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À¥¼­¹ö »ç¿ë Åë°è ÀÚ·á (2, ÀÚ·á 1)
Apache SSL / mod_ssl (4, ±Û 3, ÀÚ·á 2)

  ApacheÀÇ chroot¿î¿µ ¹× Jail System ÀÛ¼ºÀÏ : 2003/08/30 20:58
 
  • ±Û¾´ÀÌ : EcusE ( http://free4u.dnip.net )
  • Á¶È¸¼ö : 5965
          [ ÀÌÀüÈ­¸é / ¼öÁ¤ ]   ºñ¹Ð¹øÈ£ :     Àμâ¿ë È­¸é
      1.¼Ò°³


    ¾ÆÆÄÄ¡¸¦ chrootÇÏ¿¡ ¿î¿µÇÏ´Â ¹æ¹ýÀº ¸î°¡Áö°¡ ÀÖÁö¸¸ ¿©±â¿¡¼±
    ¾ÆÆÄÄ¡ ¼Ò½º¿¡ ÆÐÄ¡¸¦ Çؼ­ chroot¸¦ Àû¿ëÇÏ´Â ¹æ¹ý¿¡´ëÇØ ±â¼úÇÏ°íÀÖ´Ù.
    *nix¿¡¼­ ¿î¿µµÇ´Â °¢Á¾ µ¥¸óµé(ftpd, named, etc)ÀÌ chroot¸¦Àû¿ëÇØ
    ¿î¿µµÇ´Â Ãß¼¼·Î º¸ÀδÙ.
    À¥¼­¹öÀÇ º¸¾È Ãë¾àÁ¡°ú chroot¿¡ °üÇÑ°ÍÀº plusÀÇ ¹®¼­¸¦ Âü°íÇϱâ¹Ù¶õ´Ù.
    http://www.plus.or.kr/book/SecurityPLUS-2nd/node10.html


    ´Ù¸¥¹æ¹ýÀ¸·Î chroot¸¦ Àû¿ëÇÏ´Â ¹æ¹ýÀº ¾Æ·¡¸µÅ©¸¦ Âü°íÇϱ⠹ٶõ´Ù.
    http://www.linuxfocus.org/English/January2002/article225.shtml
    http://www.networkdweebs.com/chroot.html


    ½Ã½ºÅÛÀ» chroot»óÅ·Π¿î¿µÇÏ´Â jailÇÁ·ÎÁ§Æ®¿Í apache¸¦ chrootÀû¿ë½ÃÄÑ
    °°ÀÌ ¿î¿µÇÑ´Ù¸é Á»´õ ¾ÈÀüÇÑ ¼­¹ö¿î¿µÀÌ µÉ°ÍÀ¸·Î »ý°¢µÈ´Ù.

    jail project
    http://free4u.dnip.net/weblog/stories.php?story=01/10/24/5067801



    2.ÆÐÄ¡ÆÄÀÏ ´Ù¿î·Îµå


    ÆÐÄ¡´Ù¿î·Îµå »çÀÌÆ® - http://home.iae.nl/users/devet/apache/chroot/

    À§»çÀÌÆ®ÀÇ ÆÐÄ¡´Â apache-1.3.26¹öÀü¿ëÀÌÁö¸¸ ¹öÀü¿¡ »ó°ü¾øÀÌ(1.3.x´ë)
    ÆÐÄ¡°¡ Àû¿ëµÇ´Â ÆÐÄ¡ÆÄÀϵµ ÀÖÀ¸´Ï ±×°ÍÀ» ¹Þ±â¹Ù¶õ´Ù.

    apache-1.3.26¿ë ÆÐÄ¡
    http://home.iae.nl/users/devet/apache/chroot/apache_1.3.26.chroot.patch
    (À§ÀÇ °æ·Î¿¡¼­ ¹Þ±â°¡ Èûµé´Ù¸é ¾Æ·¡°æ·Î¿¡¼­ ¹ÞÀ» ¼ö ÀÖ´Ù.)
    http://free4u.dnip.net/docs/apache/apache_1.3.26.chroot.patch

