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/etc/hosts †
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/etc/hosts ¤Î¤³¤ÎÊØÍø¤ÊÀ¼Á¤¬¡¤µÕ¤Ë cracker ¤ä virus ¤ËÍøÍѤµ¤ì¤ë¤³¤È¤¬¤¢¤ë. ÆÃ¤Ë ms-windows ¤Î virus ¤Ë¤Ï /etc/hosts ¤ËÁêÅö¤¹¤ë¥Õ¥¡¥¤¥ë(C:\WINDOWS\system32\drivers\etc\hosts ¤Ê¤É)¤òÊÔ½¸¤·¤Æ virusÂкö¥½¥Õ¥È¥¦¥§¥¢¥á¡¼¥«¤Î Web ¤Ë¥¢¥¯¥»¥¹¤Ç¤¤Ê¤¯¤¹¤ë¤è¤¦¤Ë¤¹¤ë¤â¤Î¤Ê¤É¤¬¤¢¤ë¤Î¤Ç¡¤ms-windows, MacOS, unix ¤Î¤¤¤º¤ì¤Î OS ¤ò»È¤Ã¤Æ¤¤¤ë¤Ë¤»¤è¡¤/etc/hosts ¥Õ¥¡¥¤¥ëÁêÅö¤Î¥Õ¥¡¥¤¥ë¤ÎÃæ¿È¤Ë¤Ï»þ¡¹Ãí°Õ¤òʧ¤Ã¤¿Êý¤¬¤è¤¤.
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IP Address ¤ò¼ê¤¬¤«¤ê¤È¤·¤¿¾ì¹ç¤Ï | ¤½¤Î¥Û¥¹¥È̾ |
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A | IP Address |
AAAA | IP Address(IPv6) |
NS | ¥Í¡¼¥à¥µ¡¼¥Ð |
CNAME | ¤½¤Î¥Û¥¹¥È¤ÎÀµ½à̾(¢â¿¿¤Î̾Á°) |
MX | ¤½¤Î¥¢¥É¥ì¥¹°¸¤Ë¥á¡¼¥ë¤¬Í褿¤é¤É¤Î¥á¡¼¥ë¥µ¡¼¥Ð¤ØÁ÷¤ë¤Ù¤¤«. Í¥Àè½ç°ÌÈÖ¹æ¤Ä¤. |
PTR | ¥Û¥¹¥È̾ |
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- Àµ°ú¤¤ÈµÕ°ú¤¤Î·ë²Ì¤¬À°¹ç¤·¤Ê¤¤¤È¤¤¤±¤Ê¤¤¡¤¤È¤¤¤¦¤µ¤é¤Ë¸·¤·¤¤ÀßÄê¤Î¥µ¡¼¥Ð¤â·ë¹½¤¢¤ë
- ƱÍͤΥÁ¥§¥Ã¥¯¤ò¥Ñ¥¹¤·¤Ê¤¤¤ÈÆ°¤«¤Ê¤¤¥³¥Þ¥ó¥É¤â¤¢¤ë
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¥æ¡¼¥¶¤È¤·¤Æ DNS ¤ò»È¤Ã¤Æ¤ß¤ë †
DNS ¤Î¾õÂÖÅù¤òÃΤë¥Ä¡¼¥ë(1) host †
¥µ¡¼¥Ð¤ÎÀßÄê°ÊÁ°¤Ë¡¤DNS ¾ðÊó¤òÃΤëÊýË¡¤ò°ìÈÌŪ¤ËÃΤäƤª¤³¤¦.
¤¢¤Þ¤êÃΤé¤ì¤Æ¤¤¤Ê¤¤¤è¤¦¤Ë»×¤¦¤¬¡¤"host" ¥³¥Þ¥ó¥É¤¬Àµ°ú¤¡¤µÕ°ú¤¤È¤â¤ËÊØÍø¤Ë»È¤¨¤ë.
Î㤨¤Ð
host www.osaka-u.ac.jp
¤È¤¹¤ë¤È(Àµ°ú¤)
www.osaka-u.ac.jp has address 133.1.8.5
¤ÈÅú¤¨ "133.1.8.5" ¤¬Ê֤äƤ¯¤ë¤·,
host 133.1.8.5
¤È¤¹¤ë¤È(µÕ°ú¤)
5.8.1.133.in-addr.arpa domain name pointer www.osaka-u.ac.jp.
¤ÈÅú¤¨ "www.osaka-u.ac.jp." ¤¬Ê֤äƤ¯¤ë.
host ¥³¥Þ¥ó¥É¤ÏΧµ·¤Ë¤âºÇ¸å¤Ë¥É¥Ã¥È¤ò¤Ä¤±¤Æɽ¼¨¤·¤Æ¤¤¤ë¤³¤È¤ËÃí°Õ!
¾åµ¤Î¤è¤¦¤Ë¡¤¥ª¥×¥·¥ç¥ó̵¤·¤À¤È host ¥³¥Þ¥ó¥É¤Ï¤½¤Ã¤±¤Ê¤¤¤¬¡¤"-v" ¥ª¥×¥·¥ç¥ó¤ò¤Ä¤±¤ë¤È¤¤¤í¤¤¤í¤È¾ðÊó¤ò½ÐÎϤ·¤Æ¤¯¤ì¤ë.
Î㤨¤Ð¡¤
host -v www.osaka-u.ac.jp
¤È¤¹¤ë¤È, ¼¡¤Î¤è¤¦¤Ê½ÐÎϤ¬ÆÀ¤é¤ì¤ë(·ë²ÌŪ¤Ë A, AAAA, MX ¥ì¥³¡¼¥É¤Ë¤Ä¤¤¤Æ¿Ò¤Í¤Æ¤¤¤ë)*3.
Trying "www.osaka-u.ac.jp"
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45661
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;www.osaka-u.ac.jp. IN A
;; ANSWER SECTION:
www.osaka-u.ac.jp. 62737 IN A 133.1.8.5
Received 51 bytes from 8.8.8.8#53 in 60 ms
Trying "www.osaka-u.ac.jp"
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 48978
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;www.osaka-u.ac.jp. IN AAAA
;; AUTHORITY SECTION:
osaka-u.ac.jp. 143 IN SOA a.osaka-u.ac.jp. root.odins.osaka-u.ac.jp. 2011011800 10800 1800 3600000 259200
Received 84 bytes from 8.8.8.8#53 in 51 ms
Trying "www.osaka-u.ac.jp"
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 33803
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;www.osaka-u.ac.jp. IN MX
;; AUTHORITY SECTION:
osaka-u.ac.jp. 1787 IN SOA a.osaka-u.ac.jp. root.odins.osaka-u.ac.jp. 2011011800 10800 1800 3600000 259200
Received 84 bytes from 8.8.8.8#53 in 51 ms
¤Á¤Ê¤ß¤Ë¡¤DNS Ì䤤¹ç¤ï¤»·ë²Ìɽ¼¨¤ÎÃæ¤Ç¡¤"IN" ¤ÎÁ°¤Ë¤·¤Ð¤·¤Ð¿ô¥±¥¿¤Î¿ô»ú¤¬½Ð¤Æ¤¯¤ë¤¬¡¤¤½¤Î¿ô»ú¤Ï¤½¤Î¾ðÊó¤Î»Ä¤ê͸ú´ü¸Â(ÉÃñ°Ì)¡¤¤¤¤ï¤Ð¾ÞÌ£´ü¸Â¤Ç¤¢¤ë.
