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ÀÛ¼ºÀÚ : ÁÁÀºÁøÈ£(truefeel, http://coffeenix.net/ ) ÀÛ¼ºÀÏ : 2003.2 Á¤¸®ÀÏ : 2003.9.21(ÀÏ) ³»ºÎ ³×Æ®¿÷ÀÇ ¼¹ö¿Í PC, ³×Æ®¿öÅ© ÀåºñÀÇ ¸ðµç ·£Ä«µå ¹°¸®ÁÖ¼Ò(MAC Address)¸¦ ¾Ë¾Æ³»´Â ¹æ¹ýÀº ¹¹°¡ ÀÖÀ»±î? °¡Àå ¾È ÁÁÀº ¹æ¹ýÀº °¢ PC ÄÉÀ̽º¸¦ ¿¾î ·£Ä«µå¿¡ ½áÁø °ÍÀ» º¸°í È®ÀÎÇÏ´Â °Í. ÀÏ¹Ý PC´Â ±¦Âú°ÚÁö¸¸ ¾îµð ¼¹ö³ª ³×Æ®¿öÅ© Àåºñ´Â ±×¸® ½±°Ô ÇÒ ¼ö ÀÖ³ª. 1) arp¸¦ ÀÌ¿ëÇÏ´Â ¹æ¹ýÀÌ ÀÖÀ» °ÍÀÌ´Ù. ¹æȺ®À̳ª ³»ºÎ ¼¹ö Áß¿¡ »ç³» Á÷¿øÀÌ °¡Àå ¸¹ÀÌ Á¢±ÙÇÏ´Â ¼¹ö¿¡¼ arp ¸í·ÉÀ» ³»¸®´Â °ÍÀÌ´Ù. ¾Æ´Ï¸é '¸ðµÎ ÀÌÂÊ ¼¹ö¿¡ Á¢¼ÓÇϼ¼¿ä'¶ó°í °øÁö¸¦ ³»¸° ÈÄ È®ÀÎÇÏ¸é ¸ðµç PCÀÇ ·£Ä«µå ¹°¸®ÁÖ¼Ò´Â ¾Ë¾Æ³»´Â °ÍÀº ±Ý¹æÀÌ´Ù. ------------------------------------------------------------------------------- # arp -a Net to Media Table Device IP Address Mask Flags Phys Addr ------ -------------------- --------------- ----- --------------- hme0 192.168.92.65 255.255.255.255 00:10:5a:xx:xx:xx hme0 e1.xxx.net 255.255.255.255 00:00:0c:xx:xx:xx hme0 ns.xxx.net 255.255.255.255 08:00:20:xx:xx:xx hme0 infor.xxx.net 255.255.255.255 08:00:20:xx:xx:xx hme0 192.168.92.51 255.255.255.255 00:00:0c:xx:xx:xx hme0 recycle 255.255.255.255 SP 08:00:20:xx:xx:xx ... »ý·« ... ------------------------------------------------------------------------------- 2) ¹æȺ®À̳ª ¶ó¿ìÅÍ¿¡¼ snmp¸¦ ÀÌ¿ëÇÏ´Â ¹æ¹ý ¹æȺ®À̳ª ¶ó¿ìÅÍ¿¡¼ snmp µ¥¸óÀÌ µ¿ÀÛÇÒ °æ¿ì¿¡ snmpwalk ¸í·ÉÀ¸·Î È®ÀÎÇغ¸ÀÚ. snmpwalk¸¦ »ç¿ëÇϱâ À§Çؼ´Â NET-SNMP ÅøÀÌ ¼³Ä¡µÇ¾î ÀÖ¾î¾ß ÇÑ´Ù. NET-SNMP ȨÆäÀÌÁö´Â http://www.net-snmp.org/ ÀÌ´Ù. snmpwalk -c < community¸í > < ¹æȺ® / ¶ó¿ìÅÍ IP > at.atTable.atEntry.atPhysAddress ------------------------------------------------------------------------------- # snmpwalk -c ?????? 192.168.92.1 at.atTable.atEntry.atPhysAddress at.atTable.atEntry.atPhysAddress.1.1.192.168.92.1 = Hex: 00 00 0C xx xx xx at.atTable.atEntry.atPhysAddress.1.1.192.168.92.2 = Hex: 08 00 4E xx xx xx ... Áß·« ... at.atTable.atEntry.atPhysAddress.1.1.192.168.92.9 = Hex: 00 00 00 00 00 00 at.atTable.atEntry.atPhysAddress.1.1.192.168.92.10 = Hex: 08 00 20 xx xx xx at.atTable.atEntry.atPhysAddress.1.1.192.168.92.11 = Hex: 08 00 20 xx xx xx at.atTable.atEntry.atPhysAddress.1.1.192.168.92.12 = Hex: 08 00 20 xx xx xx at.atTable.atEntry.atPhysAddress.1.1.192.168.92.13 = Hex: 08 00 20 xx xx xx at.atTable.atEntry.atPhysAddress.1.1.192.168.92.14 = Hex: 00 00 00 00 00 00 at.atTable.atEntry.atPhysAddress.1.1.192.168.92.15 = Hex: 00 00 00 00 00 00 at.atTable.atEntry.atPhysAddress.1.1.192.168.92.16 = Hex: 00 40 33 xx xx xx at.atTable.atEntry.atPhysAddress.1.1.192.168.92.17 = Hex: 00 00 00 00 00 00 ... »ý·« ... ------------------------------------------------------------------------------- ¸¸¾à ´Ù¸¥ IPÀε¥ °°Àº ¹°¸®ÁÖ¼Ò°¡ ³ª¿Â´Ù¸é ¾î´À Çϳª´Â IP aliasµÈ °ÍÀÌ´Ù. ÀÌÁ¦ at.atTable.atEntry.atPhysAddress¿¡ ´ëÇؼ ¼³¸íÇغ¼±î. SNMP ÇÁ·ÎÅäÄÝÀÇ MIB-II ±×·ìÀº °èÃþ±¸Á¶·Î µÇ¾î ÀÖÀ¸¸ç »óÀ§ 10°³ÀÇ ±×·ìÀÌ ÀÖ´Ù. system, interfaces, at, ip, .. µî ±×Áß¿¡ at ±×·ì IP ÁÖ¼Ò¿¡ ´ëÇÑ Á¤º¸¸¦ °®°í ÀÖ´Â ±×·ìÀÌ´Ù. system(1) interfaces(2) at(3) +--- atTable(1) +---- atEntery(1) +---- atIfIndex(1) +---- atPhysaddress(2) +---- atNetAddress(3) ip(4) ... |
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