{"id":537,"date":"2012-05-30T04:02:41","date_gmt":"2012-05-30T04:02:41","guid":{"rendered":"http:\/\/apollo89.com\/wordpress\/?p=537"},"modified":"2013-02-21T08:32:36","modified_gmt":"2013-02-20T23:32:36","slug":"netstat-%ea%b3%a0%ea%b8%89-%ec%82%ac%ec%9a%a9%eb%b2%95","status":"publish","type":"post","link":"https:\/\/apollo89.com\/wordpress\/?p=537","title":{"rendered":"netstat \uc0ac\uc6a9\ubc95\uacfc \ub124\ud2b8\uc6cc\ud06c \uad00\ub828 \ucc38\uc870 \ud30c\uc77c"},"content":{"rendered":"<p>&nbsp;<\/p>\n<p>netstat \uc0ac\uc6a9\ubc95<\/p>\n<p>netstat \ub97c \uc790\uc8fc \uadf8\ub9ac\uace0 \ub9ce\uc774 \uc0ac\uc6a9\ud558\ub294\ub370 \uc880 \uad6c\uccb4\uc801\uc778 \ubc29\ubc95\uc744 \uc815\ub9ac\ud574\ub454\ub2e4.<\/p>\n<p>\uc5f4\ub824 \uc788\ub294 \ubaa8\ub4e0 \ud3ec\ud2b8<\/p>\n<pre class=\"lang:default decode:true \" >]# netstat -nap<\/pre>\n<p>LISTEN \ub418\ub294 \ubaa8\ub4e0 \ud3ec\ud2b8<\/p>\n<pre class=\"lang:default decode:true \" >]# netstat -l\r\n]# netstat -nap | grep LISTEN<\/pre>\n<p>\ubaa8\ub4e0 \uc11c\ube44\uc2a4 \ub3d9\uc2dc \uc811\uc18d\uc790 \uc218<\/p>\n<pre class=\"lang:default decode:true \" >]# netstat -nap | grep ESTABLISHED | wc -l<\/pre>\n<p>\uc6f9 \ub3d9\uc2dc \uc811\uc18d\uc790 \uc218<\/p>\n<pre class=\"lang:default decode:true \" >]# netstat -nap | grep :80 | grep ESTABLISHED | wc -l<\/pre>\n<p>\uc5f4\ub824\uc788\ub294 \ubaa8\ub4e0 TCP \ud3ec\ud2b8\ub97c \uc77c\uc815\uc2dc\uac04\ub9c8\ub2e4 \ubc18\ubcf5 \ucd9c\ub825<\/p>\n<pre class=\"lang:default decode:true \" >]# netstat -natc<\/pre>\n<p>\uc5b4\ub5a4 \ud504\ub85c\uc138\uc2a4\uac00 \ud3ec\ud2b8\ub97c \uc5f4\uace0\uc788\ub294\uc9c0 \ud655\uc778<\/p>\n<pre class=\"lang:default decode:true \" >]# lsof -i TCP:8080<\/pre>\n<p>stat \uc0c1\ud0dc \uc124\uba85<br \/>\nRecv-Q : \ud504\ub85c\uadf8\ub7a8\uc774 \uc18c\ucf13\uc744 \ub9fa\uace0 \uce74\ud53c\ub418\uc9c0 \uc54a\uc740 \ubc14\uc774\ud2b8\uc758 \uc218.<br \/>\nSend-Q : \ub9ac\ubaa8\ud2b8 \ud638\uc2a4\ud2b8\uc5d0 \uc758\ud574 ACK \ub418\uc9c0 \uc54a\uc740 \ubc14\uc774\ud2b8\uc758 \uc218.<br \/>\nLISTEN : \uc11c\ubc84 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc774 \uc801\uc7ac\ub418\uc5b4 \uc218\ub3d9\uc801\uc778 \ubaa8\ub4dc\ub85c \ud3ec\ud2b8\ub97c \uac1c\uc124\ud558\uc600\uc74c\uc744 \uc758\ubbf8. TCP\ub294 \uc5f0 \uacb0\uc694\uccad\uc774 \uc218\uc2e0 \ub418\uae30\ub97c \uae30\ub2e4\ub9bc<br \/>\nSYN-SENT : \ub85c\uceec \uc2dc\uc2a4\ud15c\uc758 \ud074\ub77c\uc774\uc5b8\ud2b8 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc774 \uc6d0\uaca9 \ud638\uc2a4\ud2b8\uc5d0 \ub2a5\ub3d9\uc801\uc778 \uac1c\uc124\uc744 \uc694\uccad. TCP\ub294 Synchronize flag \ub97c \uc124\uc815\ud55c \uc2dc\uc791 \uc138\uadf8\uba3c\ud2b8\ub97c \uc804\uc1a1 \ud558\uc600\uc73c\uba70, \uc6d0\uaca9 \uc2dc\uc2a4\ud15c\ub3c4 \uc5ed\uc2dc Synchronize flag \ub97c \uc124\uc815\ud55c \uc2dc\uc791 \uc138\uadf8\uba3c\ud2b8\ub85c \uc751\ub2f5\ud560 \uac83\uc744 \uae30\ub2e4\ub9bc.