±¿ÍÑ¡¦´ÉÍý   ¢¥Ìá¤ë
  1. ¸ÇÄêIP¥¢¥É¥ì¥¹¤Î³ä¤êÅö¤ÆÊý
  2. ¾ðÊó¼Â¸³µ¡¤Ø¤Î¸ÇÄêIP¥¢¥É¥ì¥¹¤Î³ä¤êÅö¤Æ
  3. gateÅÐÏ¿¥·¥¹¥Æ¥àÍѥǡ¼¥¿¥Ù¡¼¥¹¥«¡¼¥ÉºîÀ®
  4. ÀßÄê¥Õ¥¡¥¤¥ë¤ÎÊݸ
  5. ´ÉÍýÍÑ¥í¥°
  6. ¥ë¡¼¥Æ¥£¥ó¥°¾ðÊó¤Îɽ¼¨

1. ¸ÇÄêIP¥¢¥É¥ì¥¹¤Î³ä¤êÅö¤ÆÊý

¥µ¡¼¥Ð¤Ê¤É¤Ë»ÈÍѤ¹¤ë¥Þ¥·¥ó¤ä¡¢ ¾ðÊó¼Â¸³¡Ê³ØÉô2ǯÌܸå´ü¼ø¶È¡ÖʪÍý¼Â¸³­µ¡×¡Ë¤Ç»ÈÍѤ¹¤ë ¾ðÊó¼Â¸³µ¡¤Ë¤Ï¸ÇÄê¤Î¥×¥é¥¤¥Ù¡¼¥ÈIP¥¢¥É¥ì¥¹¤ò ³ä¤ê¿¶¤ëɬÍפ¬¤¢¤ê¤Þ¤¹¡£

¤Ê¤ª, ¸ÇÄêIP¥¢¥É¥ì¥¹¤ÎÀßÄê¤Ï¶á¤¤¤¦¤Á¤Ë gate-toroku-system ¤Ë´Þ¤Þ¤ì¤ëͽÄê¤Ê¤Î¤Ç, ¼êÆ°¤ÇÀßÄê¤ò¹Ô¤¦¤Î¤Ï¤½¤ì¤Þ¤Ç¤Î»ÃÄêŪ¤ÊÁ¼Ã֤Ǥ¹.

[1.1] ¸ÇÄêIP¥¢¥É¥ì¥¹³ä¤êÅö¤Æ¤Î¶ñÂÎŪ¼ê½ç

¤¢¤ë¥Þ¥·¥ó¤Ë¸ÇÄêIP¥¢¥É¥ì¥¹¤ò³ä¤ê¿¶¤ë¤Ë¤Ï /etc/dhcpd.conf ¤òÊÔ½¸¤¹¤ëɬÍפ¬¤¢¤ê¤Þ¤¹¡£¡Ê²¼µ­»²¾È¡Ë ¤½¤Î¸å DHCP¥Ç¡¼¥â¥ó¤ò ºÆµ¯Æ°¤¹¤ë¤³¤È¤ÇÍ­¸ú¤Ë¤Ê¤ê¤Þ¤¹¡£

Î㤨¤Ð¡¢¡Ö00:90:cc:a2:f4:e8¡×¤È¤¤¤¦ MAC¥¢¥É¥ì¥¹¤ò»ý¤Ä ¡Öhoge¡×¤È¤¤¤¦¥Û¥¹¥È̾¤Î¥Þ¥·¥ó ¤Ë IP¥¢¥É¥ì¥¹¡Ö192.168.0.100¡× ¤ò³ä¤ê¿¶¤ë¤¿¤á¤Ë¤Ï°Ê²¼¤Î¹Ô¤ò /etc/dhcpd.conf ¤Ë½ñ¤­²Ã¤¨¤Þ¤¹¡£

host hoge {
   hardware ethernet 00:90:cc:a2:f4:e8;
   fixed-address 192.168.0.100;
}

½ñ¼°¤Ï

host ¥Û¥¹¥È̾ {
   hardware ethernet £Í£Á£Ã¥¢¥É¥ì¥¹ ;
   fixed-address £É£Ð¥¢¥É¥ì¥¹ ;
}

¤È¤Ê¤Ã¤Æ¤¤¤Þ¤¹¡£¤³¤ì¤Ï PC °ì¤Ä°ì¤Ä¤ò¸Ä¡¹¤ËÀßÄꤹ¤ëɬÍפ¬¤¢¤ê¤Þ¤¹¡£ ¤Þ¤¿¡¢Æ°Åª¥¢¥É¥ì¥¹¤È½Å¤Ê¤é¤Ê¤¤¤è¤¦¤ËIP¥¢¥É¥ì¥¹¤òÀßÄꤷ¤Æ¤¯¤À¤µ¤¤¡£ ¡Ê¡Ö¥Û¥¹¥È̾¡×¤Ë´Ø¤·¤Æ¤Ï¡¢Êص¹¾åʬ¤«¤ê¤ä¤¹¤¤¤â¤Î¤ò¤Ä¤±¤Æ¤¤¤ë¤À¤±¤Ç¡¢ ²¿¤ò½ñ¤­¹þ¤ó¤Ç¤âÆ°ºî¤Ï¤·¤Þ¤¹¡£¡Ë


