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°­ÁÂ/¼Ò½º/¹®¼­ ¼º°Ý¿¡ ¸ÂÁö ¾Ê´Â ±¤°í,ºñ¹æ,Áú¹®ÀÇ ±ÛÀº Áï½Ã »èÁ¦Çϸç
³»¿ëÀ» º¹»çÇÏ¿© »ç¿ëÇÒ °æ¿ì ¹Ýµå½Ã ÀÌ°÷(http://www.howto.pe.kr)À» Ãâó·Î ¸í½ÃÇÏ¿© ÁÖ¼¼¿ä


Category

  ±è¿µ´ë(2004-06-16 11:22:49, Hit : 14030, Vote : 3157
 http://www.howto.pe.kr
 [°­ÁÂ] À¯¹«¼± °øÀ¯±â Á¦ÀÛ: NAT, firewall, DHCP ¼³Ä¡ [3]

// Á¦  ¸ñ: À¯¹«¼± °øÀ¯±â Á¦ÀÛ: NAT, firewall, DHCP ¼³Ä¡ [3]
// ÀÛ¼ºÀÚ: ±è¿µ´ë( http://www.howto.pe.kr )

ÀÌ °­Á¿¡¼­´Â NAT(Network Address Translation), ºê¸´Áö ¹æÈ­º®, DHCP ¸¦ ¼³Ä¡ÇÏ¿© ½ÇÁ¦ À¯¹«¼± °øÀ¯±â¸¦
Á¦ÀÛÇÏ°Ú´Ù. À̸¦ À§ÇÏ¿© µÎ°¡Áö ¼ÒÇÁÆ®¿þ¾î¸¦ ¼³Ä¡ÇØ¾ß Çϴµ¥ iptables ¿Í DHCP ÀÌ´Ù.
iptables´Â Å©°Ô 4°¡Áö ±â´ÉÀÌ Àִµ¥ IP °øÀ¯(IP masquerade), ¼­¹ö ºÎÇϺлê(port forwarding), Åõ¸í
ÇÁ¶ô½Ã(redirection), packet filtering ÀÌ´Ù. NAT(º¸Åë masquerade À¸·Î ºÎ¸£±âµµ ÇÏÁö¸¸ NAT °¡ ´õ Å«
ÀǹÌÀÌ´Ù)´Â ÆÐŶÀÇ ³»¿ë Áï ÁÖ¼Ò, Æ÷Æ®¹øÈ£ µîÀ» º¯°æÇÑ´Ù. Áï ÇÑ °³ÀÇ IP ÁÖ¼Ò¸¦ ¿©·¯ ´ëÀÇ PC¿¡¼­ °øÀ¯ÇÏ¿©
ÀÎÅͳÝÀ» »ç¿ëÇϴµ¥ NAT ±â´ÉÀ» »ç¿ë ÇÑ´Ù. ¶ÇÇÑ ÇÑ °³ÀÇ µµ¸ÞÀÎ ³×ÀÓ¿¡ ´ëÇØ ¿©·¯ ´ëÀÇ ¼­¹ö°¡ ¼­ºñ½º¸¦
Á¦°øÇÏ´Â ¼­¹ö ºÎÇϺлê(port forwarding ±â´É)¿¡µµ ¿ª½Ã NAT°¡ »ç¿ëµÈ´Ù.
±×¸®°í ebtables ¶ó´Â »õ·Î¿î ÅøÀÌ µîÀåÇÏ¿´´Âµ¥ iptables Àº OSI 3~4 °èÃþ¿¡¼­ ÁÖ·Î µ¿ÀÛÇÑ´Ù¸é ebtables ´Â
2°èÃþ ¸µÅ© ·¹À̾¼­ µ¿ÀÛÇÏ¿© MAC ¼öÁØÀÇ °í¼öÁØ ÇÁ·¡ÀÓ ÇÊÅ͸µÀ̳ª NAT ¸¦ MAC ¼öÁØÀ¸·Î ²ø¾î ³»¸®´Â
±â´Éµµ ÀÖ´Ù. ¾Æ·¡ Âü°í »çÀÌÆ®¿¡¸¦ Âü°íÇÏ¿© ÀÐ¾î º¸´Â°Íµµ ÁÁÀ»°ÍÀÌ´Ù.

DHCP(Dynamic Host Configuration Protocol) ÇÁ·ÎÅäÄÝÀº TCP/IP ³×Æ®¿öÅ©¿¡¼­ È£½ºÆ® ÄÄÇ»ÅÍ°¡ IP ÁÖ¼ÒÀÇ
ÇÒ´çÀ» ¿äûÇÒ °æ¿ì À̸¦ ÇÒ´çÇØ ÁÖ¸ç µ¿½Ã¿¡ È£½ºÆ®°¡ ¼ÓÇÑ ³×Æ®¿öÅ©¿¡ ´ëÇÑ ´Ù¸¥ Á¤º¸(¿¹: DNS ¼­¹ö ÁÖ¼Ò)¸¦
¾Ë·ÁÁÖ´Â ¿ªÇÒÀ» ÇÑ´Ù. º¸ÅëÀÇ À¯¹«¼± °øÀ¯±â¿¡ ¿¬°áµÈ Ŭ¶óÀ̾ðÆ® PC µéÀº À¯¹«¼± °øÀ¯±â¿¡¼­ Á¦°øÇÏ´Â DHCP
¸¦ ÅëÇÏ¿© IP µîÀÇ ³×Æ®¿öÅ© Á¤º¸¸¦ ¹Þ°ÔµÇ¾î zero-configuration À» °¡´ÉÇÏ°Ô ÇÑ´Ù.

Âü°í »çÀÌÆ®:
  - http://www.linuxlab.co.kr/docs/01-03-2.htm
  - http://www.tldp.org/HOWTO/Ethernet-Bridge-netfilter-HOWTO.html
  - http://chunmok.hihome.com/publish/bridge-iptable/index.html
  - http://www.superuser.co.kr/open_lecture/linux_lab/page72.htm
  - http://ebtables.sourceforge.net/br_fw_ia/br_fw_ia.html

¼³Ä¡ÇÒ ÆÄÀÏ ´Ù¿î:
  - iptables (iptables-1.2.tar.bz2)
      http://www.netfilter.org
  - DHCP (dhcp-3.0pl2.tar.gz)
      http://www.isc.org