    ±âŸ ¹öÀü¿ë ÆÐÄ¡
    http://home.iae.nl/users/devet/apache/chroot/patch-zz
    (À§ÀÇ °æ·Î¿¡¼­ ¹Þ±â°¡ Èûµé´Ù¸é ¾Æ·¡°æ·Î¿¡¼­ ¹ÞÀ» ¼ö ÀÖ´Ù.)
    http://free4u.dnip.net/docs/apache/patch-zz



    3.¼³Ä¡

    ÀÏ´Ü apache, phpÀÇ ¼Ò½º¸¦ Àû´çÇÑ µð·ºÅ丮¿¡ Ç®¾î³õ´Â´Ù
    ¿©±â¿¡¼± /www¸¦ ¿¹·Îµé°Ú´Ù.
    #pwd
    /www/src
    phpinfoµî¿¡¼­ ¾ÆÆÄÄ¡ ¹öÀüµîÀ» ¼û±â·Á¸éapache¼Ò½ºµð·ºÅ丮ÀÇ À̸§À»
    º¯°æÇϸéµÈ´Ù.(ex httpd, webserver)
    ±×¸®°í apacheµ¥¸ó ÀÚüÀÇ À̸§°ú ¹öÀüµîÀ» ¼û±â°Å³ª º¯Á¶ÇÏ·Á¸é
    ¾Æ·¡¸µÅ©¸¦ Âü°íÇ϶ó.
    http://free4u.dnip.net/weblog/stories.php?story=01/08/08/6470343

    ÇÊ¿ä¿¡ µû¶ó¼­ phpÀÇ ¹öÀüµµ ¼û±â°Å³ª º¯Á¶ÇÒ¼öÀÖ´Ù.
    /www/src/php/main/php_version.h¿­¾î¼­ Àû´çÈ÷ ¼öÁ¤ÇϸéµÈ´Ù.
    ÀÌÁ¦ apache¼Ò½º¿¡ ÆÐÄ¡¸¦ ÇÑ´Ù.

    /www/src/apacheµð·ºÅ丮¿¡ patch-zz¸¦ ¿Å°Ü³õ°í(1.3.26¿ëµµ °°´Ù)
    patch -p0 < patch-zz ¸í·ÉÀ¸·Î ÆÐÄ¡¸¦ ÇÑµÚ ¿¡·¯(rejectµî)°¡ ³ª´ÂÁö È®ÀÎÇÑ´Ù.
    ¸î¸î hunk°¡ ³ª´Âµ¥ º°¹®Á¦´Â ¾ø´Ù.

    ¿©±â¼­ºÎÅÍ´Â ÀϹÝÀûÀÎ apache, php, mysqlÀÇ ¼Ò½ºÄÄÆÄÀÏ ÀÛ¾÷°ú °°ÀÌ
    ¼³Ä¡ÀÛ¾÷À» ÇÏ¸é µÈ´Ù.


    3°¡Áö ¸ðµÎ ¼³Ä¡°¡ ³¡³µÀ¸¸é apache configure½Ã prefix·Î ÁöÁ¤ÇÑ
    µð·ºÅ丮ÀÇ conf/httpd.confÆÄÀÏÀ» ¿­¾î¼­ ¾Æ·¡¿Í °°Àº ¼³Á¤ÀÌ ÀÖ´ÂÁö
    È®ÀÎÇÑ´Ù.

    4. ȯ°æ¼³Á¤

    #file httpd.conf
    # ChrootDir: The directory to chroot to
    #
    # NOTE: When using this all directory/file references in DocumentRoot,
    # and should be relative to this ChrootDir!
    #
    #ChrootDir "/some/path"

    À§ÀÇ ¼³Á¤¿¡¼­ ÁÖ¼®À» Ç®°í (¿©±â¿¡¼± /www/¸¦ chrootµð·ºÅ丮·Î ¿¹¸¦µç´Ù)
    ChrootDir "/www"
    ServerRoot "/www/httpd" ·Î ¼³Á¤À» Çß´Ù¸é apache°¡ ÀνÄÇÏ´Â ½Ã½ºÅÛ "/"´Â
    "/www"·Î ´ëüµÈ´Ù. ¶ÇÇÑ ServerRoot¿ª½Ã /www/httpd·Î ¼³Á¤