[1.2] ¸ÇÄꥢ¥É¥ì¥¹¤ò³ä¤êÅö¤Æ¤ë¥Þ¥·¥ó¤Î¾ðÊó

¸ÇÄê¤ÎIP¥¢¥É¥ì¥¹¤ò³ä¤ê¿¶¤ëºÝ¤Ë¤Ï¡¢ ¤½¤Î¥¢¥É¥ì¥¹¤ò»ÈÍѤ¹¤ë¥Þ¥·¥ó¤Î´ÉÍý¼Ô¤Ê¤É¤Î¾ðÊó¤¬ ¤ï¤«¤Ã¤Æ¤¤¤ë¤³¤È¤¬Ë¾¤Þ¤·¤¤¤¿¤á¡¢/etc/dhcpd.conf ¤Ë¤½¤Î¾ðÊó¤ò½ñ¤­²Ã¤¨¤Þ¤¹¡£

¤³¤ì¤Ï¼êÆ°¤ÇÀßÄê¤ò¹Ô¤¦¤È¤­¤ËÊØÍø¤Ê¤è¤¦¤Ë½ñ¤¯¤â¤Î¤Ç, gate-toroku-system ¤¬µ¡Ç½¤·»Ï¤á¤¿Ãʳ¬¤ÇɬÍפʤ¯¤Ê¤ê¤Þ¤¹.

½ñ¤¤¤Æ¤ª¤¯¤Ù¤­¾ðÊó¤Ï°Ê²¼¤Î5¤Ä¤Ç¤¹¡£

¡¦root
¥Þ¥·¥ó¤Î½êÍ­¼Ô¤Î¥¢¥«¥¦¥ó¥È [µÚ¤Ó¼Â̾]
¡¦place
ÀßÃÖ¾ì½ê
¡¦note
ÍÑÅӤʤÉ
¡¦accepted
¥¢¥É¥ì¥¹¤Î³ä¤êÅö¤Æ¤¬Í­¸ú¤Ë¤Ê¤Ã¤¿Æü»þ
¡¦hostname
¥Þ¥·¥ó¤Î¥Û¥¹¥È̾

½ñ¼°¤Ï°Ê²¼¤Î¤è¤¦¤Ë¤·¤Þ¤¹¡£¥³¥á¥ó¥Èʸ¤Ê¤Î¤ÇʸƬ¤Ë¡Ö#¡× ¤ò¤Ä¤±¤Þ¤¹¡£ ¡Ê¤â¤Ã¤È¤¹¤Ã¤­¤ê¤¹¤ë½ñ¤­Êý¤¬¤¢¤ì¤Ð¡¢ÊѤ¨¤Æ¤¯¤À¤µ¤¤¡Ë

# root: ¥¢¥«¥¦¥ó¥È̾ [¼Â̾],   place: ÀßÃÖ¾ì½ê
# note: ÍÑÅӤʤÉ
# accepted: ÀßÄêÆü»þ,      hostname: ¥Û¥¹¥È̾

Î㤨¤Ð¡¢¾åµ­¤Îhoge¤È¤¤¤¦¥Þ¥·¥ó¤Ë¥¢¥É¥ì¥¹¤ò³ä¤êÅö¤Æ¤ëºÝ¤Ë¤Ï ÀßÄê¤ÎÉôʬ¤Î¾å¤Ë¤³¤Î¾ðÊó¤ò½ñ¤­²Ã¤¨¤Æ¤¯¤À¤µ¤¤¡£ ¤Þ¤È¤á¤ë¤È°Ê²¼¤Î¤è¤¦¤Ë¤Ê¤ê¤Þ¤¹¡£ ¡Ê¥¢¥«¥¦¥ó¥È̾¤Ê¤É¤ÏÁ´¤Æ²Í¶õ¤Î¤â¤Î¤Ç¤¹¡Ë

# root: taro [ËÌÂç ÂÀϺ],   place: 7-103
# note: ¤Ê¤Ë¤«¤Î¸¦µæ
# accepted: 2001-10-09,    hostname: hoge

host hoge {
   hardware ethernet 00:90:cc:a2:f4:e8;
   fixed-address 192.168.0.100;
}

2. ¾ðÊó¼Â¸³µ¡¤Ø¤Î¸ÇÄêIP¥¢¥É¥ì¥¹¤Î³ä¤êÅö¤Æ

¾ðÊó¼Â¸³¤Ç»ÈÍѤ¹¤ë¾ðÊó¼Â¸³µ¡¤Ë¤Ï¸ÇÄê¤Î¥×¥é¥¤¥Ù¡¼¥ÈIP¥¢¥É¥ì¥¹ ¤ò³ä¤êÅö¤Æ¤Þ¤¹¡£¡Ê¥°¥í¡¼¥Ð¥ë¥¢¥É¥ì¥¹¤ò»ý¤Ä3nµ¡¤ÏÊÌ¡Ë

[2.1] ³ä¤êÅö¤Æ¤ë¤Ù¤­IP¥¢¥É¥ì¥¹

³ä¤êÅö¤Æ¤ë¥¢¥É¥ì¥¹¤Ï 192.168.0.(100+¾ðÊó¼Â¸³µ¡¤Î¥Ê¥ó¥Ð¡¼) ¤Ç¤¹¡£¤è¤Ã¤Æ

joho01    192.168.0.101
joho02    192.168.0.102
joho04    192.168.0.104
joho05    192.168.0.105
  ¡¦
  ¡¦
  ¡¦
joho20    192.168.0.120
joho22    192.168.0.122
joho23    192.168.0.123