±¸ÃàÇÏ°íÀÚ ÇÏ´Â ³×Æ®¿öÅ© ȯ°æ:
  À¯¹«¼± °øÀ¯±âÀÇ ÆÐŶ È帧Àº º¸Åë "³»ºÎ ³×Æ®¿öÅ©"<->"ºê¸´Áö(bridge)"<->"NAT"<->"ÀÎÅͳÝ" ÀÇ ¼ø¼­¸¦
  °ÅÄ£´Ù. À̶§ ³»ºÎ ³×Æ®¿öÅ©´Â ´Ù½Ã À¯¼± ³×Æ®¿öÅ©(eth1)¿Í ¹«¼± ³×Æ®¿öÅ©(wlan0) ·Î ±¸ºÐµÈ´Ù. bridge ´Â
  ¹«¼± ·£°ú À¯¼± ·£À» ³í¸® Æ÷Æ®(port) ·Î ÀνÄÇÏ¿© ÇϳªÀÇ °¡»ó ·£(br0) À¸·Î ±¸¼ºÇØ ÁØ´Ù. ÇÏÁö¸¸ ºê¸´Áö
  br0 ·Î µé¾î¿À´Â À¯/¹«¼± ÆÐŶÀº ÀüºÎ ³»ºÎ IP(192.168.0.100~255)¸¦ °¡Áö¹Ç·Î ºê¸´Áö br0 ¿¡ IP(192.168.0.1)
  ¸¦ ÇÒ´çÇÏ°í ¿©±â¿¡ iptables ¸¦ Àû¿ëÇÏ¿© NAT(masquerading)¸¦ ±¸ÇöÇÏ¿© ³»ºÎIP¸¦ eth0ÀÇ °øÀÎIP·Î ¹Ù²Ù¾î
  (SNAT) ¿ÜºÎ ÀÎÅͳÝÀ¸·Î ³ª°¡´Â °ÍÀÌ¸ç ±× ¿ªµµ ¸¶Âù°¡ÁöÀÌ´Ù.
  Áï eth0 ´Â ÀÎÅͳݰú ¿¬°áµÈ °øÀÎIP¸¦ °¡Áö°í ÀÖ´Ù. wlan0 Àº ¹«¼±·£ ³»ºÎ ³×Æ®¿öÅ©¿Í ¿¬°áµÈ AP ·Î »ç¿ë
  µÇ°í eth1 Àº Çãºê¿Í °°ÀÌ À¯¼±·£ ³»ºÎ ³×Æ®¿öÅ©¿Í ¿¬°áµÈ´Ù. ±×·¯¹Ç·Î wlan0¿Í eth1 °£ÀÇ ³»ºÎ ³×Æ®¿öÅ©´Â
  Åë½ÅÀº bridge ¿¡ ÀÇÇØ »óÈ£ Åë½ÅÀÌ °¡´ÉÇÏ°í wlan0 ¶Ç´Â eth1 ¿¡¼­ ¿ÜºÎ ÀÎÅͳÝÀ¸·Î ³ª°¡´Â ÆäŶÀº bridgeÀÇ
  SNAT ¸¦ °ÅÃÄ eth0 ·Î ³ª°¡´Â°ÍÀÌ´Ù.


1.iptables ¼³Ä¡
  ´Ù¿î¹ÞÀº ¼Ò½ºÀÇ ¾ÐÃàÀ» Ǭ ÈÄ µð·ºÅ丮·Î À̵¿ÇÏ¿© Makefile À» ¼öÁ¤ÇÑ´Ù.
  "KERNEL_PATH" ¿¡´Â Ä¿³Î ¼Ò½º°¡ ÀÖ´Â µð·ºÅ丮¸¦, "DESTDIR" ´Â È£½ºÆ® Àåºñ¿¡¼­ ŸÄÏ Àåºñ·Î NFS ¸¦ ÅëÇÏ¿©
  Àü´ÞÇØÁÙ µð·ºÅ丮(Ÿ°Ù ÀåºñÀÇ NFS Root µð·ºÅ丮)ÀÇ root ¸¦ ÀǹÌÇÑ´Ù.
    [root@cozylinux temp]# bunzip2 iptables-1.2.tar.bz2
    [root@cozylinux temp]# tar xvf iptables-1.2.tar
    [root@cozylinux temp]# cd iptables-1.2
    [root@cozylinux iptables-1.2]# vi Makefile
    KERNEL_DIR=/home/LDS/LDS2000/kernel-2.4.18
    CC:=arm-linux-gcc
    LD:=arm-linux-ld
    AR:=arm-linux-ar
    DESTDIR:=/home/LDS/LDS2000/External/RootFS/image

  ±×·± ÈÄ ÄÄÆÄÀÏÇÏ°í ¼³Ä¡ ÇÑ´Ù
    [root@cozylinux iptables-1.2]# make clean
    [root@cozylinux iptables-1.2]# make
    [root@cozylinux iptables-1.2]# make install

  ¼³Ä¡°¡ ¿Ï·áµÇ¸é DESTDIR ¿¡ ¸í½ÃÇÑ µð·ºÅ丮ÀÇ /usr/local/sbin ¿¡ iptables ½ÇÇàÆÄÀÏÀÌ »ý¼ºµÈ´Ù.
  ÀÌ iptables ÆÄÀÏÀ» ÀÌ¿ëÇÏ¿© °ÅÀÇ ¸ðµç NAT ¿Í ¹æÈ­º® ¼³Á¤ ÀÛ¾÷À» ÇÏÁö¸¸ ¸ÕÀú Ä¿³ÎÀÇ È¯°æÀ» º¯°æÇÏ°í
  Ä¿³ÎÀ» ÄÄÆÄÀÏ ÇØ¾ß ÇÑ´Ù.
  Ä¿³Î ¼Ò½º°¡ ÀÖ´Â µð¸¯Å丮(Linux ÀÇ °æ¿ì´Â º¸Åë /usr/src/linux) ·Î À̵¿ÇÏ¿© make menuconfig ÇÑ´Ù.
    [root@cozylinux /]# cd /home/LDS/LDS2000/kernel-2.4.18
    [root@cozylinux /]# make menuconfig

