Fig. d11
13-4. £Ä£Î£Ó¤ÎÆ°ºî¤òÄ´¤Ù¤ë
(1) DNS ¥¥ã¥Ã¥·¥å¥Ç¡Ý¥¿ '96¡Á
* ¥¥ã¥Ã¥·¥å¥Ç¡Ý¥¿¤È¤Ï
DNS ¤Î¥¥ã¥Ã¥·¥å¥Ç¡Ý¥¿¤È¤¤¤¦¤Î¤Ï¡¢¥³¥ó¥Ô¥å¡Ý¥¿¤Î¥á¥â¥êÆâ¤ËÃߤ¨¤¿¥É¥á¥¤¥ó̾¤Î¾ðÊó
¤Ç¤¢¤ë¡£named ¤òµ¯Æ°¤µ¤»¤ë¤È¡¢½é¤áÀ©¸æ¥Õ¥¡¥¤¥ë¤Î named.ca µºÜ¤Î¥É¥á¥¤¥ó̾¾ðÊó¤ò¡¢
¥á¥¤¥ó¡¦¥á¥â¥ê¤Ëµ²±¤¹¤ë¡£named.ca ¥Õ¥¡¥¤¥ë¤Îµ½Ò¤ò¡¢ ¥¤¥ó¥¿¡Ý¥Í¥Ã¥È¤Î¥ë¡Ý¥ÈÍÑ¥
¥ã¥Ã¥·¥å¤Î¤ò»È¤¦¤È¡¢À¤³¦Ãæ¤É¤³¤Ø¤Ç¤â¥¢¥¯¥»¥¹¤¬¤Ç¤¤ë¤è¤¦¤Ë¤Ê¤ë¡£¤³¤Î¥Õ¥¡¥¤¥ë¤Ë¤Ï
DNS ´ÉÍý¤ÎÂç¿Æʬ¤Î£É£Ð¥¢¥É¥ì¥¹¤¬½ñ¤¤¤Æ¤¢¤ë¤«¤é¤Ç¤¢¤ë¡£¤½¤·¤Æ¾¤Î¥É¥á¥¤¥ó¤Î¥Û¥¹¥È
¤Ë¥¢¥¯¥»¥¹¤¹¤ë¤¿¤Ó¡¢¤½¤Î¥Í¡Ý¥à¥µ¡Ý¥Ð¤ä¥Û¥¹¥È¤Î£É£Ð¥¢¥É¥ì¥¹¤¬¥¥ã¥Ã¥·¥å¥Ç¡Ý¥¿¤ËÄÉ
²Ã¤µ¤ì¤Æ¹Ô¤¯¤³¤È¤Ë¤Ê¤ë¡£¤Ä¤Þ¤ê¥³¥ó¥Ô¥å¡Ý¥¿¤Î¥á¥â¥ê¤Ëµ²±¤µ¤ì¤Æ¤¤¤¯¡£¤â¤Á¤í¤ó¥á¥â
¥êÃæ¤Îµ²±¤Ê¤Î¤Ç¡¢¥³¥ó¥Ô¥å¡Ý¥¿¤ò¥·¥ã¥Ã¥È¥À¥¦¥ó¤·¤¿¤é¤½¤Îµ²±¤Ï¤Þ¤Ã¤µ¤é¤Ë¤Ê¤ë¡£
* ¥¥ã¥Ã¥·¥å¥Ç¡Ý¥¿¤ÎÎã
¥í¡Ý¥«¥ë¤Ç¤Î¤ß»È¤¦ DNS ¤ÎÀßÄê¤òÎã¤Ë¤¹¤ë¡£ °ì±þ SunOS 4.1.4-JLE ¤Î named ¥Ç¡Ý¥â¥ó
¤Ç¤Î·ë²Ì¤Ç¤¢¤ë¡£°Ê²¼¤ÎÎã¤Ç¤Ï¾¤Î DNS ¤ò¸«¤Ë¹Ô¤¯¤³¤È¤Ï¤Ç¤¤º¡¢ ¥¯¥í¡Ý¥º¤·¤Æ¤¤¤ë¤Î
¤Ç¾ðÊó¤ÏÁý¤¨¤ë¤³¤È¤Ï¤Ê¤¤¡£
/etc/named.boot
-------------------------------------------------------------------
|;domain nix.co.jj << ¤³¤ì¤Ï¥¥ã¥Ã¥·¥å¥Ç¡Ý¥¿¤Ë¤Ï´Ø·¸¤Ê¤¤¡£
|
|primary nix.co.jj /etc/named.hosts
|cache . /etc/named.ca
|primary 0.0.127.in-addr.arpa /etc/named.local
|;primary 201.9.192.in-addr.arpa /etc/named.rev << ¤È¤ê¤¢¤¨¤º¤Ê¤·¡£
/etc/named.ca
-------------------------------------------------------------------
|. 99999 IN NS hostA.nix.co.jj.
|hostA.nix.co.jj. 99999 IN A 192.9.201.1
/etc/named.hosts
-------------------------------------------------------------------
|;name ttl class type reccod specific infomation
|@ IN SOA hostA.nix.co.jj. katou.nix.co.jj. (
| 19970307
| 3600 300 3600000 360000 )
| IN NS hostA.nix.co.jj.
|localhost. IN A 127.0.0.1
|hostA IN A 192.9.201.1
/etc/named.local
-------------------------------------------------------------------
|@ IN SOA hostA.nix.co.jj. katou.nix.co.jj. (
| 19970307
| 3600 300 3600000 360000 )
| IN NS hostA.nix.co.jj.
|$ORIGIN 0.0.127.in-addr.arpa.
|1 IN PTR localhost.
# /usr/etc/in.named &
# kill -INT in.named-pid << ¤³¤ì¤Ç named_dump.db ¥Õ¥¡¥¤¥ë¤¬¤Ç¤¤ë¡£
¤¹¤Ç¤Ë¤¢¤ë¾ì¹ç¤Ï¡¢½ñ¤´¹¤¨¤é¤ì¤ë¡£
# cat /var/tmp/named_dump.db
; Dumped at Thu Mar 27 10:41:59 1997
; --- Cache & Data ---
$ORIGIN .
. 286 IN NS hostA.nix.co.jj.
localhost IN A 127.0.0.1
$ORIGIN co.jj.
nix IN SOA hostA.nix.co.jj. katou.nix.co.jj. (
19970307 3600 300 3600000 360000 )
IN NS hostA.nix.co.jj.
$ORIGIN nix.co.jj.
hostA IN A 192.9.201.1
$ORIGIN 0.127.in-addr.arpa.
0 IN SOA hostA.nix.co.jj. katou.nix.co.jj. (
19970307 3600 300 3600000 360000 )
IN NS hostA.nix.co.jj.
$ORIGIN 0.0.127.in-addr.arpa.
1 IN PTR localhost.
; --- Hints --- << ¤³¤³¤«¤é²¼¤¬ named.ca ¤ÇÆɤß
$ORIGIN . ¹þ¤ó¤À¥ë¡Ý¥È¤Î¾ðÊó¡£
. 99957 IN NS hostA.nix.co.jj.
