{"id":517,"date":"2020-04-30T00:10:17","date_gmt":"2020-04-29T15:10:17","guid":{"rendered":"https:\/\/blog.enyou.net\/?p=517"},"modified":"2020-04-30T22:52:04","modified_gmt":"2020-04-30T13:52:04","slug":"cname%ea%b3%bc-ptr-%eb%a0%88%ec%bd%94%eb%93%9c%ec%9d%98-%ec%b0%a8%ec%9d%b4%eb%8a%94-%eb%ac%b4%ec%97%87%ec%9d%b8%ea%b0%80","status":"publish","type":"post","link":"https:\/\/blog.enyou.net\/ko\/archives\/517","title":{"rendered":"\uc65c CNAME\uc740 ROOT\uc5d0\uc11c \uc4f8 \uc218 \uc5c6\ub294\uac00? PTR \ub808\ucf54\ub4dc\ub780 \ubb34\uc5c7\uc778\uac00?"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\uac1c\uc694<\/h2>\n\n\n\n<p>\ub3c4\uba54\uc778 \ub4f1\ub85d \ud68c\uc0ac\ub97c \uad6c\uae00 \ub3c4\uba54\uc778\uc73c\ub85c \ubc14\uafb8\uba74\uc11c \ub3c4\uba54\uc778\uc758 \ub8e8\ud2b8\uc5d0 CNAME\uc744 \ub4f1\ub85d\ud560 \uc218 \uc5c6\uc5c8\ub2e4. \ub098\ub294 \uc9d1\uc5d0\uc11c DDNS\uc744 \uc774\uc6a9\ud574\uc11c \uc11c\ubc84\ub97c \ub3cc\ub9ac\uace0 \uc788\uae30 \ub54c\ubb38\uc5d0, ip\uc8fc\uc18c\ub97c \ub4f1\ub85d\ud558\ub294 A \ub808\ucf54\ub4dc\ub294 \uc774\uc6a9\ud558\uae30 \uc5b4\ub824\uc6e0\ub2e4. \uad6c\uae00 \ub3c4\uba54\uc778 \ub808\ucf54\ub4dc \ub4f1\ub85d \uc911\uc5d0 \ub3c4\uba54\uc778\uc744 \ubc1b\ub294 \ub808\ucf54\ub4dc\uc778 PTR \ub808\ucf54\ub4dc\uac00 \uc788\uc5b4 DDNS \ub3c4\uba54\uc778\uc744 \ub4f1\ub85d\ud574\ubd24\ub2e4. CNAME\uc774 \uc544\ub2cc PTR\ub85c DDNS \uc8fc\uc18c\ub97c \ub4f1\ub85d\ud558\ub2c8 \uc798 \ub3d9\uc791\ud588\ub2e4.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">CNAME \ub808\ucf54\ub4dc\ub294 \uc65c \ub8e8\ud2b8\uc5d0 \ub4f1\ub85d\ub420 \uc218 \uc5c6\uc744\uae4c?<\/h2>\n\n\n\n<p>\uadf8\ub7f0\ub370 \uc65c \uad6c\uae00 \ub3c4\uba54\uc778\uc5d0\uc11c\ub294 \ub3c4\uba54\uc778\uc758 \ub8e8\ud2b8\uc5d0 CNAME\uc744 \ub4f1\ub85d\ud560 \uc218 \uc5c6\ub294 \uac78\uae4c. DNS \ud45c\uc900 \uaddc\uce59\uc5d0 \uc758\ud558\uba74 \ub2e4\uc74c\uacfc \uac19\uc740 \ub3c4\uba54\uc778 \uc81c\uc57d \uc0ac\ud56d\uc774 \uc788\ub2e4.