{"id":32229,"date":"2026-03-12T22:06:44","date_gmt":"2026-03-12T13:06:44","guid":{"rendered":"https:\/\/smc-secu.net\/?p=32229"},"modified":"2026-03-13T21:48:01","modified_gmt":"2026-03-13T12:48:01","slug":"null4u-smctf-%ec%9a%b4%ec%98%81%ec%8b%9c-%ec%82%ac%ec%96%91-%ea%b4%80%eb%a0%a8-discussion","status":"publish","type":"post","link":"https:\/\/smc-secu.net\/?p=32229","title":{"rendered":"Null4U – SMCTF \uc6b4\uc601\uc2dc \uc0ac\uc591 \uad00\ub828 Discussion"},"content":{"rendered":"

– SCA CTF\uc5d0\uc11c \uccad\uc18c\ub144\ubd80 \ubfd0\ub9cc \uc544\ub2c8\ub77c \ub300\ud559\/\uc131\uc778\ubd80\ub3c4 \ubc1b\uc744 \uc608\uc815\uc774\ub77c \uae30\uc874\ubcf4\ub2e4 \ub9ac\uc18c\uc2a4\ub97c \ub109\ub109\ud558\uac8c \ubc1b\uc544\uc57c\ud568
\n– \uc9c0\uc6d0\uc744 \ub109\ub109\ud558\uac8c \ubc1b\uc73c\uba74 \uac00\uc7a5 \ubca0\uc2a4\ud2b8\uc9c0\ub9cc \ucd5c\uc545\uc758 \uacbd\uc6b0\ub97c \uc0dd\uac01\ud574\uc11c \uac70\uc758 \ubc1b\uc9c0 \ubabb\ud55c\ub2e4\uace0 \uac00\uc815
\n– => \uc9c0\uc6d0\uc744 \ubc1b\ub358 \ubc1b\uc9c0 \uc54a\ub358 \uc778\ud504\ub77c\ub294 \uc548\uc815\uc801 + \ucd5c\uc18c\ud55c\uc758 \ube44\uc6a9 \ub458\ub2e4 \ucc59\uaca8\uc57c\ud568..<\/p>\n

– \uc57d 150\uba85 \uc815\ub3c4\uc758 \uaddc\ubaa8\ub85c \uc608\uc0c1\ub428.
\n– DB(PostgreSQL\/Redis)\ub97c RDS\/ElastiCache\ub85c \ubd84\ub9ac\ud574\ub458\uac70\uc784
\n– \uc800\ubc88 \uc6b4\uc601\ub54c OS\/\ucee4\ub110\uc5d0\uc11c \uc4f0\ub85c\ud2c0\uc774 \ub0ac\ub358\uac8c \uc544\ub9c8 SQLite \uac19\uc740 \ud30c\uc77c DBMS\uc5d0 IO \ubb38\uc81c\uc774\uc9c0 \uc54a\uc744\uae4c \uc0dd\uac01\ud568. => \uc774\uac74 \ubb38\uc81c \uc5c6\uc744 \uac83\uc73c\ub85c \uc608\uc815<\/p>\n

– \uac00\uc7a5 \uc911\uc694\ud55c\uac8c EKS \ub178\ub4dc \uc131\ub2a5\uc784.. \uc77c\ub2e8 \uae30\ubcf8\uc801\uc73c\ub85c \uba54\uc778 \ubc31\uc5d4\ub4dc \uc11c\ube44\uc2a4 + Container Provisioner(\uc774\ud558 CP) \ub9c8\uc774\ud06c\ub85c\uc11c\ube44\uc2a4\ub85c \ubd84\ub958(\ube44\uc911 70% 30% \uc815\ub3c4)
\n– \ubc31\uc5d4\ub4dc \uc804\uc6a9 \ub178\ub4dc\ub294 ARM, \uc2a4\ud0dd \uc804\uc6a9 \ub178\ub4dc\ub294 AMD\/x86-64 \uae30\ubc18\uc73c\ub85c \uad6c\uc131
\n– ==> Graviton3 \uae30\ubc18 c7g.large(2 vCPU\/4GiB) 4\uac1c\ub85c \uad6c\uc131\ud558\uba74 \ub109\ub109\ud568. (8 vCPU\/16GiB)
\n– \uc548\uc815\uc801\uc73c\ub85c \ubcf4\uba74 20% \uc815\ub3c4 \uc5ec\uc720\ub97c \ub46c\uc11c 6.4 vCPU, 12.8 GB \ub77c\uace0 \uc0dd\uac01\ud558\uba74 \ub418\ub294\ub370 \uc774 \uc815\ub3c4\ub3c4 \ub109\ub109\ud568. (150\uba85 \uc815\ub3c4 \uaddc\ubaa8\ub77c\uba74)<\/p>\n