$ORIGIN nix.co.jj.
hostA 99957 IN A 192.9.201.1 ; 26
¢¬
¡Ã
¤³¤ÎÃͤϤɤó¤É¤ó¸º¤Ã¤Æ¹Ô¤¯¡£named ¥Ç¡Ý¥â¥ó¤òµ¯Æ°¤·¤Æ¡¢# kill -INT ¤ä¤ë¤Þ¤Ç£³£³ÉÃ
( 99999-99957=33 )·Ð¤Ã¤¿¤È¤¤¤¦¤³¤È¤Ç¤¢¤ë¡£¤³¤ì 0 ¤Ë¤Ê¤Ã¤¿¤é¤É¤¦¤Ê¤ë¤Î¤«¤Ê¡£ ºÇ¿·
¤Î BIND ¤Ç¤Ï root.cache ¤Î¥Ç¡Ý¥¿¤ÏÃͤ¬¸º¤é¤Ê¤¤¤è¤¦¤Ë¤Ê¤Ã¤Æ¤¤¤ë¤é¤·¤¤¡£named.ca¤ò
¥¤¥ó¥¿¡Ý¥Í¥Ã¥ÈÍѤΤâ¤Î¤Ë¤¹¤ì¤Ð¡¢Â¾¥µ¥¤¥È¤Ë¥¢¥¯¥»¥¹¤¹¤ëËè¤Ë¥¥ã¥Ã¥·¥å¥Ç¡Ý¥¿¤Ë·ë²Ì
¤¬Ãߤ¨¤é¤ì¤Æ¤¤¤¯¡£¤³¤Î¤è¤¦¤Ë͸ú´ü´Ö¤òȼ¤Ã¤¿¥Ç¡Ý¥¿¤¬Ãߤ¨¤é¤ì¤ë¡£¤³¤ì¤Ç¡¢¤è¤½¤Î¥Ç
¡Ý¥¿¤Ê¤Î¤«¡¢¼«Ê¬¤È¤³¤Î¥Ç¡Ý¥¿¤Ê¤Î¤«¶èÊ̤Ǥ¤ë¡£
* named_dump.db ¤«¤éʬ¤«¤ë¤³¤È
¤³¤Î¥¥ã¥Ã¥·¥å¥Ç¡Ý¥¿¤Î¥À¥ó¥×¾ðÊó¤Î°ÕÌ£¤¹¤ë¤È¤³¤í¤ÏÂ礤¤¡£DNS ¤Î»ÅÁȤߡ¢¤½¤ì¤ËÀ©
¸æ¥Õ¥¡¥¤¥ë¤Î½ñ¤Êý¤òÍý²ò¤¹¤ë¾å¤Ç½ÅÍפǤ¢¤ë¡£ named.hosts ¤À named.rev ¤À¤Èµ½Ò¤·
¤Æ¤â¡¢¤Ä¤Þ¤ë¤È¤³¤í¤³¤Î¤è¤¦¤Ê¥á¥â¥ê¤ËÃߤ¨¤é¤ì¤ë¥Ç¡Ý¥¿¤¬¡¢DNS ¤Î¾ðÊó¤È¤·¤Æ͸ú¤Ë¤Ê
¤ë¡£named.boot ¤Î primary ¤â secondary ¤â¡¢ ¤³¤Î¤è¤¦¤Ë¥á¥â¥êŸ³«¤µ¤ì¤¿¤é°ì½ï¤Ç¤¢
¤ê¡¢¥Ç¡Ý¥¿¤È¤·¤Æ¤Ï¶èÊ̤Ϥʤ¤¡£ ¤È¤â¤«¤¯¥á¥â¥êÃæ¤Î $ORIGIN nix.co.jj. ¤Ë³¤¯ A ¥ì
¥³¡Ý¥É¤¬¡¢¥Û¥¹¥È̾¤ËÂбþ¤¹¤ë£É£Ð¥¢¥É¥ì¥¹¤Ç¤¢¤ê¡¢nix.co.jj ¥É¥á¥¤¥ó¤Î¥ª¡Ý¥½¥é¥¤¥º
¤µ¤ì¤¿¥Ç¡Ý¥¿¤Ç¤¢¤ë¡£ µÕ°ú¤¥Ç¡Ý¥¿¤Ë¤Ä¤¤¤Æ¤â $ORIGIN 1.168.192.in-addr.arpa. ¤È¤¢
¤ì¤Ð¡¢192.168.1.0 ¥Í¥Ã¥È¥ï¡Ý¥¯¤Î¥Û¥¹¥È£É£Ð¥¢¥É¥ì¥¹¤ò´ÉÍý¤·¤Æ¤Þ¤¹¤È¤¤¤¦¤³¤È¤Ç¤¢¤ë¡£
¤½¤·¤Æ¾å°Ì¥É¥á¥¤¥ó¡¢¤Ä¤Þ¤ê¥¤¥ó¥¿¡Ý¥Í¥Ã¥È¾å¤Ç¤Ï¡¢nix.co.jj ¤Ë¤Ä¤¤¤Æ¤Ï¤³¤³¤Ëʹ¤¤¤Æ
¤¯¤ì¡¢192.168.1.0 ¤Ë¤Ä¤¤¤Æ¤Ï¤³¤³¤Ëʹ¤¤¤Æ¤¯¤ì¤È¡¢ JPNIC ¤Î DNS ¤Ë½ñ¤«¤ì¤Æ¤¤¤ì¤Ð¤¤
¤¤¤Î¤Ç¤¢¤ë¡£¤³¤ì¤é nix.co.jj ¤È 192.168.1.0 ¤Î¥Ú¥¢¤Î¥¾¡Ý¥ó¾ðÊó¤Ï¡¢Ä̾ï¤ÏƱ¤¸ DNS
¤Ç´ÉÍý¤µ¤ì¤ë¡£¤·¤«¤· DNS ¤Î»ÅÁȤßŪ¤Ë¤Ï¡¢ ¤É¤³¤¬´ÉÍý¤·¤Æ¤¤¤ë¤«Ê¬¤«¤Ã¤Æ¤µ¤¨¤¤¤ì¤Ð¡¢
¤è¤½¤Î¥µ¥¤¥È¤Ç 192.168.1.0 ¤Î¥¾¡Ý¥ó¾ðÊ󤬴ÉÍý¤µ¤ì¤Æ¤â¹½¤ï¤Ê¤¤¤È¤¤¤¦¤³¤È¤Ç¤¢¤ë¡£
* Apollo ¤Î named ¤Ç³Îǧ¤·¤¿¤³¤È `23/11
SOA ¥ì¥³¡Ý¥É¤Î Minimum TTL ¤Ë¤Ä¤¤¤Æµ¤ÉÕ¤¤¤¿¤³¤È¡£ ¤³¤ÎÃͤò£¶£°Éä䣱£°Éäˤ·¤Æ¥Æ
¥¹¥È¤ò¤ä¤Ã¤Æ¤¤¤¿¤È¤³¤í¡¢ Ì䤤¹ç¤ï¤»¤ò¤·¤¿ named ¥µ¡Ý¥Ð¤Ë¥¥ã¥Ã¥·¥å¤µ¤ì¤ë»þ´Ö¤¬¤½
¤¦¤Ê¤é¤Ê¤¤¡£¤É¤¦¤â£µÊ¬¤¬ºÇÄã¤Ç¡¢¤½¤ì°Ê²¼¤ÎÃͤÀ¤È£µÊ¬¤Ë¤·¤Æ¥¥ã¥Ã¥·¥å¤¹¤ë¤è¤¦¤Ç¤¢
¤ë¡£²¼¤Î¤è¤¦¤Ê¥ß¥Ë¡¦¥¤¥ó¥¿¡Ý¥Í¥Ã¥È¤Ç³Îǧ¤·¤Æ¤ß¤¿¡£DNS ¤Î¥¯¥é¥¤¥¢¥ó¥È¤Î¥Û¥¹¥È¤«¤é
Î㤨¤Ð $ ping D1.ddd.jj ¤È¤ä¤ì¤Ð¡¢¥Û¥¹¥È E0 ¤Î named ¥µ¡Ý¥Ð¤Ë D1.ddd.jj ¤Î£É£Ð¥¢
¥É¥ì¥¹¤òÌ䤤¹ç¤ï¤»¤ë¡£E0 ¤Î named ¤ÏÃΤé¤Ê¤¤¤Î¤Ç¡¢ ¥Û¥¹¥È D0 ¤Î named ¤ËÌ䤤¹ç¤ï
¤»¡¢²óÅú¤ò¤â¤é¤¤¥¯¥é¥¤¥¢¥ó¥È¤ËÊÖÅú¤·¡¢¼«Ê¬¤â¤½¤Î¾ðÊó¤òÃߤ¨¤ë¡£
ddd.jj D1.ddd.jj eee.jj D1.ddd.jj
-------- Ì䤤¹ç¤ï¤» -------- Ì䤤¹ç¤ï¤» --------
|¥Û¥¹¥È| <------------ |¥Û¥¹¥È| <------------ |¥¯¥é¥¤| /etc/resolv.conf
| D0 | | E0 | |¥¢¥ó¥È| ----------------
-------- named -------- named -------- |192.10.10.2
| .1 |.2 |.3
-------------------------------------------------------------- 192.10.10.0
D1.ddd.jj ¤Î¥¥ã¥Ã¥·¥å»þ´Ö¤Ï£µÊ¬¡£
D2.ddd.jj ¤Î¥¥ã¥Ã¥·¥å»þ´Ö¤Ï£±£°Ê¬¡£
¥Û¥¹¥È D0 ¤Î named.hosts
---------------------------------------------------------------
|@ IN SOA D0.aaa.jj. katou.D0.aaa.jj. ( 1 100 100 100 60 ) ;
| | ¢¬
|D1 IN A 192.10.10.8 ¢« D1.ddd.jj ¤Ï¥¥ã¥Ã¥·¥å»þ´Ö¤ò¥Ç
|D2 600 IN A 192.10.10.9 ¥Õ¥©¥ë¥È¤Ç¤³¤ÎÃÍ¡¢£¶£°Éäò¤È¤ë¡£
¢¬
D2.ddd.jj ¤Ï¥¥ã¥Ã¥·¥å»þ´Ö¤ò£¶£°£°ÉäȻØÄꤷ¤¿¡£
(2) nslookup ¥³¥Þ¥ó¥É
* ¾ÜºÙ¾ðÊó¤ò¤ß¤ë Î㡧INDY ¤Ç¥µ¥Ö¥É¥á¥¤¥ó¤Î DNS ¾ðÊó¤ò¤ß¤ë¡£
/etc/resolv.conf
-----------------------
|nameserver 192.9.200.6
% nslookup
Default Server: hostC.sub.nix.co.jj