  ¸ÕÀú ¼³Á¤ÀÇ ¸ÞÀÎ ¸Þ´º¿¡¼­ "Code maturity level options" ¸Þ´º¸¦ ¼±ÅÃÇÑ ÈÄ, "[*] Prompt for development
  and/or incomplete code/drivers" ¸¦ ¼±ÅÃÇÏ¿© ºê¸´Áö¿Í ³ÝÇÊÅ͸¦ ÇÔ²² »ç¿ëÇÒ ¼ö ÀÖµµ·Ï ÇÑ´Ù.
  ´Ù½Ã ¸ÞÀÎ ¸Þ´º¿¡¼­ "Networking options" ¼­ºê ¸Þ´º Ç׸ñÀ¸·Î À̵¿ÇÏ¿© ³ªÅ¸³ª´Â ¸Þ´ºÁß ¾Æ·¡ Ç׸ñµéÀ»
  ¼±ÅÃÇÑ´Ù. iptables µµ °¢°¢ÀÇ ±â´É(masq, conntrack, nat, ...)µéÀ» ¸ðµâ·Î ¿Ã¸®´Â ¹æ¹ý°ú Ä¿³Î¿¡ ÀüºÎ
  Ãß°¡ÇÏ¿© Ä¿³Î ±â´ÉÀ¸·Î ÄÄÆÄÀÏ ÇÏ´Â ¹æ¹ýÀÌ Àִµ¥ ¿©±â¼­´Â ÈÄÀÚ¸¦ »ç¿ëÇÑ´Ù.
    <*> Packet socket
         - ÆÐŶ ÇÁ·ÎÅäÄÝ·Î ³×Æ®¿öÅ©°¡ ¿¬°áµÈ °æ¿ì ¼³Á¤
    [*] Network packet filtering (replaces ipchains)
         - iptables, ³ÝÇÊÅÍ´Â ÀÌÀü Ä¿³Î¿¡¼­ ¹æÈ­º®, ȤÀº ¸Å½ºÄ¿·¹À̵ùÀ̶õ À̸§À¸·Î ºÒ¸®´ø ¿É¼ÇµéÀÇ
           »õ À̸§À¸·Î ³ÝÇÊÅÍ´Â ¸®´ª½º ¹Ú½º¸¦ Áö³ª°¡´Â ³×Æ®¿öÅ© ÆÐŶÀ» °É·¯³»°í(filtering) Á¶ÀÛÇϱâ
           (mangling) À§ÇÑ ±¸Á¶(üÁ¦)ÀÌ´Ù. ÆÐŶ ÇÊÅ͸µÀÇ ÀϹÝÀûÀÎ ¿ëµµ´Â ¿©·¯ºÐÀÇ ¸®´ª½º ¹Ú½º¸¦
           ¹æÈ­º®À¸·Î ¸¸µé¾î ·ÎÄà ³×Æ®¿öÅ©¸¦ ÀÎÅͳÝÀ¸·ÎºÎÅÍ º¸È£ÇÏ¸ç ¹æÈ­º®À¸·Î ¾²ÀÏ ¶§ ÀÌ ±â´ÉÀ»
           "ÆÐŶ ÇÊÅÍ"¶ó ºÎ¸£¸ç, ³×Æ®¿öÅ© ÆÐŶÀ» ÇüÅÂ(type), ±Ù¿ø ȤÀº Ãâ¹ßÁö(source), ¸ñÀûÁö
           (destination) µîÀ» ±âÃÊ·Î °ÅÀý/°ÅºÎÇÒ ¼ö ÀÖ´Ù.
           ÀÌ ¿É¼ÇÀº ¶Ç Çϳª °øÀÎ IP ÁÖ¼Ò°¡ ¾ø´Â ·ÎÄà ³×Æ®¿öÅ© ¸Ó½ÅµéÀ» ÀÎÅͳݿ¡ ¿¬°áÇÒ ¶§ ¿©·¯ºÐÀÇ
           ¸®´ª½º ¹Ú½º¸¦ °ÔÀÌÆ®¿þÀÌ(gateway)·Î ¸¸µé±â À§ÇØ ¾²À̸ç. "¸Å½ºÄ¿·¹À̵ù(masquerading)"À̶ó
           ºÎ¸£´Âµ¥: ·ÎÄà ³×Æ®¿öÅ©¿¡ ¹°·Á ÀÖ´Â ÄÄÇ»ÅÍµé °¡¿îµ¥ Çϳª°¡ ¿ÜºÎ·Î Àü¼ÛÀ» ÇÏ·Á°í ÇÑ´Ù¸é
           °øÀÎ IP ÁÖ¼Ò¸¦ °¡Áö°í ÀÖ´Â ¿©·¯ºÐÀÇ °ÔÀÌÆ®¿þÀÌ ¹Ú½º´Â ±× ÄÄÇ»Å͸¦ "°¡Àå(masquerade)"Çؼ­
           ´ë½Å ÁÖ°í ¹ÞÀ» ¼ö ÀÖ´Ù. ´Ù½Ã ¸»ÇÏ¸é ¿ÜºÎ ¸ñÀûÁö·Î Æ®·¡ÇÈÀ» º¸³»Áö¸¸, ÆÐŶÀÌ ¹æÈ­º® ¹Ú½º
           ÀÚ½ÅÀ¸·ÎºÎÅÍ ³ª¿Â °Íó·³ º¸ÀÌ°Ô ÇÏ·Á°í ÆÐŶÀ» Á¶±Ý ¼Õº¸°ÔµÈ´Ù
    [*] Socket Filtering
         - ¸®´ª½º ¼ÒÄÏ ÇÊÅÍ´Â ¹öŬ¸®ÀÇ ÆÐŶ ÇÊÅͷκÎÅÍ ÆÄ»ýµÈ °ÍÀ¸·Î »ç¿ëÀÚ-°ø°£ ÇÁ·Î±×·¥µéÀÌ ¾Æ¹«
           ¼ÒÄÏ¿¡³ª ÇÊÅ͸¦ ºÙÀÏ ¼ö ÀÖ°í ¼ÒÄÏÀ» ÅëÇØ ¾òÀº µ¥ÀÌÅÍ¿¡ ´ëÇØ Çü½ÄÀ» Á¤ÇÏ°í Çã°¡/ºÒÇã Á¤Ã¥À»
           Ä¿³Î¿¡ ¾Ë¸± ¼ö ÀÖ´Ù. ¸®´ª½º ¼ÒÄÏ ÇÊÅ͸µÀº ÇöÀç TCP¸¦ Á¦¿ÜÇÑ ¸ðµç ¼ÒÄÏ¿¡¼­ µ¿ÀÛÇÑ´Ù
    <*> Unix domain sockets
         - Ç¥ÁØ À¯´Ð½º ¸ÞÄ«´ÏÁòÀ¸·Î XÀ©µµ¿ì ½Ã½ºÅÛÀ̳ª syslog¿Í °°Àº ÇÁ·Î±×·¥µéÀº À̼ÒÄÏÀ» ÀÌ¿ëÇÑ´Ù
    [*] TCP/IP networking
         - ¹Ýµå½Ã ¼±ÅÃ
    [*]   IP: multicasting
         - ³×Æ®¿öÅ©»óÀÇ ¿©·¯ÄÄÇ»ÅÍ¿¡ µ¿½Ã¿¡ °°ÀºÀڷḦ Àü¼ÛÇÒ¼ö ÀÖµµ·Ï ÇÏ´Â ¼­ºñ½º
    <*> 802.1d Ethernet Bridging
         - ´Ù¾çÇÑ NIC »çÀÌÀÇ ºê¸´Áö ±â´É