– Deployment replicas\ub294 \uba54\uc778 \ubc31\uc5d4\ub4dc 4 replicas, Container Provisioner 2 replicas <– \uc59c \ubd84\uc0b0 \uad73\uc774 \uc548\ud574\ub3c4\ub428. \uadf8\ub798\ub3c4 2\uac1c\ub85c \ubd84\uc0b0\ud574\ub480\uc74c
\n– Burstable QoS\ub85c \ub450\uae30 \uc704\ud574 requests \uc124\uc815\ud560\uac70\uc784. cpu: 400m \/ memory: 512Mi \uc815\ub3c4? (\uc804\uccb4 “\ucd5c\uc18c” 1.6 vCPU\/2 GiB)
\n– CP\ub294 \uc808\ubc18 \uc774\ud558\ub85c \ubcf4\uace0 cpu: 150m \/ memory: 256Mi (\uc804\uccb4 \ucd5c\uc18c 300m\/512 MiB)
\n– \ud1a0\ud0c8 vCPU 1.9, \uba54\ubaa8\ub9ac 2.5GB\ub97c \ucd5c\uc18c\ub85c \uc7a1\uace0 \ub4e4\uc5b4\uac10. \uc5ec\uc720\ub294 \ub9e4\uc6b0 \ucda9\ubd84 + Burstable QoS\ub77c\uc11c \uc548\uc815\uc801\uc77c \ub4ef?
\n– => \ud558\ub2e4\uac00 \ubc84\ubc85\uc774\uba74 Terraform \ud55c\uc904 \uc218\uc815\ud574\uc11c \uc6cc\ucee4 \ub178\ub4dc \uc218 \ub298\ub824<\/p>\n

– \ubb38\uc81c\ub294 \uc2a4\ud0dd\uc744 \uad74\ub9ac\uae30 \uc704\ud55c \uc2a4\ud0dd \uc804\uc6a9 \ub178\ub4dc\uc778\ub370..
\n– \uc544\uc9c1 \ubb38\uc81c \uc2a4\ud399\uc744 \ubab0\ub77c\uc11c \ub300\ucda9 \ud3c9\uade0 50m 64MiB \uc0ac\uc591\uc774\ub77c\uace0 \uac00\uc815\ud558\uaca0\uc74c.
\n– \ucd5c\uc545\uc758 \uc2dc\ub098\ub9ac\uc624\ub97c \uac00\uc815\ud558\uc5ec \uac1c\uc778\ub2f9 2\uac1c\uc758 \uc2a4\ud0dd \uc81c\ud55c = \ucd1d 300\uac1c\uc758 \uc2a4\ud0dd
\n– 50m x 300 = 15000m = 15 vCPU, 64Mi x 300 = 19200Mi = 18.75 GB
\n– 20% \uc815\ub3c4 \uc5ec\uc720\ub97c \ub450\uba74 \ud1a0\ud0c8 18 vCPU, 24 GB \uc815\ub3c4?
\n– AMD EPYC <– \uc774\uac70 \uc800\ub834\ud568. c6a.2xlarge 3\uac1c \uc4f0\uba74 \ub300\ucda9 24 vCPU \/ 48 GB \uc815\ub3c4\uc758 \ub9ac\uc18c\uc2a4\uac00 \ubcf4\uc7a5\ub428
\n– Max Pods (ENI \ud560\ub2f9 \uac00\ub2a5\ud55c IP \uc218)\uac00 \uc880 \uc560\ub9e4\ud55c\ub370.. Prefix Delegation\ub97c \ud0ac\uae4c? -> \uadf8\ub0e5 \ucd94\ud6c4 \ud300 \ub2e8\uc704\ub85c \uc2a4\ud0dd \uc81c\ud55c\ub418\uac8c \ud558\ub294\uac8c \ub098\uc744\ub4ef;;
\n– \uc544\ubb34\ud2bc c6a.2xlarge \uc774\uac70 3\uac1c\uba74 \ucda9\ubd84\ud568. => \uadfc\ub370 \uc11c\uc6b8 \ub9ac\uc804\uc5d0 \uc5c6\ub124 => c6i.2xlarge \uc774\uac78\ub85c \ub300\uc2e0 \u3131
\n– \uadfc\ub370 \uc6f9 \ubb38\uc81c\ub294 \ub9ac\uc18c\uc2a4\ub97c \ub9ce\uc774 \uba39\uc5b4\uc11c \ubb38\uc81c \ub9cc\ub4e4\uc5b4\uc9c0\uba74 \ub2e4\uc2dc \uace0\ubbfc\ud574\ubd10\uc57c \ud560\ub4ef. \uc140\ub808\ub2c8\uc6c0\uc774\ub098 puppeteer \uc774\ub7f0\uac70 \uc4f0\uba74 \ub9ac\uc18c\uc2a4 \uc694\uad6c\ub7c9\uc774 \ud655 \uc62c\ub77c\uac10 \ucc38\uace0\ubc14\ub77c\uba70 \ub09c\ubc1c\ud558\uc9c4 \uc54a\uae30\ub97c
\n– \ub124\ud2b8\uc6cc\ud06c\uac00 \ubb38\uc81c\ub2e4.. \ub178\ub4dc ENI \ub9c8\ub2e4 \ucd5c\ub300 Pod \uac1c\uc218\uac00 \uc815\ud574\uc838\uc788\uc5b4\uc11c.. <– \uc774\uac74 \uc2a4\ud0dd \ub9ac\ubc0b \uc815\ucc45\uc744 \ud300 \ub2e8\uc704\ub85c \ubc14\uafb8\uac70\ub098 \ud574\uc11c \ubc14\uafd4\ubd10\uc57c\ud560\ub4ef<\/p>\n