Address: 192.9.200.6
> set all << set all ¤Ï¥ª¥×¥·¥ç¥ó¤Î¾õÂÖ¤òɽ¼¨¤¹¤ë¡£
Default Server: hostC.sub.nix.co.jj
Address: 192.9.200.6
Set options:
nodebug defname search recurse
nod2 novc noignoretc port=53
querytype=A class=IN timeout=5 retry=4
root=ns.internic.net.
domain=
srchlist=
> set type=any << set type=any ¤È¤ä¤Ã¤Æ¥É¥á¥¤¥ó̾¤òÆþ¤ì¤ë¤È¡¢
> sub.nix.co.jj ¤½¤Î¥É¥á¥¤¥ó¤Î SOA ¤È NS ¥ì¥³¡Ý¥É¾ðÊ󤬽Ð
Server: hostC.sub.nix.co.jj ¤ÆÍè¤ë¡£
Address: 192.9.200.6
sub.nix.co.jj
origin = hostC.sub.nix.co.jj
mail addr = katou.hostC.sub.nix.co.jj
serial = 10001
refresh = 3600 (1 hour)
retry = 300 (5 mins)
expire = 3600000 (41 days 16 hours)
minimum ttl = 360000 (4 days 4 hours)
sub.nix.co.jj nameserver = hostC.sub.nix.co.jj
sub.nix.co.jj preference = 10, mail exchanger = hostC.sub.nix.co.jj
hostC.sub.nix.co.jj internet address = 192.9.200.6
> ls -d sub.nix.co.jj << named.hosts ¤ÎÆâÍƤ½¤Î¤â¤Î¤¬É½¼¨¤µ¤ì¤ë¡£
[hostC.sub.nix.co.jj]
sub.nix.co.jj. SOA hostC.sub.nix.co.jj katou.hostC.sub.nix.co.jj.
(10001 3600 300 3600000 360000)
sub.nix.co.jj. NS hostC.sub.nix.co.jj
sub.nix.co.jj. MX 10 hostC.sub.nix.co.jj
hostC A 192.9.200.6
sub.nix.co.jj. SOA hostC.sub.nix.co.jj katou.hostC.sub.nix.co.jj.
(10001 3600 300 3600000 360000)
> ls -d 200.9.192.in-addr.arpa << named.rev ¤ÎÆâÍƤ½¤Î¤â¤Î¤¬É½¼¨¤µ¤ì¤ë¡£
> set type=a << A ¥ì¥³¡Ý¥É¤ò¤ß¤ë¡£FQDN ¤òÆþ¤ì¤ë¡£
> set type=ptr << µÕ°ú¤¥ì¥³¡Ý¥É¤ò¤ß¤ë¡££É£Ð¥¢¥É¥ì¥¹¤òÆþ¤ì¤ë¡£
> set type=ns << ¥Í¡Ý¥à¥µ¡Ý¥Ð¤ò¤ß¤ë¡£
> set type=soa << SOA ¥ì¥³¡Ý¥É¤ò¤ß¤ë¡£
> ? << ¥Ø¥ë¥×¡£
Commands: (identifiers are shown in uppercase, [] means optional)
NAME - print info about the host/domain NAME using default server
NAME1 NAME2 - as above, but use NAME2 as server
help or ? - print info on common commands; see nslookup(1) for details
set OPTION - set an option
all - print options, current server and host
[no]debug - print debugging information
[no]d2 - print exhaustive debugging information
[no]defname - append domain name to each query
[no]recurse - ask for recursive answer to query
[no]vc - always use a virtual circuit
domain=NAME - set default domain name to NAME
srchlist=N1[/N2/.../N6] - set domain to N1 and search list to N1,N2, etc.
root=NAME - set root server to NAME
retry=X - set number of retries to X
timeout=X - set initial time-out interval to X seconds
querytype=X - set query type, e.g., A,ANY,CNAME,HINFO,MX,NS,PTR,SOA,WKS
type=X - synonym for querytype
class=X - set query class to one of IN (Internet), CHAOS, HESIOD or ANY
server NAME - set default server to NAME, using current default server
lserver NAME - set default server to NAME, using initial server
finger [USER] - finger the optional NAME at the current default host
root - set current default server to the root
ls [opt] DOMAIN [> FILE] - list addresses in DOMAIN (optional: output to FILE)
-a - list canonical names and aliases
-h - list HINFO (CPU type and operating system)
-s - list well-known services
-d - list all records
-t TYPE - list records of the given type (e.g., A,CNAME,MX, etc.)