<br \/>\nSYN-RECEIVED : \uc11c\ubc84\uc758 TCP\uac00 \uc6d0\uaca9 \ud074\ub77c\uc774\uc5b8\ud2b8\ub85c\ubd80\ud130 Synchronize flag\uac00 \uc124\uc815\ub41c \uc2dc\uc791 \uc138\uadf8\uba3c\ud2b8\ub97c \uc218\uc2e0\ud558\uc600\uace0 \uc790\uc2e0\uc758 \uc2dc\uc791 \uc138\uadf8\uba3c\ud2b8\ub85c \uc751\ub2f5 \ud558\uc600\uc73c\uba70, \uadf8 \uc138\uadf8\uba3c\ud2b8\uc5d0 \ub300\ud55c \ud655\uc778 \uba54\uc138\uc9c0\ub97c \uae30\ub2e4\ub9bc.<br \/>\nESTABLISHED : \uac00\uc0c1\ud68c\uc120\uc774 \uc791\ub3d9. 3\ub2e8\uacc4 \ud578\ub4dc\uc170\uc774\ud0b9 \uacfc\uc815\uc774 \uc644\ub8cc\ub418\uba74 \ub450 \uc2dc\uc2a4\ud15c\uc740 \uc774 \uc0c1\ud0dc\uc5d0 \ub4e4\uc5b4\uac10.<br \/>\nFIN-WAIT-1 : \ub85c\uceec \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc740 \uac00\uc0c1 \ud68c\uc120\uc5d0 \ub2a5\ub3d9\uc801\uc778 \uc885\uacb0\uc744 \uc694\uccad\ud558\uc600\uc73c\uba70, TCP\ub294 Finish flag\uac00 \uc124\uc815\ub41c \uc885\uacb0 \uc138\uadf8\uba74\ud2b8\ub97c \uc804\uc1a1. \uadf8\ub7ec\ub098 TCP\ub294 \uc544\uc9c1\ub3c4 \uc6d0\uaca9 \uc2dc\uc2a4\ud15c\uc774 \uc138\uadf8\uba3c\ud2b8\uc5d0 \ub300\ud55c \ud655\uc778 \uba54\uc138\uc9c0\uc640 \uc790\uc2e0\ub9cc\uc758 \uc885\uacb0 \uc138\uadf8\uba3c\ud2b8\ub85c \uc751\ub2f5\ud558\uae30\ub97c \uae30\ub2e4\ub9bc. \ud68c\uc120\uc774 \uc644\uc804\ud788 \uc885\uacb0\ub420 \ub54c\uae4c\uc9c0 \uc6d0\uaca9 \uc2dc\uc2a4\ud15c\uc73c\ub85c\ubd80\ud130 \ub370\uc774\ud130\ub294 \uc218\uc2e0\ud558\uc9c0\ub9cc, \ucd94\uac00\uc801\uc778 \ub370\uc774\ud130\ub97c \uc804\uc1a1\ud558\uc9c0\ub294 \uc54a\uc74c.<br \/>\nCOLSE-WAIT : (FIN-WAIT-1 \uc758 \uc124\uba85\uacfc \uac19\uc774) Finish flag \uac00 \uc124\uc815\ub41c \uc885\uacb0 \uc138\uadf8\uba3c\ud2b8\uac00 \uc218\uc2e0\ub418\uc5c8\uace0 \ub85c\uceec TCP\ub294 \uadf8 \uc138\uadf8\uba3c\ud2b8\uc5d0 \ub300\ud55c \ud655\uc778 \uba54\uc138\uc9c0\ub97c \uc1a1\uc2e0 \uc2dc\uc2a4\ud15c\uc5d0 \uc804\uc1a1\ud568. \uadf8\ub7ec\ub098 \ub85c\uceec TCP\ub294 \ub85c\uceec \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc5d0\uc11c \uc791\uc5c5\uc744 \uc885\ub8cc\ud558\uc9c0\uc54a\uc544 \uc790\uc2e0\uc758 \uc885\uacb0 \uc138\uadf8\uba3c\ud2b8\ub97c \uc0dd\uc131\ud558\uc9c0 \ubabb\ud568<br \/>\nFIN-WAIT-2 : (FIN-WAIT-1 \uc758 \uc124\uba85\uacfc \ucc98\ub7fc) \ub85c\uceec TCP\ub294 Finish flag \uac00 \uc124\uc815\ub41c \uc885\uacb0 \uc138\uadf8\uba3c\ud2b8\ub97c \uc804\uc1a1\ud558\uc600\uc73c\uba70, (WAIT-CLOSE \uc758 \uc124\uba85\ub300\ub85c) \uc6d0\uaca9 \uc2dc\uc2a4\ud15c\uc73c\ub85c \ubd80\ud130 \uadf8 \uc138\uadf8\uba3c\ud2b8\uc5d0 \ub300\ud55c \ud655\uc778 \uba54\uc138\uc9c0\ub97c \uc2e0\ud568. \uadf8\ub7ec\ub098 \uc6d0\uaca9 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc774 \uc544\uc9c1 \uc791\uc5c5\uc744 \uc885\ub8cc \ud558\uc9c0 \uc54a\uc544 \uc6d0\uaca9TCP\uac00 \uc790\uc2e0\uc758 \uc885\uacb0 \uc138\uadf8\uba3c\ud2b8\ub97c \uc0dd\uc131\ud558\uc9c0 \ubabb\ud558\uace0 \uc788\ub294 \uc0c1\ud0dc\uc784.<br \/>\nLAST-ACK : (FIN-WAIT-1\uc758 \uc124\uba85\uacfc \uac19\uc774) Finish flag \uac00 \uc124\uc815\ub41c \uc885\uacb0 \uc138\uadf8\uba3c\ud2b8\uac00 \uc218\uc2e0\ub418\uc5c8\uace0, \ub85c\uceec \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc740 \ud68c\uc120\uc758 \uc885\uacb0\uc5d0 \ud569\uc758\ud558\uc5ec \uc790\uc2e0\ub3c4 \uc885\uacb0\uc744 \uc694\uccad\ud568. \uadf8 \uacb0\uacfc \ub85c\uceec TCP\ub294 Finish flag \uac00 \uc124\uc815\ub41c \uc790\uc2e0\uc758 \uc885\uacb0 \uc138\uadf8\uba3c\ud2b8\ub97c \uc804\uc1a1 \ud558\uc600\uc73c\uba70, \uc774 \uc138\uadf8\uba3c\ud2b8\uc5d0 \ub300\ud55c \ud655\uc778 \uba54\uc138\uc9c0\uac00 \uc218\uc2e0\ub418\uba74 \uc885\uacb0\ub428.<br \/>\nCLOSING : \uc774 \uc0c1\ud0dc\ub294 \ud754\ud558\uc9c0 \uc54a\uc73c\uba70, \uc77c\ubc18\uc801\uc73c\ub85c \uc138\uadf8\uba3c\ud2b8\uac00 \ub124\ud2b8\uc6cc\ud06c\uc5d0\uc11c \ubd84\uc2e4\ub418\uc5c8\ub2e4\ub294\uac83\uc744 \ub098\ud0c0\ub0c4. \uc774\ub7f0 \uacbd\uc6b0 \ub85c\uceec TCP\ub294 (FIN-WAIT-1 \uc758 \uc124\uba85\uacfc \uac19\uc774) Finish flag \uac00 \uc124\uc815\ub41c \uc885\uacb0 \uc138\uadf8\uba3c\ud2b8\ub97c \uc804\uc1a1 \ud558\uace0 (LAST-ACK \uc758 \uc124\uba85\uacfc \uac19\uc774) \uc6d0\uaca9 \uc2dc\uc2a4\ud15c\uc758 \uc885\uacb0 \uc138\uadf8\uba3c\ud2b8\ub3c4 \uc218\uc2e0\ud558\uc600\uc9c0\ub9cc, FINWAIT-1 \ub2e8\uacc4\uc5d0\uc11c \uc804\uc1a1\ud55c \uc138\uadf8\uba3c\ud2b8\uc5d0 \ub300\ud55c \ud655\uc778 \uba54\uc138\uc9c0\uac00 \uc218\uc2e0\ub418\uc9c0\uc54a\uc740 \uc0c1\ud0dc\uc784. \uc774 \uc0c1\ud0dc\ub294 \ubcf4\ud1b5 \ud655\uc778 \uba54\uc138\uc9c0\uac00 \uc804\uc1a1 \ub3c4\uc911 \ubd84\uc2e4\ub418\uc5c8\ub2e4\ub294 \uc758\ubbf8\uc784.<br \/>\nTIME-WAIT : \ud68c\uc120\uc758 \uc885\uacb0 \uc808\ucc28\uac00 \uc644\uacb0\ub418\uc5c8\uc73c\ub098 TCP \ub294 \ubd84\uc2e4\ub418\uc5c8\uc744\uc9c0 \ubaa8\ub974\ub294 \ub290\ub9b0 \uc138\uadf8\uba3c\ud2b8\ub97c \uc704\ud574\ub2f9\ubd84\uac04 \uc18c\ucf13\uc744 \uc5f4\uc5b4 \ub193\uc740 \uc0c1\ud0dc\ub85c \uc720\uc9c0.