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>SOA\uc640 NS \ub808\ucf54\ub4dc\ub294 \ub8e8\ud2b8 \ub3c4\uba54\uc778\uc5d0\uc11c \ubc18\ub4dc\uc2dc \ud45c\ud604\ub418\uc5b4\uc57c \ud569\ub2c8\ub2e4. (RFC 1912)<\/li><li>DNSSEC\uc758 SIG, NXT, KEY RR \ub808\ucf54\ub4dc\ub97c \uc81c\uc678\ud558\uace0\uc11c\ub294 CNAME \ub808\ucf54\ub4dc\ub294 \ub2e4\ub978 \ub808\ucf54\ub4dc\uc640 \uac19\uc774 \uc4f0\uc77c \uc218 \uc5c6\uc2b5\ub2c8\ub2e4. (RFC 2181)<\/li><\/ul>\n\n\n\n<p>\uc774 \uc81c\uc57d \uc0ac\ud56d\uc774 \uae30\uc220\uc801\uc73c\ub85c \ubc18\ub4dc\uc2dc \uac15\uc81c\ub418\ub294 \uac83\uc740 \uc544\ub2c8\ub2e4. (\ub0b4\uac00 \uc4f0\ub358 \ub3c4\uba54\uc778 \ub4f1\ub85d \ud68c\uc0ac\uc758 \ub124\uc784\uc11c\ubc84\ub294 root \ub3c4\uba54\uc778\uc5d0 CNAME \ub808\ucf54\ub4dc\ub97c \ub450\ub3c4\ub85d \ud5c8\uc6a9\ud588\ub2e4. dig \ub3c4\uba54\uc778 \uc8fc\uc18c\ub85c \uadf8 \ub3c4\uba54\uc778\uc758 \ub8e8\ud2b8\ub97c \ud655\uc778\ud574\ubcf4\uba74 SOA\uc640 NS \ub808\ucf54\ub4dc\ub294 \ubcf4\uc774\uc9c0 \uc54a\uace0, CNAME \ub808\ucf54\ub4dc\ub9cc \ubcf4\uc778\ub2e4.) \ud558\uc9c0\ub9cc, \ud45c\uc900 \uaddc\uc57d\uc744 \uc9c0\ud0a4\uc9c0 \uc54a\uc73c\uba74 \ubb38\uc81c\uac00 \uc0dd\uae38 \uc218 \uc788\ub2e4. \uc77c\ub840\ub85c \ub3c4\uba54\uc778\uc5d0 CNAME \ub808\ucf54\ub4dc\uc640 MX \ub808\ucf54\ub4dc\ub97c \ub3d9\uc2dc\uc5d0 \uc124\uc815\ud558\uba74, Microsoft Exchange mail server\uc5d0\uc11c CNAME \ub808\ucf54\ub4dc \uc678\uc5d0 \ub2e4\ub978 \ub808\ucf54\ub4dc\ub97c \ubb34\uc2dc\ud558\uc5ec \uc815\uc0c1\uc791\ub3d9\ud558\uc9c0 \uc54a\ub294\ub2e4. (https:\/\/blog.cloudflare.com\/introducing-cname-flattening-rfc-compliant-cnames-at-a-domains-root\/)<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\ub8e8\ud2b8\uc5d0 \ub3c4\uba54\uc778 \uc8fc\uc18c\ub97c \ub9e4\uce6d\ud560 \uc218 \uc788\ub294 \ubc29\ubc95\uc740 \uc5c6\ub294\uac00?<\/h2>\n\n\n\n<p>\ud558\uc9c0\ub9cc, \ub098\uc758 \uacbd\uc6b0\ucc98\ub7fc \ud56d\uc0c1 root domain\uc774 ip \uc8fc\uc18c\ub97c \ubc14\ub77c\ubcfc \uc218 \uc788\ub294 \ub808\ucf54\ub4dc\ub97c \uac00\uc9c8 \uc218 \uc5c6\ub294 \uacbd\uc6b0\ub3c4 \uc788\uc744 \uac83\uc774\ub2e4. (\uc608\ub97c \ub4e4\uc5b4 DDNS \ucc98\ub7fc \uc11c\ubc84\uc758 IP \uc8fc\uc18c\uac00 \uacc4\uc18d \ubc14\ub00c\ub294 \uacbd\uc6b0, \uc11c\ubc84\uac00 \ud558\ub098\uc774\ub4e0 \ub450 \uac1c \uc774\uc0c1\uc744 \ubcd1\ub82c \uc801\uc73c\ub85c \uad6c\uc131\ud55c \uc0ac\uc720\uc774\ub4e0 \uadf8\ub7f4 \uacbd\uc6b0\ub294 \ub9ce\ub2e4.) \ub530\ub77c\uc11c \ud45c\uc900\uc744 \uc9c0\ud0a4\ub294 \ub3c4\uba54\uc778 \ub124\uc784\uc11c\ubc84 \uc81c\uacf5 \ud68c\uc0ac\ub294 \uc790\uc2e0\ub4e4\uc774 \uc81c\uacf5\ud558\ub294 \ubcc4\ub3c4\uc758 \ub808\ucf54\ub4dc\ub85c root domain\uc5d0\uc11c CNAME \ub808\ucf54\ub4dc\uc640 \ube44\uc2b7\ud55c \uae30\ub2a5\uc744 \ud560 \uc218 \uc788\ub3c4\ub85d \uad6c\ud604\ud588\ub2e4. (\uc608\ub97c \ub4e4\uc5b4 ALIAS\ub098, ANAME, \uac00\uc0c1 CNAME(CNAME Flattening) \ub4f1) \uc774\ub4e4\uc740 \uc2e4\uc81c\ub85c \ub3c4\uba54\uc778 \uc8fc\uc18c\uac12\uc744 \ubc1b\ub294 \ub808\ucf54\ub4dc\uc774\uc9c0\ub9cc, \ub124\uc784\uc11c\ubc84 \ub2e8\uc5d0\uc11c \ud55c \ubc88 \uc774 \ub3c4\uba54\uc778 \ub808\ucf54\ub4dc\ub97c \ud574\uc11d\ud558\uc5ec IP \uc8fc\uc18c\ub97c \ubc1b\uc544\uc640 A \ub808\ucf54\ub4dc\ub85c \ud074\ub77c\uc774\uc5b8\ud2b8\uc5d0\uac8c \uc81c\uacf5\ud55c\ub2e4.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"2180\" height=\"1486\" src=\"https:\/\/blog.enyou.net\/wp-content\/uploads\/2020\/04\/cname-1.png\" alt=\"\" class=\"wp-image-528\" srcset=\"https:\/\/blog.enyou.net\/wp-content\/uploads\/2020\/04\/cname-1.png 2180w, https:\/\/blog.enyou.net\/wp-content\/uploads\/2020\/04\/cname-1-300x204.png 300w, https:\/\/blog.enyou.net\/wp-content\/uploads\/2020\/04\/cname-1-1024x698.png 1024w, https:\/\/blog.enyou.net\/wp-content\/uploads\/2020\/04\/cname-1-768x524.png 768w, https:\/\/blog.enyou.net\/wp-content\/uploads\/2020\/04\/cname-1-1536x1047.png 1536w, https:\/\/blog.enyou.net\/wp-content\/uploads\/2020\/04\/cname-1-2048x1396.png 2048w\" sizes=\"(max-width: 2180px) 100vw, 2180px\" \/><\/figure><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">PTR \ub808\ucf54\ub4dc\ub780 \ubb34\uc5c7\uc778\uac00?<\/h2>\n\n\n\n<p>PTR \ub808\ucf54\ub4dc\ub294 \ub3c4\uba54\uc778 \uc8fc\uc18c\ub85c\ubd80\ud130 \uc11c\ubc84\uc758 IP \uc8fc\uc18c\ub97c \uac80\uc99d\ud558\uae30 \uc704\ud55c \uac83\uc774\ub2e4. \ub098\ub294 \uad6c\uae00 \ub3c4\uba54\uc778\uc73c\ub85c \ubc14\uafbc \uc774\ud6c4\uc5d0 \uac00\uc0c1 CNAME\uacfc \uac19\uc740 \uc5ed\ud560\uc744 \ud558\uae30 \uc704\ud574 PTR \ub3c4\uba54\uc778\uc744 \uc124\uc815\ud588\ub294\ub370, \ub3c4\uba54\uc778 \uc8fc\uc18c\ub85c \ubd80\ud130 IP \uc8fc\uc18c\ub97c \uc54c\uc544\ub0b4\ub294 PTR\uc774 \uc5b4\ub5bb\uac8c \uadf8\ub7f0 \uae30\ub2a5\uc744 \ud55c \uac83\uc77c\uae4c?