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[Linux] ¸®´ª½º ¹æȺ® firewalldÀÇ ¼Ò°³ ¹× È°¿ë |
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Date : 2023-05-26
Name : ¼¹ö¸ó
Hits : 958
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¾È³çÇϼ¼¿ä. ÁÖ½Äȸ»ç ¼¹ö¸ó ÀÔ´Ï´Ù. ¿À´ÃÀº ¸®´ª½º ¹æȺ® firewalld¿¡ ´ëÇØ ¾Ë¾Æº¸µµ·Ï ÇÏ°Ú½À´Ï´Ù. firewalldÀº ´Ù¾çÇÑ ¸®´ª½º ȯ°æ¿¡¼ ±âº» ¹æȺ® °ü¸® µµ±¸·Î »ç¿ëµÇ°í ÀÖÀ¸¸ç º» ±Û¿¡¼´Â CentOS 7.x ȯ°æÀ» ±â¹ÝÀ¸·Î Å×½ºÆ®µÇ¾ú½À´Ï´Ù. (firewalld´Â ½Ã½ºÅÛ °ü·Ã ¼³Á¤À̹ǷΠÀÛ¾÷ ½Ã root ±ÇÇÑ ÇÊ¿ä) CentOSÀÇ °æ¿ì 6¹öÀü ÀÌÇÏ¿¡¼´Â firewalldÀÌ ¾Æ´Ñ iptables ¸í·ÉÀ» »ç¿ëÇϹǷΠÇØ´ç ³»¿ëÀº ¾Æ·¡ ¸µÅ©¸¦ Âü°í ºÎŹ µå¸³´Ï´Ù. firewalld ¶õ?1. firewalld ´Â ¹«¾ùÀΰ¡ firewalld´Â °£´ÜÈ÷ ¸»Çؼ CentOS 7.x ¹öÀüºÎÅÍ »ç¿ëµÇ´Â ¸®´ª½º ¹æȺ® °ü¸® µµ±¸ ÀÔ´Ï´Ù. ¸®´ª½ºÀÇ ¹æȺ®Àº ¸®´ª½º Ä¿³Î¿¡ Æ÷ÇÔµÈ Netfilter ¶ó´Â ¼ºê ½Ã½ºÅÛÀ¸·Î »ç¿ëµÇ¸ç ¹Ì¸® ÁöÁ¤µÈ ±ÔÄ¢¿¡ ÀÇÇØ ÆÐŶÀÇ ¼Û/¼ö½ÅÀ» Çã¿ë/Â÷´ÜÇÏ´Â ÆÐŶ ÇÊÅ͸µ ÇüÅ·Πµ¿À۵˴ϴÙ. CentOS 6.x ¹öÀü±îÁö´Â NetfilterÀÇ °ü¸® ÀÎÅÍÆäÀ̽º°¡ iptables ¿´°í CentOS 7.x ¹öÀüºÎÅÍ´Â NetfilterÀÇ °ü¸® ÀÎÅÍÆäÀ̽º°¡ firewalld ·Î º¯°æµÇ¾ú½À´Ï´Ù. ¹°·Ð CentOS 7.x ¹öÀü¿¡¼µµ º°µµ ¼³Ä¡¸¦ ÅëÇØ iptablesÀ» »ç¿ëÇÏ´Â °ÍÀÌ °¡´ÉÇϳª iptables°ú ºñ±³Çϸé firewalldÀÇ ÀåÁ¡ÀÌ ¸¹±â ¶§¹®¿¡ firewalld¸¦ »ç¿ëÇÏ´Â °ÍÀÌ Æí¸®ÇÕ´Ï´Ù. 2. firewalld¿Í iptablesÀÇ Â÷ÀÌÁ¡ firewalld¿Í iptablesÀÇ Â÷ÀÌÁ¡Àº ¾Æ·¡¿Í °°ÀÌ Á¤¸®ÇÒ ¼ö ÀÖ½À´Ï´Ù.