view FILE - sort an 'ls' output file and view it with more
exit - exit the program, ^D also exits
> exit << ½ª¤ï¤ê¡£quit ¤Ç¤â½ª¤ï¤ì¤½¤¦¤Êµ¤¤¬¤¹¤ë¤¬¥À¥á¡£
* DNS ¤Î¥¥ã¥Ã¥·¥å¾ðÊó¤Î³Îǧ
> set type=a
> hostB.nix.co.jj << ½é¤á¤Æ hostB.nix.co.jj ¤Î£É£Ð¥¢¥É¥ì¥¹¤òÌä
Server: hostC.sub.nix.co.jj ¤¤¹ç¤ï¤»¤ë¡£
Address: 192.9.200.6
Name: hostB.nix.co.jj
Address: 192.9.200.2
> hostB.nix.co.jj << £²²óÌÜ¡¢Ì䤤¹ç¤ï¤»¤¿¤È¤³¤í¡£ ¤³¤Î¥Í¡Ý¥à¥µ
Server: hostC.sub.nix.co.jj ¡Ý¥Ð¤Ï hostB.nix.co.jj ¤Î£É£Ð¥¢¥É¥ì¥¹¤ò³Ð
Address: 192.9.200.6 ¤¨¤Æ¤¤¤ë¡£
Non-authoritative answer: << ¥¥ã¥Ã¥·¥å¤µ¤ì¤Æ¤¤¤ë¤³¤È¤ò¼¨¤¹¡£
Name: hostB.nix.co.jj
Address: 192.9.200.2
* ¥Í¡Ý¥à¥µ¡Ý¥Ð¤ò¸«¤Ä¤±¤ë
> set q=ns
> nix.co.jj
Server: hostC.sub.nix.co.jj
Address: 192.9.200.6
Non-authoritative answer:
nix.co.jj nameserver = hostA.nix.co.jj
Authoritative answers can be found from:
nix.co.jj nameserver = hostA.nix.co.jj
hostA.nix.co.jj internet address = 192.9.200.1
* ¾¤Î¥Í¡Ý¥à¥µ¡Ý¥Ð¤Î¾ðÊó¤ò¤ß¤ë
> server hostA.nix.co.jj << £É£Ð¥¢¥É¥ì¥¹¤òÆþ¤ì¤Æ¤â¤¤¤¤¡£
Default Server: hostA.nix.co.jj
Address: 192.9.200.1
> ls nix.co.jj
[hostA.nix.co.jj]
nix.co.jj. server = hostA.nix.co.jj
hostA 192.9.200.1
hostB 192.9.200.2
localhost 127.0.0.1
sub server = hostC.sub.nix.co.jj
hostC.sub 192.9.200.6
hostA 192.9.200.1
* named ¤Î¥Ý¡Ý¥ÈÈÖ¹æ¤òÊѹ¹¤¹¤ë
named ¤Î TCP/UDP ¥Ý¡Ý¥ÈÈÖ¹æ¤òÊѤ¨¤Æ¤ß¤ë¡£²¿¤ÎÌò¤ËΩ¤Ä¤«Ê¬¤«¤é¤Ê¤¤¤¬¡¢ °ì±þ¤³¤ó¤Ê
¤³¤È¤â¤Ç¤¤ë¤è¤È¤¤¤¦¤³¤È¤Ç¡£named ¥Ç¡Ý¥â¥ó¤Î¥¯¥é¥¤¥¢¥ó¥È¤«¤é¤Î¥¢¥¯¥»¥¹¡¦¥Ý¡Ý¥ÈÈÖ
¹æ¤Î¥Ç¥Õ¥©¥ë¥È¤Ï 53 ÈÖ¡£named ¥Ç¡Ý¥â¥óƱ»Î¤â 53 ÈÖ¤ò»È¤¦¡£
% named -p 55 &
/etc/services
----------------------------------
| |
|domain 55/tcp nameserver << 55 ÈÖ¤ËÊѤ¨¤Æ¤ª¤¯¡£¸µ¤Ï 53 ÈÖ¡£
|domain 55/udp nameserver
| |
% nslookup << ³Îǧ¤·¤Æ¤ß¤ë
> set port=55
> sub.nix.co.jj
Server: hostC.sub.nix.co.jj
Address: 192.9.200.6 << ¸«¤Ä¤«¤é¤Ê¤¤¤È½Ð¤Æ¤¤¤ë¡£
*** hostC.sub.nix.co.jj can't find sub.nix.co.jj: No response from server
% named -help << INDY ¤ËÆþ¤Ã¤Æ¤¤¤¿ /usr/sbin/named ¤Î¥Ø¥ë¥×¡£
Usage: named [-d #] [-p port] [-L lamedel,rootns] [{-b} bootfile]
(3) tcpdump ¤Ç DNS ¤ÎÆ°ºî¤ò¸«¤ë
* DNS ¤Î¥¢¥¯¥»¥¹¡¦¥Ý¡Ý¥È¤Î³Îǧ
nix.co.jj ¤Î£±¼¡¥Í¡Ý¥à¥µ¡Ý¥Ð
cad.nix.co.jj ¤Î£²¼¡¥Í¡Ý¥à¥µ¡Ý¥Ð £±ËܤΥͥåȥï¡Ý¥¯¡¦¥»¥°¥á¥ó¥È¤ò£²
------- ¤Ä¤Î¥É¥á¥¤¥ó¤Ëʬ¤±¤ë¡£¾å°Ì¡¢²¼°Ì¥É
|hostA| named ¥á¥¤¥ó¤òÀßÄꤷ¤¿¡£DNS ¤ÎÏÀÍý³¬Áع½
------- ¢¢ hostB ¤¤Ç¤¢¤ë¡££²ËܤΥͥåȥï¡Ý¥¯¤Î´Ö¤Ë
ec0 | 192.9.200.1 ¡Ã192.9.200.2 ¥²¡Ý¥È¥¦¥§¥¤¤¬¤Ê¤¤¤³¤È¤ËÃí°Õ¤·¤¿¤¤¡£
----*------------------------------
|
| ------- cad.nix.co.jj ¤Î£±¼¡¥Í¡Ý¥à¥µ¡Ý¥Ð
| |hostC| named
| -------
| | 192.9.200.3
----------------------*-------------
[ hostA ]
/etc/named.boot Ãí¡¥named.rev ¤Ê¤É°ìÉô¾Êά¤·¤Æ¤¢¤ë¡£
--------------------------------------------------------------
|cache . /etc/named.ca
|primary nix.co.jj /etc/named.hosts
|secondary cad.nix.co.jj 192.9.200.3 /etc/named.hosts.sec
/etc/named.hosts
--------------------------------------------------------------
|@ IN SOA hostA.nix.co.jj. katou.hostA.nix.co.jj. (
| 1.1 ... )
| IN NS hostA.nix.co.jj.