    DocumentRoot "/www/httpd/htdocs"¿Í °°ÀÌ /chroot_fir/serverroot_dir/htdocs
    ÀÇ°æ·Î·Î ÀνÄÇÏ°Ô ¼³Á¤ÀÌ µÈ´Ù.
    ´ç¿¬È÷ html¹®¼­ÀÇ ¸µÅ©µîÀº ½Ã½ºÅÛ·çÆ®·Î ¼³Á¤ÇÏ¸é ¾ÈµÈ´Ù. chrootµð·ºÅ丮ÀÎ
    /www¸¦ ¹þ¾î³¯¼ö°¡ ¾ø±â¶§¹®ÀÌ´Ù.

    ¸ðµç html,phpµîÀÇ ¸µÅ©, includeµîÀº chroot_dirÀÎ /www/httpd/htdocsÀÌÇϸ¸
    Á¤»óÀûÀ¸·Î µ¿ÀÛÇϰԵȴÙ.


    #php.ini¼³Á¤

    php.ini¿¡ zendoptimizer,phpaµîÀ» ¼³Ä¡ÇØ»ç¿ëÇß¾ú´Ù¸é
    /www/libµîÀÇ µð·ºÅ丮¸¦ ¸¸µé°í php.ini¿¡¼­ °æ·Î¸¦ ¼öÁ¤ÇÏ¸é µ¿ÀÛÇÒ°ÍÀÌ´Ù.
    php¿ª½Ã apacheÀÇmodule·Î µ¿ÀÛÀ» ÇϰԵǾ ½Ã½ºÅÛ "/"¿¡´Â Á¢±ÙÇÒ¼ö°¡ ¾ø°í
    "/www"¸¦ ½Ã½ºÅÛ "/"·Î ÀνÄÇϰԵȴÙ.

    ¾Æ·¡ZendOptimizer¼³Á¤¿¡¼­ "/Zend" ´Â /www/Zend°¡ µÉ°ÍÀÌ´Ù.
    zend_extension=/Zend/lib/ZendOptimizer.so

    ±âÁ¸¿¡ jail½Ã½ºÅÛÀ» ¼³Ä¡Çؼ­ ¿î¿µÇß´Ù¸é
    jail¼³Ä¡½Ã ¼³Á¤ÇÑ chrootµð·ºÅ丮¿Í chrootÆÐÄ¡µÈapacheÀÇ ½Ã½ºÅÛ·çÆ®¸¦
    °°°Ô ¼³Á¤ÇÑ´Ù¸é À¯Àú¿Í À¥¼­¹ö ¸ðµÎ chrootµÈ »óÅ·ΠÁ»´õ ¾ÈÀüÇÑ
    ½Ã½ºÅÛ ¿î¿µÀÌ °¡´ÉÇÒ°ÍÀÌ´Ù.

    ±âÁ¸ jail½Ã½ºÅÛ°ú apache, php, mysqlÀ» ÅëÇտ½Ã
    mysqldÀÇ sockÆÄÀÏÀÇ À§Ä¡°¡ Áß¿äÇѵ¥ ÀÏ´Ü ¾ÆÆÄÄ¡°¡ Á¢±Ù°¡´ÉÇÑ°÷¿¡
    ¼ÒÄÏÆÄÀÏÀÌ À§Ä¡ÇؾßÇÑ´Ù.
    apacheÀÇ chrootµð·ºÅ丮ÀÎ /www/tmpµîÀÌ Àû´çÇÏ´Ù.
    ±âÁ¸¿¡ »ç¿ëÇÏ´ø my.cnfÆÄÀÏÀ» /www/etc/¿¡ Ä«ÇÇÈÄ ±âÁ¸ÀÇ mysqldÀÇ starting
    script¸¦ ¿­¾î ±âÁ¸°æ·ÎÀÇ °ÍÀ» /www/mysql·Î ¼öÁ¤ÈÄ ½ÇÇàÇÏ°í
    mysqlµ¥¸óÀÌ ½ÇÇàµÇÁö ¸øÇÏ°í Áװųª ÇÑ´Ù¸é /www/mysql/data/*.logÆÄÀϵîÀ»
    È®ÀÎÇؼ­ ¹®Á¦¸¦ ÇØ°áÇؾßÇÏ°Ú´Ù.