¤È¤Ê¤ê¤Þ¤¹¡£¶ñÂÎŪ¤Ê³ä¤êÅö¤ÆÊý¤Ï ¾åµ­ ¤ò»²¹Í¤Ë¤·¤Æ²¼¤µ¤¤¡£

¢¨¾ðÊó¼Â¸³µ¡¤Ë´Ø¤·¤Æ¤Ï¡¢´ÉÍý¼Ô̾¤Ê¤É¤ò½ñ¤­¹þ¤àɬÍפϤ¢¤ê¤Þ¤»¤ó¡£


[2.2] /etc/hosts ¤Ø¤ÎÄɲýñ¤­¹þ¤ß

¸ÇÄêIP¤ò³ä¤êÅö¤Æ¤¿¤Î¤Ç¡¢ ¥Û¥¹¥È̾¤ÈIP¥¢¥É¥ì¥¹¤òÂбþÉÕ¤±¤ë¤³¤È¤¬²Äǽ¤Ë¤Ê¤ê¤Þ¤·¤¿¡£ °Ê²¼¤Î¤â¤Î¤ò /etc/hosts ¤Ø½ñ¤­²Ã¤¨¤Æ¤¯¤À¤µ¤¤¡£ ¤³¤ì¤Ï¡¢blue¤¬¾ðÊó¼Â¸³µ¡¤ÈÄÌ¿®¤¹¤ë¤È¤­¤Ë¥Û¥¹¥È̾¤Ç¤Ç¤­¤ë¤è¤¦¤Ë¤¹¤ë¤¿¤á¤Ç¤¹¡£

192.168.0.101   joho01.ep.sci.hokudai.ac.jp     joho01
192.168.0.102   joho02.ep.sci.hokudai.ac.jp     joho02
192.168.0.104   joho04.ep.sci.hokudai.ac.jp     joho04
192.168.0.105   joho05.ep.sci.hokudai.ac.jp     joho05
192.168.0.107   joho07.ep.sci.hokudai.ac.jp     joho07
192.168.0.108   joho08.ep.sci.hokudai.ac.jp     joho08
192.168.0.110   joho10.ep.sci.hokudai.ac.jp     joho10
192.168.0.111   joho11.ep.sci.hokudai.ac.jp     joho11
192.168.0.113   joho13.ep.sci.hokudai.ac.jp     joho13
192.168.0.114   joho14.ep.sci.hokudai.ac.jp     joho14
192.168.0.116   joho16.ep.sci.hokudai.ac.jp     joho16
192.168.0.117   joho17.ep.sci.hokudai.ac.jp     joho17
192.168.0.119   joho19.ep.sci.hokudai.ac.jp     joho19
192.168.0.120   joho20.ep.sci.hokudai.ac.jp     joho20
192.168.0.122   joho22.ep.sci.hokudai.ac.jp     joho22
192.168.0.123   joho23.ep.sci.hokudai.ac.jp     joho23

3. gateÅÐÏ¿¥·¥¹¥Æ¥àÍѥǡ¼¥¿¥Ù¡¼¥¹¥«¡¼¥ÉºîÀ®

¸ÇÄê¥×¥é¥¤¥Ù¡¼¥ÈIP¥¢¥É¥ì¥¹¤ÎÀßÄê¤Ï¶á¤¤¤¦¤Á¤Ë gate-toroku-system ¤Ç´ÉÍý¤¹¤ë¤è¤¦¤Ë¤Ê¤ë¤¿¤á, ¤½¤ì¤ËÂбþ¤Ç¤­¤ë¤è¤¦¤Ë ¸ÇÄê¥×¥é¥¤¥Ù¡¼¥È¥¢¥É¥ì¥¹¤ÇÀܳ¤ò¹Ô¤Ã¤Æ¤¤¤ë¥Þ¥·¥ó¤Ë¤Ä¤¤¤Æ ¤½¤ì¤¾¤ì, gate-toroku-system ¤Ç»ÈÍѤ·¤Æ¤¤¤ë IP¥¢¥É¥ì¥¹¥Ç¡¼¥¿¥Ù¡¼¥¹¥«¡¼¥É¤ÈƱÍͤΤâ¤Î¤òºîÀ®¤·¤Æ¤ª¤­¤Þ¤¹.

¤Ê¤ª, ¤³¤Îºî¶È¤Ïgate-toroku-system¤¬µ¡Ç½¤¹¤ë¤Þ¤Ç¤Î °ì»þŪ¤Ê´ü´Ö¤Î¤ß¹Ô¤¦¤â¤Î¤Ç¤¹.

[3.1] IP¥¢¥É¥ì¥¹¥Ç¡¼¥¿¥Ù¡¼¥¹¥«¡¼¥É¤Î½ñ¼°

gate-toroku-system ¤Ç»ÈÍѤ·¤Æ¤¤¤ëIP¥¢¥É¥ì¥¹¥Ç¡¼¥¿¥Ù¡¼¥¹¥«¡¼¥É¤ÎÆâÍÆ¤Ï °Ê²¼¤Î¤è¤¦¤Ë¤Ê¤Ã¤Æ¤¤¤Þ¤¹. (¤Ê¤ª, ²¼¤ÎÎã¤Ï¤Ç¤¿¤é¤á¤Ê¥Ñ¥é¥á¡¼¥¿¤ò½ñ¤¤¤Æ¤¢¤ê¤Þ¤¹.)

eth: 00:90:CC:A2:F0:A6
phase: result
type: A
root: hoge
hubport: AE002.3
cname:
place: 3-103
mx:
note: ¾ðÊó¼Â¸³ÍÑ
ip: 133.87.45.??
accepted: by nobody using gate-ip-apply on 2000-04-14T12:13:20+0000
owner: foo
hardware: PC98
date: 2001-11-30T12:28:32+0000
hostname: joho3

¾å¤ÎÎã¤ÇÀÖ»ú¤Ç½ñ¤¤¤Æ¤¢¤ëÉôʬ¤¬ ¸ÇÄê¥×¥é¥¤¥Ù¡¼¥ÈIP¥¢¥É¥ì¥¹»ÈÍѤκݤËÀßÄꤷ¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤ (¤Ä¤Þ¤ê, ¥æ¡¼¥¶¤Ë¿½ÀÁ¤·¤Æ¤â¤é¤ï¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤)¹àÌܤǤ¹.