¾¤Ë¤â¡¤·ë¹½Â¿Íͤʥª¥×¥·¥ç¥ó¤¬¤¢¤ë¤Î¤Ç¡¤"man host" ¤È¤·¤ÆÄ´¤Ù¤Æ¤ª¤¯¤È¤è¤¤.
¤Þ¤º¤Ï¾å¤ÈƱ¤¸¤è¤¦¤Ë¤·¤Æ host ¥³¥Þ¥ó¥É¤ò»È¤Ã¤Æ¤ß¤è¤¦.
¤Þ¤¿¡¤-v ¥ª¥×¥·¥ç¥ó¤ÎÂå¤ï¤ê¤Ë -a ¤ò»È¤Ã¤Æ¤ß¤è¤¦.
¤Þ¤¿¡¤Å¬Åö¤Ê¥Û¥¹¥È̾¤ËÂФ·¤Æ "host -v" ¤ÇÄ´¤Ù¤¿·ë²Ì¤ò¡¤¤³¤ì¤Þ¤Ç¤ÎÃ챤ò¸µ¤Ë²ò¼á¤·¤Æ¤ß¤è.
DNS ¤Î¾õÂÖÅù¤òÃΤë¥Ä¡¼¥ë(2) dig †
¶áǯ¤Ç¤Ï¡¤DNS Ì䤤¹ç¤ï¤»¤ò¼ê¤Ç¹Ô¤¦¥³¥Þ¥ó¥É¤È¤·¤Æ¤Ï "dig" ¤¬°ìÈÌŪ¤Ç¤¢¤ë.
»È¤¤Êý¤Ï host ¤Ë»÷¤Æ¤¤¤ë¤¬¤è¤êºÙ¤«¤¤*4»ØÄ꤬²Äǽ¤À.
¾Ü¤·¤¯¤Ï "man dig" ¤È "dig -h" ¤ÇÄ´¤Ù¤Æ¤â¤é¤¦¤È¤·¤Æ¡¤Â礶¤Ã¤Ñ¤Ë¤Ï¼¡¤Î¤è¤¦¤Ë¤Ä¤«¤¦.
"jman dig" ¤È¤Ï¤·¤Ê¤¤¤³¤È! ¤Ê¤¼¤«ÃΤé¤Ê¤¤¤¬¡¤dig ¤Ë´Ø¤¹¤ëÆüËܸì¥Þ¥Ë¥å¥¢¥ë¤ÏÁêÅö¤Ë¸Å¤¯¡¤¥ª¥×¥·¥ç¥óÅù¤¬º£¤Î¤â¤Î¤ÈÁ´¤¯°Û¤Ê¤ë¤Î¤À(Á´ÂΤËÆüËܸì¥Þ¥Ë¥å¥¢¥ë¤Ï¸Å¤á¤Ç¤Ï¤¢¤ë¤¬¡¤dig ¤Î¤½¤ì¤ÏÆä˸Ť¤).
Ä̾ï¤Îñ¤Ê¤ëÀµ°ú¤¤Ï
dig www.osaka-u.ac.jp
¤Ç¤è¤¤.
ñ¤Ê¤ëµÕ°ú¤¤Ï "-x" ¥ª¥×¥·¥ç¥ó¤òÍѤ¤¤Æ
dig -x 133.1.8.5
¤È¤¹¤ë.
Ì䤤¹ç¤ï¤»¤Ë»È¤¦ DNS server ¤ò»ØÄꤷ¤¿¤¤¤È¤¤Ï¡¤@¤½¤Î¥µ¡¼¥Ð ¤È¤¤¤¦Ê¸»úÎó¤ò¥ª¥×¥·¥ç¥ó¤È¤·¤Æ²Ã¤¨¤ë.
Î㤨¤Ð¡¤¾å¤Î·ë²Ì¤«¤é www.osaka-u.ac.jp ¤Î¾ðÊó¤ÎÀÕǤ¸µ¤Ç¤¢¤ë DNS Server ¤Ï a.osaka-u.ac.jp ¤Ç¤¢¤ë¤³¤È¤¬Ê¬¤«¤ë¤Î¤Ç*5,¤³¤Î¥µ¡¼¥Ð¤Ë²¿¤«¿Ò¤Í¤Æ¤ß¤ë.
dig @a.osaka-u.ac.jp www.osaka-u.ac.jp
¤È¤¹¤ë¤È¡¤
; <<>> DiG 9.6.2-P2 <<>> @a.osaka-u.ac.jp www.osaka-u.ac.jp
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 51292
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 2
;; WARNING: recursion requested but not available
;; QUESTION SECTION:
;www.osaka-u.ac.jp. IN A
;; ANSWER SECTION:
www.osaka-u.ac.jp. 259200 IN A 133.1.8.5
;; AUTHORITY SECTION:
osaka-u.ac.jp. 259200 IN NS sigw.sinet.ad.jp.
osaka-u.ac.jp. 259200 IN NS b.osaka-u.ac.jp.
osaka-u.ac.jp. 259200 IN NS a.osaka-u.ac.jp.
;; ADDITIONAL SECTION:
a.osaka-u.ac.jp. 259200 IN A 133.1.192.3
b.osaka-u.ac.jp. 259200 IN A 133.1.119.3
;; Query time: 3 msec
;; SERVER: 133.1.192.3#53(133.1.192.3)
;; WHEN: Wed Jan 5 20:18:23 2011
;; MSG SIZE rcvd: 143
¤È¤Ê¤ê¡¤¼«Ê¬¤¬ÀÕǤ¼Ô¤Ç¤¢¤ë¾ðÊó¤Ë¤Ä¤¤¤Æ¤ÏÁÇľ¤Ë¶µ¤¨¤Æ¤¯¤ì¤ë¤³¤È¤¬Ê¬¤«¤ë(status ¤ËÃíÌܤ»¤è).
¤Ç¤Ï¡¤¾¯¤·Ä´»Ò¤Ë¤Î¤Ã¤Æ¤³¤Î¥Í¡¼¥à¥µ¡¼¥Ð¤Ë¾¤ÎÌ䤤¹ç¤ï¤»¤ò¤·¤Æ¤ß¤è¤¦.
Î㤨¤Ð¡¤
dig @a.osaka-u.ac.jp www.yahoo.co.jp
¤È¤·¤Æ¤ß¤ë. ¤¹¤ë¤È¡¤
; <<>> DiG 9.6.2-P2 <<>> @a.osaka-u.ac.jp www.yahoo.co.jp
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 61423
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: recursion requested but not available
;; QUESTION SECTION:
;www.yahoo.co.jp. IN A
;; Query time: 3 msec
;; SERVER: 133.1.192.3#53(133.1.192.3)
;; WHEN: Wed Jan 5 20:18:45 2011
;; MSG SIZE rcvd: 33
¤È¤Ê¤ê("ANSWER SECTION" ¤¬Ìµ¤¤¤³¤È¡¤status ¤¬ "REFUSED" ¤Ë¤Ê¤Ã¤Æ¤¤¤ë¤³¤È¡¤¤Ê¤É¤ËÃíÌܤ»¤è)¡¤¡Ö¤½¤Î¾ðÊó¤ÏËÍ¤Î´É³í¤¸¤ã¤Ê¤¤¤è¡×¤È¤¤¤¦ÊÖÅú¤Ë¤Ê¤Ã¤Æ¤¤¤ë¤³¤È¤¬Ê¬¤«¤ë.
