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7. DNS ¿À·ù ¼öÁ¤ µµ±¸

7.1 NSLOOKUP

³×ÀÓ¼­¹ö¸¦ ¿î¿µÇÏ°í °ü¸®Çϴµ¥ ÀÖ¾î ¹®Á¦¸¦ ¹ß°ßÇÏ°í ÇØ°áÇϱâ À§ÇØ ResolverÀÇ ÀÔÀåÀ¸·Î ³×ÀÓ¼­¹ö¸¦ ½ÃÇèÇغ¼ ÇÊ¿ä°¡ ÀÖ´Ù. ´ëºÎºÐÀÇ ½Ã½ºÅÛ¿¡ ±âº» ¼³Ä¡µÇ¾î ÀÖ´Â nslookupÀº dig¿Í ÇÔ²² °¡Àå ³Î¸® »ç¿ëµÇ´Â ³×ÀÓ¼­¹ö ÁúÀÇ µµ±¸·Î½á, µµ¸ÞÀÎ ¸Þ´ÏÀúÀÇ ±âº» ¹«±âÁß ÇϳªÀÌ´Ù.

$ nslookup
Default Server:  ns.nobreak.com
Address:  210.105.79.2
> exit

nslookupÀº ½ÇÇàÈÄ ´ëÈ­Çü ÇÁ·ÒÇÁÆ® '>'¸¦ Ç¥½ÃÇÏ°í '/etc/resolv.conf'¿¡ Á¤ÀÇµÈ Ã¹ ¹ø° ³×ÀÓ¼­¹ö¸¦ ±âº» ÁúÀÇ ¼­¹ö·Î ¼³Á¤ÇÑ´Ù. 'nslookup'Àº BIND¿Í ´Þ¸® ÇϳªÀÇ ¼­¹ö¸¸À» ÁúÀÇ¿¡ »ç¿ëÇϱ⠶§¹®¿¡ 'Default NS -> Timeout -> Error'¿Í °°ÀÌ µ¿ÀÛÇÑ´Ù.

µµ¸ÞÀÎ ³×ÀÓ °Ë»ö

nslookupÀº ±âº»ÀûÀ¸·Î ÀÔ·ÂµÈ µµ¸ÞÀο¡ ´ëÇØ A ·¹Äڵ带 °Ë»öÇÏ°í, IP ÁÖ¼Ò(in-addr.arpa)¿¡ ´ëÇؼ­´Â PTR ·¹Äڵ带 °Ë»öÇÑ´Ù. 'set type=RR' ¸í·ÉÀ¸·Î A ·¹ÄÚµå ÀÌ¿ÜÀÇ ·¹ÄÚµå ¶ÇÇÑ °Ë»öÇÒ ¼ö ÀÖÀ¸¸ç, RR(Resource Record)¿¡´Â A,ANY,CNAME,HINFO,MX,NS,PTR,SOA,TXT µîÀÌ ¿Ã ¼ö ÀÖ´Ù. ÀÌÁß ANY´Â °ü·ÃµÈ ·¹ÄÚµåµéÀ» ¸ðµÎ Ãâ·ÂÇ϶ó´Â ¾à¼Ó ±âÈ£ÀÌ´Ù.

> www.kr.freebsd.org.                 # IP °Ë»ö
Name:    www.kr.freebsd.org
Address:  150.183.110.39

> ftp.kr.freebsd.org.
Name:    www.kr.freebsd.org           # ftp´Â wwwÀÇ CNAME
Address:  150.183.110.39
Aliases:  ftp.kr.freebsd.org

> 150.183.110.39                      # µµ¸ÞÀÎ °Ë»ö
Name:    www.kr.freebsd.org
Address:  150.183.110.39

> set type=MX                         # MX ·¹ÄÚµå °Ë»ö
> kr.freebsd.org.
kr.freebsd.org  preference = 10, mail exchanger = mail.kr.freebsd.org

> set type=NS                         # NS ·¹ÄÚµå °Ë»ö
> kr.freebsd.org.                     # µµ¸ÞÀÎ À§ÀÓ È®ÀÎ
kr.freebsd.org     nameserver = ns.kr.freebsd.org
kr.freebsd.org     nameserver = ns2.kr.freebsd.org
ns.kr.freebsd.org  internet address = 150.183.110.2
ns2.kr.freebsd.org internet address = 150.183.110.3

