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  ¸ÞÀÏÁÖ¼Ò º¯Á¶´Â no, SPF(Sender Policy Framework)±â¼ú¿¡ ´ëÇØ ÀÛ¼ºÀÏ : 2005/08/03 15:44
 
  • ±Û¾´ÀÌ : ÁÁÀºÁøÈ£ ( http://coffeenix.net/ )
  • Á¶È¸¼ö : 16872
          [ ÀÌÀüÈ­¸é / ¼öÁ¤ ]   ºñ¹Ð¹øÈ£ :     Àμâ¿ë È­¸é
      Á¦  ¸ñ : ¸ÞÀÏÁÖ¼Ò º¯Á¶´Â no, SPF(Sender Policy Framework)±â¼ú¿¡ ´ëÇØ
    ÀÛ¼ºÀÚ : ÁÁÀºÁøÈ£(truefeel, http://coffeenix.net/ )
    ÀÛ¼ºÀÏ : 2005.8.3(¼ö) ¿ÀÈÄ


    »óÄèÇÑ ¾Æħ¿¡ ½ºÆÔ¸ÞÀÏ·Î °¡µæÂù ¸ÞÀÏÇÔÀ» ¿­ ¶§ ¸¶´Ù Ŭ¸¯°ú »èÁ¦ÀÇ ¹Ýº¹À¸·Î Â¥Áõ³­ ÇϷ縦 ½ÃÀÛÇÑ ÀûÀº ¾ø´ÂÁö?

    - Antivirus
    - RBL, SURBL
    - procmail, byspamÅëÇÑ ½ºÆÔÇÊÅ͸µ
    - joe job attack¿¡ ´ëÇÑ ¹æ¾î ¼³Á¤
    - spamassassinÈ°¿ëÇÑ Á¡¼öÁ¦ ¸ÞÀÏ ÇÊÅ͸µ

    µî ´Ù¾çÇÑ ¹æ¹ýµé·Î ¸ÞÀÏ ÇÊÅ͸µÀ» Çϴµ¥ ¿À´ÃÀº SPF¿¡ ´ëÇØ ¾Ë¾Æº¸°Ú´Ù.

    1. SPF(Sender Policy Framework)¶õ

    10°³ÀÇ Æ÷ÅлçÀÌÆ®°¡ SPF±â¼úÀ» ÅëÇؼ­ ½ºÆÔ¸ÞÀÏÀ» ÇÊÅ͸µÇÒ °èȹÀ̶ó´Â ¿À´ÃÀÚ ±â»ç¸¦ ºÃ´Ù.
    Meng Weng Wong¿¡ ÀÇÇØ 2003³â¿¡ ½ÃÀÛµÈ SPF±â¼úÀº ¸ÞÀÏÀÇ Çì´õ¸¦ º¸°í ½ÇÁ¦ ÇØ´ç ¸ÞÀϼ­¹ö¿¡¼­ º¸³»Áø
    °ÍÀÎÁö¸¦ ÆÇ´ÜÇÏ¿© ¸ÞÀÏ ¼ö½ÅÀ» ¸·´Â ¹æ¹ýÀÌ´Ù.

    ¿¹¸¦ µé¾î
    ¸ÞÀÏÀÇ From Çì´õ¿¡ foo@spammer.com ¶ó°í ÀûÇôÀÖÀ¸¸é
    spammer.com À» °ü¸®ÇÏ´Â DNS¸¦ ÅëÇؼ­
    ÇØ´ç ¸ÞÀÏÀÌ ½ÇÁ¦ spammer.com¿¡¼­ ¼³Á¤ÇÑ IP¿Í ¼ö½ÅµÈ ¸ÞÀÏÇì´õÀÇ IP¿Í ºñ±³Çؼ­ ´Ù¸£¸é ¼ö½ÅÀ» °ÅºÎÇÏ°Ô
    µÈ´Ù. Áï, ½ÇÁ¦·Î hanmail.net¿¡¼­ º¸³»Áö ¾ÊÁö ¾Ê¾ÒÀ¸¸é¼­ ¸ÞÀÏÁÖ¼Ò´Â @hanmail.net ·Î ¼Ó¿©¼­ ¹ß¼ÛµÇ´Â
    ¸ÞÀÏÀº ÇÊÅ͸µÀÌ °¡´ÉÇÏ°Ô µÇ´Â °ÍÀÌ´Ù.