¤Þ¤¿, ÀÄ»ú¤Ç½ñ¤¤¤Æ¤¢¤ëÉôʬ¤Ï DHCP¥µ¡¼¥Ð¤Î´ÉÍý¼Ô¤¬¤³¤Î¥«¡¼¥É¤òºîÀ®¤¹¤ëºÝ¤Ë, ¤½¤Î»þ¤Î»þ´Ö¤Ë¤è¤Ã¤ÆÊѹ¹¤·¤Ê¤±¤ì¤Ð¤Ê¤é¤Ê¤¤¹àÌܤǤ¹.


[3.2] ¥Ç¡¼¥¿¥Ù¡¼¥¹¥«¡¼¥ÉºîÀ®¼ê½ç

¼ÂºÝ¤Ë¸ÇÄê¥×¥é¥¤¥Ù¡¼¥ÈIP¥¢¥É¥ì¥¹¤Î³ä¤êÅö¤Æ¤ò ¹Ô¤¦ºÝ¤Î¼ê½ç¤Ç¤¹.

[3.2.1] ¿½ÀÁ¤Î¼õ¤±ÉÕ¤±

IP¥¢¥É¥ì¥¹¤Î¿·µ¬¼èÆÀ¡¦Êѹ¹¡¦ÇÑ»ß ¤Ë½¾¤Ã¤Æ¸ÇÄê¥×¥é¥¤¥Ù¡¼¥ÈIP¥¢¥É¥ì¥¹¤ÎÅÐÏ¿¿½ÀÁ¤ò¹Ô¤Ã¤Æ¤â¤é¤¤¤Þ¤¹. ¿½ÀÁ¤ÎºÝ¤ËÍøÍѼԤϥǡ¼¥¿¥Ù¡¼¥¹¥«¡¼¥É¤ËɬÍפʾðÊó¤ò ½ñ¤­¹þ¤à¤³¤È¤Ë¤Ê¤Ã¤Æ¤¤¤ë¤Î¤Ç, ¤³¤Î¿½ÀÁ¤ò¼õ¤±¤¿»þÅÀ¤Ç¥Ç¡¼¥¿¥Ù¡¼¥¹¥«¡¼¥ÉºîÀ®¤ËɬÍפʾðÊó¤Ï¼ê¤ËÆþ¤ê¤Þ¤¹. ([3.1]¤ÎÎã¤ÎÀÖ»ú¤ÎÉôʬ¤Ç¤¹)

[3.2.2] ¥Ç¡¼¥¿¥Ù¡¼¥¹¥«¡¼¥ÉºîÀ®

¿½ÀÁ¤ÎºÝ¤ËÆþ¼ê¤·¤¿¾ðÊ󤫤é¥Ç¡¼¥¿¥Ù¡¼¥¹¤òºîÀ®¤·¤Þ¤¹. (´û¤Ë, À칶¥Í¥Ã¥È¥ï¡¼¥¯°Ñ°÷²ñ¤¬¾µÇ§¤·¤Æ¤¤¤ë¾ì¹ç¤ò¹Í¤¨¤Æ¤¤¤Þ¤¹)

  1. ´û¸¤ÎIP¥¢¥É¥ì¥¹¥Ç¡¼¥¿¥Ù¡¼¥¹¥«¡¼¥É¤ò¥³¥Ô¡¼¤·, ¿÷·¿¤Ë¤·¤Þ¤¹. (¤Á¤Ê¤ß¤Ë gate-toroku-system ¤ÎIP¥¢¥É¥ì¥¹¥Ç¡¼¥¿¥Ù¡¼¥¹¥«¡¼¥ÉÃÖ¤­¾ì¤Ï /home/gate/ipdb/ °Ê²¼)
  2. ¤½¤Î¥«¡¼¥É¤Î¥Õ¥¡¥¤¥ë̾¤ò¡Ö¥Û¥¹¥È̾¡×¤ÈƱ¤¸¤â¤Î¤Ë¤·¤Æ¤¯¤À¤µ¤¤. (gate-toroku-system ¤Ç¤ÏIP¥Ç¡¼¥¿¥Ù¡¼¥¹¥«¡¼¥É¤Î̾Á°¤Ï¤½¤³¤Ë ½ñ¤­¹þ¤Þ¤ì¤Æ¤¤¤ë¥Û¥¹¥È̾¤ÈƱ¤¸)
  3. ¾åµ­([3.1])¤ÎÎã¤ÎÀÖ»ú¤ÎÉôʬ¤ò, ¿½ÀÁ¤µ¤ì¤¿¾ðÊó ¤ò¸µ¤Ë½ñ¤­¹þ¤ó¤Ç¤¤¤­¤Þ¤¹.
  4. ºîÀ®»þ¹ï¤«¤éÀÄ»ú¤ÎÉôʬ¤òÊѹ¹¤·¤Þ¤¹.