> 46.102.39.in-addr.arpa.             # Àιö½º µµ¸ÞÀÎ À§ÀÓ È®ÀÎ
kr.freebsd.org     nameserver = ns.kr.freebsd.org
kr.freebsd.org     nameserver = ns2.kr.freebsd.org
ns.kr.freebsd.org  internet address = 150.183.110.2
ns2.kr.freebsd.org internet address = 150.183.110.3

±âº» Äõ¸® ¼­¹ö º¯°æ

nslookupÀº ±âº»ÀûÀ¸·Î recurse ¸ðµå·Î µ¿ÀÛÇϱ⠶§¹®¿¡, ¶§·Ð ÇØ´ç µµ¸ÞÀÎÀÇ Authority¸¦ °®´Â ƯÁ¤ ³×ÀÓ¼­¹ö¿¡ Á÷Á¢ ÁúÀǸ¦ ÇÏ¿© Authoritative ÀÀ´ä(³×ÀÓ¼­¹öÀÇ Ä³½¬¿¡¼­°¡ ¾Æ´Ñ)À» È®ÀÎ ÇÒ ÇÊ¿ä°¡ ÀÖ´Ù. 'server', 'lserver' ¸í·ÉÀ¸·Î ±âº» ÁúÀÇ ¼­¹ö¸¦ º¯°æ ÇÒ ¼ö ÀÖ´Ù. µÎ ¸í·ÉÀº ÁÖ¾îÁø ³×ÀÓ¼­¹öÀÇ ÁÖ¼Ò(Äõ¸®°¡ ¾Æ´Ñ)¸¦ ãÀ» ¶§ »ç¿ëÇÒ ÁúÀÇ ¼­¹öÀÇ Â÷ÀÌÀε¥, 'server'´Â ÇöÀçÀÇ ±âº» ¼­¹ö¸¦ ÅëÇÏ°í, 'lserver'´Â ½Ã½ºÅÛ ±âº» ¼­¹ö(nslookup ±¸µ¿½Ã Ãʱ⠼³Á¤µÇ´Â)¸¦ »ç¿ëÇÔÀÌ ´Ù¸£´Ù. 'lserver'¸í·ÉÀº Ÿ ³×ÀÓ¼­¹ö·Î ½ºÀ§Äª ÇÑ ÈÄ, ´Ù½Ã ´Ù¸¥ ³×ÀÓ¼­¹ö·Î ½ºÀ§ÄªÇÏ·Á Çϴµ¥, ÇöÀçÀÇ ³×ÀÓ¼­¹ö°¡ µ¿ÀÛÇÏÁö ¾Ê¾Æ ÇØ´ç ³×ÀÓ¼­¹öÀÇ ÁÖ¼Ò¸¦ °Ë»öÇÏÁö ¸øÇÒ ¶§ »ç¿ëÇÑ´Ù. ´ÙÀ½À» º¸ÀÚ.

$ nslookup
Default Server:  ns.nobreak.com
Address:  210.105.79.2

nslookup ±¸µ¿½ÃÀÇ ±âº» ¼­¹ö 'ns.nobreak.com'ÀÌ 'lserver' ¸í·É¿¡¼­ ÁÖ¾îÁø NSÀÇ ÁÖ¼Ò¸¦ ã±âÀ§ÇÑ ÁúÀÇ ¼­¹ö°¡ µÈ´Ù.

> server ns.jp.freebsd.org.        # ±âº» ¼­¹ö º¯°æ
Default Server:  ns.jp.freebsd.org
Address:  199.100.7.25

> server ns.nobreak.com.
*** Can't find address for server ns.nobreak.com: Non-existent host/domain

ns.jp.freebsd.org¸¦ ÅëÇØ ns.nobreak.comÀ» ãÀ» ¼ö°¡ ¾ø´Ù. À̶§¿¡´Â 'lserver' ¸í·ÉÀ¸·Î ½Ã½ºÅÛ ±âº» ¼­¹ö¸¦ ÅëÇØ 'ns.nobreak.com'ÀÇ ÁÖ¼Ò¸¦ °Ë»öÇÑ´Ù.