<\/p>\n\n\n\n<p>ISP\uc5d0 \ub530\ub77c PTR \ub808\ucf54\ub4dc\ub97c \uc9c1\uc811 \uad00\ub9ac\ud558\ub294 \uacbd\uc6b0(\uc989, \ub3c4\uba54\uc778 \uc8fc\uc18c -&gt; IP \uc8fc\uc18c\uc758 \ub300\uc751\uc5d0 \uad00\ud55c \uc815\ubcf4\ub97c ISP\uac00 \uc950\uace0 \uc788\uc74c.)\uc640 \ub3c4\uba54\uc778 \ub4f1\ub85d\uc790\uc5d0 \uc704\uc784\ud558\ub294 \uacbd\uc6b0\uac00 \uc788\ub2e4. \uc774\ub54c, \ub3c4\uba54\uc778 \ub4f1\ub85d\uc790\uc5d0 \uc704\uc784\uc744 \ud558\ub824\uba74 ISP\ub294 \ub9cc\uc57d 111.222.33.4\uc640 \uac19\uc740 \ub3c4\uba54\uc778\uc744 \uc704\uc784\ud560 \uc218 \uc788\uac8c 4.33.222.111.in-addr.arpa. -&gt; ptr_www.example.com.\uc758 CNAME\uc744 \uc124\uc815\ud558\uc5ec\uc57c \ud55c\ub2e4. \uc774\ub54c, \uc790\uc2e0\uc758 \ub3c4\uba54\uc778\uc5d0 PTR \ub808\ucf54\ub4dc\ub85c ptr_www -&gt; www.example.com. \uacfc \uac19\uc774 \uc124\uc815\ud558\uba74 111.222.33.4\uac00 www.example\uc5d0 \ub300\uc751\ud55c\ub2e4\ub294 \uc0ac\uc2e4\uc744 \uc54c \uc218 \uc788\ub2e4.<\/p>\n\n\n\n<div class=\"wp-block-image is-style-default\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"2228\" height=\"1332\" src=\"https:\/\/blog.enyou.net\/wp-content\/uploads\/2020\/04\/ptr-1.png\" alt=\"\" class=\"wp-image-529\" srcset=\"https:\/\/blog.enyou.net\/wp-content\/uploads\/2020\/04\/ptr-1.png 2228w, https:\/\/blog.enyou.net\/wp-content\/uploads\/2020\/04\/ptr-1-300x179.png 300w, https:\/\/blog.enyou.net\/wp-content\/uploads\/2020\/04\/ptr-1-1024x612.png 1024w, https:\/\/blog.enyou.net\/wp-content\/uploads\/2020\/04\/ptr-1-768x459.png 768w, https:\/\/blog.enyou.net\/wp-content\/uploads\/2020\/04\/ptr-1-1536x918.png 1536w, https:\/\/blog.enyou.net\/wp-content\/uploads\/2020\/04\/ptr-1-2048x1224.png 2048w\" sizes=\"(max-width: 2228px) 100vw, 2228px\" \/><\/figure><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">\uacb0\ub860<\/h2>\n\n\n\n<p>\uc989, PTR \ub808\ucf54\ub4dc\ub97c \uac00\uc0c1 CNAME \ub808\ucf54\ub4dc \ucc98\ub7fc \uc774\uc6a9\ud560 \uc218 \uc788\uc9c0\ub9cc, \ubcf8\ub798\uc758 \ubaa9\uc801\uc5d0 \ub9de\uc9c0 \uc54a\ub294 \uac83\uc774\ub2e4. \ub530\ub77c\uc11c \ub098\ub294 \uac00\uc0c1 CNAME\uc744 \uc81c\uacf5\ud558\ub294 DNS \uc11c\ubc84\ub85c \ub3c4\uba54\uc778\uc758 \uc8fc\uc18c\ub97c \uc62e\uacbc\ub2e4. (\ubb54\uac00 \uc2dc\uc791\ud560 \ub54c \uc0dd\uac01\ud55c \uac83\uacfc \ub2e4\ub974\uac8c, \uacb0\ub860\uc774 \uc774\uc0c1\ud55c \uac83 \uac19\uc9c0\ub9cc \ub0b4 \ubb38\uc81c\uac00 \ud574\uacb0\ub418\uc5c8\ub2e4.)