°Ê¾å¤Ç¥Ç¡¼¥¿¥Ù¡¼¥¹¥«¡¼¥É¤¬´°À®¤·¤Þ¤·¤¿.

[3.2.3] ¥Ç¡¼¥¿¥Ù¡¼¥¹¥«¡¼¥É¤ÎÊÝ´É

°Ê¾å¤ÇºîÀ®¤·¤¿¥«¡¼¥É¤òÊݴɤ·¤Æ¤ª¤­¤Þ¤¹. ËÜÍè, gate-toroku-system ¤Ç¤ÏIP¥¢¥É¥ì¥¹¥Ç¡¼¥¿¥Ù¡¼¥¹¤Ï /home/gate/ipdb/ °Ê²¼¤ËÊݸ¤µ¤ì¤Æ¤¤¤Þ¤¹¤¬, ¸½ºß(2001/12/22)¤Ç¤Ï¤Þ¤À¤³¤Îµ¡Ç½¤¬ gate-toroku-system ¤Ë´Þ¤Þ¤ì¤Æ¤¤¤Ê¤¤¤¿¤á, gate-toroku-system ¤È¤Ï̵´Ø·¸¤Ê¤È¤³¤í¤Ë°ì»þÊݴɤ·¤Æ¤ª¤¯É¬Íפ¬¤¢¤ê¤Þ¤¹.

º£¤Î¤È¤³¤í¤Ï, /etc/dhcpipdb ¤È¤¤¤¦¥Ç¥£¥ì¥¯¥È¥ê¤òºîÀ®¤·, ¤½¤ÎÃæ¤Ë¥Ç¡¼¥¿¥Ù¡¼¥¹¥«¡¼¥É¤òÊݴɤ·¤Æ¤ª¤¯¤³¤È¤Ë¤·¤Þ¤¹.

¤¤¤º¤ì gate-toroku-system ¤ËDHCP¥µ¡¼¥Ð¤ò´ÉÍý¤¹¤ëµ¡Ç½¤¬´Þ¤Þ¤ì¤¿¾ì¹ç¤Ë¤Ï ¤³¤Î¥Ç¡¼¥¿¥Ù¡¼¥¹¥«¡¼¥É¤ò /home/gate/ipdb/ °Ê²¼¤Î ¥Ç¡¼¥¿¥Ù¡¼¥¹¤Ë¹çή¤µ¤»¤Þ¤¹.


4. ÀßÄê¥Õ¥¡¥¤¥ë¤ÎÊݸ

Ëü¤¬°ì¥µ¡¼¥Ð¤¬¥¯¥é¥Ã¥·¥å¤·¤¿¾ì¹ç¤ä ¾¤ÎPC¤Ë¤ªÌòÌܤò¾ù¤ë¾ì¹ç¤Ë ¤½¤Î¥µ¡¼¥ÐÆÃÍ­¤ÎÀßÄêÃͤò»ý¤ÄÀßÄê¥Õ¥¡¥¤¥ë¤òÊݸ¤·¤Æ¤ª¤¯¤È ¼ê´Ö¤¬¾Ê¤±¤Þ¤¹¡£

[4.1] /etc/dhcpd.conf ¤ÎÊݸ

ưŪ³ä¤êÅö¤Æ¤ÎÀßÄê¤Ï¤È¤â¤«¤¯¡¢¼êÆ°³ä¤êÅö¤Æ¤Î¤¿¤á¤Î MAC¥¢¥É¥ì¥¹¤ÈIP¥¢¥É¥ì¥¹¤È¤ÎÂбþɽ¤¬Âç»ö¤Ê¤Î¤Ç ¡Ê¸Å¤¤Âбþɽ¤Ï°ÕÌ£¤¬Ìµ¤¤¤Î¤Ç¡Ë Êݸ¤·¤Æ¤ª¤¤¤¿Êý¤¬°ÂÁ´¤Ç¤¹¡£

¼«Ê¬¤Î¥Û¡¼¥à¥Ç¥£¥ì¥¯¥È¥ê¤Ê¤É¤Ë¥³¥Ô¡¼¤·¤Æ¤ª¤¯¤ÈÎɤ¤¤Ç¤·¤ç¤¦¡£


5. ´ÉÍýÍÑ¥í¥°

[5.1] DHCP»ÈÍÑ´Æ»ë¥í¥°

[5.1.1] DHCP¤ò¡Ö郎¡×¡Ö¤¤¤Ä¡×»ÈÍѤ·¤Æ¤¤¤ë¤Î¤«¤ò³Îǧ¤¹¤ë¡£

DHCP¥µ¡¼¥Ð¤ò´ÉÍý¤¹¤ë¾å¤Ç¡¢¡Ö郎¡×¡Ö¤¤¤Ä¡×DHCP¥µ¡¼¥Ð¤ò»ÈÍѤ·¤¿¤Î¤«¤¬ ¤ï¤«¤ì¤Ð²¿¤«¤¢¤Ã¤¿¤È¤­¤Ë¸¶°ø¤òÄɵᤷ¤ä¤¹¤¯¤Ê¤ê¤Þ¤¹¡£ Debian¤Ç¤Ï /var/log/syslog ¤Ê¤É¤Î ¥Õ¥¡¥¤¥ë¤Ë¡¢¥¯¥é¥¤¥¢¥ó¥È¤«¤é¤ÎÍ×µá¤ä¥µ¡¼¥Ð¤«¤é¤Î±þÅú ¤¬µ­Ï¿¤µ¤ì¤Æ¤¤¤Þ¤¹¡£