|
|hostA IN A 192.9.200.1
|hostB IN A 192.9.200.2
[ hostC ]
/etc/named.boot
--------------------------------------------
|;cache . /etc/named.ca << ʬ¤«¤é¤Ê¤¤Ì䤤¹ç¤ï¤»¤ò¥ë¡Ý¥È
|primary cad.nix.co.jj /etc/named.hosts ¤Ç¤Ê¤¯¾å°Ì¥É¥á¥¤¥ó¤ËÁ÷¤ë¤¿¤á¡£
/etc/named.hosts
----------------------------------------------------------------------
|@ IN SOA hostC.cad.nix.co.jj. tarou.hostC.cad.nix.co.jj. (
| 1.1 ... )
| IN NS hostC.cad.nix.co.jj.
|hostC IN A 192.9.200.3
|
|nix.co.jj. IN NS hostA.nix.co.jj. << ¾å°Ì¥É¥á¥¤¥ó¤Î NS ¥ì¥³¡Ý¥É¡£
|hostA.nix.co.jj. IN A 192.9.200.1
* named-xfer £²¼¡¥Í¡Ý¥à¥µ¡Ý¥Ð¤Î¥¾¡Ý¥óžÁ÷
¾åµ¤ÎÀßÄê¤Ë¤è¤ê hostA ¤Î named ¤òºÆµ¯Æ°¤¹¤ë¤È¡¢ hostC ¤Î named.hosts ¥Õ¥¡¥¤¥ë¤ò
hostA ¤Ë /etc/named.hosts.sec ¤È¤¤¤¦Ì¾Á°¤Ç¥³¥Ô¡Ý¤·¤Æ¤¯¤ë¡£ ¤³¤Î»þ hostA ¤Î named
¥Ç¡Ý¥â¥ó¤Ï named-xfer ¤È¤¤¤¦¥×¥í¥°¥é¥à¤òµ¯Æ°¤·¤Æ¥³¥Ô¡Ý¤¹¤ë¡£hostA ¦¤Î¥Ý¡Ý¥È¤Ï²¿
ÈÖ¤ò»È¤¦¤Î¤«¼ÂºÝÄ´¤Ù¤Æ¸«¤¿¡£Ä´¤Ù¤ë¤Ë¤ÏÀ褺Ʊ¤¸¥µ¥Ö¥Í¥Ã¥È¾å¤Ë¤¢¤ë¥Û¥¹¥È¤É¤ì¤Ç¤â¤¤
¤¤¤«¤é tcpdump ¤òµ¯Æ°¤·¤Æ¤ª¤¡¢¼¡¤Ë hostA ¤Î named ¤òºÆµ¯Æ°¤¹¤ë¡£
hostA ¤«¤é¤Î¥¢¥¯¥»¥¹¤ÇǤ°Õ¤Î¥Ý¡Ý¥È¤ò»È¤Ã¤Æ¤¤¤ë¡£
% tcpdump tcp ¢
192.9.200.1.1040 > hostC.cad.nix.co.jj.domain: S 845747510:845747510(0) win
9116
hostC.cad.nix.co.jj.domain > 192.9.200.1.1040: S 1617600001:1617600001(0) ack
845747511 win 61060
192.9.200.1.1040 > hostC.cad.nix.co.jj.domain: . ack 1 win 9116
192.9.200.1.1040 > hostC.cad.nix.co.jj.domain: P 1:37(36) ack 1 win 9116
hostC.cad.nix.co.jj.domain > 192.9.200.1.1040: P 1:84(83) ack 37 win 61060
192.9.200.1.1040 > hostC.cad.nix.co.jj.domain: F 37:37(0) ack 84 win 9116
hostC.cad.nix.co.jj.domain > 192.9.200.1.1040: . ack 38 win 61060
hostC.cad.nix.co.jj.domain > 192.9.200.1.1040: F 84:84(0) ack 38 win 61060
192.9.200.1.1040 > hostC.cad.nix.co.jj.domain: . ack 85 win 9116
Ãí¡¥ÆüÉÕ¤±¤ÎÉôʬ¤Ï¤È¤Ã¤Æ¤¢¤ë¡£
* DNS ¤Ë¤è¤ë£É£Ð¥¢¥É¥ì¥¹¤Î¸¡º÷
hostC % ping hostB.nix.co.jj
hostC % tcpdump
tcpdump: listening on ec0 [0]
hostC.cad.nix.co.jj.domain > 192.9.200.1.domain: 1 (37) [a]
192.9.200.1.domain > hostC.cad.nix.co.jj.domain: 1* 1/0/0 (53) [b]
arp who-has 192.9.200.2 tell hostC.cad.nix.co.jj [c]
arp reply 192.9.200.2 is-at 8:?:??:?:??:c1 [d]
hostC.cad.nix.co.jj > 192.9.200.2: icmp: echo request [e]
192.9.200.2 > hostC.cad.nix.co.jj: icmp: echo reply
[ ²òÀâ ]
¡¦[0] tcpdump ¤Ë¸½¤ï¤ì¤ëÁ°¤Ë¡¢¼«Ê¬¼«¿È hostC ¤Î named ¤Ë hostB.nix.co.jj ¤òÃΤé
¤Ê¤¤¤«¡¢¥ì¥¾¥ë¥Ð¤¬Ì䤤¹ç¤ï¤»¤ò¤·¤Æ¤¤¤ë¡£ ¤³¤ì¤Ï hostC ¤ÎÃæ¤Ç½èÍý¤µ¤ì¤Æ¤¤¤ë
¤Î¤Ç¡¢ec0 ¥¤¥ó¥¿¡Ý¥Õ¥§¡Ý¥¹¤Ë¤Ï¸½¤ï¤ì¤Ê¤¤¤Î¤Ç¤¢¤ë¡£
¡¦[a] ¤Ç¤Ï¡¢hostC ¤Î named ¤ÏÃΤé¤Ê¤¤¤Î¤Ç¡¢¤½¤ì¤ò¿Æ¥É¥á¥¤¥ó¤Î named ¤ËÁ÷¤Ã¤Æ¤¤¤ë¡£
¡¦[b] ¤Ç¤Ï¿Æ¤Î named ¤«¤é hostC ¤Î named ¤Ë hostB ¤Î£É£Ð¥¢¥É¥ì¥¹¤òÅú¤¨¤Æ¤¤¤ë¡£