> lserver ns.nobreak.com.
Default Server:  ns.nobreak.com
Address:  210.105.79.2

·çÆ® ³×ÀÓ¼­¹ö¸¦ ÁúÀÇ ¼­¹ö·Î ÇÏ°íÀÚ ÇÒ ¶§´Â, °£´ÜÈ÷ 'root' ¸í·ÉÀ» »ç¿ëÇÒ ¼ö ÀÖ´Ù.

> root
Default Server:  a.root-servers.net
Address:  198.41.0.4

³×ÀÓ ¼­¹öó·³ ÁúÀÇÇϱâ

³×ÀÓ¼­¹ö´Â ResolverÀÇ ¿äûÀ» ó¸®Çϱâ À§ÇØ, ³×ÀÓ½ºÆäÀ̽º¸¦ °Ë»öÇϸç, ¿©·¯ ³×ÀÓ¼­¹ö¿Í Åë½ÅÀ» Çϴµ¥, nslookupÀ¸·Î µ¿ÀÏÇÑ °úÁ¤À» ¹â¾Æº¸µµ·Ï ÇÏÀÚ. ³×ÀÓ¼­¹ö°¡ ÀÎÅͳݻ󿡼­ ¾î¶»°Ô µ¿ÀÛÇϸç, ³×ÀÓ¼­¹öµé °£¿¡´Â ¾î¶² »ç°ÇµéÀÌ ¹ß»ýÇÏ°í, ¿©·¯ºÐÀ» À§ÇØ ¹«¾ùÀ» ÇÏ´ÂÁö, ±¸Ã¼ÀûÀÎ ´À³¦À» ¹ÞÀ» ¼ö ÀÖÀ» °ÍÀÌ´Ù.

[Image]
[±×¸² 7] ³×ÀÓ¼­¹öó·³ ÁúÀÇÇϱâ

  1. > set norecurse     # Iterative ¸ðµå·Î Àüȯ
    > www.kr.freebsd.org.
    Server:  ns.nobreak.com
    Address:  210.105.79.2
    
    Name:    www.kr.freebsd.org
    Served by:
    - H.ROOT-SERVERS.NET
                 128.63.2.53
                 ORG
    - B.ROOT-SERVERS.NET
                 128.9.0.107
                 ORG
             ...
    
    'ORG.'°¡ °ü¸®µÇ´Â ·çÆ® ¼­¹öµéÀÇ ¸ñ·ÏÀ» ·¹ÆÛ·±½Ì ÇØÁØ´Ù.
  2. > server h.root-servers.net.
    > www.kr.freebsd.org.
    Server:  h.root-servers.net
    Address:  128.63.2.53
    
    Name:    www.kr.freebsd.org
    Served by:
    - WHO.CDROM.COM
              204.216.27.3
              FREEBSD.ORG
    - NS1.CRL.COM
              165.113.1.36
              FREEBSD.ORG
    - NS2.CRL.COM
              165.113.61.37
              FREEBSD.ORG
    
  3. > server who.cdrom.com.
    > www.kr.freebsd.org.
    Server:  who.cdrom.com
    Address:  204.216.27.3
    
    Name:    www.kr.freebsd.org
    Served by:
    - ns.kr.freebsd.org
              150.183.110.2
              kr.freebsd.org
    - ns2.kr.freebsd.org
              150.183.110.3
              kr.freebsd.org
    
  4. > server ns.kr.freebsd.org.
    > www.kr.freebsd.org.
    Server:  ns.kr.freebsd.org
    Address:  150.183.110.2
    
    Name:    www.kr.freebsd.org
    Address:  150.183.110.39
    

Zone Transfer

ÇØ´ç µµ¸ÞÀÎÀÇ Zone¿¡ ´ëÇÑ º¹»çº»À» ¾ò±âÀ§ÇØ, Primary·ÎºÎÅÍ Zone µ¥ÀÌÅͺ£À̽º¸¦ ²ø¾î¿À´Â ÀÛ¾÷À» Zone Transfer¶ó ÇÑ´Ù. ÀÌ ÀÛ¾÷Àº ÁÖ·Î Secondary NS Ãø¿¡¼­ ÀÌ·ç¾îÁö¸ç, ¶§¶§·Î ¾ó¸¶³ª ¸¹Àº ¼öÀÇ È£½ºÆ®°¡ µî·ÏµÇ¾î ÀÖ´ÂÁö ȤÀº ZoneÀÇ ¹®¹ýÀû ¿À·ù¸¦ °Ë»çÇϱâ À§ÇØ °ü¸®ÀÚ°¡ ¼öµ¿À¸·Î Á¶ÀÛÇϱ⵵ ÇÑ´Ù. Zone Transfer´Â Authority¸¦ °®´Â ³×ÀÓ¼­¹ö¿¡ Á÷Á¢ ÁúÀÇÇÏ¿©¾ß ÇϹǷÎ, nslookup »ó¿¡¼­ ÇØ´ç NS·Î ÁúÀÇ ¼­¹ö¸¦ º¯°æÇÑÈÄ, 'ls' ¸í·ÉÀ» »ç¿ëÇÑ´Ù.

