{"id":14850,"date":"2022-08-22T05:59:00","date_gmt":"2022-08-21T22:59:00","guid":{"rendered":"https:\/\/www.rumahweb.com\/journal\/?p=14850"},"modified":"2022-08-22T17:11:27","modified_gmt":"2022-08-22T10:11:27","slug":"apa-itu-syn-flood-attack-adalah","status":"publish","type":"post","link":"https:\/\/www.rumahweb.com\/journal\/apa-itu-syn-flood-attack-adalah\/","title":{"rendered":"Apa itu Syn Flood Attack dan Cara Mengatasinya"},"content":{"rendered":"\n<p>Banyaknya koneksi SYN ke <a href=\"https:\/\/blog.rumahweb.com\/web-server-adalah\/\" title=\"web server adalah\">web server<\/a> akan menyebabkan web server menjadi berat diakses. Serangan ini termasuk salah satu serangan yang ditujukan untuk DOS. Lalu bagaimana cara mengatasinya? Pada panduan ini, kami akan berbagi cara untuk menangkal SYN flood melalui firewall CSF.<\/p>\n\n\n\n\n\n<p>Sebelum kami bahas cara menangkal SYN flood, terlebih dahulu kami akan menjelaskan apa itu SYN flood dan UDP flood, agar anda memahami jenis serangan DOS yang satu ini. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Pengertian SYN flood attack<\/h2>\n\n\n\n<p>SYN flood adalah suatu tipe serangan DDoS ke server untuk mendapatkan paket ACK dengan volume tinggi, yang bertujuan untuk melemahkan respon pada server. Hampir sama dengan SYN, UDP flood artinya suatu tipe serangan yang memanfaatkan protokol UDP dengan volume yang tinggi, dengan tujuan yang sama yaitu melumpuhkan server. <\/p>\n\n\n\n<p>Berikut tanda-tanda server terkena serangan SYN flood dan UDP flood.<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Aplikasi yang berada dalam server tersebut terasa lebih lambat.<\/li><li>Apabila dilakukan pengecekan traffic internet diserver tersebut, ditemukan traffic tidak wajar dari IP tertentu.<\/li><li>Koneksi internet diserver tersebut akan terasa lebih lambat.<\/li><\/ul>\n\n\n\n<p>Untuk mengatasi kendala tersebut, Anda bisa melakukan pencegahan melalui Firewall. Pada panduan ini, kami akan berbagi cara menangkal SYN flood melalui CSF (ConfigServer Firewall).  Untuk demo, kami menggunakan <a href=\"https:\/\/www.rumahweb.com\/vps-murah\/\" title=\"vps murah\">VPS<\/a> dengan lisensi cPanel.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Menangkal SYN Flood Melalui Firewall<\/h2>\n\n\n\n<p>Berikut adalah cara menangkal SYN flood melalui CSF pada pengguna VPS dengan lisensi cPanel.<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li>Login ke WHM. <br \/>Login dahulu ke WHM dapat dilakukan dari url https:\/\/hostnameserver\/whm atau langung ke port di https:\/\/hostnameserver:2087<\/li><\/ol>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"807\" height=\"523\" src=\"https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf1.png\" alt=\"Login ke cPanel\" class=\"wp-image-14851\" srcset=\"https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf1.png 807w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf1-300x194.png 300w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf1-768x498.png 768w\" sizes=\"auto, (max-width: 807px) 100vw, 807px\" \/><\/figure>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\"><li>Klik menu \u201cConfigServer Security &amp; Firewall\u201d di kategori \u201cPlugins\u201d bagian kiri WHM.<\/li><\/ol>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"361\" height=\"420\" src=\"https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf2.png\" alt=\"Menu CSF di WHM\" class=\"wp-image-14852\" srcset=\"https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf2.png 361w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf2-258x300.png 258w\" sizes=\"auto, (max-width: 361px) 100vw, 361px\" \/><\/figure>\n<\/div>\n\n\n<ol class=\"wp-block-list\" start=\"3\"><li>Untuk <em>mengaktifkan opsi SYN<\/em>, setting pada bagian &#8220;Firewall Configuration&#8221;.<\/li><\/ol>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"739\" height=\"471\" src=\"https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf3.png\" alt=\"Setting Firewall CSF WHM\" class=\"wp-image-14853\" srcset=\"https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf3.png 739w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf3-300x191.png 300w\" sizes=\"auto, (max-width: 739px) 100vw, 739px\" \/><\/figure>\n\n\n\n<ol class=\"wp-block-list\" start=\"4\"><li>Scrool ke bawah, hingga ke bagian &#8220;Port Flood Settings&#8221;. Seting awal ada seperti pada tangkapan layar di bawah ini. Yang dikotak merah adalah seting yang akan kita rubah.