<br \/>\n\uc774 \uc0c1\ud0dc\ub294 \uc0c8\ub85c\uc6b4 \uc5f0\uacb0\uc774 \uae30\uc874\uc758 \uc5f0\uacb0\uc5d0\uc11c \uc0ac\uc6a9\ub41c \uc77c\ub828\ubc88\ud638\ub97c \ub2e4\uc2dc \uc0ac\uc6a9\ud558\ub294 \uac83\uc744 \ub9c9\uc74c. \uc6d0\uaca9 \uc2dc\uc2a4\ud15c\uc774 \uc885\uacb0\ud558\ub294 \ud638\uc2a4\ud2b8\ub85c\ubd80\ud130 \ub354\uc774\uc0c1 \ub370\uc774\ud130\ub97c \uc218\uc2e0\ud560 \uac00\ub2a5\uc131\uc774 \uc5c6\uc73c\ubbc0\ub85c, \uc774 \uc0c1\ud0dc\ub294 \ub2a5\uc801\uc778 \uc885\uacb0\uc744 \uc694\uccad\ud55c \ud638\uc2a4\ud2b8\uc5d0\uc11c\ub9cc \ub098\ud0c0\ub0a8.<br \/>\nCLOSED : \uc544\ubb34\uc77c\ub3c4 \ubc1c\uc0dd\ud558\uc9c0 \uc54a\uc74c. \ud68c\uc120\uc740 \uc885\uacb0\ub418\uc5c8\uace0, TCP\ub294 \uadf8 \uac00\uc0c1 \ud68c\uc120\uc5d0 \uc0ac\uc6a9\ud558\uc600\ub358 \ubaa8\ub4e0\uc790\uc6d0\uc744 \ub193\uc544\uc90c. \uc774 \uc0c1\ud0dc\ub97c \ubcf4\uc5ec\uc904 \uc218 \uc788\ub294 \uac00\uc0c1 \ud68c\uc120\uc774 \uc5c6\uc73c\ubbc0\ub85c \uc544\ubb34 \uc77c\ub3c4 \ubc1c\uc0dd\ud558\uc9c0 \uc54a\uc74c.<\/p>\n<p>\ub124\ud2b8\uc6cc\ud06c \uad00\ub828 \ucc38\uc870 \ud30c\uc77c<br \/>\n\/etc\/services &#8212; The services translation file<br \/>\n\/proc\/net\/dev &#8212; devices information<br \/>\n\/proc\/net\/raw &#8212; RAW socket information<br \/>\n\/proc\/net\/tcp &#8212; TCP socket information<br \/>\n\/proc\/net\/udp &#8212; UDP socket information<br \/>\n\/proc\/net\/igmp &#8212; IGMP multicast information<br \/>\n\/proc\/net\/unix &#8212; Unix domain socket information<br \/>\n\/proc\/net\/ipx &#8212; IPX socket information<br \/>\n\/proc\/net\/ax25 &#8212; AX25 socket information<br \/>\n\/proc\/net\/appletalk &#8212; DDP (appletalk) socket information<br \/>\n\/proc\/net\/nr &#8212; NET\/ROM socket information<br \/>\n\/proc\/net\/route &#8212; Kernel IP routing information<br \/>\n\/proc\/net\/ax25_route &#8212; Kernel AX25 routing information<br \/>\n\/proc\/net\/ipx_route &#8212; Kernel IPX routing information<br \/>\n\/proc\/net\/nr_nodes &#8212; Kernel NET\/ROM nodelist<br \/>\n\/proc\/net\/nr_neigh &#8212; Kernel NET\/ROM neighbours<br \/>\n\/proc\/net\/ip_masquerade &#8212; Kernel masqueraded connections<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; netstat \uc0ac\uc6a9\ubc95 netstat \ub97c \uc790\uc8fc \uadf8\ub9ac\uace0 \ub9ce\uc774 \uc0ac\uc6a9\ud558\ub294\ub370 \uc880 \uad6c\uccb4\uc801\uc778 \ubc29\ubc95\uc744 \uc815\ub9ac\ud574\ub454\ub2e4. \uc5f4\ub824 \uc788\ub294 \ubaa8\ub4e0 \ud3ec\ud2b8 ]# netstat -nap