> server ns.kr.freebsd.org.
> ls -t A kr.freebsd.org      # A ·¹ÄÚµå Ãâ·Â
kr.freebsd.org.                server = ns.kr.freebsd.org
kr.freebsd.org.                server = ns2.kr.freebsd.org
mail                           150.183.110.32
mqueue                         150.183.110.33
www                            150.183.110.39
www2                           150.183.110.40

> ls -d kr.freebsd.org        # ¸ðµç ·¹ÄÚµå Ãâ·Â
kr.freebsd.org.                SOA   ns.nobreak.com hostmaster.kr.freebsd.org.
                               (1999031501 21600 1800 1209600 86400)
kr.freebsd.org.                NS    ns.nobreak.com
kr.freebsd.org.                NS    ns2.nobreak.com
kr.freebsd.org.                MX    10   mail.kr.freebsd.org
kr.freebsd.org.                MX    20   mqueue.kr.freebsd.org
cvsup                          CNAME www.kr.freebsd.org
mail                           A     150.183.110.32
mqueue                         A     150.183.110.33
ftp                            CNAME www.kr.freebsd.org
ftp2                           CNAME www2.kr.freebsd.org
ftp3                           CNAME ftp.free.nobreak.com
www                            A     150.183.110.39
www                            HINFO Pentium-200  FreeBSD 2.2.8
www                            TXT  "Korea FreeBSD Users Group"
www2                           A     150.183.110.40
www2                           HINFO Pentium-133MHz  FreeBSD 2.2.8
www2                           TXT  "Korea FreeBSD Users Group"

> ls -t MX kr.freebsd.org > MX-kr.freebsd.org   # ÆÄÀÏ·Î ÀúÀå
> view MX-kr.freebsd.org                        # ÆÄÀÏ ³»¿ë È®ÀÎ

BINDÀÇ °æ¿ì 'named-xfer'¶ó´Â ¿ÜºÎ ÇÁ·Î±×·¥À» »ç¿ëÇØ Zone Transfer¸¦ ¼öÇàÇÑ´Ù. ³×ÀÓ¼­¹öÀÇ ÀÔÀå¿¡¼­ ºÎÆ® ÆÄÀÏ¿¡ Secondary ¼³Á¤ÀÌ ÀÖÀ» °æ¿ìÀÇ Ã³¸®°úÁ¤À» »ìÆ캸ÀÚ.

secondary       kr.freebsd.org  210.105.79.2    sec-kr.freebsd.org

BIND´Â 'secondary' ¸í·ÉÀ» ¸¸³ª¸é ³»ºÎÀûÀ¸·Î ´ÙÀ½°ú °°ÀÌ µ¿ÀÛÇÑ´Ù.

loop(Interval == TTL) {
        named-xfer -z kr.freebsd.org -f /var/named/sec-kr.freebsd.org -s Current_Serial 210.105.79.2
        switch ( $? ) {      // 'named-xfer'´Â ȯ°æ º¯¼ö '$?'¿¡ °á°ú¸¦ º¹±ÍÇÔ
                case 0 : OK; // ½Ã¸®¾óÀÌ °°À½, Zone Transfer°¡ ÇÊ¿äÄ¡ ¾ÊÀ½
                case 1 : OK; // ½Ã¸®¾óÀÌ Áõ°¡ÇßÀ½, Zone Transfer°¡ ¼º°øÀûÀ¸·Î ¼öÇàµÊ
                case 2 : ERROR; // ³×ÀÓ¼­¹ö¸¦ ãÀ» ¼ö ¾øÀ½
                                // ȤÀº ³×ÀÓ¼­¹ö°¡ µµ¸ÞÀÎÀÇ Authority¸¦ °®Áö ¾ÊÀ½
                case 3 : ERROR: // ½Ã¸®¾óÀÌ °¨¼ÒÇßÀ½, ±âÁ¸ÀÇ ¹é¾÷Ä«ÇÇ À¯Áö
        }
        primary  kr.freebsd.org  sec-kr.freebsd.org
}