¤Á¤Ê¤ß¤Ë¡¤DNS Server ¤¬¤É¤¦¤¤¤¦ÆâÍƤˤɤ¦ÊÖÅú¤·¤Æ¤¯¤ì¤ë¤«¤ÏÌ䤤¹ç¤ï¤»ÆâÍƤȤ½¤Î¥µ¡¼¥Ð¤ÎÀßÄê¤ÈÌ䤤¹ç¤ï¤»¤ë¿Í¤Î´Ø·¸¤Ë°Í¸¤¹¤ë. ¾Ü¤·¤¯¤Ï¤¢¤È¤Ç¤ï¤«¤ë¤À¤í¤¦¡¥
¤µ¤Æ¡¤dig ¤Ï +trace ¤È¤¤¤¦¥ª¥×¥·¥ç¥ó¤ò¤Ä¤±¤ë¤ÈÀ¸¿¿ÌÌÌܤ˼«Ê¬¤¬ºÆµ¢ÅªÆ°ºî¤ò¹Ô¤¦¤Î¤Ç¡¤DNS ¤Î»ÅÁȤߤòÃΤë¤Î¤ËÅԹ礬¤è¤¤.
¤â¤¦¾¯¤·¾Ü¤·¤¯½ñ¤¯¤È¡¤¤³¤Î¥ª¥×¥·¥ç¥óÉÕ¤¤Ç¤Î dig ¤Ï¡¤Ì䤤¹ç¤ï¤»À襵¡¼¥Ð¤Ë¡ÖÈóºÆµ¢Åª¤ËÅú¤¨¤Æ¤Í¡×¤ÈÍê¤à(¤Ä¤Þ¤ê¡¤Ì䤤¹ç¤ï¤»¤ò´ÝÅꤲ¤·¤Ê¤¤).
µÕ¤Ë¸À¤¨¤Ð¡¤Ä̾ï¤Î dig ¥³¥Þ¥ó¥É¤Ï¼ÁÌä¤òºÇ´ó¤ê¤Î DNS Server¤Ë¡Ö´ÝÅꤲ¡×¤·¤Æ¤¤¤ë¤À¤±¤Ç¡¤¼«Ê¬¤Ï²¿¤â¶ìÏ«¤·¤Æ¤¤¤Ê¤¤¤Î¤À.
¤Ä¤Þ¤ê¡¤+trace ¤Ä¤¤Ç dig ¥³¥Þ¥ó¥É¤ò»È¤Ã¤¿¤È¤¤Ï¡¤³Æ¡¹¤Î¥µ¡¼¥Ð¤Ïñ¤Ë¼ê»ý¤Á¤ÎÃμ±¤ÇºÇ¤â¥Þ¥·¤ÊÅú¤¨¤òÊÖ¤·¤Æ¤¯¤ë¤Î¤Ç¡¤¤½¤Î²ò¼á¤È¤Ä¤Ê¤®¤¢¤ï¤»¤Ï dig ¼«¿È¤¬¹Ô¤¦¤Î¤Ç¤¢¤ë.
Î㤨¤Ð¡¤
dig +trace www.osaka-u.ac.jp
¤È¤¹¤ë¤È¡¤
; <<>> DiG 9.6.2-P2 <<>> +trace www.osaka-u.ac.jp
;; global options: +cmd
. 3103 IN NS a.root-servers.net.
. 3103 IN NS b.root-servers.net.
. 3103 IN NS c.root-servers.net.
. 3103 IN NS d.root-servers.net.
. 3103 IN NS e.root-servers.net.
. 3103 IN NS f.root-servers.net.
. 3103 IN NS g.root-servers.net.
. 3103 IN NS h.root-servers.net.
. 3103 IN NS i.root-servers.net.
. 3103 IN NS j.root-servers.net.
. 3103 IN NS k.root-servers.net.
. 3103 IN NS l.root-servers.net.
. 3103 IN NS m.root-servers.net.
;; Received 228 bytes from 8.8.8.8#53(8.8.8.8) in 50 ms
jp. 172800 IN NS a.dns.jp.
jp. 172800 IN NS b.dns.jp.
jp. 172800 IN NS c.dns.jp.
jp. 172800 IN NS d.dns.jp.
jp. 172800 IN NS e.dns.jp.
jp. 172800 IN NS f.dns.jp.
jp. 172800 IN NS g.dns.jp.
;; Received 431 bytes from 198.41.0.4#53(a.root-servers.net) in 65 ms
osaka-u.ac.jp. 86400 IN NS b.osaka-u.ac.jp.
osaka-u.ac.jp. 86400 IN NS a.osaka-u.ac.jp.
osaka-u.ac.jp. 86400 IN NS sigw.sinet.ad.jp.
;; Received 127 bytes from 210.138.175.244#53(d.dns.jp) in 18 ms
www.osaka-u.ac.jp. 259200 IN A 133.1.8.5
osaka-u.ac.jp. 259200 IN NS sigw.sinet.ad.jp.
osaka-u.ac.jp. 259200 IN NS b.osaka-u.ac.jp.
osaka-u.ac.jp. 259200 IN NS a.osaka-u.ac.jp.
;; Received 143 bytes from 133.1.119.3#53(b.osaka-u.ac.jp) in 3 ms
¤Ê¤É¤Î¤è¤¦¤ÊÊÖÅú¤¬Ê֤äƤ¯¤ë.
¤³¤ì¤ò¤ß¤ë¤È¡¤
- »È¤Ã¤Æ¤¤¤ë DNS ¥µ¡¼¥Ð(¤³¤Î¾ì¹ç¤ÏÎã¤È¤·¤Æ 8.8.8.8 ¤ò»È¤Ã¤Æ¤¤¤ë)¤Ø¤ÎÌ䤤¹ç¤ï¤»¤Î·ë²Ì¤È¤·¤Æ¤Þ¤º "."(¥ë¡¼¥È¥É¥á¥¤¥ó)ôÅö¤Î NS
¤¬ 13Â椢¤ë¤³¤È¤òÃΤë(¥Õ¥ë¥µ¡¼¥Ó¥¹¥ê¥¾¥ë¥Ð¤È¸Æ¤Ð¤ì¤ë¥ê¥¾¥ë¥Ð¤Ï¡¤¤¿¤¤¤Æ¤¤ºÇ½é¤«¤é¤³¤Î 13Âæ¤òÃΤäƤ¤¤ë). - ¤½¤Î 13Âæ¤ÎÃæ¤Î a.root-servers.net ¤Ë "jp." ôÅö¤Î NS ¤¬ 7Â椢¤ë¤È¶µ¤¨¤Æ¤â¤é¤Ã¤Æ¡¤
- ¤½¤Î 7Âæ¤ÎÃæ¤Î d.dns.jp ¤Ë "osaka-u.ac.jp." ôÅö¤Î NS ¤¬ 3Â椢¤ë¤È¶µ¤¨¤Æ¤â¤é¤Ã¤Æ¡¤
- ¤½¤Î 3Âæ¤ÎÃæ¤Î b.osaka-u.ac.jp ¤Ë www.osaka-u.ac.jp. ¤Î¥¢¥É¥ì¥¹¤ò¶µ¤¨¤Æ¤â¤é¤Ã¤¿
¤È¤¤¤¦Î®¤ì¤Ç¸¡º÷¤·¤¿¤³¤È¤¬¤è¤¯Ê¬¤«¤ë.