  ±× ´ÙÀ½ "IP : Netfilter Configuration" ¼±ÅÃÇÏ¿© ¼­ºê ¸Þ´º·Î À̵¿ÇÑ´Ù.
  ¾Æ·¡ Ç׸ñµéÀ» ¼±ÅÃÇÑ´Ù.
    <*> Connection tracking (required for masq/NAT)
        - ¿¬°á ÃßÀû(Connection tracking)Àº ¾î¶² ÆÐŶÀÌ ¿©·¯ºÐÀÇ ¸Ó½ÅÀ» °ÅÃÄ °¬´ÂÁö, ±×µéÀÌ ¾ó¸¶³ª ¿¬°á
          µÇ¾ú´ÂÁö ±× ±â·ÏÀ» À¯ÁöÇÏ´Â °ÍÀ» ¸»Çϸç, ÀÌ ¿É¼ÇÀº ¸Å½ºÄ¿·¹À̵ù ȤÀº ´Ù¸¥ Á¾·ùÀÇ ³×Æ®¿öÅ© ÁÖ¼Ò
          º¯È¯(Fast NAT´Â »©°í)¿¡ ÇÊ¿äÇÏ´Ù ³×Æ®¿öÅ© Àåºñ¸¦ ¸¸µç´Ù¸é ¹Ýµå½Ã ÇÊ¿ä
    <*>   FTP protocol support
        - FTP ¼­ºñ½º¿¡ ´ëÇÑ Á¢¼ÓÃßÀû±â´É »ç¿ë½Ã ¼³Á¤
    < >   IRC protocol support
        - ÀÎÅÍ³Ý Ã¤ÆÃÀÎ IRC¿¡ ´ëÇؼ­ Á¢¼Ó ÃßÀû ±â´ÉÀ» »ç¿ëÇÒ¶§ ¼³Á¤
    < > Userspace queueing via NETLINK (EXPERIMENTAL)
    <*> IP tables support (required for filtering/masq/NAT)
        - iptableÀº ÀϹÝÀûÀ̸ç, È®ÀåÇÒ ¼ö ÀÖ´Â ÆÐŶ ½Äº° üÁ¦À̸ç ÆÐŶ ÇÊÅ͸µ°ú full NAT
          (masquerading, port forwarding, etc) ¼­ºê½Ã½ºÅÛÀº ÀÌÁ¦ iptalbes¸¦ »ç¿ëÇÑ´Ù. ÆÐŶ ÇÊÅ͸µ,
          NATÀÇ ¸ðµç ±â´É, È®ÀåµÈ ¶ó¿ìÆà ¼­ºñ½º °¡¿îµ¥ Çϳª¶óµµ ¾²·Á¸é ÀÌ ¿É¼Ç¿¡¼­ üũ°¡ Çʼö
    <*>   limit match support
        - ¹æÈ­º® ±ÔÄ¢ÀÇ ÀÏÄ¡À²À» Á¶ÀýÇÒ¼ö ÀÖ°ÔÇÏ´Â ¿É¼Ç
    <*>   MAC address match support
        - ÀÌ´õ³Ý Ä«µåÀÇ ¸Æ ÁÖ¼Ò ÀÏÄ¡¼ºÀº ÆÐŶÀÇ ÀÌ´õ³Ý ÁÖ¼Ò¿¡ µû¶ó¼­ ÆÐŶµéÀ» ÀÏÄ¡½ÃÄÑ ÁÖ´Â ±â´É
    <*>   netfilter MARK match support
        - ÆÐŶ ³»¿¡ ÀÖ´Â 'nfmark'°ª¿¡ µû¶ó¼­ ÆÐŶµéÀÌ ÀÏÄ¡µÇµµ·Ï ÇØÁÖ´Â ¿É¼Ç
    <*>   Multiple port match support
        - ¸ÖƼÆ÷Æ® ¸ÅĪÀº Ãâ¹ßÁö³ª ¸ñÀûÁö Æ÷Æ®ÀÇ ½Ã¸®Áî¿¡ ±â¹ÝÇÑ TCP³ª UDP ÆÐŶ ¸ÅÄ¡¸¦ ´Ù·é´Ù.
          ÀϹÝÀûÀ¸·Î ±ÔÄ¢ Çϳª´Â ÇÑ °¡Áö Æ÷Æ® ¹üÀ§¸¦ ¸ÅÄ¡ÇÒ ¼ö ÀÖÁö¸¸ ÀÌ ±â´ÉÀ» È°¼ºÈ­ÇÏ¸é ±ÔÄ¢ Çϳª¿¡
          ¿©·¯ Æ÷Æ®¸¦ ¸ÅÄ¡ °¡´É
    <*>   TOS match support
        - TOS ¸ÅĪÀº IP ÆÐŶÀÇ ¼­ºñ½º ÇʵåÀÇ Çü½Ä¿¡(Type Of Services) ±â¹ÝÇÑ ÆÐŶ ¸ÅÄ¡¸¦ ´Ù·ë
    <*>   AH/ESP match support
    <*>   LENGTH match support
    <*>   TTL match support
    <*>   tcpmss match support
        - TCP SYNÆÐŶÀÇ MSS°ªÀ» °Ë»çÇÒ¼ö ÀÖµµ·Ï ÇØÁÖ¸ç ±×·¯ÇÑ Á¢¼Ó¿¡ À־ ÃÖ´ë ÆÐŶ Å©±â¸¦ Á¶ÀýÇØ ÁÖ´Â
          'tcpmss' ÀÏÄ¡¼ºÀ» ºÎ¿©ÇÑ´Ù
    <*>   Connection state match support
        - ¿¬°á »óÅ ¿¡¼­ ÃßÀûÇÑ Ä¿³Ø¼ÇÀÇ °ü°è¿¡ ±â¹ÝÇÑ(¿¹¸¦ µé¾î ÀÌÀü ÆÐŶµé) ÆÐŶ ¸ÅÄ¡¸¦ ´Ù·ë
    <*>   Unclean match support (EXPERIMENTAL)
    <*>   Owner match support (EXPERIMENTAL)
    <*>   Packet filtering
        - ÆÐŶ ÇÊÅ͸µÀº ·ÎÄà input, Æ÷¿öµù°ú ·ÎÄà output¿¡¼­, ½ÉÇà ÆÐŶ ÇÊÅ͸µÀ» À§ÇÑ ¿¬¼ÓµÈ ·êÀ» ´ã´Â
          'ÇÊÅÍ' Å×À̺íÀ» ±ÔÁ¤
    <*>     REJECT target support
        - REJECT Ÿ±êÀº µé¾î¿À´Â ÆÐŶ¿¡ ´ëÇØ ±ÔÄ¢À» °Ë»çÇؼ­ ¾Æ¹« Ãâ·Â ¾øÀÌ ¹ö¸®´Â(DROP) ´ë½Å ICMP ¿¡·¯
          ¸Þ½ÃÁö·Î ÀÀ´äÇÏ´Â ÇÊÅ͸µ ±ÔÄ¢À» ´Ù·ë