<\/li><\/ol>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"732\" height=\"474\" src=\"https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf4.png\" alt=\"Cara Menangkal SYN Flood\" class=\"wp-image-14854\" srcset=\"https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf4.png 732w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf4-300x194.png 300w\" sizes=\"auto, (max-width: 732px) 100vw, 732px\" \/><\/figure>\n\n\n\n<ol class=\"wp-block-list\" start=\"5\"><li>Kita akan menyesuikan setting dengan informasi berikut:<\/li><\/ol>\n\n\n\n<ul class=\"wp-block-list\"><li>SYNFLOOD = ON<\/li><li>SYNFLOOD_RATE = 50\/s<\/li><li>SYNFLOOD_BURST = 75<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"536\" height=\"368\" src=\"https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf5.png\" alt=\"Cara Menangkal SYNFlood\" class=\"wp-image-14855\" srcset=\"https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf5.png 536w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf5-300x206.png 300w\" sizes=\"auto, (max-width: 536px) 100vw, 536px\" \/><\/figure>\n\n\n\n<ol class=\"wp-block-list\" start=\"6\"><li> Scrool ke bagian paling bawah, klik &#8220;Change&#8221; untuk menyimpan perubahan.<\/li><\/ol>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"812\" height=\"350\" src=\"https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf6.png\" alt=\"simpan CSF\" class=\"wp-image-14856\" srcset=\"https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf6.png 812w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf6-300x129.png 300w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf6-768x331.png 768w\" sizes=\"auto, (max-width: 812px) 100vw, 812px\" \/><\/figure>\n\n\n\n<ol class=\"wp-block-list\" start=\"7\"><li>Untuk mengaktifkan UDP Flood masuk ke <strong>Configserver Security and Firewall<\/strong><\/li><\/ol>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1559\" height=\"903\" src=\"https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpflood.png\" alt=\"Cara Menangkal UDPFlood\" class=\"wp-image-31907\" srcset=\"https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpflood.png 1559w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpflood-300x174.png 300w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpflood-1024x593.png 1024w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpflood-768x445.png 768w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpflood-1536x890.png 1536w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpflood-370x214.png 370w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpflood-270x156.png 270w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpflood-570x330.png 570w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpflood-740x429.png 740w\" sizes=\"auto, (max-width: 1559px) 100vw, 1559px\" \/><\/figure>\n\n\n\n<ol class=\"wp-block-list\" start=\"8\"><li>Untuk <em>mengaktifkan opsi UDP Flood<\/em>, cari pada bagian &#8220;Firewall Configuration&#8221;. <\/li><\/ol>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1794\" height=\"899\" src=\"https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpfloodrw-2.png\" alt=\"Cara Menangkal UDP Flood\" class=\"wp-image-31908\" srcset=\"https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpfloodrw-2.png 1794w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpfloodrw-2-300x150.png 300w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpfloodrw-2-1024x513.png 1024w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpfloodrw-2-768x385.png 768w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpfloodrw-2-1536x770.png 1536w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpfloodrw-2-370x185.png 370w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpfloodrw-2-270x135.png 270w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpfloodrw-2-570x286.png 570w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpfloodrw-2-740x371.png 740w\" sizes=\"auto, (max-width: 1794px) 100vw, 1794px\" \/><\/figure>\n\n\n\n<ol class=\"wp-block-list\" start=\"9\"><li>Scroll ke bawah atau mencari dengan ctrl +f dengan kata kunci &#8220;<strong>UDPFLOOD<\/strong>&#8220;.