º¸¾ÈÀÇ ÀÌÀ¯·Î Çã¶ôµÈ °÷(¿¹: Secondary NS's IP)¿¡¼­¸¸ Zone Transfer¸¦ Çã¿ëÇÏ°íÀÚ ÇÑ´Ù¸é, Primary NSÀÇ ºÎÆ®ÆÄÀÏ¿¡ ´ÙÀ½°ú °°Àº ¿É¼ÇÀ» ÁØ´Ù. (Zone Transfer¸¸À» Á¦ÇÑÇÏ´Â °ÍÀ̱⠶§¹®¿¡, È£½ºÆ®¿¡ ´ëÇÑ °³º° Äõ¸®´Â Çã¿ëµÈ´Ù)

xfrnets  210.105.79.3&255.255.255.255  210.105.80.128&255.255.255.128

ÀÌ°ÍÀº BIND-4ÀÇ ¼³Á¤¿¹Àε¥, IP 210.105.79.3°ú 210.105.80.129-254 ¿¡¼­¸¸ Zone Transfer¸¦ Çã¿ëÇ϶ó´Â ÀǹÌÀÌ´Ù. BIND-4¿¡¼­´Â °³º° IP¿Í ¼­ºê³ÝÀ¸·Î ³ª´©¾îÁø ºí·°¿¡ ´ëÇØ ``IP&Mask''ÀÇ Çü½ÄÀ¸·Î ¸ñ·ÏÀ» ÀÛ¼ºÇϸç, Ŭ·¡½º Àüü¸¦ Çã¿ëÇÏ°íÀÚ ÇÒ °æ¿ì¿£ '210.105.79.0'°ú °°ÀÌ ¸¶½ºÅ©¸¦ »ý·«ÇÏ¿©µµ µÈ´Ù.

options {
        allow-transfer { localnets; 210.105.79.3; };
};

BIND-8ÀÇ °æ¿ì¿¡ ÇØ´ç ¼­¹ö°¡ ¼ÓÇÑ ³×Æ®¿öÅ©¿Í, 210.105.79.3¸¸À» Çã¿ëÇÑ ¿¹ÀÌ´Ù. localnets´Â ¿¹¾à¾îÀÌ¸ç ´Ù¸¥ ¿¹¾à¾î·Î´Â any, none, localhost °¡ ÀÖ´Ù.

ÃʱâÈ­ ÆÄÀÏ '.nslookuprc'

nslookupÀº ½ÇÇà½Ã '~/.nslookuprc' ÆÄÀÏÀÌ Á¸ÀçÇϸé, ³»¿ëÀ» ÀÐ¾î ¿É¼ÇÀ» Á¶Á¤ÇÑ´Ù. ¸Å¹ø ¼³Á¤ÇÏ´Â ¿É¼ÇÀÌ ÀÖ´Ù¸é, º» ÆÄÀÏÀ» ÅëÇØ °£ÆíÈ­ÇÒ ¼ö ÀÖ°Ú´Ù.

* .nslookuprc ÆÄÀÏ ¿¹
set type=NS
set nosearch
set debug

7.2 DIG

Dig(Domain Information Groper)ÀÇ »ç¿ë¹ýÀ» Á¶±Ý¸¸ ¤¾îº¸µµ·Ï ÇÏÀÚ. 'nslookup'°úÀÇ ±â´ÉÀû Â÷ÀÌ´Â Å©°Ô ¾øÁö¸¸, »ç¿ëÀÌ °£°áÇÏ°í, Ãâ·ÂÀÌ »ó¼¼ÇÏ¿©, Shell Scriptµî¿¡¼­ ÁÖ·Î »ç¿ëµÈ´Ù. ´ÙÀ½Àº ns.kornet.ne.krÀ» ÅëÇØ www.nobreak.comÀÇ A ·¹Äڵ带 °Ë»öÇÑ °á°úÀÌ´Ù.