    < >     MIRROR target support (EXPERIMENTAL)
    <*>   Full NAT
        - ¸¶½ºÄ¿·¹À̵ù, Æ÷Æ® Æ÷¿öµù, ±×¸®°í ´Ù¸¥ ÇüÅÂÀÇ ¿ÏÀüÇÑ ³×Æ®¿öÅ© ÁÖ¼Ò Æ÷Æ®º¯È¯ ±â´ÉÀ» Çã¿ëÇÑ´Ù.
          ÀÌ´Â iptables¿¡¼­ 'nat' Å×À̺í·Î Á¶Á¤µÈ´Ù
    <*>     MASQUERADE target support
        - ¸Å½ºÄ¿·¹À̵ùÀº NATÀÇ Æ¯º°ÇÑ ÄÉÀ̽º·Î ³ª°¡´Â ¿¬°áµéÀÌ ¸ðµÎ ƯÁ¤ÇÑ ÀÎÅÍÆäÀ̽ºÀÇ ÁּҷκÎÅÍ
          ³ª°£ °Íó·³ º¸À̵µ·Ï ¹Ù²ï´Ù. ±× ÀÎÅÍÆäÀ̽º¸¦ ³»¸®¸é, ¿¬°áµÈ üÀεéÀ» ÀÒ¾î¹ö°Ô µÈ´Ù. ¿©±â±îÁö´Â
          SNAT¿Í ´Ù¸¦°Ô ¾ø¾î º¸ÀÌÁö¸¸ ¸Å½ºÄ¿·¹À̵ùÀº ¿É¼ÇÀº ´ÙÀ̳ª¹Í IP ÁÖ¼Ò¸¦ »ç¿ëÇÏ´Â ´ÙÀ̾ó¾÷ °èÁ¤
          ¿¡¸¸ À¯¿ëÇÏ´Ù. (¿©·¯ºÐÀÇ IP ÁÖ¼Ò°¡ Á¢¼ÓÇÒ ¶§¸¶´Ù ´Þ¶óÁö´Â ADSL, Cable, Modem µî) Àü¿ë¼±, MyIP
          µî °íÁ¤µÈ IP ÁÖ¼Ò¸¦ °¡Áö°í ÀÖ´Ù¸é SNATÀ» »ç¿ë
    <*>     REDIRECT target support
        - Åõ¸íÇÁ¶ô½Ã »ç¿ë½Ã ÇÊ¿äÇÏ´Ù. REDIRECT´Â NATÀÇ Æ¯º°ÇÑ ÄÉÀ̽º·Î ¸ðµç µé¾î¿À´Â ¿¬°áµéÀº µé¾î¿À´Â
          ÀÎÅÍÆäÀ̽ºÀÇ ÁÖ¼Ò¿¡ ¸ÅÇεǹǷÎ, ÆÐŶµéÀº ¸®´ª½º ¹Ú½º¸¦ Áö³ª¼­ ´Ù¸¥ ¸Ó½Å¿¡ Á÷Á¢ ¿¬°áµÇ´Â ´ë½Å
          ·ÎÄà ¸Ó½ÅÀ¸·Î ¿À°Ô µÈ´Ù. ÀÌ ¿É¼ÇÀº Åõ¸íÇÑ ÇÁ·Ï½Ã¿¡¼­ À¯¿ëÇÏ´Ù
    < >     Basic SNMP-ALG support (EXPERIMENTAL)
    <*>   Packet mangling
        - iptables¿¡ ÆÐŶÀÌ ¾î¶»°Ô ¶ó¿ìÆ®µÇ´Â°¡¿¡ ¿µÇâÀ» ÁÖ´Â ´Ù¾çÇÑ ÆÐŶº¯È¯¿¡ ÀÌ¿ëµÇ´Â 'mangle'
          Å×ÀÌºí¿¡ ºÎ¿©ÇÔ
    < >     TOS target support
        - ÀÌ ¿É¼ÇÀº ¶ó¿ìÆÿ¡ ¾Õ¼­ 'mangle' Å×ÀÌºí ¾È¿¡ IP ÆÐŶÀÇ Type Of Service Çʵ带 ¹Ù²Ù´Â ±ÔÄ¢
          µéÀ» ¸¸µéµµ·Ï 'TOS' Ÿ±êÀ» Ãß°¡
    < >     MARK target support
        - ÀÌ ¿É¼ÇÀº ¶ó¿ìÆÿ¡ ¾Õ¼­ 'mangle' Å×ÀÌºí ¾È¿¡ ÆÐŶ ÆÐŶ°ú °ü·ÃµÈ netfilter mark(nfmark)
          Çʵ带 ¹Ù²Ù´Â ±ÔÄ¢µéÀ» ¸¸µå´Â 'MARK' Ÿ±êÀ» Ãß°¡Çϸç ÀÌ ±â´ÉÀº ¶ó¿ìÆà ¸Þ½îµå¸¦ ¹Ù²Ü ¼ö ÀÖ°í
          ´Ù¸¥ ¼­ºê½Ã½ºÅÛ¿¡ ÀÇÇØ ±×µéÀ» ÇàÅÂ(behavior)¸¦ ¹Ù²Ùµµ·Ï ÀÌ¿ëµÉ ¼öµµ ÀÖ´Ù. ¿¹¸¦ µé¾î LBS¿¡¼­
          ¸¶Å© °ªÀÌ 7 ÀÎ ÆÐŶµéÀº ADSL ¶óÀÎÀ» ÅëÇØ ¼ÒÅëÇϵµ·Ï ¶ó¿ìÆà Å×ÀÌºí¿¡¼­ ÁöÁ¤ÇÒ ¼ö ÀÖ´Ù
    <*>   LOG target support
        - iptables³»¿¡¼­ ÆÐŶ Çì´õ¸¦ syslog ¿¡ ±â·ÏÇϵµ·Ï ÇÏ´Â ±ÔÄ¢À» ¸¸µé¼ö ÀÖµµ·Ï 'LOG'ŸÄÏÀ» Á¦°ø
    < >   ULOG target support
    <*>   TCPMSS target support
        - ¿¬°áÀÇ ÃÖ´ë Å©±â¸¦ Á¦¾îÇϱâ À§ÇØ TCP SYN ÆÐŶÀÇ MSS °ªÀ» º¯°æÇÒ ¼ö ÀÖ´Â 'TCPMSS' Ÿ±êÀ»
          Ãß°¡ÇÑ´Ù. (´ë°³ ³ª°¡´Â ÀÎÅÍÆäÀ̽ºÀÇ MTUº¸´Ù 40 ÀÛ°Ô Á¦ÇÑ). ÀÌ ±â´ÉÀº ISP¸¦ ³ú»ç½ÃÅ°´Â ¹üÁ˸¦
          ¸·¾Æ³»°Å³ª ICMP ÇÁ·¡±×¸ÕÅ×À̼ÇÀÌ ÇÊ¿äÇÑ ÆÐŶµéÀ» ¸·´Â ¼­¹ö¿¡ »ç¿ëµÇ¸ç ƯÈ÷ ¾ßÈÄ µî ÀÌÀü¿¡
          È£µÇ°Ô ´çÇÑ ÀûÀÌ ÀÖ´Â °÷¿¡¼­´Â TCPMSS¿¡ ¹Î°¨Çؼ­ ±×·± »çÀÌÆ®¿¡ Á¢±ÙÇÏ·Á¸é ÀÌ ±â´ÉÀ» »ç¿ëÇؾß
          ÇÒÁöµµ ¸ð¸¥´Ù. ¿©·¯ºÐÀÇ ¸®´ª½º ¹æÈ­º®/¶ó¿ìÅͷκÎÅÍ Àß µ¿ÀÛÇÏÁö¸¸ ÀÌ µÚ¿¡ ÀÖ´Â ¸Ó½ÅµéÀº Å«
          ÆÐŶµéÀ» Àý´ë·Î ±³È¯ÇÒ ¼ö ¾ø°Ô µÈ´Ù.