    »çÁøÃâó : http://pm-lib.sourceforge.net/


    2. SPF ±â¼ú Àû¿ëÀ§ÇÑ DNS ¼³Á¤

    SPF ±â¼úÀ» Àû¿ëÇϱâ À§Çؼ­´Â ¸ÞÀϼ­¹ö¸¦ ¿î¿µÁßÀÎ »çÀÌÆ®ÀÇ DNS¿¡´Â TXT ·¹ÄÚµå ¼³Á¤ÀÌ ÇÊ¿äÇÏ´Ù.
    ÀÌ ¼³Á¤Àº ´Ù¸¥ ¸ÞÀϼö½Å¼­¹öµé¿¡°Ô SPFÁ¤Ã¥À» ÅëÇØ ¸ÞÀÏÀ» ÇÊÅ͸µÇϵµ·Ï µµ¿òÀ» ÁÖ±âÀ§ÇÑ ¼³Á¤ÀÌÁö
    º»ÀÎÀÇ ¸ÞÀϼ­¹ö·Î ¼ö½ÅµÈ ¸ÞÀÏÀÌ ÇÊÅ͸µµÇµµ·Ï ¼³Á¤ÇÏ´Â °ÍÀÌ ¾Æ´Ï´Ï, DNS ¼³Á¤Çß´Ù°í '¾î~ ÇÊÅ͸µÀÌ
    ¾ÈµÇÁö'ÇÏ°í Çê»ðÁýÇÏÁö ¸»±â ¹Ù¶õ´Ù.

    SPF ±â¼úÀ» Àû¿ëÇÏ°Ú´Ù°í º¸µµµÈ 10°³ÀÇ Æ÷ÅÐ »çÀÌÆ®¿¡ ´ëÇØ DNS ¼³Á¤À» È®ÀÎÇÑ °á°ú 5°÷ÀÇ DNS¿¡´Â
    ÀÌ¹Ì TXT ¼³Á¤ÀÌ µÇ¾î ÀÖ¾ú´Ù.

    ¡Ø 10°³ Æ÷ÅÐ »çÀÌÆ®
       nownuri.net, hanmail.net, chol.com, dreamwiz.com, empas.com(empal.com),
       korea.com, hotmail.com, paran.com, naver.com, nate.com

     
    # dig txt µµ¸ÞÀÎ
     


     
    ;; ANSWER SECTION:
    korea.com.              1759    IN      TXT     "v=spf1 mx ip4:210.117.14.85 ip4:211.109.1.111
    ip4:211.109.1.113 ip4:211.109.1.114 ip4:211.109.1.115 ip4:211.109.1.151 ip4:211.109.1.152
    ip4:211.109.11.35 ip4:211.109.11.40 ip4:211.109.2.50 ip4:211.109.2.51 ~all"

    ;; ANSWER SECTION:
    nownuri.net.            10800   IN      TXT     "v=spf1 a:203.238.128.57 a:203.238.128.90 ~all"

    ;; ANSWER SECTION:
    chol.com.               3600    IN      TXT     "v=spf1 ip4:203.252.3.0/24 ~all"

    ;; ANSWER SECTION:
    dreamwiz.com.           900     IN      TXT     "v=spf1 ip4:211.39.128.0/24 a mx ptr ~all"

    ;; ANSWER SECTION:
    hotmail.com.            3600    IN      TXT     "v=spf1 include:spf-a.hotmail.com include:spf-b.hotmail.com

    include:spf-c.hotmail.com include:spf-d.hotmail.com ~all"

    ;; ANSWER SECTION:
    spf-a.hotmail.com.      2590    IN      TXT     "v=spf1 ip4:209.240.192.0/19 ip4:65.52.0.0/14
    ip4:131.107.0.0/16 ip4:157.54.0.0/15 ip4:157.56.0.0/14 ip4:157.60.0.0/16 ip4:167.220.0.0/16
    ip4:204.79.135.0/24 ip4:204.79.188.0/24 ip4:204.79.252.0/24 ip4:207.46.0.0/16 ip4:199.2.137.0/24 ~all"
     


    Àú ¼³Á¤À» º¸°í ¾î¶»°Ô TXT¸¦ ¼³Á¤ÇؾßÇÏ´ÂÁö ´«Ä¡¸¦ ëÀ» °ÍÀÌ´Ù.