<\/p>\n\n\n\n<p>\ucc38\uace0\ud55c \uae00:<br>https:\/\/support.google.com\/domains\/answer\/3251147?hl=ko<br>https:\/\/www.freecodecamp.org\/news\/why-cant-a-domain-s-root-be-a-cname-8cbab38e5f5c\/<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\uac1c\uc694 \ub3c4\uba54\uc778 \ub4f1\ub85d \ud68c\uc0ac\ub97c \uad6c\uae00 \ub3c4\uba54\uc778\uc73c\ub85c \ubc14\uafb8\uba74\uc11c \ub3c4\uba54\uc778\uc758 \ub8e8\ud2b8\uc5d0 CNAME\uc744 \ub4f1\ub85d\ud560 \uc218 \uc5c6\uc5c8\ub2e4. \ub098\ub294 \uc9d1\uc5d0\uc11c DDNS\uc744 \uc774\uc6a9\ud574\uc11c \uc11c\ubc84\ub97c \ub3cc\ub9ac\uace0 \uc788\uae30 \ub54c\ubb38\uc5d0, ip\uc8fc\uc18c\ub97c \ub4f1\ub85d\ud558\ub294 A \ub808\ucf54\ub4dc\ub294 \uc774\uc6a9\ud558\uae30 \uc5b4\ub824\uc6e0\ub2e4. \uad6c\uae00 \ub3c4\uba54\uc778 \ub808\ucf54\ub4dc \ub4f1\ub85d \uc911\uc5d0 \ub3c4\uba54\uc778\uc744 \ubc1b\ub294 \ub808\ucf54\ub4dc\uc778 PTR \ub808\ucf54\ub4dc\uac00 \uc788\uc5b4 DDNS \ub3c4\uba54\uc778\uc744 \ub4f1\ub85d\ud574\ubd24\ub2e4. CNAME\uc774 \uc544\ub2cc PTR\ub85c DDNS \uc8fc\uc18c\ub97c \ub4f1\ub85d\ud558\ub2c8 \uc798 \ub3d9\uc791\ud588\ub2e4. CNAME [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-517","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/blog.enyou.net\/ko\/wp-json\/wp\/v2\/posts\/517"}],"collection":[{"href":"https:\/\/blog.enyou.net\/ko\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.enyou.net\/ko\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.enyou.net\/ko\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.enyou.net\/ko\/wp-json\/wp\/v2\/comments?post=517"}],"version-history":[{"count":10,"href":"https:\/\/blog.enyou.net\/ko\/wp-json\/wp\/v2\/posts\/517\/revisions"}],"predecessor-version":[{"id":588,"href":"https:\/\/blog.enyou.net\/ko\/wp-json\/wp\/v2\/posts\/517\/revisions\/588"}],"wp:attachment":[{"href":"https:\/\/blog.enyou.net\/ko\/wp-json\/wp\/v2\/media?parent=517"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.enyou.net\/ko\/wp-json\/wp\/v2\/categories?post=517"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.enyou.net\/ko\/wp-json\/wp\/v2\/tags?post=517"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}