2.DHCP ¼³Ä¡
  Ä¿³Î¿¡¼­ DHCP ¸¦ Áö¿øÇϵµ·Ï ȯ°æÀ» ¼³Á¤ÇØÁÖ¾î¾ß ÇÑ´Ù.
  Ä¿³Î ¼Ò½º°¡ ÀÖ´Â µð¸¯Å丮(Linux ÀÇ °æ¿ì´Â º¸Åë /usr/src/linux) ·Î À̵¿ÇÏ¿© make menuconfig ÇÑ´Ù.
    [root@cozylinux /]# cd /home/LDS/LDS2000/kernel-2.4.18
    [root@cozylinux /]# make menuconfig

  ¼³Á¤ÀÇ ¸ÞÀÎ ¸Þ´º¿¡¼­ "Networking options" ¼­ºê ¸Þ´º Ç׸ñÀ¸·Î À̵¿ÇÏ¿© ³ªÅ¸³ª´Â ¸Þ´ºÁß ¾Æ·¡ Ç׸ñµéÀ»
  ¼±ÅÃÇÑ´Ù.
    <*> IP: kernel level autoconfiguration
      [*] IP: DHCP support

  ´Ù¿î¹ÞÀº DHCP ¼Ò½ºÀÇ ¾ÐÃàÀ» Ǭ ÈÄ µð·ºÅ丮·Î À̵¿ÇÑ´Ù
    [root@cozylinux temp]# tar xvf dhcp-3.0pl2.tar.gz
    [root@cozylinux temp]# cd dhcp-3.0pl2

  Makefile.conf ÆÄÀÏÀÇ "## Porting::" ¾Æ·¡¿¡ ÄÄÆÄÀÏ È¯°æ Á¤º¸¸¦ ¾Æ·¡Ã³·³ Ãß°¡ÇÑ´Ù.
    CC=arm-linux-gcc
    LD=arm-linux-ld
    AR=arm-linux-ar
    RANLIB=arm-linux-ranlib
    DESTDIR=/home/LDS/LDS2000/External/RootFS/image

  ±×·± ÈÄ È¯°æÀ» Àû¿ëÇÏ°í ÄÄÆÄÀÏÇÏ°í ¼³Ä¡ ÇÑ´Ù
    [root@cozylinux dhcp-3.0pl2]# ./configure
    [root@cozylinux dhcp-3.0pl2]# make clean
    [root@cozylinux dhcp-3.0pl2]# make
    [root@cozylinux dhcp-3.0pl2]# make install

  ¼³Ä¡°¡ ¿Ï·áµÇ¸é DESTDIR ¿¡ ¸í½ÃÇÑ µð·ºÅ丮ÀÇ /usr/sbin ¿¡ dhcpd DHCP ¼­¹ö ½ÇÇàÆÄÀÏÀÌ »ý¼ºµÈ´Ù.

  ¼³Ä¡µÈ dhcpd DHCP ¼­¹ö¿¡¼­´Â ´ÙÀ½°ú °°Àº dhcpd.conf ¼³Á¤ ÆÄÀÏ¿¡ ÀÇÇØ Å¬¶óÀ̾ðÆ®¿¡°Ô ÇÒ´çÇÒ IPÀÇ
  ¹üÀ§ ¹× ±âº»ÀûÀ¸·Î ÇÊ¿äÇÑ ³×Æ®¿öÅ© Á¤º¸¸¦ ÀÛ¼ºÇÏ¿©¾ß ÇÑ´Ù.
  DESTDIR ¿¡ ¸í½ÃÇÑ µð·ºÅ丮ÀÇ etc ¾Æ·¡¿¡ ÀÖ´Â dhcpd.conf ÆÄÀÏ¿¡ ¾Æ·¡ÀÇ ³»¿ëÀ» Ãß°¡ÇÑ´Ù.
    ddns-update-style interim;
    default-lease-time 3600;
    max-lease-time 86400;
    option subnet-mask 255.255.255.0;
    option domain-name-servers 164.124.101.2, 211.204.31.1;
    option domain-name "howto.pe.kr";

    subnet 192.168.0.0 netmask 255.255.255.0 {
      range 192.168.0.100 192.168.0.250;
      option broadcast-address 192.168.0.255;
      option routers 192.168.0.1;
    }

  À§ÀÇ ³»¿ëÀº À¯¼± ³×Æ®¿öÅ©(eth1) ¶Ç´Â ¹«¼± ³×Æ®¿öÅ©(wlan0)ÀÇ ºê¸´ÁöÀÎ br0(192.168.0.1)·Î DHCP ¿ä±¸°¡
  µé¾î¿À¸é(DHCP ¿ä±¸´Â Ŭ¶óÀ̾ðÆ®¿¡¼­ broadcasting À¸·Î ¿äûµÈ´Ù) IP´Â 192.168.0.100~255, Default
  Gateway ´Â 192.168.0.1, DNS ´Â 164.124.101.2 ¸¦ ÇÒ´çÇ϶ó´Â ÀǹÌÀÌ´Ù. 2Â÷ DNS °¡ ÀÖ´Ù¸é ±× µÚ¿¡
  ÄÞ¸¶¸¦ Ãß°¡ÇÏ¿© °è¼Ó Àû¾îÁÖ¸é µÈ´Ù.