¤¿¤À¤·¡¤Ä̾ï¤Ï¡¤¤Ê¤ë¤Ù¤¯¥Í¥Ã¥È¥ï¡¼¥¯¾å¤òή¤ì¤ë¾ðÊ󤬾¯¤Ê¤¯¤ÆºÑ¤à¤è¤¦¤Ë¥¥ã¥Ã¥·¥å¤Ê¤É¤ÎÍÍ¡¹¤Ê¹©Éפ¬ÍѤ¤¤é¤ì¤Æ¤¤¤ë¤Î¤Ç¡¤¤³¤Î¤è¤¦¤ËÇϼ¯ÀµÄ¾¤ËÌ䤤¹ç¤ï¤»¤¬¿Ê¤à¤ï¤±¤Ç¤Ï¤Ê¤¤.
¥ë¡¼¥È¥µ¡¼¥Ð¤Î½ÅÍ×À¤È¥»¥¥å¥ê¥Æ¥£ †
¤³¤³¤Ç¡¤¾å¤Ë½Ð¤Æ¤¤¿¥ë¡¼¥È¥É¥á¥¤¥óôÅö¤Î DNS¥µ¡¼¥Ð(¥ë¡¼¥È¥µ¡¼¥Ð¤È¸Æ¤Ð¤ì¤ë)¤Ë¤Ä¤¤¤Æµ½Ò¤·¤Æ¤ª¤³¤¦.
¤³¤Î¥ë¡¼¥È¥µ¡¼¥Ð¤Ï¡¤DNS ¤ÎÁí¸µÄù¤Ç¤¢¤ë¤Î¤Ç¡¤¤³¤ì¤é¤¬¤¤Á¤ó¤Èµ¡Ç½¤·¤Ê¤¤¤È¥¤¥ó¥¿¡¼¥Í¥Ã¥È¤½¤Î¤â¤Î¤¬¤¤Á¤ó¤Èµ¡Ç½¤·¤Ê¤¤. "The Internet" ¤Î¡ÖÍספȤ¤¤Ã¤Æ¤è¤¤¤À¤í¤¦.
¤Þ¤¿µÕ¤Ë¸À¤¨¤Ð¡¤¥¤¥ó¥¿¡¼¥Í¥Ã¥È¤Ø¤Î¹¶·â¼Ô¤«¤é¤ß¤ì¤Ð¥ë¡¼¥È¥É¥á¥¤¥ó¤³¤½¤¬¹¶·âÂоݤȤ·¤ÆºÇ¤â½ÅÍפʤâ¤Î¤Î°ì¤Ä¤È¤¤¤¦¤³¤È¤Ë¤Ê¤ë.
¤½¤Î¤¿¤á¡¤¤³¤ì¤Þ¤Ç¤Ë¤âÂ絬ÌϤγƼﹶ·â¤Ë¤¿¤Ó¤¿¤Ó¤µ¤é¤µ¤ì¤Æ¤¤¤ë.
¤·¤«¤·¡¤13Â椬À¤³¦³ÆÃϤ˻¶¤Ã¤Æ¤¤¤ë¤³¤È¤ä»ÈÍѤ¹¤ë¥½¥Õ¥È¥¦¥§¥¢¤ò¡Ö¤ï¤¶¤È°Û¤Ê¤ë¤â¤Î¤Ë¤·¤Æ¤¢¤ë¡×¤³¤È¤Ê¤É¤«¤é»ý¤Á´®¤¨¤Æ¤¤¿¤È¤¤¤¦Îò»Ë¤¬¤¢¤ë.
¥ë¡¼¥È¥µ¡¼¥Ð¤ËÂФ¹¤ë¤³¤ì¤Þ¤Ç²Ã¤¨¤é¤ì¤¿¹¶·â¤ä¤½¤Î·Ð°Þ¤Ë¤Ä¤¤¤ÆÄ´¤Ù¤Æ¤ª¤³¤¦. ¥»¥¥å¥ê¥Æ¥£¤òÊݤĤ¿¤á¤Ë¤É¤¦¤¹¤ì¤Ð¤è¤¤¤«¤È¤¤¤¦Îɤ¤³Ø½¬»ñÎÁ¤Ë¤Ê¤ë¤Ï¤º¤À.
¤Á¤Ê¤ß¤Ë¡¤¥¤¥ó¥¿¡¼¥Í¥Ã¥È¤ò»Ù¤¨¤ë¥ë¡¼¥È¥É¥á¥¤¥óôÅö¥µ¡¼¥Ð13*6¤Î´ÉÍýµ¡´Ø¤¦¤Á¤ï¤±¤Ï¡¤¤«¤Ä¤Æ¤Ï¥¢¥á¥ê¥«¤¬ 10, ÆüËܤ¬ 1, ¥Î¥ë¥¦¥§¡¼¤¬ 1, ¥ª¥é¥ó¥À¤¬ 1 ¤Ç¤¢¤ë¤È¤µ¤ì¤Æ¤¤¤¿(º£¤Ï¤«¤Ê¤êʬô¤¬¤¹¤¹¤ß¡¤1¤Ä¤Î¥ë¡¼¥È¥É¥á¥¤¥ó¤ò¤¤¤¯¤Ä¤â¤Î¹ñ¤ÎÁÈ¿¥¤Ç»Ù¤¨¤ë¤è¤¦¤Ë¤Ê¤Ã¤Æ¤¤Æ¤¤¤ë¤Î¤Ç¡¤¤³¤Î¤è¤¦¤Êñ½ã¤ÊʬÎà¤ÏÆñ¤·¤¤).
¤³¤¦¤·¤¿¾ðÊó¤Ï http://www.root-servers.org/ ¤Ë¥ê¥¹¥È¤¬¤¢¤ë¤Î¤Ç¡¤µ¤¤Ë¤Ê¤ë¿Í¤Ï¸«¤Æ¤ß¤è¤¦.
DNS ¤Î¾õÂÖÅù¤òÃΤë¥Ä¡¼¥ë(3) nslookup †
dig ¤¬¹¤¯ÃΤé¤ì¤ëÁ°¤Ï¤è¤¯»È¤ï¤ì¤Æ¤¤¤¿¤Î¤¬¤³¤Î "nslookup" ¥³¥Þ¥ó¥É¤Ç¤¢¤ë.