À§¿Í °°ÀÌ firewalldÀº iptables°ú ºñ±³ÇÏ¸é ¼³Á¤ ¹æ¹ýÀÌ ½¬¿ì¸ç ¼³Á¤ÀÇ Àû¿ë°ú °ü¸®°¡ À¯¿¬ÇÏ´Ù´Â ÀåÁ¡ÀÌ ÀÖ½À´Ï´Ù. 3. firewalld¿¡¼ÀÇ zoneÀ̶õ? firewalld´Â ¹æȺ® ±ÔÄ¢À» zoneÀ̶ó´Â ÇüÅ·Π¹¾î¼ °ü¸®ÇÒ ¼ö ÀÖ½À´Ï´Ù. ±âº»ÀûÀ¸·Î ¾Æ·¡¿Í °°ÀÌ 9°³ÀÇ ¿ëµµº° zoneÀÌ ¸¶·ÃµÇ¾î ÀÖÀ¸¸ç ³×Æ®¿öÅ© ÀÎÅÍÆäÀ̽º¸¦ ÇÒ´çÇÏ´Â ¹æ¹ýÀ¸·Î ¼³Á¤, »ç¿ëÇÕ´Ï´Ù. (°¢ zoneÀº /etc/firewalld/zones/ °æ·Î ³» .xml ÆÄÀÏ·Î »ý¼ºÇÏ¿© »ç¿ë)
firewalld ¼ºñ½º °ü¸®firewalld ¼ºñ½º´Â ¾Æ·¡¿Í °°Àº ¸í·É¾îµé·Î °ü¸®°¡ °¡´ÉÇÕ´Ï´Ù. - firewalld ¼ºñ½º ºñÈ°¼ºÈ # systemctl disables firewalld - firewalld ¼ºñ½º È°¼ºÈ # systemctl enable firewalld - firewalld ¼ºñ½º ÁßÁö # systemctl stop firewalld - firewalld ¼ºñ½º ½ÃÀÛ # systemctl start firewalld - firewalld ¼ºñ½º Àç½ÃÀÛ # systemctl restart firewalld - firewalld ¼ºñ½º »óÅ ȮÀÎ # systemctl status firewalld firewalld ±âº» ¸í·É¾î »ç¿ëfirewalld ¼ºñ½º´Â ¾Æ·¡¿Í °°Àº ¸í·É¾îµé·Î ±âº» Á¤º¸ È®ÀÎÀÌ °¡´ÉÇÕ´Ï´Ù. - firewalld ¹öÀü È®ÀÎ # firewall-cmd --version - ÇöÀç firewalld ±âº» zone È®ÀÎ # firewall-cmd --get-default-zone - zoneÀÇ »ý¼º ¹× »èÁ¦ # firewall-cmd --permanent --new-zone=test # firewall-cmd --permanent --delete-zone=test - ±âº» zone º¯°æ(test·Î º¯°æ) # firewall-cmd --set-default-zone=test - ÇöÀç firewalld ¼³Á¤ Á¤º¸ È®ÀÎ # firewall-cmd --list-all - Á¤ÀÇµÈ service ¸ñ·Ï È®ÀÎ # firewall-cmd --get-service - Çã¿ëµÈ service ¸ñ·Ï È®ÀÎ # firewall-cmd --list-service - firewalld Àüü ¸í·É¾î È®ÀÎ # firewall-cmd -h firewalld zone °ü¸®firewalld¿¡¼´Â ±âº»ÀûÀ¸·Î public À̶ó´Â zoneÀÌ »ý¼ºµÇ¾îÀÖÀ¸¸ç ³×Æ®¿öÅ© ÀÎÅÍÆäÀ̽º¿¡ ±âº»°ªÀ¸·Î µî·ÏÀÌ µÇ¾îÀÖ½À´Ï´Ù. ±×·³ ÀÌÁ¦ º»°ÝÀûÀ¸·Î public zone¿¡ ±ÔÄ¢À» °ü¸®ÇÏ´Â ¹æ¹ýÀ» ¾Ë¾Æº¸°Ú½À´Ï´Ù. 1. service ·Î ¹æȺ® Çã¿ë µî·ÏÇϱ⠿켱 Çã¿ëÇÒ ¼ºñ½º°¡ Áö¿øÇÏ´Â ¼ºñ½º ¸ñ·Ï¿¡ Á¸ÀçÇÏ´ÂÁö È®ÀÎÇÏ¿©¾ß ÇÕ´Ï´Ù. # firewall-cmd --get-service ÇöÀç public¿¡ Çã¿ë µî·ÏµÈ ¼ºñ½º¸¦ È®ÀÎÇÏ°í # firewall-cmd --list-service --zone=public public zone¿¡ 4°³ÀÇ ¼ºñ½º (http, https, dns, telnet)¸¦ Ãß°¡Çغ¸°Ú½À´Ï´Ù. Ãß°¡ÇÑ ¼ºñ½º Áß telnetÀº ´Ù½Ã »èÁ¦ÇÏ°í # firewall-cmd --permanent --zone=public --remove-service=telnet ¼ºñ½º Ãß°¡ ÈÄ ¼ºñ½º Àû¿ëÀ» À§ÇØ ¹æȺ® Àç½ÃÀÛ public¿¡ Çã¿ë Ãß°¡µÈ ¼ºñ½º¸¦ ÀçÈ®ÀÎÇÕ´Ï´Ù. # firewall-cmd --list-service --zone=public À§ »çÁø°ú °°ÀÌ Á¤»óÀûÀ¸·Î 3°³ÀÇ ¼ºñ½º (http, https, dns)°¡ Ãß°¡µÈ °ÍÀ» È®ÀÎÇÒ ¼ö ÀÖ½À´Ï´Ù. 2. port·Î ¹æȺ® Çã¿ë µî·ÏÇϱ⠱׷³ À̹ø¿¡´Â port¸¦ µî·ÏÇÏ´Â ¹æ¹ýÀ» ¾Ë¾Æº¸°Ú½À´Ï´Ù. 8080/tcp¿Í 8081/tcp¸¦ Ãß°¡ÇÏ°í 8081/tcp´Â ´Ù½Ã »èÁ¦ÇÏ´Â ÀÛ¾÷À» Çغ¸°Ú½À´Ï´Ù. Ãß°¡ Àü¿¡ Çã¿ë Æ÷Æ® ¸®½ºÆ® È®ÀÎÇÏ°í À§ »çÁø°ú °°ÀÌ 8080 Æ÷Æ®°¡ Ãß°¡µÇ¾î ÀÖÀ½À» È®ÀÎÇÒ ¼ö ÀÖ½À´Ï´Ù. 3. IP ´ë¿ªÀ¸·Î ¹æȺ® Çã¿ë µî·ÏÇϱâ IP·Î Ãß°¡ÇÏ´Â ÀÛ¾÷Àº ƯÁ¤ IP³ª IP ´ë¿ªÀ» Çã¿ëÇÒ ¶§ »ç¿ë ÇÕ´Ï´Ù. 10.0.1.0/24, 10.0.2.0/24¿¡ ÇØ´çÇÏ´Â IP ´ë¿ªÀ» Ãß°¡ÇÏ°í 10.0.2.0/24´Â ´Ù½Ã »èÁ¦ÇÏ´Â ÀÛ¾÷À» Çغ¸°Ú½À´Ï´Ù. Çã¿ë IP ¸®½ºÆ® È®ÀÎ (Ãß°¡ Àü) À§ »çÁø°ú °°ÀÌ 10.0.1.0/24 ´ë¿ªÀÌ Á¤»óÀûÀ¸·Î µî·ÏµÇ¾î ÀÖÀ½À» È®ÀÎÇÒ ¼ö ÀÖ½À´Ï´Ù. 4. xml ÆÄÀÏÀ» Á÷Á¢ ¼öÁ¤Çϱ⠸¶Áö¸·À¸·Î´Â zoneÀÇ xml ÆÄÀÏÀ» Á÷Á¢ ¼öÁ¤ÇÏ´Â ÀÛ¾÷À» ÁøÇàÇغ¸°Ú½À´Ï´Ù. ÀÏÀÏÀÌ ¸í·É¾î¸¦ ÀÔ·ÂÇϱ⠾î·Æ´Ù¸é ÀÌ ¹æ¹ýÀÌ ´õ °£´ÜÇÒ ¼ö ÀÖ½À´Ï´Ù. ¿ì¼± /etc/firewalld/zones/ °æ·Î¿¡ ÀÖ´Â public.xml ÆÄÀÏÀÇ ³»¿ëÀ» È®ÀÎÇغ¸°Ú½À´Ï´Ù. #cat /etc/firewalld/zones/public.xml ±âº»ÀûÀ¸·Î Ãß°¡µÇ¾îÀÖ´ø ¼ºñ½º dhcpv6-client ¿Í ssh ¿Ü¿¡ Áö±Ý±îÁö ÀÛ¾÷Çß¾ú´ø 3°³ÀÇ ¼ºñ½º (http, https, dns), 8080 Æ÷Æ®, 10.0.1.0/24 ´ë¿ªÀÌ Ãß°¡µÇ¾î ÀÖÀ½À» È®ÀÎÇÒ ¼ö ÀÖ½À´Ï´Ù. ÀÚ ±×·³ À§¿¡¼ Ãß°¡Çß´Ù°¡ »èÁ¦Çß´ø telnet¼ºñ½º, 8081Æ÷Æ®, 10.0.2.0/24 ´ë¿ªÀ» xml ÆÄÀÏ¿¡ Á÷Á¢ Ãß°¡ÇÏ¿© Á¤»óÀûÀ¸·Î Àû¿ëµÇ´ÂÁö º¸°Ú½À´Ï´Ù. public.xml ÆÄÀÏÀ» vi ÆíÁý±â·Î ¿¾îº¸°Ú½À´Ï´Ù. # vi /etc/firewalld/zones/public.xml i ¸¦ ÀÔ·ÂÇÏ¿© ÀԷ¸ðµå·Î ¹Ù²ãÁØ ÈÄ ±âÁ¸¿¡ µî·ÏµÇ¾îÀÖ´Â °ªµéÀ» ÂüÁ¶ÇÏ¿© ¾Æ·¡ »çÁø°ú °°ÀÌ telnet¼ºñ½º, 8081Æ÷Æ®, 10.0.2.0/24 ´ë¿ªÀ» Ãß°¡ÇÕ´Ï´Ù. ¼öÁ¤ ÀÛ¾÷ÀÌ ¿Ï·áµÇ¾ú´Ù¸é esc Å°¸¦ ´©¸£°í :wq¸¦ ÀÔ·ÂÇÏ¿© ÀúÀå ÈÄ ºüÁ®³ª¿É´Ï´Ù. ¼öÁ¤µÈ »çÇ× Àû¿ëÀ» À§ÇÑ ¹æȺ® Àç½ÃÀÛÀ» ÁøÇàÇÏ°í Çã¿ë Ãß°¡µÈ ¼ºñ½º È®ÀÎ # firewall-cmd --list-service --zone=public Çã¿ë Æ÷Æ® ¸®½ºÆ® È®ÀÎ Çã¿ë IP ¸®½ºÆ® È®ÀÎÀ» °¢°¢ ÁøÇàÇغ¸¸é À§ »çÁø°ú °°ÀÌ telnet¼ºñ½º, 8081Æ÷Æ®, 10.0.2.0/24 ´ë¿ªÀÌ Á¤»óÀûÀ¸·Î Ãß°¡µÇ¾úÀ½À» È®ÀÎÇÒ ¼ö ÀÖ½À´Ï´Ù. ¸¶Ä¡¸ç¿À´ÃÀº ¸®´ª½º ¹æȺ® firewalld¿¡ ´ëÇØ ¾Ë¾Æº¸¾Ò½À´Ï´Ù. ±âº»ÀûÀ¸·Î firewalld¼ºñ½º¸¦ °ü¸®ÇÏ´Â ºÎºÐºÎÅÍ ¼ºñ½º, Æ÷Æ®, IP´ë¿ªÀ¸·Î ¹æȺ® Çã¿ë µî·ÏÇÏ´Â ¹æ¹ýÀ» ¾Ë¾Æº¸¾Ò´Âµ¥¿ä. ¿À´Ã È®ÀÎÇÑ ³»¿ë ¿Ü¿¡µµ ´Ù¾çÇÑ È¯°æ°ú ¿ëµµ¿¡ µû¸¥ È°¿ë ¹æ¹ýÀÌ ÀÖÁö¸¸ ÇØ´ç ³»¿ëÀº ³ªÁß¿¡ ±âȸ°¡ µÈ´Ù¸é ´Ù½Ã ´Ù·ê ¼ö ÀÖµµ·Ï ÇÏ°Ú½À´Ï´Ù. ¾Æ¸¶µµ º» Æ÷½ºÆà ³»¿ë¸¸À¸·Îµµ ¸®´ª½º ¹æȺ®¿¡ ´ëÇÑ ±âº» ³»¿ë°ú ¿øÇÏ´Â Ç׸ñ¿¡ ´ëÇÑ ¹æȺ® Çã¿ë µî ÀϹÝÀûÀÎ °ü¸®¿¡´Â ¹®Á¦°¡ ¾øÀ» °ÍÀ¸·Î »ý°¢µË´Ï´Ù. 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