1(B
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2. $B=x@b(B
3. $BGX7J(B
$ORIGIN 2.0.192.in-addr.arpa.
;
1 PTR host1.A.domain.
2 PTR host2.A.domain.
3 PTR host3.A.domain.
;
129 PTR host1.B.domain.
130 PTR host2.B.domain.
131 PTR host3.B.domain.
;
193 PTR host1.C.domain.
194 PTR host2.C.domain.
195 PTR host3.C.domain.
4. $B%/%i%9%l%94D6-$K$*$1$k(B
IN-ADDR.ARPA $B$N8"8B0Q>y(B
$ORIGIN 2.0.192.in-addr.arpa.
@ IN SOA my-ns.my.domain. hostmaster.my.domain. (...)
;...
; <<0-127>> /25
0/25 NS ns.A.domain.
0/25 NS some.other.name.server.
;
1 CNAME 1.0/25.2.0.192.in-addr.arpa.
2 CNAME 2.0/25.2.0.192.in-addr.arpa.
3 CNAME 3.0/25.2.0.192.in-addr.arpa.
;
; <<128-191>> /26
128/26 NS ns.B.domain.
128/26 NS some.other.name.server.too.
;
129 CNAME 129.128/26.2.0.192.in-addr.arpa.
130 CNAME 130.128/26.2.0.192.in-addr.arpa.
131 CNAME 131.128/26.2.0.192.in-addr.arpa.
;
; <<192-255>> /26
192/26 NS ns.C.domain.
192/26 NS some.other.third.name.server.
;
193 CNAME 193.192/26.2.0.192.in-addr.arpa.
194 CNAME 194.192/26.2.0.192.in-addr.arpa.
195 CNAME 195.192/26.2.0.192.in-addr.arpa.
$ORIGIN 0/25.2.0.192.in-addr.arpa.
@ IN SOA ns.A.domain. hostmaster.A.domain. (...)
@ NS ns.A.domain.
@ NS some.other.name.server.
;
1 PTR host1.A.domain.
2 PTR host2.A.domain.
3 PTR host3.A.domain.
$ORIGIN 128/26.2.0.192.in-addr.arpa.
@ IN SOA ns.B.domain. hostmaster.B.domain. (...)
@ NS ns.B.domain.
@ NS some.other.name.server.too.
;
129 PTR host1.B.domain.
130 PTR host2.B.domain.
131 PTR host3.B.domain.
$ORIGIN 192/26.2.0.192.in-addr.arpa.
@ IN SOA ns.C.domain. hostmaster.C.domain. (...)
@ NS ns.C.domain.
@ NS some.other.third.name.server.
;
193 PTR host1.C.domain.
194 PTR host2.C.domain.
195 PTR host3.C.domain.
CNAME $B%l%3!<%I$rF3F~$9$kI,MW$,$"$k!#(B
$B$3$NJ}K!$OH~$7$/$J$$$H$$$&9M$(J}$b$"$k(B;
$B;dC#$O$=$NE@$K$D$$$F$O5DO@$r9T$o$J$$!#(B
$B$7$+$7$J$,$i!"%"%I%l%96u4V$NJ,3dJ}K!$,J,$+$l$P!"(B
$B?F%>!<%s$NA4$F$KBP$7$F0lEY$K(B CNAME
$B;q8;%l%3!<%I$r<+F0E*$K@8@.$9$k$N$OHs>o$K4JC1$J$3$H$G$"$k!#(B
$ORIGIN 2.0.192.in-addr.arpa.
129 CNAME 129.128/26.2.0.192.in-addr.arpa.
$ORIGIN 2.0.192.in-addr.arpa.