¤¢¤ë¾ò·ï¤òËþ¤¿¤µ¤Ê¤¤Ì䤤¹ç¤ï¤»¤ò¤½¤â¤½¤â¼õ¤±ÉÕ¤±¤Ê¤¤¤³¤È¤ä¡¤¼ÂÁõ¤¬ÃæÅÓȾü¤Ç¤¢¤ë¤³¤È¤Ê¤É¤«¤é¡ÖÉå¤Ã¤Æ¤¤¤ë¡×¤È°¸ý¤ò¸À¤ï¤ì¤¿¤ê¤·¤Æ¤¢¤Þ¤ê»È¤ï¤ì¤Ê¤¯¤Ê¤Ã¤Æ¤¤Æ¤¤¤ë¤¬¡¤cygwin ¤Ë¤âºÜ¤Ã¤Æ¤¤¤ë¤³¤È¤äÂÐÏå⡼¥É¤Î¤ªµ¤³Ú¤µÅù¤ò¹Í¤¨¤ë¤È¡¤¤Þ¤¢¡¤¤½¤³¤Þ¤Ç¤Ò¤É¤¤¥Ä¡¼¥ë¤Ç¤Ï¤Ê¤¤(^-^)
"man nslookup" ¤È¤·¤Æ nslookup ¤Î¥Þ¥Ë¥å¥¢¥ë¤òÆɤó¤Ç¤ª¤³¤¦.
host, dig, nslookup ¤Ë¤Ä¤¤¤Æ¥Þ¥Ë¥å¥¢¥ë¤ÇÄ´¤Ù¤¿¸å¡¤¤¤¤¯¤Ä¤«¤Î¥Û¥¹¥È¤Ë¤Ä¤¤¤Æ¤³¤ì¤é¤Î¥³¥Þ¥ó¥É¤Ç(Àµ°ú¤¤Ç)¥ì¥³¡¼¥É A, MX ¤Ë¤Ä¤¤¤ÆÄ´¤Ù¤Æ¤ß¤è.
¤Þ¤¿¡¤¤ª¤è¤ÓÆÀ¤é¤ì¤¿ IP ¥¢¥É¥ì¥¹¤ò¸µ¤ËµÕ°ú¤¤ò¹Ô¤Ã¤Æ¤ß¤è.
¤Þ¤¿¡¤¼«Ê¬¤Î·ÈÂӤΥ᡼¥ë¥¢¥É¥ì¥¹¤Ë¥á¡¼¥ë¤ò½Ð¤¹¾ì¹ç¡¤¤½¤Î¥á¡¼¥ë¤ò¼õ¤±¼è¤ë¥µ¡¼¥Ð¤Ï¤É¤³¤«¤òÄ´¤Ù¤Æ¤ß¤è.
DNS µÕ°ú¤¤Î»ÅÁÈ¤ß †
BIND ¤ÎÀßÄê¤ò»Ï¤á¤ëÁ°¤Ë¡¤µÕ°ú¤¤Î»ÅÁȤߤˤĤ¤¤Æ¤â¿¨¤ì¤Æ¤ª¤³¤¦.
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¶ñÂÎŪ¤Ë¤Ï¡¤"in-addr.arpa." ¤È¤¤¤¦µÕ°ú¤ÀìÍѤÎÆÃÊ̤ʥɥᥤ¥ó¤Î²¼¤Ë¡¤IP ¥¢¥É¥ì¥¹¤òµÕ¸þ¤¤Ë¤·¤Æ¥Û¥¹¥È̾¤È¤ß¤Ê¤·¤Æ DNS ¤Ç¼è¤ê°·¤¦.
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Î㤨¤Ð¡¤192.168.125.91 ¤È¤¤¤¦ IP ¥¢¥É¥ì¥¹¤Ï¡¤91.125.168.192.in-addr.arpa. ¤È¤¤¤¦¥Û¥¹¥È̾¤Ç DNS ¤ÇÅÐÏ¿¡¤¸¡º÷¤µ¤ì¤ë¤³¤È¤Ë¤Ê¤ë.
µÕ°ú¤ÀßÄê¤Ç¤Ï¤³¤ÎÃ챤¬É¬ÍפʤΤdzФ¨¤Æ¤ª¤³¤¦.
dig ¥³¥Þ¥ó¥É¤Ê¤É¤Ç¡¤¾å¤Î»ÅÁȤߤò¼Â´¶¤·¤Æ¤ß¤è¤¦.
¶ñÂÎŪ¤Ë¤Ï¡¤Î㤨¤Ð¥Þ¥·¥ó q01.cl.math.sci.osaka-u.ac.jp = 192.168.125.91 ¤ËÂФ·¤Æ
host -t PTR 91.125.168.192.in-addr.arpa.
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91.125.168.192.in-addr.arpa domain name pointer q01.cl.math.sci.osaka-u.ac.jp.
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ƱÍͤˡ¤dig ¥³¥Þ¥ó¥É¤Ç¤â¡¤
dig -t PTR 91.125.168.192.in-addr.arpa.
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nslookup -q=PTR 91.125.168.192.in-addr.arpa.
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¾å¤ÎÎã¤Ç¤Ï¡¤Ì䤤¹ç¤ï¤»¥¿¥¤¥×¤ò¥ì¥³¡¼¥É "PTR" ¤Ë¤·¤Æ¤¤¤ë¤¬¡¤¤³¤ì¤Ï "ANY" ¤Ë¤·¤Æ¤â¤è¤¤¤À¤í¤¦.
¼«Ê¬¤Î¥Þ¥·¥ó¤Î IP ¥¢¥É¥ì¥¹¤ò»È¤Ã¤Æ¡¤¾å¤Î host, dig, nslookup ¥³¥Þ¥ó¥É¤ò¹Ô¤Ê¤¤¡¤¼«Ê¬¤Î¥Þ¥·¥ó̾¤¬¤¤Á¤ó¤ÈÊ֤äƤ¯¤ë¤«³Î¤«¤á¤Æ¤ß¤è¤¦.
DNS Ì䤤¹ç¤ï¤»¥¯¥é¥¤¥¢¥ó¥È¤ÎÀßÄê †
¥µ¡¼¥Ð BIND¤ÎÀßÄê¤ÎÁ°¤Ë¡¤DNS ¤ÎÌ䤤¹ç¤ï¤»¤ÎÀßÄê¤Ï FreeBSD ¤Ç¤É¤Î¤è¤¦¤Ë¤µ¤ì¤Æ¤¤¤ë¤«½ñ¤¤¤Æ¤ª¤³¤¦.
FreeBSD ¤Ç¤Ï DNS Ì䤤¹ç¤ï¤»¤ò¹Ô¤¦»þ¤ÎÀßÄê¤Ï´ðËÜŪ¤Ë /etc/resolv.conf ¤È¤¤¤¦¥Õ¥¡¥¤¥ë¤Ë½ñ¤¹þ¤à¤³¤È¤Ë¤Ê¤Ã¤Æ¤¤¤ë.
¾ÜºÙ¤Ï man resolv.conf ¤â¤·¤¯¤Ï jman resolv.conf ¤È¤·¤Æ¥Þ¥Ë¥å¥¢¥ë¤òÆɤó¤Ç¤â¤é¤¦¤³¤È¤Ë¤·¤Æ¡¤ºÇÄã¸Â¤ÎÀâÌÀ¤ò½ñ¤¤¤Æ¤ª¤³¤¦.