  ½ÇÁ¦ DHCP ¼­¹ö¸¦ br0 ¸®½º´× NIC ·Î ½ÇÇàÇÏ¸é ´ÙÀ½°ú °°Àº ¸Þ½ÃÁö°¡ º¸ÀδÙ.
    [root@cozyLDS etc]$dhcpd br0
    Internet Software Consortium DHCP Server V3.0pl2
    Copyright 1995-2003 Internet Software Consortium.
    All rights reserved.
    For info, please visit http://www.isc.org/products/DHCP
    Wrote 3 leases to leases file.
    Listening on LPF/br0/00:0a:d4:00:31:2c/192.168.0.0/24
    Sending on   LPF/br0/00:0a:d4:00:31:2c/192.168.0.0/24
    Sending on   Socket/fallback/fallback-net

  ³»ºÎ À¯¼± ³×Æ®¿öÅ©¿Í ¿¬°áµÈ eth1 °ú ³»ºÎ ¹«¼± ³×Æ®¿öÅ©¿Í ¿¬°áµÈ wlan0 Àº bridge br0 ¿¡ ¿¬°áµÇ¾î
  ÀÖÀ¸¹Ç·Î ÀÏ¹Ý PCÀÇ ºê·ÎµåÄɽºÆà DHCP ¿äûÀº br0 ¿¡ ÀÇÇØ Á¢¼öµÇ¸ç dhcpd.cof ¿¡ ¸í½ÃµÈ ȯ°æÀ» º¸°í
  br0 °¡ Àû´çÇÑ IP¸¦ ³»ºÎ ³×Æ®¿öÅ© PC µé¿¡°Ô ÇÒ´çÇØ ÁְԵȴÙ.

3.½ÇÇà ¹× µ¿ÀÛ È®ÀÎ
  ÀÌÁ¦ Ä¿³ÎÀ» ´Ù½Ã ÄÄÆÄÀÏÇÑ´Ù. ¾Æ·¡¿¡¼­ "make dep" ´Â ¸Å¹ø ¼öÇàÇÒ ÇÊ¿ä°¡ ¾ø´Ù. make ´Â ELF Çü½ÄÀÇ Ä¿³Î
  À̹ÌÁö¸¦ »ý¼ºÇϹǷΠ¸Þ¸ð¸®¿¡ Á¦¾àÀÌ Àִ Ÿ°Ù º¸µå¿¡ ¿Ã¸®±â À§ÇØ ¾ÐÃàµÈ ELF ¸¦ À§ÇØ "make zImage"
  ·Î ÄÄÆÄÀÏ ÇÑ´Ù. ¸¸µç Ä¿³Î À̹ÌÁö¸¦ ¿Ã¸®´Â(flash) ¹æ¹ýÀº Ÿ°Ù º¸µå¸¶´Ù Ʋ¸®¹Ç·Î ¼³¸íÀº »ý·«ÇÑ´Ù.
    [root@cozylinux /]# cd /home/LDS/LDS2000/kernel-2.4.18
    [root@cozylinux kernel-2.4.18]# make dep
    [root@cozylinux kernel-2.4.18]# make clean
    [root@cozylinux kernel-2.4.18]# make zImage

  Áö±Ý±îÁö ¼³Ä¡ÇÑ ÆÄÀϵéÀ̳ª ȯ°æ ¼³Á¤À» Ÿ°Ù Àåºñ ºÎÆýà ¸¶´Ù ½ÇÇàÇϵµ·Ï Çϱâ À§ÇØ rc.???? °è¿­À»
  ÆÄÀÏ¿¡ µî·ÏÇØ ³õÀ¸¸é ÆíÇÒ°ÍÀÌ´Ù. ±×·¡¼­ º»ÀÎÀÇ °æ¿ì´Â rc.sysinit ¿¡ ¾Æ·¡¿Í °°ÀÌ Â÷·Ê´ë·Î µî·ÏÇÏ¿©
  ºÎÆýà ÀÚµ¿ ½ÇÇàµÇµµ·Ï ÇÏ¿´´Ù.

    #### [1] HostAP Card Driver ####
    insmod /lib/modules/2.4.18-rmk7-pxa3/net/hostap_crypt.o
    insmod /lib/modules/2.4.18-rmk7-pxa3/net/hostap_crypt_wep.o
    insmod /lib/modules/2.4.18-rmk7-pxa3/net/hostap.o

    #### [2] Activate NIC ####
    /sbin/ifconfig eth0 211.204.72.60 netmask 255.255.255.0 up
    route add default gw 211.204.72.254
    route add -host 255.255.255.255 dev eth0

    /sbin/ifconfig eth1 0.0.0.0 promisc up
    /sbin/cardmgr -ov
    /sbin/ifconfig wlan0 down
    /sbin/ifconfig wlan0 0.0.0.0 promisc up

    #### [3] bridge utils ####
    /sbin/brctl addbr br0        # add virtual ethernet bridge interface
    /sbin/brctl stp br0 off      # spanning tree protocol off: a loop is highly improbable
    /sbin/brctl addif br0 eth1   # now, physical ethernet interface become a logical bridge port
    /sbin/brctl addif br0 wlan0
    /sbin/ifconfig br0 192.168.0.1 netmask 255.255.255.0 up
    route add -host 255.255.255.255 dev br0

    #### [4] Access Point ####
    /usr/local/sbin/iwconfig wlan0 mode master
    /usr/local/sbin/iwconfig wlan0 essid ssap
    /usr/local/sbin/iwconfig wlan0 nickname "cozykyd's AP (ssap)"
    #/usr/local/sbin/iwconfig wlan0 key s:12345
    #/usr/local/sbin/iwconfig wlan0 key s:1234567891234

    /usr/local/sbin/iwpriv wlan0 prism2_param 3 1
    /usr/local/sbin/iwpriv wlan0 prism2_param 8 2
    /usr/local/sbin/iwpriv wlan0 prism2_param 9 100
    /usr/local/sbin/iwpriv wlan0 prism2_param 10 1
    #/usr/local/sbin/iwpriv wlan0 prism2_param 30 1   # Operation not supported

    ## [5] kernel IP forwarding service between br0 and eth0
    echo 1 > /proc/sys/net/ipv4/ip_forward

    ## [6] iptables
    /usr/local/sbin/iptables -F
    /usr/local/sbin/iptables -t nat -F
    /usr/local/sbin/iptables -P INPUT ACCEPT
    /usr/local/sbin/iptables -F INPUT
    /usr/local/sbin/iptables -P OUTPUT ACCEPT
    /usr/local/sbin/iptables -F OUTPUT
    /usr/local/sbin/iptables -P FORWARD DROP
    /usr/local/sbin/iptables -F FORWARD

    # routing bewteen eth0 and br0(eth1, wlan0)
    /usr/local/sbin/iptables -A FORWARD -i eth0 -o br0 -m state --state ESTABLISHED,RELATED -j ACCEPT
    /usr/local/sbin/iptables -A FORWARD -i br0 -o eth0 -j ACCEPT
    #/usr/local/sbin/iptables -A FORWARD -j LOG

    # SNAT
    /usr/local/sbin/iptables -t nat -A POSTROUTING -s 192.168.0.0/24 -j MASQUERADE
    #/usr/local/sbin/iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE   # alternate
    #/usr/local/sbin/iptables -t nat -A POSTROUTING -o eth0 -j SNAT --to 211.204.72.60   # alternate