[5.1.2] ´ÉÍý¥í¥°

¶ñÂÎŪ¤Ëµ­Ï¿¤µ¤ì¤Æ¤¤¤ë¥Õ¥¡¥¤¥ë¤Ï

¤Î6¤Ä¤Î¥Õ¥¡¥¤¥ë¤Ç¤¹¡£°ì¤Ä¤Î¥Õ¥¡¥¤¥ë¤Ë1Æüʬ¤Î¥í¥°¤¬Î¯¤Þ¤ê¡¢ ¹ç·×1½µ´Öʬ¤Î¥í¥°¤¬Î¯¤Þ¤ê¤Þ¤¹¡£ ¾ï¤Ë¹¹¿·¤µ¤ì¤Ä¤Å¤±¡¢ºÇ¿·¤Î¤â¤Î¤Ï /var/log/syslog ¤Ëµ­Ï¿¤µ¤ì¤Þ¤¹¡£

²¼6¤Ä¤Î¥Õ¥¡¥¤¥ë¤Ïgzip·Á¼°¤Ç°µ½Ì¤µ¤ì¤Æ¤¤¤Þ¤¹¤¬¡¢ ¡Özcat¡×¤ä¡Özless¡× ¤ò»ÈÍѤ¹¤ì¤ÐÃæ¿È¤ò¸«¤ë¤³¤È¤¬¤Ç¤­¤Þ¤¹¡£ ¡Ê¥Ñ¡¼¥ß¥Ã¥·¥ç¥ó¤ÎÀßÄê¤Ë¤è¤ê¥ë¡¼¥È¸¢¸Â¤¬Ìµ¤¤¤È¸«¤ë¤³¤È¤¬¤Ç¤­¤Þ¤»¤ó¤¬¡Ë

[5.1.3] ´ÉÍý¥í¥°¤ÎÃæ¿È

°Ê²¼¤Ï´ÉÍý¥í¥°¤ÎÃæ¿È¤Î°ìÉô¤ÎDHCP¤Ë´Ø·¸¤·¤¿Éôʬ¤À¤±¤ò È´¿è¤·¤¿¤â¤Î¤Ç¤¹¡£¡ÊÃæ¿È¤Ï¾¯¡¹½ñ¤­´¹¤¨¤Æ¤¢¤ê¤Þ¤¹¡£¡Ë

$ sudo zcat /var/log/syslog.1.gz [Enter]
....
Jun 29 20:18:47 blue dhcpd-2.2.x: DHCPDISCOVER from 00:90:cc:a2:f4:e8 via eth1
Jun 29 20:18:47 blue dhcpd-2.2.x: DHCPOFFER on 192.168.0.113 to 00:90:cc:a2:f4:e8 via eth1
Jun 29 20:18:47 blue dhcpd-2.2.x: DHCPREQUEST for 192.168.0.113 from 00:90:cc:a2:f4:e8 via eth1
Jun 29 20:18:47 blue dhcpd-2.2.x: DHCPACK on 192.168.0.113 to 00:90:cc:a2:f4:e8 via eth1
Jun 29 20:39:27 blue -- MARK --
Jun 29 20:56:03 blue dhcpd-2.2.x: DHCPREQUEST for 192.168.0.149 from 00:90:cc:a2:a4:cb via eth1
Jun 29 20:56:03 blue dhcpd-2.2.x: DHCPACK on 192.168.0.149 to 00:90:cc:a2:a4:cb via eth1
Jun 29 21:08:47 blue dhcpd-2.2.x: DHCPREQUEST for 192.168.0.113 from 00:90:cc:a2:f4:e8 via eth1
Jun 29 21:08:47 blue dhcpd-2.2.x: DHCPACK on 192.168.0.113 to 00:90:cc:a2:f4:e8 via eth1
Jun 29 21:08:55 blue -- MARK --
Jun 29 21:14:19 blue dhcpd-2.2.x: DHCPREQUEST for 192.168.0.149 from 00:90:cc:a2:a4:cb via eth1
Jun 29 21:14:19 blue dhcpd-2.2.x: DHCPACK on 192.168.0.149 to 00:90:cc:a2:a4:cb via eth1
Jun 29 21:23:03 blue dhcpd-2.2.x: DHCPDISCOVER from 00:90:cc:a2:f4:e8 via eth1
Jun 29 21:23:03 blue dhcpd-2.2.x: DHCPOFFER on 192.168.0.113 to 00:90:cc:a2:f4:e8 via eth1
Jun 29 21:23:03 blue dhcpd-2.2.x: DHCPREQUEST for 192.168.0.113 from 00:90:cc:a2:f4:e8 via eth1
Jun 29 21:23:03 blue dhcpd-2.2.x: DHCPACK on 192.168.0.113 to 00:90:cc:a2:f4:e8 via eth1
Jun 29 21:26:52 blue dhcpd-2.2.x: DHCPREQUEST for 192.168.0.149 from 00:90:cc:a2:a4:cb via eth1
Jun 29 21:26:52 blue dhcpd-2.2.x: DHCPACK on 192.168.0.149 to 00:90:cc:a2:a4:cb via eth1
Jun 29 21:29:21 blue -- MARK --
Jun 29 21:33:35 blue -- MARK --
Jun 29 21:34:48 blue dhcpd-2.2.x: DHCPREQUEST for 192.168.0.149 from 00:90:cc:a2:a4:cb via eth1
Jun 29 21:34:48 blue dhcpd-2.2.x: DHCPACK on 192.168.0.149 to 00:90:cc:a2:a4:cb via eth1
Jun 29 21:59:27 blue -- MARK --
....