¥ª¥×¥·¥ç¥ó | Îã(¤É¤ì¤â1¹Ô¤Ç½ñ¤«¤ì¤ë) | ÀâÌÀ |
nameserver | nameserver 192.168.125.14 | DNS ¤Î(ºÆµ¢Åª)Ì䤤¹ç¤ï¤»Àè. ¤â¤Á¤í¤ó¼õ¤±ÉÕ¤±¤Æ¤¯¤ì¤ëÁê¼ê¤Ç¤Ê¤¤¤È¤¤¤±¤Ê¤¤. nameserver ¥ª¥×¥·¥ç¥ó¤Ï 3¤Ä¤Þ¤Ç»ØÄê¤Ç¤¡¤¾å¤«¤é½ç¤Ë»î¤µ¤ì¤ë. |
domain | domain cl.math.sci.osaka-u.ac.jp | ¥í¡¼¥«¥ë¥É¥á¥¤¥ó̾. ¤³¤ì¤ò½ñ¤¤¤Æ¤ª¤±¤Ð¡¤¥í¡¼¥«¥ë¥É¥á¥¤¥ó¤Ë½ê°¤¹¤ë¥Û¥¹¥È¤ò¸¡º÷¤¹¤ëºÝ¤ËºÇ½é¤Î . °Ê¹ß¤ò¾Êά¤Ç¤¤ë. search ¤È¤ÏÇÓ¾Ū. |
search | search math.sci.osaka-u.ac.jp sci.osaka-u.ac.jp | ¸¡º÷¤ÎºÝ¡¤Êä´°¤¹¤ë¤¿¤á¤Ë»È¤ï¤ì¤ë¥É¥á¥¤¥ó¤Î¥ê¥¹¥È. ¶õÇò¤Ç¶èÀÚ¤ë. domain ¤È¤ÏÇÓ¾Ū. |
/etc/resolv.conf ¤Î search ¥ª¥×¥·¥ç¥ó¤òÀßÄꤷ¤Æ¡¤³èÍѤ·¤Æ¤ß¤è¤¦.
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search cl.math.sci.osaka-u.ac.jp math.sci.osaka-u.ac.jp sci.osaka-u.ac.jp
¤È¤¤¤¦¹Ô¤ò /etc/resolv.conf ¤Ë²Ã¤¨¤¿¸å¡¤
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host www
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dig +search -t ANY mail
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dig ¥³¥Þ¥ó¥É¤Ï¡¤¥Ç¥Õ¥©¥ë¥È¤Ç¤Ï search ¥ª¥×¥·¥ç¥ó¤ò̵»ë¤¹¤ë¤Î¤Ç, +search ¤È¤·¤Æ¤ª¤¯.
DNS ¥µ¡¼¥Ð¤Î¿½Å²½ †
¤µ¤Æ¡¤¤½¤í¤½¤í DNS ¥µ¡¼¥Ð¤ÎÏÃ¤Ë°Ü¤í¤¦.
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DNS ¥µ¡¼¥Ð¤Ï¥¤¥ó¥¿¡¼¥Í¥Ã¥È¤ÇÈó¾ï¤Ë½ÅÍפÊÌò³ä¤ò²Ì¤¿¤¹¤â¤Î¤Ç¤¢¤ë¤Î¤Ç¡¤¤¢¤ë¥É¥á¥¤¥ó¾ðÊó¤ò¸øŪ¤Ë´ÉÍý¤·¤Æ¤¤¤ë¥µ¡¼¥Ð¤¬ 1Â椷¤«¤Ê¤¤¡¤¤È¤¤¤¦¾õÂ֤Ϥ¢¤Þ¤ê¤Ë¤â¿´ºÙ¤¯¡¤Èò¤±¤ë¤Ù¤¤Ç¤¢¤ë.
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¤¤¤Þ¤Þ¤Ç dig Åù¤Ç DNS ¾ðÊó¤ò¸«¤¿¤È¤¤Ë¡¤¤É¤Î¥É¥á¥¤¥ó¤ÎôÅö¥µ¡¼¥Ð¤âÊ£¿ô¤¢¤Ã¤¿¤³¤È¤ò»×¤¤½Ð¤½¤¦.
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¤³¤ì¤Ï¡¤1¤Ä¤Î¥¾¡¼¥ó(1¤Ä¤Î DNS ¾ðÊó¤ÎÀÕǤÈϰϤȻפ¨¤Ð¤è¤¤)¤Ë¤Ä¤¤¤Æ¡¤¤½¤Î¥ª¥ê¥¸¥Ê¥ë¾ðÊó¤ò¤â¤Ä¥µ¡¼¥Ð ¥Þ¥¹¥¿¡¼¥µ¡¼¥Ð ¤ò1Âæ¤È¡¤¤½¤Î¥³¥Ô¡¼¾ðÊó¤ò¤â¤Ä¥µ¡¼¥Ð ¥¹¥ì¡¼¥Ö¥µ¡¼¥Ð ¤ò 1Âæ°Ê¾åÍÑ°Õ¤¹¤ë¤³¤È¡¤¤È¤·¤Æ¼Â¸½¤µ¤ì¤ë.
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DNS ¥µ¡¼¥Ð¤Î¿Æ»Ò´Ø·¸ †
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sub.aaa.com. IN NS ns.sub.aaa.com.
ns.sub.aaa.com. IN A 192.168.125.105
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º®Í𤷤¬¤Á¤Ç¤¢¤ë¤¬¡¤BIND ¤¬ºî¤ë¥³¥Þ¥ó¥É¤Ï named (̾Á°²ò·è¤Î¥Ç¡¼¥â¥ó¡¤¤È¤Ç¤â»×¤¨¤Ð¤è¤¤¤À¤í¤¦)¤È¤¤¤¦Ì¾Á°¤Ç¤¢¤ê¡¤¥Þ¥Ë¥å¥¢¥ë¤ä¥Ç¥£¥ì¥¯¥È¥ê̾¤Ï´ðËÜŪ¤Ë "named" ¤È¤¤¤¦Ì¾Á°¤¬»È¤ï¤ì¤ë¤Î¤ÇÃí°Õ¤·¤¿¤¤.
¤½¤·¤Æ BIND ¤¬Æ°¤¤¤Æ¤¤¤ë¤è¤¦¤Ê¾ì¹ç¤Ï kill ¥³¥Þ¥ó¥É¤Ê¤É¤òÍѤ¤¤ÆÆ°ºî¤òÄä¤á¡¤¤µ¤é¤Ë /etc/rc.conf ¤ò½¤Àµ¤·¤Æ¼¡²óµ¯Æ°»þ¤«¤é¤Ï BIND ¤¬Æ°¤«¤Ê¤¤¤è¤¦¤Ë¤·¤è¤¦(BIND ¤¬Æ°¤¤¤Æ¤¤¤ë¤Ê¤é¤Ð¤ª¤½¤é¤¯ rc.conf Ãæ¤Ë named_enable="YES" ¤È¤¤¤¦ÀßÄ꤬¤¢¤ë¤Ï¤º¤À¤«¤é¤³¤ÎÀßÄê¤òÊѹ¹¤¹¤ì¤ÐÎɤ¤)¡¥
BIND ¤ò¥¢¥ó¥¤¥ó¥¹¥È¡¼¥ë¤¹¤ëɬÍפϤʤ¤¡¥
¥¤¥ó¥¹¥È¡¼¥ë †
¤¤¤Ä¤â¤Î¤è¤¦¤Ë portsnap ¤ò¤¤Á¤ó¤È¤·¤Æ¤«¤é¡¤
portinstall dnsmasq
¤ÇÂç¾æÉפʤϤº¡¥
¤½¤ÎºÝ¡¤¥ª¥×¥·¥ç¥ó¤òʹ¤«¤ì¤ë¤¬¡¤
¤Î¤è¤¦¤Ë IPv6 ¤ò³°¤·¤Æ¤ª¤±¤Ð¤è¤¤¤À¤í¤¦¡¥
¤µ¤Æ¡¤¥¤¥ó¥¹¥È¡¼¥ë»þ¤Ë½Ð¤Æ¤¯¤ë¥á¥Ã¥»¡¼¥¸(¥í¥°¤ò¸«¤ë¤ÈÎɤ¤)¤Ç½ÅÍפ½¤¦¤Ê¤Î¤Ï
*** To enable dnsmasq, edit /usr/local/etc/dnsmasq.conf and
*** set dnsmasq_enable="YES" in /etc/rc.conf[.local]
¤È
===> SECURITY REPORT:
This port has installed the following files which may act as network
servers and may therefore pose a remote security risk to the system.