    # tcp-MSS patch
    /usr/local/sbin/iptables -A FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu

    # [7] start DHCP server on br0
    #touch /etc/dhcpd.leases
    /usr/sbin/dhcpd br0

  iptables ÀÇ SNAT ºÎºÐÀ» º¸¸é µÎ¹ø° ¼¼¹ø°ÁÙÀ» ÁÖ¼®À¸·Î ¸¸µé¾ú´Âµ¥ ±×°ÍÀº ù¹ø° ÁÙ°ú °°Àº È¿°ú¸¦
  ³»´Â ´Ù¸¥ ¿É¼ÇÀ» º¸¿©ÁÖ±â À§Çؼ­´Ù. ±×¸®°í ¿©±â¼­´Â iptables ÀÇ ¿ëµµ¸¦ NAT ·Î¸¸ ÁÖ·Î »ç¿ëÇߴµ¥
  ¿©±â¿¡ ¹æÈ­º® °ü·Ã rule À» Ãß°¡ÇÏ¿© ÇØÅ·¿¡ °­·ÂÇÑ ¹æÈ­º®À» ±¸ÃàÇϱ⠹ٶõ´Ù.
  À§ÀÇ iptables ¿Í °ü·ÃµÈ ÀÚ¼¼ÇÑ ¼³¸íÀº ÇÏÁö ¾Ê´Â´Ù. ¿ö³« ÀÚ·á°¡ ¸¹¾Æ ±Ý¹æ ã¾Æº¼ ¼ö ÀÖÀ»°ÍÀÌ´Ù.

  À̷μ­ NAT ¹× DHCP ¸¦ ¼³Ä¡ÇÏ¿´´Ù. ½ÇÁ¦ ³»ºÎ ³×Æ®¿öÅ©ÀÇ PC µéÀÌ DHCP ·Î ³»ºÎ IP¸¦ ¹Þ¾Æ¿À°í ¶ÇÇÑ
  NAT ¸¦ ÅëÇÏ¿© ¿ÜºÎ ÀÎÅͳݿ¡ ¿¬°áµÇ´ÂÁö Å×½ºÆ®Çϱ⠹ٶõ´Ù.

  ½ÇÁ¦ À¯¼± ·£Ä«µå¸¦ »ç¿ëÇÏ´Â PC ¿¡¼­ IP¸¦ ¹Þ¾Æ¿Â´Ù¸é ´ÙÀ½°ú °°ÀÌ ³ªÅ¸³¯ °ÍÀÌ´Ù.
    C:\>ipconfig /all
    Windows 2000 IP Configuration
        Host Name . . . . . . . . . . . . : mawang
        Primary DNS Suffix  . . . . . . . : howto.pe.kr
        Node Type . . . . . . . . . . . . : Broadcast
        IP Routing Enabled. . . . . . . . : No
        WINS Proxy Enabled. . . . . . . . : No
        DNS Suffix Search List. . . . . . : howto.pe.kr

    Ethernet adapter ·ÎÄà ¿µ¿ª ¿¬°á:
        Connection-specific DNS Suffix  . : howto.pe.kr
        Description . . . . . . . . . . . : FE574B-3Com 10/100 LAN PCCard-Fast thernet
        Physical Address. . . . . . . . . : 00-50-DA-D0-33-CD
        DHCP Enabled. . . . . . . . . . . : Yes
        Autoconfiguration Enabled . . . . : Yes
        IP Address. . . . . . . . . . . . : 192.168.0.248
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 192.168.0.1
        DHCP Server . . . . . . . . . . . : 192.168.0.1
        DNS Servers . . . . . . . . . . . : 164.124.101.2
                                            211.204.31.1
        Lease Obtained. . . . . . . . . . : 2004³â 6¿ù 13ÀÏ ÀÏ¿äÀÏ ¿ÀÈÄ 8:49:10
        Lease Expires . . . . . . . . . . : 2004³â 6¿ù 13ÀÏ ÀÏ¿äÀÏ ¿ÀÈÄ 9:49:10

  ¹«¼± ·£Ä«µå¸¦ »ç¿ëÇÏ´Â PC ¿¡¼­ IP¸¦ ¹Þ¾Æ¿Â´Ù¸é ´ÙÀ½°ú °°ÀÌ ³ªÅ¸³¯ °ÍÀÌ´Ù.
    C:\>ipconfig /all
    Windows 2000 IP Configuration
        Host Name . . . . . . . . . . . . : mawang
        Primary DNS Suffix  . . . . . . . : howto.pe.kr
        Node Type . . . . . . . . . . . . : Broadcast
        IP Routing Enabled. . . . . . . . : No
        WINS Proxy Enabled. . . . . . . . : No
        DNS Suffix Search List. . . . . . : howto.pe.kr

    Ethernet adapter ·ÎÄà ¿µ¿ª ¿¬°á 3:
        Connection-specific DNS Suffix  . : howto.pe.kr
        Description . . . . . . . . . . . : RoamAbout 802.11 DS
        Physical Address. . . . . . . . . : 00-E0-63-50-9A-9E
        DHCP Enabled. . . . . . . . . . . : Yes
        Autoconfiguration Enabled . . . . : Yes
        IP Address. . . . . . . . . . . . : 192.168.0.249
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 192.168.0.1
        DHCP Server . . . . . . . . . . . : 192.168.0.1
        DNS Servers . . . . . . . . . . . : 164.124.101.2
                                            211.204.31.1
        Lease Obtained. . . . . . . . . . : 2004³â 6¿ù 13ÀÏ ÀÏ¿äÀÏ ¿ÀÈÄ 9:12:27
        Lease Expires . . . . . . . . . . : 2004³â 6¿ù 13ÀÏ ÀÏ¿äÀÏ ¿ÀÈÄ 10:12:27

          





4   [ÀÓº£µðµå] [°­ÁÂ] À¯¹«¼± °øÀ¯±â Á¦ÀÛ: Á¦ÀÛ È¯°æ [1]  ±è¿µ´ë 2004/06/16 12591 1769
3   [ÀÓº£µðµå] [°­ÁÂ] À¯¹«¼± °øÀ¯±â Á¦ÀÛ: PCMCIA, HostAP, Bridge ¼³Ä¡ [2]  ±è¿µ´ë 2004/06/16 21894 2052
  [ÀÓº£µðµå] [°­ÁÂ] À¯¹«¼± °øÀ¯±â Á¦ÀÛ: NAT, firewall, DHCP ¼³Ä¡ [3]  ±è¿µ´ë 2004/06/16 14030 3157
1   [ÀÓº£µðµå] [°­ÁÂ] À¯¹«¼± °øÀ¯±â Á¦ÀÛ: 802.1x, RADIUS ¼³Ä¡ [4]  ±è¿µ´ë 2004/06/16 24417 2397

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