$ dig [@³×ÀÓ¼­¹ö] µµ¸ÞÀÎ [Äõ¸®Å¸ÀÔ] [+Äõ¸®¿É¼Ç]
$ dig  @ns.kornet.ne.kr  www.nobreak.com  A
;; ANSWER SECTION:
www.nobreak.com.        16h12m36s IN CNAME  ns.nobreak.com.
ns.nobreak.com.         1d19h12m27s IN A  210.105.79.2
;; AUTHORITY SECTION:
nobreak.com.            22h17m35s IN NS  ns.nobreak.com.
nobreak.com.            22h17m35s IN NS  ns2.nobreak.com.
;; ADDITIONAL SECTION:
ns.nobreak.com.         1d19h12m27s IN A  210.105.79.2
ns2.nobreak.com.        1d1h46m58s IN A  210.105.79.3

DIG´Â Äõ¸®¿¡ ´ëÇÑ °á°ú¸¦ ANSWER SECTION¿¡, ÇØ´ç µµ¸ÞÀÎÀÇ ÀÎÁõÀ» °®´Â ³×ÀÓ¼­¹ö Á¤º¸¸¦ AUTHORITY SECTION¿¡, ±×¸®°í, ±Û·ç·¹ÄÚµå µîÀÌ ÀÖÀ» °æ¿ì ±×¿¡´ëÇÑ Á¤º¸¸¦ ADDITIONAL SECTION¿¡ Ãâ·ÂÇÏ¿© ÁØ´Ù.

7.3 DNSWALK

Dnswalk´Â Perl·Î Á¦ÀÛµÈ ½ºÅ©¸³Æ®·Î½á Á¸ÀçÇÏÁö ¾Ê´Â È£½ºÆ®¸¦ °¡¸£Å°´Â MX, PTRÀÌ ¾ø´Â A, À߸øµÈ CNAME, À¯È¿ÇÏÁö ¾ÊÀº À̸§¹®ÀÚ, ´©¶ôµÈ Æ®·¹Àϸµ µµÆ®, ºÒÇʿ䳪 ±Û·ç ·¹ÄÚµå, Lame Delegation µî Zone µ¥ÀÌÅͺ£À̽ºÀÇ ´Ù¾çÇÑ ¿À·ù¸¦ ã¾ÆÁØ´Ù. ¹Ìó ¹ß°ßÄ¡ ¸øÇÑ ¹®Á¦Á¡À» Áø´ÜÇϴµ¥ µµ¿òÀÌ µÉ °ÍÀÌ´Ù. DnswalkÀÇ ÃֽŠ¹öÁ¯Àº ´ÙÀ½ ÁÖ¼Ò¿¡¼­ ¾òÀ» ¼ö ÀÖ´Ù.

$ dnswalk -raFl freebsd.org.
Checking freebsd.org.
Getting zone transfer of freebsd.org. from ns2.iafrica.com...done.
SOA=implode.root.com    contact=hostmaster.freebsd.org
FAIL: Cannot get SOA record for pt.freebsd.org from zeus.ci.ua.pt
(lame?): Connection refused
BAD: lv.freebsd.org NS ns.fasts.com: lame NS delegation
BAD: eu.freebsd.org NS server.zsb.th-darmstadt.de: unknown host
WARN: irc3.freebsd.org CNAME irc.nocturnal.net: CNAME (to nocturnal.net)
WARN: ns.th.freebsd.org A 203.154.230.20: no PTR record
WARN: irc2.freebsd.org CNAME va.i-Plus.net: unknown host
1 failures, 3 warnings, 1 errors.

Dnswalk´Â °Ë»ç¸¦ ¼öÇàÇϱâ À§ÇØ ÇØ´ç µµ¸ÞÀÎÀ» Zone Transfer ÇÑ ÈÄ ³»ºÎÀûÀ¸·Î Dig¿Í Resolver ·çƾÀ» »ç¿ëÇÑ´Ù. DelegationµÈ µµ¸ÞÀÎÀ» µû¶ó°¡¸ç °Ë»ç¸¦ ÇàÇϱ⠶§¹®¿¡ °Å´ë µµ¸ÞÀÎÀ» °ü¸®ÇÑ´Ù¸é ÇѹøÂë »ç¿ëÇغ½Á÷ ÇÏ´Ù.


´ÙÀ½ ÀÌÀü Â÷·Ê