/usr/local/sbin/dnsmasq
This port has installed the following startup scripts which may cause
these network services to be started at boot time.
/usr/local/etc/rc.d/dnsmasq
If there are vulnerabilities in these programs there may be a security
risk to the system. FreeBSD makes no guarantee about the security of
ports included in the Ports Collection. Please type 'make deinstall'
to deinstall the port if this is a concern.
For more information, and contact details about the security
status of this software, see the following webpage:
¤È¤¤¤¦¤¢¤¿¤ê¤À¡¥
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- dnsmasq ¤ÎÀßÄê¥Õ¥¡¥¤¥ë¤Ï /usr/local/etc/dnsmasq.conf ¤Ç¤¢¤ë¡¥
- dnsmasq ¤ò͸ú¤Ë¤¹¤ë¤Ë¤Ï¡¤/etc/rc.conf ¤Ë dnsmasq_enable="YES" ¤È½ñ¤±¤ÐÎɤ¤¡¥
¤È¤¤¤¦¤³¤È¤¬¤ï¤«¤ê¡¤¼¡¤Î¹àÌܤÇ
- dnsmasq ¤Îµ¯Æ°¥¹¥¯¥ê¥×¥È¤Ï /usr/local/etc/rc.d/dnsmasq ¤Ç¤¢¤ë¡¥
¤³¤È¤¬¤ï¤«¤ë¡¥
ÀßÄê †
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dnsmasq ¤ÎÀßÄê¤Î¥Ç¥Õ¥©¥ë¥È¤ÏÈó¾ï¤ËÁÇľ¤Ê¤Î¤Ç¡¤ºÇÄã¸Â¤È¤·¤Æ
- /etc/hosts Ãæ¤Î dnsmasq ¤¬Íý²ò½ÐÍè¤Ê¤¤ÀßÄê¤òºï½ü¤·¤Æ¤ª¤¯
- µ¯Æ°»þ¤Ë dnsmasq ¤¬Æ°ºî¤ò»Ï¤á¤ë¤è¤¦¤Ë¤¹¤ë
- ̾Á°²ò·è¤ò dnsmasq ¤ËÍê¤à¤è¤¦¤ËÀßÄꤹ¤ë
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/etc/hosts Ãæ¤Î dnsmasq ¤¬Íý²ò½ÐÍè¤Ê¤¤ÀßÄê¤òºï½ü¤·¤Æ¤ª¤¯ †
/etc/hosts Ãæ¤Ë¤Ï¡¤IPv6 ¤ÎÀßÄ꤬»þ¡¹Ê¶¤ì¹þ¤ó¤Ç¤¤¤¿¤ê¤¹¤ë¡¥
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::1¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡localhost ¤Û¤²¤Û¤²¡Ä
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µ¯Æ°»þ¤Ë dnsmasq ¤¬Æ°ºî¤ò»Ï¤á¤ë¤è¤¦¤Ë¤¹¤ë †
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dnsmasq_enable="YES"
¤ò /etc/rc.conf ¤Ë½ñ¤¤¤ÆºÆµ¯Æ°¤¹¤ì¤Ð¤è¤¤¡¥
̾Á°²ò·è¤ò dnsmasq ¤ËÍê¤à¤è¤¦¤ËÀßÄꤹ¤ë †
/etc/resolv.conf ¤ÎÀèƬ¹Ô¤Ë
nameserver 127.0.0.1
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IP ¥¢¥É¥ì¥¹ 127.0.0.1 ¤È¤¤¤¦¤Î¤Ï¼«Ê¬¼«¿È¤Î¤³¤È¤À¡¥
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dnsmasq ¤¬Æ°¤¤¤Æ¤¤¤ë¤«³Îǧ †
BIND ¤ÎÆ°ºî¥Á¥§¥Ã¥¯¤ò¹Ô¤Ã¤¿»þƱÍͤˡ¤
lsof -i4 | less ps -axuww | less
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dig www.osaka-u.ac.jp
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; <<>> DiG 9.6.2-P2 <<>> www.osaka-u.ac.jp
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10480
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;www.osaka-u.ac.jp. IN A
;; ANSWER SECTION:
www.osaka-u.ac.jp. 58211 IN A 133.1.8.5
;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Jan 26 19:41:24 2011
;; MSG SIZE rcvd: 51
¤È¤¤¤¦¤è¤¦¤Ë¡¤127.0.0.1(¼«Ê¬¼«¿È)¤¬²òÅú¤òÊÖ¤¹¤Î¤Ç¡¤¼«Ê¬¼«¿È¤Î¾å¤Ç DNS ²ò·è¤ò¹Ô¤¦¥½¥Õ¥È¥¦¥§¥¢¤¬Æ°¤¤¤Æ¤¤¤ë¤³¤È¤Ë¤Ê¤ê¡¤dnsmasq ¤¬Åú¤¨¤¿¤³¤È¤¬¤ï¤«¤ë¡¥
dnsmasq ¤¬´É³í¤¹¤ë¥Û¥¹¥È¾ðÊó¤òÄɲ䷤Ƥߤ褦 †
ÀßÄ꤬¤ä¤äÌÌÅÝ¤Ê BIND ¤È¤Ï°Û¤Ê¤ê¡¤dnsmasq ¤Ç¤Ï dnsmasq ¤¬´É³í¤¹¤ë¥Û¥¹¥È¾ðÊó¤Ï /etc/hosts ¤Ë½ñ¤²Ã¤¨¤ë¤À¤±¤ÇÎɤ¤¡¥
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¸Ä¿Í¸Ä¿Í¤Ç°Û¤Ê¤ë¤è¤¦¤Ë¤¹¤ë¤¿¤á¡¤/etc/hosts ¥Õ¥¡¥¤¥ë¤Ë¡¤
¹àÌÜ | ÀßÄêÃÍ | È÷¹Í |
Äɲ乤ë¥Û¥¹¥È̾(3¤Ä) | sub01-º£¤Î¥Û¥¹¥È̾ ¤«¤é sub03-º£¤Î¥Û¥¹¥È̾ | Î㤨¤Ð¡¤q05.cl.math.sci.osaka-u.ac.jp ¤ò»È¤Ã¤Æ¤¤¤ë¿Í¤Ï¡¤sub01-q05.cl.math.sci.osaka-u.ac.jp, sub02-q05.cl.math.sci.osaka-u.ac.jp, sub03-q05.cl.math.sci.osaka-u.ac.jp ¤Î3¤Ä¡¥ |