<\/li><\/ol>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1238\" height=\"432\" src=\"https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpfloodrw-3.png\" alt=\"mengubah firewall untuk UDP Flood\" class=\"wp-image-31909\" srcset=\"https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpfloodrw-3.png 1238w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpfloodrw-3-300x105.png 300w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpfloodrw-3-1024x357.png 1024w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpfloodrw-3-768x268.png 768w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpfloodrw-3-370x129.png 370w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpfloodrw-3-270x94.png 270w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpfloodrw-3-570x199.png 570w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/udpfloodrw-3-740x258.png 740w\" sizes=\"auto, (max-width: 1238px) 100vw, 1238px\" \/><\/figure>\n\n\n\n<ol class=\"wp-block-list\" start=\"10\"><li>Silahkan sesuaikan setting pada udplood. <\/li><\/ol>\n\n\n\n<ul class=\"wp-block-list\"><li>UDPFLOOD : on<\/li><li>UDPFLOOD_LIMIT : 50\/s<\/li><li>UDPFLOOD_BURST : 100<\/li><\/ul>\n\n\n\n<ol class=\"wp-block-list\" start=\"11\"><li>Setelah perubahan tersebut silahkan scroll ke paling bawah kembali dengan klik CHANGE seperti point 6.<\/li><li>Restart Firewall CSF untuk mengaktifkan setting.<\/li><\/ol>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"488\" height=\"370\" src=\"https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf7.png\" alt=\"restart csf\" class=\"wp-image-14857\" srcset=\"https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf7.png 488w, https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2020\/03\/syncsf7-300x227.png 300w\" sizes=\"auto, (max-width: 488px) 100vw, 488px\" \/><\/figure>\n\n\n\n<p>Demikian artikel kami untuk mengatasi atau menangkal <span style=\"text-decoration: underline;\">SYN flood attack di VPS cPanel<\/span>. Semoga bermanfaat.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Banyaknya koneksi SYN ke web server akan menyebabkan web server menjadi berat diakses. Serangan ini termasuk salah satu serangan yang ditujukan untuk DOS. Lalu bagaimana cara mengatasinya? Pada panduan ini, kami akan berbagi cara untuk menangkal SYN flood melalui firewall CSF. Sebelum kami bahas cara menangkal SYN flood, terlebih dahulu kami akan menjelaskan apa itu [&hellip;]<\/p>\n","protected":false},"author":325,"featured_media":31942,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[1816],"tags":[18,1086,910,1159,1817],"class_list":{"0":"post-14850","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-security","8":"tag-cpanel","9":"tag-csf","10":"tag-firewall","11":"tag-synflood","12":"tag-udpflood"},"aioseo_notices":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/www.rumahweb.com\/journal\/wp-content\/uploads\/2022\/08\/Banner-Apa-itu-Syn-Flood-Attack-dan-Cara-Mengatasinya.png","jetpack_shortlink":"https:\/\/wp.me\/p8n3G7-3Rw","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.rumahweb.com\/journal\/wp-json\/wp\/v2\/posts\/14850","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.rumahweb.com\/journal\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.rumahweb.com\/journal\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.rumahweb.com\/journal\/wp-json\/wp\/v2\/users\/325"}],"replies":[{"embeddable":true,"href":"https:\/\/www.rumahweb.com\/journal\/wp-json\/wp\/v2\/comments?post=14850"}],"version-history":[{"count":0,"href":"https:\/\/www.rumahweb.com\/journal\/wp-json\/wp\/v2\/posts\/14850\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.rumahweb.com\/journal\/wp-json\/wp\/v2\/media\/31942"}],"wp:attachment":[{"href":"https:\/\/www.rumahweb.com\/journal\/wp-json\/wp\/v2\/media?parent=14850"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.rumahweb.com\/journal\/wp-json\/wp\/v2\/categories?post=14850"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.rumahweb.com\/journal\/wp-json\/wp\/v2\/tags?post=14850"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}