\uadf8\ub9ac\uace0 \ub9e4\uc6b0 \uc911\uc694\ud55c\uac70. "\uc2a4\ud0dd \ub9ac\ubc0b\uc744 \uac1c\uc778 \uae30\uc900\uc73c\ub85c \ud560\uc9c0, \ud300 \uae30\uc900\uc73c\ub85c \ud560\uc9c0" => \uc774\uac70 \ucd5c\uc545\uc758 \uc2dc\ub098\ub9ac\uc624 \uac00\uc815\uc73c\ub85c \ubcf8\ub2e4\uba74 \ucc28\uc774\uac00 \uc5c4\uccad \ucee4\uc9d0.. \ud300 \ub2e8\uc704\ub85c \uc2a4\ud0dd \uc81c\ud55c \uac78\uc5b4\ub450\ub294\uac8c \uc88b\uae34 \ud560\ub4ef. ex) \ud300\ub2f9 \ucd5c\ub300 3\uac1c => \uadf8\ub7fc \ucd5c\uc545\uc758 \uacbd\uc6b0 \ub300\ucda9 \ucd5c\ub300 120\uac1c \uc815\ub3c4\uc758 \uc2a4\ud0dd\uc774 \ud544\uc694\ud558\uc9c0 \uc54a\uc744\uae4c? \uc720\uc800 \ub2e8\uc704\ub77c\uba74 \ucd5c\uc18c 150\uac1c, 2\uac1c\uc529 \uc8fc\uba74 \ucd5c\uc18c 300\uac1c\uc529 \ud544\uc694\ud55c\ub370 \uadf8\ub7fc \ub178\ub4dc \uc0ac\uc591\uc744 \uc904\ub54c \ucc28\uc774\uac00 \uc5c4\uccad \ucee4\uc9c0\uac8c\ub428.<\/p>\n

\uac1c\uc778\uc73c\ub85c \ud55c\ub2e4\uba74 \uac1c\uc778\ub2f9 \uc2a4\ud0dd 1\uac1c\uc529\uc73c\ub85c \uc81c\ud55c\ud558\ub294\uac8c \ud655\uc2e4\ud560\ub4ef
\n=> \uc5b4\ucc28\ud53c \uc2a4\ud0dd \ub9cc\ub4dc\ub294\uac70 \ub808\uc774\ud2b8\ub9ac\ubc0b 1\ubd84\uc778\ub370 \uadf8\ub0e5 \ud574\ub77c.. AI \ub538\uae4d\uc73c\ub85c \ubcd1\ub82c\ub85c \ubb38\uc81c \ud480\uc5b4\uc11c \uc81c\ucd9c\ud558\ub294\uac74 \uc758\ub3c4\uac00 \uc544\ub2c8\uc600\uae30 \ub54c\ubb38\uc5d0 \uad1c\ucc2e\uc744\ub4ef?<\/p>\n