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¡Ö¥Ñ¥±¥Ã¥È¤ÎÆâÍơפ˴ؤ·¤Æ¤Ï epnetfan 2001ǯÅÙ ºÂ³ØÊÔ ¡ÖDHCP¤È¤Ï¡©¡× ¤ËÀâÌÀ¤¬ºÜ¤Ã¤Æ¤¤¤Þ¤¹¡£

¢¨flash¥³¥ó¥Æ¥ó¥Ä¤Ê¤Î¤Ç¡¢ÍÆÎ̤¬Â礭¤¯¥À¥¦¥ó¥í¡¼¥É¤Ë»þ´Ö¤¬¤«¤«¤ë¤«¤â¤·¤ì¤Þ¤»¤ó¡£ ¤Þ¤¿¡¢¥Ö¥é¥¦¥¶¤Ë¤è¤Ã¤Æ¤Ï¸«¤ë¤³¤È¤¬¤Ç¤­¤Ê¤¤¡¢¤Ê¤É¤Î²ÄǽÀ­¤¬¤¢¤ê¤Þ¤¹¡£ ¸æλ¾µ¤¯¤À¤µ¤¤¡£

[5.1.4] ¾¯¡¹ÊØÍø¤Ê(?)´ÉÍý¥í¥°¤Î³Îǧˡ

Àè¤Û¤É¤Î¥í¥°¤ÎÃæ¿È¤ËÁ´¤ÆÌܤòÄ̤¹¤Î¤ÏÂçÊѤʤΤǡÖgrep¡× ¥³¥Þ¥ó¥É¤ò»ÈÍѤ·¤ÆɬÍפÊÉôʬ¤À¤±¤ò¼è¤ê½Ð¤¹¤È³Îǧ¤¬³Ú¤Ç¤¹¡£ Î㤨¤Ð¡¢°Ê²¼¤ÎÊýË¡¤Ï¤É¤¦¤Ç¤·¤ç¤¦?

$ sudo zcat /var/log/syslog.1.gz | grep DHCPACK | less [Enter]
....
Jun 29 20:18:47 blue dhcpd-2.2.x: DHCPACK on 192.168.0.113 to 00:90:cc:a2:f4:e8 via eth1
Jun 29 20:56:03 blue dhcpd-2.2.x: DHCPACK on 192.168.0.149 to 00:90:cc:a2:a4:cb via eth1
Jun 29 21:08:47 blue dhcpd-2.2.x: DHCPACK on 192.168.0.113 to 00:90:cc:a2:f4:e8 via eth1
Jun 29 21:14:19 blue dhcpd-2.2.x: DHCPACK on 192.168.0.149 to 00:90:cc:a2:a4:cb via eth1
Jun 29 21:23:03 blue dhcpd-2.2.x: DHCPACK on 192.168.0.113 to 00:90:cc:a2:f4:e8 via eth1
Jun 29 21:26:52 blue dhcpd-2.2.x: DHCPACK on 192.168.0.149 to 00:90:cc:a2:a4:cb via eth1
Jun 29 21:34:48 blue dhcpd-2.2.x: DHCPACK on 192.168.0.149 to 00:90:cc:a2:a4:cb via eth1
....

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[5.2] ưŪIP¥¢¥É¥ì¥¹³ä¤êÅö¤Æµ­Ï¿¥í¥°

[5.2.1] ¡ÖưŪIP¥¢¥É¥ì¥¹¡×¤ò¤É¤Î¤è¤¦¤Ë³ä¤ê¿¶¤Ã¤Æ¤¤¤ë¤Î¤«Ä´¤Ù¤ë¡£

DHCP¥µ¡¼¥Ð¤Ç¤Ï¡ÖIP¥¢¥É¥ì¥¹¤ÎưŪ³ä¤êÅö¤Æ¡×¤ò¹Ô¤¤¤Þ¤¹¤¬¡¢ ¡Öï¤Ë¡Ê¤É¤Î¥Û¥¹¥È¤Ë¡Ë¡×¡¢¡Ö¤É¤ÎIP¥¢¥É¥ì¥¹¤ò¡×¡¢¡Ö¤¤¤Ä¤«¤é¤¤¤Ä¤Þ¤Ç¡×³ä¤êÅö¤Æ¤¿¤Î¤« ¤òµ­Ï¿¤·¤Æ¤¤¤ë¥í¥°¤¬¤¢¤ê¤Þ¤¹¡£