    /www/etc/my.cnf¿¹Á¦´Â ¾Æ·¡¸¦ Âü°íÇ϶ó.
    ###########################################################
    [client]
    password =
    port = 3306 #ÇÊ¿ä¿¡ ÀÇÇØ Æ÷Æ®´Â º¯°æÇÒ¼öÀÖ´Ù.
    socket = /www/var/lock/mysql.sock

    [mysqld]
    password =
    port = 3306
    socket = /www/var/lock/mysql.sock
    ##########################################################

    ±×¸®°í ±âÁ¸ÀÇ À¥º¸µåµîµµ ¼³Á¤ÆÄÀÏ¿¡¼­ mysql.sockÆÄÀÏÀÇ À§Ä¡¸¦ ¼öÁ¤Çؾß
    mysql db¸¦ »ç¿ëÇÒ¼ö ÀÖÀ»°ÍÀÌ´Ù.
    À§ÀÇ ¼³Á¤¿¡¼­ °¢ À¥º¸µåÀÇ ¼ÒÄÏÀ§Ä¡ °æ·Î´Â
    :/www/var/lock/mysql.sockÀÌ µÉ°ÍÀÌ´Ù.
    ----------------------------------------------------------
    ¿©±âºÎÅÍ´Â jail½Ã½ºÅÛÀ» ¿î¿µÇϸ鼭 chrootµÈ apache¿Í °°ÀÌ ¿î¿µÇÒ¶§ÀÇ
    ¼³Á¤À» ¾ê±âÇÏ°Ú´Ù.

    À¥º¸µå(jsboard, zeroboard, etc) ȤÀº phpÀÇ mail()ÇÔ¼ö »ç¿ë½Ã ¸ÞÀÏÀÌ
    Á¤»óÀûÀ¸·Î º¸³»ÁöÁö ¾Ê´Â´Ù.

    php°¡ ½Ã½ºÅÛ¿¡ ¼³Ä¡µÈ sendmailÀ» ÀÚµ¿À¸·Î ¼³Á¤Çؼ­ sendmailÀ» ½ÇÇàÇϴµ¥
    ½Ã½ºÅÛÀÇ sendmailÀ§Ä¡´Â /usr/sbinÀ̱⶧¹®¿¡ /www/usr/sbinµð·ºÅ丮¸¦ ¸¸µé°í
    sendmailÀÌ Á¤»ó½ÇÇà°¡´ÉÇϵµ·Ï sendmail, ¶óÀ̺귯¸®¿Í ¼³Á¤ÆÄÀϵéÀ» Ä«ÇÇÇؾßÇÑ´Ù.
    ldd /usr/sbin/sendmail ¸í·ÉÀ¸·Î sendmail½ÇÇàÆÄÀÏÀÌ ÂüÁ¶ÇÏ´Â
    °øÀ¯ ¶óÀ̺귯¸®¸¦Ã£´Â´Ù.
    ´ÙÀ½°ú ºñ½ÁÇÑ ¸Þ¼¼Áö¸¦ º¸¿©ÁÙ°ÍÀÌ´Ù.

    [root@free4u:/]#ldd /usr/sbin/sendmail
    libnsl.so.1 => /lib/libnsl.so.1 (0x40020000)
    libsasl.so.7 => /usr/lib/libsasl.so.7 (0x40036000)
    libgdbm.so.2 => /usr/lib/libgdbm.so.2 (0x40040000)
    libdb-3.1.so => /lib/libdb-3.1.so (0x40046000)
    libresolv.so.2 => /lib/libresolv.so.2 (0x400bf000)
    libcrypt.so.1 => /lib/libcrypt.so.1 (0x400d1000)
    libdl.so.2 => /lib/libdl.so.2 (0x400ff000)
    libc.so.6 => /lib/i686/libc.so.6 (0x40103000)
    libpam.so.0 => /lib/libpam.so.0 (0x4023f000)
    /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x40000000)