—<\/p>\n

\uc544\ubb34\ud2bc \ub300\ucda9 EKS \uace0\uc815 \ube44\uc6a9\uae4c\uc9c0 \ud3ec\ud568\ud558\uba74 24\uc2dc\uac04 \ub531 \ud558\ub8e8\ub9cc \uc6b4\uc601\ud55c\ub2e4\uace0 \uac00\uc815\ud558\uba74<\/p>\n

– c6i.2xlarge x 3 : 3 x 0.384 x 24 = $27.65 \/ 24\uc2dc\uac04
\n– c7g.large x 4 : 4 x 0.0816 x 24 = $7.83 \/ 24\uc2dc\uac04
\n– EKS \ud074\ub7ec\uc2a4\ud130\ub294 \uc2dc\uac04\ub2f9 0.1$ \uace0\uc815 = $2.40 \/ 24\uc2dc\uac04
\n==> $37.88 \/ 24\uc2dc\uac04,,, \ud658\uc728 \uc544\uc774\uace0; 24\uc2dc\uac04 \uad74\ub9ac\uba74 \uc774\ub860\uc801\uc73c\ub85c 56102.55\uc6d0\uc774\ub77c\uace0 \ud568 \uc774\uc815\ub3c4\uba74 \uad1c\ucc2e\uc9c0 \uc54a\uc744\uae4c? \uac1c\uc778 \ubd80\ub2f4\ud574\ub3c4..<\/p>\n

\uadfc\ub370 \ub300\ucda9 \uc774\ub7f0\uac83\ub3c4 \uace0\ub824\ud574\uc57c\ud568.. \uadf8\ub0e5 <\/p>\n

– EBS \ubcfc\ub968 (\uac70\uc758 \uc548\ub4ec)
\n– NAT Gateway (\uc774\uac8c \uc880 \ubb38\uc81c\uc784.. \uc880 \ub9ce\uc774 \ube44\uc2fc \uc560\uc784)
\n– NLB\/ALB
\n– \ub370\uc774\ud130 \ud2b8\ub79c\uc2a4\ud37c \ube44\uc6a9 (AWS \ud2b9\uc720\uc758 \uac00\uaca9 \ucc3d\ub82c)
\n– \ud37c\ube14\ub9ad IPv4 \uc694\uae08<\/p>\n

RDS \/ ElastiCache\ub294 \ub458\ub2e4 \ubd84\uc0b0\uae4c\uc9c4 \uc548\ud574\ub3c4 \ub418\uace0 \uadf8\ub0e5 PostgreSQL RDS\ub294 db.t4g.medium, Redis\ub294 cache.t4g.small \uc815\ub3c4\uba74 \ub420\ub4ef.
\n\uadf8\ub7ec\uba74 \ubb50 \ub300\ucda9 24\uc2dc\uac04 \uae30\uc900\uc73c\ub85c 3~4 \ub2ec\ub7ec \ub098\uc62c\ub4ef? \ubd88\uc548\ud558\uba74 \ubcc4\ub85c \uc548\ube44\uc2f8\ub2c8\uae50 \uc0ac\uc591 1.5~2\ubc30\ub85c \ub192\uc774\uba74 \ub420\ub4ef. \uadfc\ub370 \ubd80\ud558\uac00 \ub9ce\uc9c4 \uc54a\uc744\ub4ef?<\/p>\n

\ucc38\uace0\ub85c EC2 \uc5d0\uc11c T \uc2dc\ub9ac\uc988(\ud328\ubc00\ub9ac)\ub294 Burstable\ub77c\uace0 \ud574\uc11c CPU \uc0ac\uc6a9\ub7c9\uc774 \uc801\uc744\ub54c \ud06c\ub808\ub527\uc744 \uc801\ub9bd\ud558\uace0 \ubd80\ud558\uac00 \ub9ce\uc544\uc9c0\uba74 \ud06c\ub808\ub527\uc744 \uc18c\ube44\ud574\uc11c \uc131\ub2a5\uc744 \uc54c\uc544\uc11c \ub192\ud798. \uadf8\ub098\ub9c8 \ubd80\ud558 \ub9ce\uc744\ub54c\uac00 \uc2a4\ucf54\uc5b4\ubcf4\ub4dc \uc774\ub7f0\uac70 \uc870\ud68c\ud560\ub54c\uc774\uc9c0 \uc54a\uc744\uae4c? \uc2a4\ud0dd \uc81c\uc678\ud558\uace0.<\/p>\n