¤½¤ì¤é¥Û¥¹¥È¤Î IP | 192.168.125.110+(3*PCÈÖ¹æ) ¤«¤é 192.168.125.112+(3*PCÈÖ¹æ) ¤Î3¤Ä¡¥ | Î㤨¤Ð q05 ¤ò»È¤Ã¤Æ¤¤¤ë¿Í¤Ï¡¤192.168.125.125, 192.168.125.126, 192.168.125.127 ¤È¤Ê¤ë¡¥ |
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192.168.125.125¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡sub01-q05 sub01-q05.cl.math.sci.osaka-u.ac.jp 192.168.125.126¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡sub02-q05 sub02-q05.cl.math.sci.osaka-u.ac.jp 192.168.125.127¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡sub03-q05 sub03-q05.cl.math.sci.osaka-u.ac.jp
¤È¤¤¤¦3¹Ô¤ò½ñ¤¹þ¤à¤³¤È¤Ë¤Ê¤ë(IP ¤È¥Û¥¹¥È̾¤Î´Ö¤Ï¤ª¤½¤é¤¯¥¿¥Ö2¤Ä¤°¤é¤¤¤Ç¶èÀÚ¤ë¤Î¤¬Îɤ¤¤À¤í¤¦)¡¥
¤³¤ÎÀßÄê¤ò¹Ô¤Ã¤¿¤¢¤È¡¤½ñ¤´¹¤¨¤¿ÀßÄê¤òÆɤ߹þ¤Þ¤»¤ë¤¿¤á¤Ë dnsmasq ¤òºÆµ¯Æ°¤·¤Æ¤ª¤³¤¦¡¥¶ñÂÎŪ¤Ë¤Ï¡¤
/usr/local/etc/rc.d/dnsmasq restart
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dig sub02-q05
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ÊÖÅú¤Î ANSWER SECTION ¤ËÀµ¤·¤¤Åú¤¨¤¬Ê֤äƤ¤Æ¤¤¤ì¤Ð¡¤¤¤Á¤ó¤ÈÆ°¤¤¤Æ¤¤¤ë¤³¤È¤¬³Îǧ¤Ç¤¤ë¡¥
Äɲä·¤¿¾ðÊó¤ò¾¥Þ¥·¥ó¤¬(ľÀÜ)Ì䤤¹ç¤ï¤»¤é¤ì¤ë¤«¥Á¥§¥Ã¥¯¤·¤è¤¦ †
¼«Ê¬¤Î /etc/hosts ¤Ë½ñ¤¤¤¿¾ðÊó¤ò¼«Ê¬¤Ç°ú¤±¤ë¤Î¤Ï DNS ¥µ¡¼¥Ð¤È´Ø·¸¤Ê¤¯¤â¤È¤«¤é¤Ç¤¤ë¤³¤È¤À¤«¤é¡¤¤³¤³¤Þ¤Ç¤ÎÆ°ºî¤Ç¤Ï DNS ¥µ¡¼¥Ð dnsmasq ¤òƳÆþ¤·¤¿¤¢¤ê¤¬¤¿¤ß¤¬¤ï¤«¤é¤Ê¤¤¡¥
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dig @q05 sub03-q05
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ÊÖÅú¤Î ANSWER SECTION ¤ËÀµ¤·¤¤Åú¤¨¤¬Ê֤äƤ¤Æ¤¤¤ì¤Ð¡¤q05 ¤¬(ÈÆÍÑ) DNS ¥µ¡¼¥Ð¤È¤·¤Æ»È¤¨¤ë¤³¤È¤È q05 ¤Î¾å¤ÇÀßÄꤷ¤¿ÃͤòÃΤ뤳¤È¤¬¤Ç¤¤ë¤³¤È¤¬¤ï¤«¤ë¡¥
¥ì¥Ý¡¼¥È †
ÅÓÃæ¤Ç¡ÖÄ´¤Ù¤è¡×Åù¤È»Ø¼¨¤µ¤ì¤¿»ö¹à¤Ë¤Ä¤¤¤ÆÄ´ºº¤ò¹Ô¤¤¡¤Êó¹ð¤»¤è.
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- ½ê°(³ØÉô¡¤³Ø²Ê)
- ³ØÀÒÈÖ¹æ
- ³Øǯ
- »á̾
- Æü»þ
- ´Î¿´¤Î¥ì¥Ý¡¼¥ÈÆâÍÆ(ÆÀ¤¿Ãθ«¡¤ºî¶È¤Ë¤Ä¤¤¤Æµ¤¤Å¤¤¤¿¤³¤ÈÅù)
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about Icons, ClipArts †
Some icons in this page are downloadable at ICONFINDER.
The "note" icon designed by Marco Martin is distributed with the LGPL licence,
the "warning" icon designed by Alexandre Moore with the GPL licence
and the "triangle" icon designed by Joseph North is distributed with the Creative Commons (Attribution-Noncommercial-Share Alike 3.0 Unported) licence.
Some clip arts used in this page are downloadable at Open Clip Art Library.
We deeply appreciate their superb works. With licence, they describe that "the actual clipart content on open clipart library is Public domain" in the web.
*1 ¤â¤Á¤í¤ó¡¤¥Í¥Ã¥È¥ï¡¼¥¯¤Î¥ë¡¼¥Æ¥£¥ó¥°¤À¤Î¥Ñ¥±¥Ã¥È¥Õ¥£¥ë¥¿¥ê¥ó¥°¤À¤Î¡¤¤³¤ÎʬÌî¤ÇÃΤäƤ¤¤¿Êý¤¬¤è¤¤¤³¤È¤Ï̵¸Â¤Ë¤¢¤ë¤È¸À¤Ã¤Æ¤â¤è¤¤.
*2 ¤è¤¦¤Ë¸«¤¨¤ë¤È»×¤¦. ¤Þ¤¢¡¤°Ñ¾ù(delegation)¤À¤Î¤Ê¤ó¤À¤Î¤È¸À¤¤½Ð¤¹¤È¸Â¤ê¤Ê¤¯¤ä¤ä¤³¤·¤¯¤Ê¤Ã¤Æ¤¤¤¯¤Î¤À¤¬¡Ä
*3 »î¤·¤Ë¡¤google public DNS ¤ò»È¤Ã¤Æ¤ß¤¿Îã
*4 ¤È¤¤¤¦¤«ºÙ¤«¤¹¤®¤ë
*5 ɬ¤º¤ï¤«¤ë¤È¤Ï¸Â¤é¤Ê¤¤
*6 ¡Ä¤È¤¤¤Ã¤Æ¤â¥Þ¥·¥ó¤¬13Âæ¤È¤¤¤¦¤ï¤±¤Ç¤Ï¤Ê¤¯¡¤³°¤«¤é¤Ï¤½¤¦¸«¤¨¤ë¤è¤¦¤Ë¤Ê¤Ã¤Æ¤¤¤ë¤È¤¤¤¦¤À¤±¤Ç¡¤¼ÂÂ֤Ϥâ¤Ã¤È¿¤¤
źÉÕ¥Õ¥¡¥¤¥ë: domain-structure-multi.png 99·ï [¾ÜºÙ] DNS-model.png 127·ï [¾ÜºÙ] inverse-IPdomain.png 104·ï [¾ÜºÙ] domain-structure.png 105·ï [¾ÜºÙ] dnsmasq-options.png 1100·ï [¾ÜºÙ]