    ----------  ---------------------------------------------------------------------------
    methods     ¼³  ¸í
    ----------  ---------------------------------------------------------------------------
    v=spf1      SPFÀÇ ¹öÀü
    ip4         ¸ÞÀÏÀ» ¼Û½ÅÇÏ´Â IPÁÖ¼Òµé. 211.39.128.0/24ó·³ CIDRÇüÅ·Πǥ½Ã °¡´É
    a           DNSÀÇ A  ·¹ÄÚµå·Î ¼³Á¤ÇÑ IPÁÖ¼Ò¸¦ sender·Î ¼³Á¤
                ¿¹¸¦ µé¾î dreamwiz.com¶ó¸é
                dreamwiz.comÀÇ IP 211.39.128.129¿Í 211.39.128.129À» sender·Î ÆÇ´ÜÇÔÀ» ÀǹÌ
                a:foo.com ó·³ µµ¸ÞÀÎÀ» ÁöÁ¤ÇÒ ¼öµµ ÀÖ´Ù.
    mx          MX ·¹Äڵ忡 ÁöÁ¤ÇÑ IPÁÖ¼ÒµéÀ» sender·Î ÆÇ´ÜÇ϶ó´Â ÀǹÌ
    ptr         IP¿¡ ´ëÇØ lookupÀ» ÇÏ¿© PTR ·¹Äڵ忡 ÁöÁ¤µÇ¾î ÀÖÀ¸¸é sender·Î ÆÇ´ÜÇ϶ó´Â ÀǹÌ
    include     ÁöÁ¤ÇÑ µµ¸ÞÀÎÀÇ TXT ·¹Äڵ忡¼­ ¼³Á¤À» ã´Â´Ù.
    ~all        ÀÌ method´Â TXT ·¹ÄÚµåÀÇ ³¡¿¡ ³Ö¾îÁֱ⠹ٶõ´Ù.
    ----------  ---------------------------------------------------------------------------

    º¸´Ù ÀÚ¼¼ÇÑ »çÇ×Àº http://spf.pobox.com/mechanisms.html ¸¦ ÂüÁ¶Çϱ⠹ٶõ´Ù.

    3. °ü·Ã »çÀÌÆ®

    * SPF
      http://spf.pobox.com/
      http://spf.pobox.com/faq.html

    * SPF Mechanisms
      http://spf.pobox.com/mechanisms.html

    * An Overview of the Sender Policy Framework
      http://www.msexchange.org/tutorials/Sender-Policy-Framework.html

    * SPF±â¼úÀ» À§ÇÑ DNS ¼³Á¤
      http://www.petri.co.il/sender_policy_framework.htm

    * SPF Council (SPF ±â¼ú, Ç¥ÁØ¿¡ ´ëÇØ ³íÀÇ)
      http://spf.mehnle.net/Home_Page

    * SPF Å×½ºÆ®
      http://www.schlitt.net/spf/tests/

    * Domain Registrars and DNS Providers that Support SPF
      http://www.kitterman.com/spf/txt.html

    * sendmail¿¡¼­ SPF¸¦ À§ÇÑ ¼³Á¤(Milter-SPF ¼³Ä¡ ¹æ¹ý)
      http://spf.pobox.com/sendmail-milter-INSTALL.txt
      http://www.brandonhutchinson.com/Installing_Milter-SPF_with_Sendmail.html

      Ä¿ÇǴнº Ä«Æä ÃÖ±Ù ±Û
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    [ ÇÔ²²ÇÏ´Â »çÀÌÆ® ]




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