\ub9ce\uc544\ubd24\uc790 10\ub9cc\uc6d0 \ub0b4\uc678\ub85c \ub098\uc624\uc9c0 \uc54a\uc744\uae4c @@ \/\/ \uc560\ub4e4\ud55c\ud14c \ubc25 \ud55c\ubc88 \uc0ac\uc92c\ub2e4\uce58\uace0 \uac1c\uc778 \ubd80\ub2f4 + \uc9c0\uc6d0 \ubc1b\uc73c\uba74 \ub098\ub984 \ud560\ub9cc\ud560\ub4ef..<\/p>\n

\uc544\uae4c \ub9d0\ud55c ENI Pod IP \ubd80\uc871\ud55c\uac74 Prefix delegation\ub85c \ud574\uacb0 \ud574\ubcf4\uac70\ub098 \uc2a4\ud0dd \uc81c\ud55c \uc815\ucc45\uc744 \uc720\uc800\uac00 \uc544\ub2cc \ud300 \ub2e8\uc704\ub85c \ubc14\uafd4\ubcf4\ub294\uac78\ub85c \ud558\uc790.
\n=> \uc774\uac70 \ud1a0\uae00\ud560 \uc218 \uc788\uac8c \ub9cc\ub4e4\uae30? \uad1c\ucc2e\uc740\ub4ef. <\/p>\n

DB \ucee4\ub125\uc158 \ubb38\uc81c\ub791 NodePort \ubd80\uc871 \ubb38\uc81c\ub294 \uad1c\ucc2e\uc74c. \ucee4\ub125\uc158 \ubb38\uc81c \uc0dd\uae38\uc77c\ub3c4 \uc5c6\uc9c0\ub9cc \uc788\uc5b4\ub3c4 RDS Proxy \uc4f0\uba74 \uadf8\ub9cc\uc774\uc57c~~<\/p>\n

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<\/div>\n","protected":false},"excerpt":{"rendered":"

– SCA CTF\uc5d0\uc11c \uccad\uc18c\ub144\ubd80 \ubfd0\ub9cc \uc544\ub2c8\ub77c \ub300\ud559\/\uc131\uc778\ubd80\ub3c4 \ubc1b\uc744 \uc608\uc815\uc774\ub77c \uae30\uc874\ubcf4\ub2e4 \ub9ac\uc18c\uc2a4\ub97c \ub109\ub109\ud558\uac8c \ubc1b\uc544\uc57c\ud568 – \uc9c0\uc6d0\uc744 \ub109\ub109\ud558\uac8c \ubc1b\uc73c\uba74 \uac00\uc7a5 \ubca0\uc2a4\ud2b8\uc9c0\ub9cc \ucd5c\uc545\uc758 \uacbd\uc6b0\ub97c \uc0dd\uac01\ud574\uc11c \uac70\uc758 \ubc1b\uc9c0 \ubabb\ud55c\ub2e4\uace0 \uac00\uc815 – => \uc9c0\uc6d0\uc744 \ubc1b\ub358 \ubc1b\uc9c0 \uc54a\ub358 \uc778\ud504\ub77c\ub294 \uc548\uc815\uc801 + \ucd5c\uc18c\ud55c\uc758 \ube44\uc6a9 \ub458\ub2e4 \ucc59\uaca8\uc57c\ud568.. – \uc57d 150\uba85 \uc815\ub3c4\uc758 \uaddc\ubaa8\ub85c \uc608\uc0c1\ub428. – DB(PostgreSQL\/Redis)\ub97c RDS\/ElastiCache\ub85c \ubd84\ub9ac\ud574\ub458\uac70\uc784 –… Continue reading → <\/span><\/a><\/p>\n

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<\/div>\n","protected":false},"author":25,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[116],"tags":[],"class_list":["post-32229","post","type-post","status-publish","format-standard","hentry","category-null4u"],"_links":{"self":[{"href":"https:\/\/smc-secu.net\/index.php?rest_route=\/wp\/v2\/posts\/32229","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/smc-secu.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/smc-secu.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/smc-secu.net\/index.php?rest_route=\/wp\/v2\/users\/25"}],"replies":[{"embeddable":true,"href":"https:\/\/smc-secu.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=32229"}],"version-history":[{"count":25,"href":"https:\/\/smc-secu.net\/index.php?rest_route=\/wp\/v2\/posts\/32229\/revisions"}],"predecessor-version":[{"id":32254,"href":"https:\/\/smc-secu.net\/index.php?rest_route=\/wp\/v2\/posts\/32229\/revisions\/32254"}],"wp:attachment":[{"href":"https:\/\/smc-secu.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=32229"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/smc-secu.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=32229"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/smc-secu.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=32229"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}