LISTEN \ub418\ub294 \ubaa8\ub4e0 \ud3ec\ud2b8 ]# netstat -l ]# netstat -nap | grep LISTEN \ubaa8\ub4e0 \uc11c\ube44\uc2a4 \ub3d9\uc2dc \uc811\uc18d\uc790 \uc218 ]# netstat &hellip; <a href=\"https:\/\/apollo89.com\/wordpress\/?p=537\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[527,661],"tags":[358,1063,1064,143],"class_list":["post-537","post","type-post","status-publish","format-standard","hentry","category-network","category-system","tag-netstat","tag-proc","tag-service","tag-143"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>netstat \uc0ac\uc6a9\ubc95\uacfc \ub124\ud2b8\uc6cc\ud06c \uad00\ub828 \ucc38\uc870 \ud30c\uc77c - Apollo89.com<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/apollo89.com\/wordpress\/?p=537\" \/>\n<meta property=\"og:locale\" content=\"ko_KR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"netstat \uc0ac\uc6a9\ubc95\uacfc \ub124\ud2b8\uc6cc\ud06c \uad00\ub828 \ucc38\uc870 \ud30c\uc77c - Apollo89.com\" \/>\n<meta property=\"og:description\" content=\"&nbsp; netstat \uc0ac\uc6a9\ubc95 netstat \ub97c \uc790\uc8fc \uadf8\ub9ac\uace0 \ub9ce\uc774 \uc0ac\uc6a9\ud558\ub294\ub370 \uc880 \uad6c\uccb4\uc801\uc778 \ubc29\ubc95\uc744 \uc815\ub9ac\ud574\ub454\ub2e4. \uc5f4\ub824 \uc788\ub294 \ubaa8\ub4e0 \ud3ec\ud2b8 ]# netstat -nap LISTEN \ub418\ub294 \ubaa8\ub4e0 \ud3ec\ud2b8 ]# netstat -l ]# netstat -nap | grep LISTEN \ubaa8\ub4e0 \uc11c\ube44\uc2a4 \ub3d9\uc2dc \uc811\uc18d\uc790 \uc218 ]# netstat &hellip; Continue reading &rarr;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/apollo89.com\/wordpress\/?p=537\" \/>\n<meta property=\"og:site_name\" content=\"Apollo89.com\" \/>\n<meta property=\"article:published_time\" content=\"2012-05-30T04:02:41+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2013-02-20T23:32:36+00:00\" \/>\n<meta name=\"author\" content=\"apollo89\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\uae00\uc4f4\uc774\" \/>\n\t<meta name=\"twitter:data1\" content=\"apollo89\" \/>\n\t<meta name=\"twitter:label2\" content=\"\uc608\uc0c1 \ub418\ub294 \ud310\ub3c5 \uc2dc\uac04\" \/>\n\t<meta name=\"twitter:data2\" content=\"1\ubd84\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/apollo89.com\\\/wordpress\\\/?p=537#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/apollo89.com\\\/wordpress\\\/?p=537\"},\"author\":{\"name\":\"apollo89\",\"@id\":\"https:\\\/\\\/apollo89.com\\\/wordpress\\\/#\\\/schema\\\/person\\\/93f56825cac3b2f18e5f107995066c82\"},\"headline\":\"netstat \uc0ac\uc6a9\ubc95\uacfc \ub124\ud2b8\uc6cc\ud06c 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