¡¦[c] ¤Ç¤Ï¥ì¥¾¥ë¥Ð¤¬ 192.9.200.2 ¤ËÂФ·¤Æ£Í£Á£Ã¥¢¥É¥ì¥¹¤ò¶µ¤¨¤í¤ÈÍ׵ᤷ¤Æ¤¤¤ë¡£
¡¦[d] ¤Ç 192.9.200.2 ¤Ï£Í£Á£Ã¥¢¥É¥ì¥¹¤òÊÖÅú¤·¤Æ¤¤¤ë¡£
¡¦[e] ¤Ç£Í£Á£Ã¥¢¥É¥ì¥¹¤âʬ¤«¤Ã¤¿¤Î¤Ç¡¢ping ¤Î ICMP ¥Ñ¥±¥Ã¥È¤ò hostB ¤ËÁ÷¤Ã¤Æ¤¤¤ë¡£
[ ÊäÂÀâÌÀ ]
¾åµ¤Î¾õÂ֤ǡ¢¤¹¤°¤â¤¦°ìÅÙƱ¤¸¤³¤È¤ò¤ä¤ë¤È [a]..[d] ¤Ï½Ð¤º¤Ë¡¢¤¤¤¤Ê¤ê ICMP ¥Ñ¥±
¥Ã¥È¤òÁ÷¤ë¡£¤³¤ì¤Ï hostC ¤Î named ¤Ë hostB.nix.co.jj ¤Î£É£Ð¥¢¥É¥ì¥¹¤¬¥¥ã¥Ã¥·¥å
¤µ¤ì¤ë¤¿¤á¤Ç¤¢¤ë¡£¤³¤ì¤Ï [a],[b] ¤¬½Ð¤Ê¤¤¤³¤È¤Ç¤ï¤«¤ë¡£ ¥¥ã¥Ã¥·¥å¤Î¾õ¶·¤ò³Îǧ¤¹
¤ë¤Ë¤Ï¡¢% kill -INT name-Process_ID ¤È¤ä¤ë¤È /var/tmp/named_dump.db ¥Õ¥¡¥¤¥ë¤Ë¥
¥ã¥Ã¥·¥å¡¦¥Ç¡Ý¥¿¤¬µ½Ò¤µ¤ì¤ë¤Î¤Ç¡¢hostB ¤Î£É£Ð¥¢¥É¥ì¥¹¤¬¤Ç¤¤Æ¤¤¤ë¤³¤È¤¬¤ï¤«¤ë¡£
[c],[d] ¤ÎÉôʬ¤Ï¡¢¤³¤Î¼Â¸³¤òƱ¤¸¥µ¥Ö¥Í¥Ã¥È¤Ë¥Û¥¹¥È¤òÇÛÃÖ¤·¤Æ¤¤¤ë¤¿¤á ARP Í×µá¤ò
½Ð¤·¤Æ¤¤¤ë¤Î¤¬¸«¤¨¤ë¤Î¤Ç¤¢¤ë¡£ÉáÄ̤Υ¤¥ó¥¿¡Ý¥Í¥Ã¥È¤Î¾õ¶·¤Ç¤Ï½Ð¤Æ¤³¤Ê¤¤¤Ï¤º¤Ç¤¢¤ë¡£
(4) Cobalt Qube3 ¤Î DNS ¤ÇÍ·¤Ö
* DNS ¥µ¡Ý¥Ð¤ÇÍ·¤ó¤Ç¤ß¤ë
Cobalt ¤Ë¥æ¡Ý¥¶ katou ¤Ç¸Ä¿ÍÍѣףףפòÀ褺ºî¤Ã¤Æ¤ª¤¯¡£¤½¤·¤Æ Cobalt ¤Î¥Í¥Ã¥È¥ï¡Ý
¥¯´Ø·¸¤ÎÀßÄê¤ò¡¢°Ê²¼¤Î¤è¤¦¤Ë¤¹¤ë¡£ ÆâÉô¥Í¥Ã¥È¥ï¡Ý¥¯¤Î¥³¥ó¥Ô¥å¡Ý¥¿¤«¤é¡¢Cobalt ¤Î
£×£×£×¥µ¡Ý¥Ð¤Ë¥Û¥¹¥È̾( FQDN )¤Ç¥¢¥¯¥»¥¹¤Ç¤¤ë¤è¤¦¤Ë¤¹¤ë¡£¤½¤Î¤¿¤á¤Ë Cobalt ¤Ç¤â
DNS ¤ò²ÔƯ¤µ¤»¡¢Cobalt ¼«¿È¤Î¥Û¥¹¥È̾²ò·è¤ò¤Ç¤¤ë¤è¤¦¤Ë¤¹¤ë¡£ ¤½¤ì¤Ë¡¢¤³¤ì¤Þ¤ÇÄÌ
¤ê³°Éô¤Ø¤Î¥¢¥¯¥»¥¹¤â¥Û¥¹¥È̾¤Ç¤Ç¤¤ë¤è¤¦¤Ë¤¹¤ë¡£
[¥·¥¹¥Æ¥à ]->[TCP/IP] ¤Ç "¥Û¥¹¥È̾" ¤ò "web"¡¢
"¥É¥á¥¤¥ó¥Í¡Ý¥à" ¤Ï "localdomain"¡£"DNS ¥µ¡Ý¥Ð(¾Êά²Ä)" ¤Ï²¿¤â½ñ¤«¤Ê¤¤¡£
[¥Í¥Ã¥È¥ï¡Ý¥¯¥µ¡Ý¥Ó¥¹] ¤Ç "DNS ¥µ¡Ý¥Ó¥¹¤ò͸ú¤Ë¤¹¤ë" ¤Ë¥Á¥§¥Ã¥¯¡£
[DNS]->[¥×¥é¥¤¥Þ¥ê¥µ¡Ý¥Ó¥¹¤òÀßÄê] ¤Ç¤Ï "web.localdomain A 192.168.1.10"¡£
¢¢ hostA' ²¾ÁۣɣР¢¢ Router ³°¸þ¤±£Ä£Î£Ó 202.241.128.3
¡Ã.3 ¡Ã.1 Æâ¸þ¤±£Ä£Î£Ó 192.168.1.10
-----------*------------------------- 202.241.128.0
.2| ¢¢ hostA, DNS Windows 98 ¤Î DNS ¸¡º÷¤ÎÀß
-------.2 ¡Ã192.168.2.1 Äê¤Ï¡¢¤³¤ì¤é£²¤Ä¤ò»ØÄꤹ¤ë¡£
|hostG|--------------- Windows 98 Àè¤ËÆâ¸þ¤±£Ä£Î£Ó¤Î£É£Ð¥¢¥É
------- ¢¢ hostB ¢£ ¢¢ ¥ì¥¹¤òµ½Ò¤·¤¿Êý¤¬¤¤¤¤¡£
.2| ¡Ã .1 ¡Ã.10 ¡Ã.20
-----------*----------------------------------- 192.168.1.0
Mail-Server Cobalt, DNS
¤³¤³¤Ç¤Ï¡¢ÆâÉô¥Í¥Ã¥È¤Ë¤¢¤ë Windows 98 ¥Ñ¥½¥³¥ó¤«¤é¡¢Cobalt¤Î£×£×£×¥µ¡Ý¥Ð¤Ë¥¢¥¯¥»
¤·¤Æ¤ß¤ë¡£http://web.localdomain/ ¤¬À褺¤Ç¤¤ë¤«¡£http://web.localdomain/~katou/
¤Ï¤É¤¦¤«¤Ê¡££É£Ð¥¢¥É¥ì¥¹¤Ç¤â¥¢¥¯¥»¥¹¤·¤Æ¤ß¤è¤¦¡£¤¦¤Þ¤¯¹Ô¤Ã¤¿¤é Cobalt ¤Î DNS¥µ¡Ý
¥Ð¤ÎÀ©¸æ¥Õ¥¡¥¤¥ë /etc/named/db.localdomain ¤òľÀÜ vi ¤Ç¤¤¤¸¤Ã¤Æ¡¢localdomain. ¤Î
£Á¥ì¥³¡Ý¥É¤òÄɲ䷤Ƥߤ롣¤³¤ì¤Ç http://localdomain/ ¤À¤±¤Ç¡¢ £×£×£×¥µ¡Ý¥Ð¤Ë¥¢¥¯
¥»¥¹¤Ç¤¤ë¤è¤¦¤Ë¤Ê¤Ã¤Æ¤¤¤ë¤Ï¤º¤À¡£
% telnet 192.168.1.10 << ¤É¤³¤«Ê̤ΣգΣɣؤ«¤é¥¢¥¯¥»¥¹¤·¤Æ¤¤¤ë¡£
Cobalt Linux release 6.0 (Carmel)
Kernel 2.2.16C7 on an i586
login: admin << login: admin ¤ÇÆþ¤Ã¤Æ¡¢su ¤Ç root ¤Ë¤Ê¤ë¡£