129 CNAME 129.128/26
/" $B$J$I$G$"$k!#(B
$B8+1I$($O0-$$$H$O$$$(!"(B
[3] $B$GL@3N$K=R$Y$i$l$F$$$k$h$&$K$=$l$i$N;HMQ$O@5Ev$G$"$k!#(B
$B$=$l$i$O%[%9%HL>$G$O$J$$$?$a!"(B
[2] $B$N@)8B$OE,MQ$5$l$J$$!#(B
$B6aBeE*$J%/%i%$%"%s%H$H%5!<%P$OJP8+$K$H$i$o$l$9!"(B
$B@5Ev$JN.57$K=>$&A*Br$r9T$&$@$m$&!#(B/" $B$r;HMQ$7$F$$$k!#(B
$B$J$<$J$i$P!"$h$jL\N)$D$h$&$K;W$(!"(B
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5.1 $B%;%+%s%@%j%M!<%`%5!<%S%9$N?d>)@_Dj(B
CNAME $B%l%3!<%I$G;X$7<($5$l$F$$$kL>A0$r8!:w$7$FJV$9$3$H$r$7$J$$!#(B
CNAME $B%l%3!<%I$N$_$,%l%9%]%s%9$H$7$F5"$5$l$k$?$a!"(B
$B%j%>%k%P(B (resolver) $B$KBP$7$F$$$/$D$+$N:.Mp$r0z$-5/$3$92DG=@-$,$"$k!#(B
$B$3$NLdBj$rHr$1$k$?$a!"(B
$B%>!<%s$N8"8B$r0Q>y$9$kB&(B ($BA4$F$N(B CNAME $B%l%3!<%I$r4^$`(B)
$B$N%5!<%P$OA4$F8"8B0Q>y$r5.2 $BL>A0JQ49$NBeBX
$ORIGIN 2.0.192.in-addr.arpa.
@ IN SOA my-ns.my.domain. hostmaster.my.domain. (...)
; ...
1 CNAME 1.A.domain.
2 CNAME 2.A.domain.
; ...
129 CNAME 129.B.domain.
130 CNAME 130.B.domain.
;
$ORIGIN A.domain.
@ IN SOA my-ns.A.domain. hostmaster.A.domain. (...)
; ...
;
host1 A 192.0.2.1
1 PTR host1
;
host2 A 192.0.2.2
2 PTR host2
;
CNAME $B%l%3!<%I$O(B
$B$=$l$KBP$9$k@5$7$$J}8~$r;X$7<($9I,MW$,$"$k!#(B
$ORIGIN 2.0.192.in-addr.arpa.
@ SOA my-ns.my.domain. hostmaster.my.domain. (...)
; ...
1 CNAME 1.2.0.192.in-addr.A.domain.
2 CNAME 2.2.0.192.in-addr.A.domain.
$ORIGIN A.domain.
@ SOA my-ns.A.domain. hostmaster.A.domain. (...)
; ...
;
host1 A 192.0.2.1
1.2.0.192.in-addr PTR host1
host2 A 192.0.2.2
2.2.0.192.in-addr PTR host2
5.3 $B$=$NB>!"@_Dj>e$NLdBj(B
CNAME
$B;2>H$rDs6!$9$k$3$H$O$G$-$J$$$3$H$KCm0U$7$J$1$l$P$J$i$J$$!#(B
$B$9$J$o$A!"$"$kAH?%$KBP$7$F(B /25 $B%W%l%U%#%/%9$r3d$jEv$F$F(B
$B$3$NJ}K!$G(B IN-ADDR.ARPA $B$r1?MQ$7!"(B
$BF1MM$N6. $B%;%-%e%j%F%#$K4X$9$k9M;!(B
7. $B7kO@(B
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10. $BCx
SINTEF RUNIT
N-7034 Trondheim
Norway
Phone: +47 73 59 44 68
Fax: +47 73 59 17 00
EMail: [email protected]
Berkeley Software Design, Inc. (BSDI)
Hendrik Staetslaan 69
5622 HM Eindhoven
The Netherlands
Phone: +31 40 2960509
Fax: +31 40 2960309
EMail: [email protected]
Internet Software Consortium
Star Route Box 159A
Woodside, CA 94062
USA
Phone: +1 415 747 0204
EMail: [email protected]11. $BCx:n8"I=<(A4J8(B
Original: © 1998 The Internet Society
Translation: © 2000
HIRATA Yasuyuki
<[email protected]>,
all rights reserved.