    ÀÌÁ¦ /wwwµð·ºÅ丮¾Æ·¡¿¡ ¿ø·¡ÀÇ ½Ã½ºÅÛ°ú °°ÀÌ /etc, /lib, /usr, /usr/bin,
    /usr/sbinµîÀÇ µð·ºÅ丮¸¦ ¸¸µç´Ù(jail½Ã½ºÅÛÀ» ¼³Ä¡Çß´Ù¸é ÀÌ¹Ì ¸¸µé¾îÁ®
    ÀÖÀ»°ÍÀÌ´Ù.¹°·Ð jail½Ã½ºÅÛ ¿î¿µ¿¡ ÇÊ¿äÇÑ ÆÄÀϵ鵵 Ä«ÇÇ°¡ µÇ¾îÀÖÀ»°ÍÀÌ´Ù.)

    Â÷·Ê´ë·Î ¿ø·¡ÀÇ ½Ã½ºÅÛ °æ·Î¿Í °°ÀÌ /www/lib/, /www/usr/libµî¿¡ ¶óÀ̺귯¸®¸¦
    Ä«ÇÇÇÑ´Ù.
    ¶óÀ̺귯¸®Ä«ÇÇ°¡ ³¡³µ´Ù¸é sendmailÀÌ Á¤»óÀûÀ¸·Î ½ÇÇàµÉ¼öÀÖµµ·Ï
    sendmailÀÌ ÂüÁ¶ÇÏ´Â /etc/mail µð·ºÅ丮¸¦ /www/etc/mailµð·ºÅ丮·Î
    Ä«ÇÇÇÑ´Ù.±×¸®°í /etc/passwd¿¡¼­ mailÀ¯Àú¿¡ ÇØ´çÇÏ´Â Çʵ带 º¹»çÇؼ­
    /www/etc/passwd¿¡ Ãß°¡ÇÑ´Ù.

    /www/var/spool/clientmqueue µð·ºÅ丮¸¦ ¸¸µé°í ¼ÒÀ¯±ÇÀ» root.mail±×·ìÀ¸·Î
    º¯°æÇÑ´Ù
    - clientmqueue¿Í mailµð·ºÅ丮 Æ۹̼ÇÀº 755ÀÌ»ó Áà¾ßÇÑ´Ù -

    (ȤÀº ±âÁ¸ /var/spool/clientmqueueµð·ºÅ丮¸¦ º¹»çÇصµ µÈ´Ù.¹°·Ð
    Æ۹̼ÇÀº À¯ÁöÇÑä·Î º¹»çÇؾßÇÑ´Ù)

    ¿ª½Ã °°Àº ¹æ¹ýÀ¸·Î /www/var/spool/mail µð·ºÅ丮¸¦ ¸¸µé°í ¼ÒÀ¯±ÇÀº
    clientmqueue¿Í °°ÀÌ ¼³Á¤ÇÑ´Ù.

    ¶ÇÇÑ /etc/shadow¿¡¼­µµ mailÀ¯Àú¿¡ ÇØ´çÇÏ´Â Çʵ带 /www/etc/shadow¿¡ Ãß°¡ÇÑ´Ù.

    php.ini¿¡¼­ snedmailÀÇ °æ·Î´Â ÁÖ¼®Ã³¸®µÈ ±âº»°ªÀ¸·Î »ç¿ëÇÑ´Ù.
    ¼³Á¤ÀÌ Á¤È®È÷ µÆ´Ù¸é chrootµÈ apacheÀÇ ¸ðµâÀÎ php¿¡¼­ Æû¸ÞÀϵîÀ¸·Î
    ¸ÞÀÏÀ» º¸³Â´Ù¸é sendmailÀº /www/usr/sbin/sendmailÀÌ ½ÇÇàµÇ°í
    ½ÇÁ¦ ¸ÞÀϵ¥ÀÌŸ´Â /var/spool/mail/user_nameÀ¸·Î ÀúÀåµÉ°ÍÀÌ´Ù.

    À¥¸ÞÀϵîÀÇ ÇÁ·Î±×·¥À¸·Î Á¤»óÀûÀ¸·Î ¸ÞÀÏÀÌ µµÂøÇÏ´ÂÁö È®ÀÎÇϴ°ÍÀ¸·Î sendmail
    ¼³Á¤ÀÌ ³¡³µ´Ù.
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