/etc/named.conf
--------------------------------------
|// BIND8 configuration file << ¼«Æ°À¸À®¤·¤¿À©¸æ¥Õ¥¡¥¤¥ë¡£ ¥Ï¥ó¥É¤Ç¤¤¤¸¤Ã
|options { ¤Æ¤ª¤«¤·¤¯¤Ê¤Ã¤Æ¤âÃΤé¤Ê¤¤¤è¤È±Ñ¸ì¤Ç¡¢ Ãí
| directory "/etc/named"; °Õ½ñ¤¤¬¤¢¤ë¡£
| // no forwarders defined
| // no zone transfer access defined
|};
|
|zone "." {
| type hint;
| file "db.cache"; << ÁêÂХѥ¹¤Ç /etc/named/db.cache ¥Õ¥¡¥¤¥ë¤Ë
|}; ¤Ê¤ë¡£file "/db.cache"; ¤È¤·¤¿¤éÀäÂХѥ¹
| ¤Ç¥ë¡Ý¥È¤«¤é¤Î /db.cache ¥Õ¥¡¥¤¥ë¤È¤Ê¤ë¡£
|zone "0.0.127.in-addr.arpa" {
| type master;
| file "pri.0.0.127.in-addr.arpa";
|};
|
|zone "localdomain" {
| type master;
| file "db.localdomain";
|};
/etc/named/db.localdomain
---------------------------------------------------------------
|$TTL 86400 << BIND 8 ¤Ç¤Ï TTL ÃͤϤÁ¤ã¤ó¤Èµ½Ò¤¹¤ë¤³¤È¡£
|localdomain. IN SOA web.localdomain. admin.web.localdomain. (
| 994150802 ; serial number
| 10800 ; refresh
| 3600 ; retry
| 604800 ; expire
| 86400 ; ttl
| )
|localdomain. IN NS web.localdomain.
|localdomain. IN A 192.168.1.10 << vi¤ÇÊÔ½¸¤·¤ÆÄɲä·¤¿¡£http://localdomain/
| ¤À¤±¤Ç¥¢¥¯¥»¥¹¤Ç¤¤ë¤è¤¦¤Ë¤¹¤ë¡£
|web in a 192.168.1.10
|$INCLUDE db.localdomain.include << ¶õ¤Î¥Õ¥¡¥¤¥ë¡£ £Á¥ì¥³¡Ý¥É¤Ê¤ÉÄɲä·¤¿¤±¤ì
¤Ð¡¢¤³¤Î¥Õ¥¡¥¤¥ë¤ò¤¤¤¸¤ë¤È¤¤¤¦¤³¤È¡£
/etc/named/pri.0.0.127.in-addr.arpa
------------------------------------------------------------
|$TTL 86400
|0.0.127.in-addr.arpa. IN SOA localhost. admin.localhost. (
| 2000081417 10800 3600 604800 86400 )
|0.0.127.in-addr.arpa. IN NS localhost.
|1 in ptr localhost.
# /usr/sbin/named -v << ¥Ð¡Ý¥¸¥ç¥óɽ¼¨¡£ÀΤΠnamed ¤Ï¤³¤Î¥ª¥×¥·¥ç¥ó¤Ï¤Ê¤«¤Ã¤¿¡£
named 8.2.2-P5 Wed Jun 14 17:32:48 PDT 2000
root@zerg.cobalt.com:/home/redhat/BUILD/bind-8.2.2_P5/src/bin/named
/etc/resolv.conf
-----------------------
|#nameserver 127.0.0.1 << ´ÉÍý²èÌ̤Î[¥·¥¹¥Æ¥à]->[TCP/IP] ¤Ç"DNS ¥µ¡Ý¥Ð(¾Êά²Ä)"
|search localdomain ¤Ë£É£Ð¥¢¥É¥ì¥¹¤ò½ñ¤¹þ¤à¤È¡¢¤³¤³¤Ëµ½Ò¤µ¤ì¤ë¡£ ¤³¤ÎÎã
|domain localdomain ¤Ç¤Ï 127.0.0.1 ¤È½ñ¤¹þ¤ó¤Ç¤ß¤¿¾ì¹ç¤Ç¤¢¤ë¡£
/etc/hosts
----------------------------------------------
|127.0.0.1 localhost localhost.localdomain
|192.168.1.10 web.localdomain web << # hostname ¤Ç web.localdomain ¤È
¤Ê¤Ã¤Æ¤¤¤ë¤³¤È¤â³Îǧ¤·¤Æ¤ª¤³¤¦¡£
/etc/nsswitch.conf /etc/host.conf << ¥Õ¥¡¥¤¥ë̾¤Ï hosts.conf ¤Ç¤Ï¤Ê¤¤¡£
----------------------- ------------------
|passwd: files |order hosts,bind
| | |multi on
|hosts: files dns
| |
* ¥é¥¦¥ó¥É¥í¥Ó¥ó£Ä£Î£Ó¤Ï
/etc/named/db.localdomain
---------------------------------------------------------------
|$TTL 86400
|localdomain. IN SOA web.localdomain. admin.web.localdomain. (
| | )
|localdomain. IN NS web.localdomain.