[5.2.2] ´ÉÍý¥í¥°

¶ñÂÎŪ¤Ëµ­Ï¿¤µ¤ì¤Æ¤¤¤ë¥Õ¥¡¥¤¥ë¤Ï°Ê²¼¤Î¤â¤Î¤Ç¤¹¡£

[5.2.3] ´ÉÍý¥í¥°¤ÎÃæ¿È

°Ê²¼¤Ï´ÉÍý¥í¥°¤ÎÃæ¿È¤Î°ìÉô¤Ç¤¹¡£¡ÊÃæ¿È¤Ï¾¯¡¹½ñ¤­´¹¤¨¤Æ¤¢¤ê¤Þ¤¹¡Ë

$ sudo cat /var/dhcp/dhcp.leases [Enter]
....
lease 192.168.0.132 {
        starts 5 2001/05/25 12:56:40;
        ends 6 2001/05/26 00:56:40;
        hardware ethernet 00:90:cc:a2:f9:36;
        client-hostname "joho24";
}
lease 192.168.0.135 {
        starts 5 2001/05/25 16:22:56;
        ends 5 2001/05/25 18:02:56;
        hardware ethernet 00:90:27:18:ef:89;
        uid 01:00:90:27:18:ef:89;
        client-hostname "hirame";
}
lease 192.168.0.133 {
        starts 5 2001/05/25 15:21:50;
        ends 5 2001/05/25 17:01:50;
        hardware ethernet 00:90:cc:a2:f9:41;
        uid 01:00:90:cc:a2:f9:41;
        client-hostname "JOHO05";
}
lease 192.168.0.130 {
        starts 5 2001/05/25 15:45:43;
        ends 5 2001/05/25 16:26:52;
        hardware ethernet 00:90:cc:a2:f4:e8;
        uid 01:00:90:cc:a2:f4:e8;
}
....

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Í׵ᤷ¤¿¥¯¥é¥¤¥¢¥ó¥È¤Î¥Ñ¥½¥³¥ó¤Ë¤Á¤ã¤ó¤È¥Û¥¹¥È̾¤¬ÀßÄꤵ¤ì¤Æ¤¤¤ë¾ì¹ç¤Ë¤Ï ¥Û¥¹¥È̾¤¬É½¼¨¤µ¤ì¡¢¤µ¤ì¤Æ¤¤¤Ê¤¤¾ì¹ç¤Ë¤Ïɽ¼¨¤µ¤ì¤Þ¤»¤ó¡£



6. ¥ë¡¼¥Æ¥£¥ó¥°¾ðÊó¤Îɽ¼¨

[6.1] netstat ¥³¥Þ¥ó¥É

¥Í¥Ã¥È¥ï¡¼¥¯¤ÎÀܳ¾õ¶·¤ä¥ë¡¼¥Æ¥£¥ó¥°¥Æ¡¼¥Ö¥ë¤òÄ´¤Ù¤ë¤¿¤á¤Ë ¡Önetstat¡×¤È¤¤¤¦¥³¥Þ¥ó¥É¤¬¤¢¤ê¤Þ¤¹¡£ ¤³¤Î¥³¥Þ¥ó¥É¤ÇIP¥Þ¥¹¥«¥ì¡¼¥É¤ÇÀܳ¤·¤Æ¤¤¤ë¥Þ¥·¥ó¤Î ¥ë¡¼¥Æ¥£¥ó¥°¾ðÊó¤âÆÀ¤ë¤³¤È¤¬¤Ç¤­¤Þ¤¹¡£

IP¥Þ¥¹¥«¥ì¡¼¥ÉÀܳ¤Î¥Þ¥·¥ó¤ÎÀܳ¾õ¶·¤ò¸«¤ë¤¿¤á¤Ë¤Ï°Ê²¼¤Î¥³¥Þ¥ó¥É¤òÆþÎϤ·¤Þ¤¹¡£

$ netstat -Mn [Enter]
IP masquerading entries
prot   expire source               destination          ports
udp   2:36.23 192.168.0.134        133.87.45.70         1024 -> 53 (65072)
udp   4:38.11 192.168.0.120        133.87.45.70         1024 -> 53 (65083)
tcp  14:59.97 192.168.0.134        133.87.45.72         888 -> 22 (65073)
tcp  14:12.69 192.168.0.130        133.87.45.72         1136 -> 22 (64810)
tcp   0:55.22 192.168.0.120        133.87.45.72         1165 -> 80 (65084)
tcp   0:55.22 192.168.0.120        133.87.45.72         1166 -> 80 (65086)
tcp   0:42.22 192.168.0.123        133.87.45.72         1037 -> 80 (65081)
tcp   0:42.22 192.168.0.123        133.87.45.72         1036 -> 80 (65079)
....

³Æ¹àÌÜ É½¼¨¤µ¤ì¤Æ¤¤¤ë¤â¤Î¤Î°ÕÌ£ -n ¥ª¥×¥·¥ç¥ó¤ò¤Ä¤±¤Ê¤«¤Ã¤¿¾ì¹ç
prot »ÈÍѤµ¤ì¤Æ¤¤¤ë¥×¥í¥È¥³¥ë
expire ÄÌ¿®¤¬ÀÚÃǤµ¤ì¤ë¤Þ¤Ç¤Î»Ä¤ê»þ´Ö
source ȯ¿®¸µ¤ÎIP¥¢¥É¥ì¥¹ ȯ¿®¸µ¤Î¥Û¥¹¥È¥Í¡¼¥à(ÀßÄꤵ¤ì¤Æ¤¤¤Ê¤¤¾ì¹ç¤ÏIP¥¢¥É¥ì¥¹)
destination Á÷¿®Àè¤ÎIP¥¢¥É¥ì¥¹ Á÷¿®Àè¤Î¥É¥á¥¤¥ó¥Í¡¼¥à
ports ¥Ý¡¼¥ÈÈÖ¹æ ¥µ¡¼¥Ó¥¹Ì¾

¢¥Ìá¤ë     ºÇ½ª¹¹¿·Æü¡§2001/12/22(¿¹ÀîÌ÷Âç)