|
|web in a 192.168.1.10
|web in a 192.168.1.11 << Ʊ¤¸£É£Ð¥¢¥É¥ì¥¹¤Ç£Á¥ì¥³¡Ý¥É¤òÄɲ乤롣
|$INCLUDE db.localdomain.include Cobalt ¤Î´ÉÍý²èÌ̤«¤é¤½¤Î¤Þ¤ÞÄɲäǤ¤ë¡£
¤â¤¦£±¤Ä Cobalt ¤Ê¤ê£Å£×£Ó¤òÍÑ°Õ¤¹¤ë¤Ê¤ê¤·¤Æ¡¢¤È¤ê¤¢¤¨¤º 192.168.1.11 ¤Ç£×£×£×¥µ
¡Ý¥Ð¤ò²ÔƯ¤µ¤»¤Æ¤ª¤¯¡£¤½¤·¤ÆÆâÉô¥Í¥Ã¥È¤Î Windows 98¡¢Æ±°ì¤Î¥Ñ¥½¥³¥ó¤«¤é DOS Áë¤Ç¡¢
C:\WINDOWS>ping web.localdomain ¤È·«¤êÊÖ¤·ÂǤäƤߤ롣192.168.1.10¤òÊÖ¤¹»þ¤â¤¢¤ì
¤Ð 192.168.1.11 ¤òÊÖ¤¹»þ¤â¤¢¤ë¡£¸ò¸ß¤Ë£É£Ð¥¢¥É¥ì¥¹¤¬½Ð¤ÆÍè¤ë¤Î¤¬¡¢ËÜÅö¤Î¤è¤¦¤Êµ¤
¤¬¤¹¤ë¤Î¤À¤¬¡£°ì±þ¥é¥¦¥ó¥É¥í¥Ó¥ó£Ä£Î£Ó¤Îµ¡Ç½¤ÏƯ¤¤¤Æ¤¤¤ë¤è¤¦¤Ç¤¢¤ë¡£
(5) DNS µóÆ°¤ÎÈù̯¤Ê¤È¤³¤í `24/04
* ¤³¤Î»öÎã¤Ï¤¤¤«¤Ë
http://jprs.jp/tech/ ¤Ë¤¢¤ë¡Ö£Ä£Î£ÓºÆÆþÌç¡×"Internet Week 2002/DNS DAY"¡¢P.13 ¼«
ʬ¤Î¥¾¡Ý¥ó°Ê³°¤Î£Î£Ó»ØÄêÀßÄêÎ㣲(¤¹¤Ù¤Æ¤Î£Ä£Î£Ó¥µ¡Ý¥Ð¤¬³°Éô̾)¡¢ 2002/12/19 ¿¹²¼
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¤Ë 192.168.1.1 ¤ÇÅÐÏ¿¤µ¤ì¤Æ¤¤¤ë¡£¥æ¡Ý¥¶¤¬¥Û¥¹¥È www.aaa.con ¤Ë¥¢¥¯¥»¥¹¤·¤è¤¦¤È¤¹
¤ë¤È¡¢À褺 192.168.1.1 ¤Î¥Í¡Ý¥à¥µ¡Ý¥Ð¤ò¸«¤Ë¤¤¤¯¡£¤¹¤ë¤È ns.bbb.con ¤È ns.ccc.con
¤Î£²¤Ä¤Î¥Û¥¹¥È¤¬¤¢¤ê¡¢¥é¥¦¥ó¥É¥í¥Ó¥ó¤«¥é¥ó¥À¥à¤Ë¥Û¥¹¥È ns.bbb.con ¤ò¸«¤ë¤è¤¦¤Ë¤È
ÊÖ»ö¤¬¤¢¤Ã¤¿¡£Â¿Ê¬¥é¥¦¥ó¥É¥í¥Ó¥ó¤ÇÁª¤Ð¤ì¤ë¤Î¤À¤í¤¦¡£bbb.con ¥É¥á¥¤¥ó¤Î¥Í¡Ý¥à¥µ¡Ý
¥Ð¤Ï 192.168.2.1 ¤Ç¥ì¥¸¥¹¥È¥ê¤ËÅÐÏ¿¤µ¤ì¤Æ¤¤¤ë¡£¤½¤³¤Ë¤Ï³Î¤«¤Ë aaa.con ¥¾¡Ý¥ó¤Î¾ð
Ê󤬤¢¤Ã¤Æ¡¢www.aaa.con ¤Ï 192.168.1.2 ¤Ç¤¢¤ë¤ÈÊÖ»ö¤¬Í褿¡£¤È¤¤¤¦Î®¤ì¡£
aaa ¤Î named.conf 192.168.1.1 .2 192.168.2.1
------------------------ ¢¢ ¢¢ www ¢¢
|zone "aaa.con" { ¡Ã ¡Ã ¡Ã
| type master; ---------------- ---------
| file "named.hosts"; aaa.con bbb.con
|};
aaa ¤Î named.hosts
-------------------------------------------
|$TTL 86400
|@ IN SOA ns.aaa.con. admin.ns.aaa.con. (
| .. )
| IN NS ns.bbb.con. << aaa.con¥É¥á¥¤¥ó¤Î¥¾¡Ý¥ó¾ðÊó¤ò´ÉÍý¤¹¤ë¤Î¤Ï¤³¤Î
| IN NS ns.ccc.con. << £²¤Ä¡£aaa.con ¤Ç¤Ï¤Ê¤¤¤³¤È¤ËÃí°Õ¤·¤¿¤¤¡£
|ns IN A 192.168.1.1
aaa.con ¥É¥á¥¤¥ó¤Î¥¾¡Ý¥ó¾ðÊó¤Ï¡¢ ns.aaa.con 192.168.1.1 ¤Ë¥ª¡Ý¥½¥ê¥Æ¥£¤ò¾å°Ì
¥É¥á¥¤¥ó¤Î con ¤Ë¤è¤Ã¤ÆÍ¿¤¨¤é¤ì¤Æ¤¤¤ë¡£¤Ä¤Þ¤ê´ÉÍý¤Î¸¢¸Â¤ò°Ñ¾ù¤µ¤ì¤Æ¤¤¤ë¡£ ¤·
¤«¤·¼ÂºÝ¤Ï aaa.con ¤Î¥¾¡Ý¥ó¾ðÊó¤Ï¡¢ns.bbb.con ¤È ns.ccc.con ¤¬»ý¤Ã¤Æ¤¤¤ë¡£Îã
¤¨¤Æ¤ß¤ì¤Ð·úÀ߶ȼԤδÝÅꤲ¤ß¤¿¤¤¤ÊÏäǤ¢¤ë¡£
bbb ¤Î named.conf bbb ¤Î named_a.hosts
------------------------- -------------------------------------------
|zone "bbb.con" { |$TTL 86400
| type master; |@ IN SOA ns.aaa.con. admin.ns.aaa.con. (
| file "named_b.hosts"; | .. )
|}; | IN NS ns.aaa.con.
| |ns IN A 192.168.2.1
|zone "aaa.con" { |www IN A 192.168.1.2
| type master;
| file "named_a.hosts";
|};
* ¾å¤Î»öÎ㤫¤é¤Î¥Ï¥Æ¥Ê
°Ê²¼¤Î¤è¤¦¤ÊÀßÄê¡¢¤è¤¯¤¢¤ëŵ·¿Åª¤Ê¥Í¡Ý¥à¥µ¡Ý¥Ð¤ÎÀßÄê¤Ç¤¢¤ë¡£¤³¤ì¤Ç¡¢¤³¤Î¥Í¡Ý¥à¥µ
¡Ý¥Ð¤ò»ØÄꤷ¤¿¥¯¥é¥¤¥¢¥ó¥È¤Ï¡¢ ¥Í¡Ý¥à¥µ¡Ý¥Ð ns.aaa.con ¤È ns.provider.con ¤É¤Á¤é
¤«¤Ç̾Á°²ò·è¤¬¤µ¤ì¤ë¡£¤È¤¤¤¦¤³¤È¤Ê¤Î¤À¤í¤¦¤«¡£/etc/resolv.conf ¤Ç 192.168.1.1 ¤ò
»ØÄꤷ¤¿¤Ë¤â´Ø¤ï¤é¤º¡¢ ¤³¤Î¥Í¡Ý¥à¥µ¡Ý¥Ð¤Ï¼ÂºÝ¤Î̾Á°²ò·è¤ò ns.provider.con ¤Ë²ó¤¹
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1) ¥¯¥é¥¤¥¢¥ó¥È¤¬ www.iij.ad.jp ¤Ë¥¢¥¯¥»¥¹¤·¤¿¤¤¤ÈÌ䤤¹ç¤ï¤»¤¿¾ì¹ç¡£
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2) ¥¯¥é¥¤¥¢¥ó¥È¤¬ www.aaa.con ¤Ë¥¢¥¯¥»¥¹¤·¤¿¤¤¤ÈÌ䤤¹ç¤ï¤»¤¿¾ì¹ç¡£
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