{"id":9823,"date":"2019-10-01T12:14:47","date_gmt":"2019-10-01T05:14:47","guid":{"rendered":""},"modified":"2024-06-07T16:11:48","modified_gmt":"2024-06-07T09:11:48","slug":"ntp-amplification-attack-ddos-khuech-dai-thuc-su-nguy-hiem-den-may-chu","status":"publish","type":"post","link":"https:\/\/vnso.vn\/en\/ntp-amplification-attack-ddos-khuech-dai-thuc-su-nguy-hiem-den-may-chu\/","title":{"rendered":"NTP Amplification Attack! DDoS khu\u1ebfch \u0111\u1ea1i th\u1ef1c s\u1ef1 nguy hi\u1ec3m \u0111\u1ebfn M\u00e1y Ch\u1ee7?"},"content":{"rendered":"

T\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i NTP l\u00e0 t\u1ea5n c\u00f4ng DDoS d\u1ef1a tr\u00ean m\u1ed9t l\u01b0\u1ee3ng l\u1edbn c\u00e1c g\u00f3i tin m\u00e0 k\u1ebb t\u1ea5n c\u00f4ng khai th\u00e1c m\u00e1y ch\u1ee7<\/a> Network Time Protocol (NTP) \u0111ang ho\u1ea1t \u0111\u1ed9ng. C\u1ed1 g\u1eafng l\u00e0m cho h\u1ec7 th\u1ed1ng m\u1ea1ng hay server n\u1ea1n nh\u00e2n qu\u00e1 t\u1ea3i. C\u00f9ng v\u1edbi l\u01b0\u1ee3ng l\u1edbn c\u00e1c g\u00f3i tin UDP \u0111\u01b0\u1ee3c khu\u1ebfch \u0111\u1ea1i.<\/span><\/p>\n

1. T\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i NTP th\u1ef1c hi\u1ec7n nh\u01b0 th\u1ebf n\u00e0o?<\/strong><\/span><\/h2>\n

T\u1ea5t c\u1ea3 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i \u0111\u1ec1u khai th\u00e1c s\u1ef1 ch\u00eanh l\u1ec7ch v\u1ec1 b\u0103ng th\u00f4ng c\u1ee7a k\u1ebb t\u1ea5n c\u00f4ng. C\u0169ng nh\u01b0 t\u00e0i nguy\u00ean c\u1ee7a<\/span> n\u1ea1n nh\u00e2n b\u1eb1ng c\u00e1ch g\u1eedi c\u00e1c truy v\u1ea5n nh\u1ecf v\u00e0 nh\u1eadn \u0111\u01b0\u1ee3c c\u00e1c ph\u1ea3n h\u1ed3i l\u1edbn. Khi khu\u1ebfch \u0111\u1ea1i b\u1eb1ng c\u00e1ch cho m\u1ed7i bot trong h\u1ec7 th\u1ed1ng botnet th\u1ef1c hi\u1ec7n c\u00e1c y\u00eau c\u1ea7u nh\u01b0 v\u1eady, k\u1ebb t\u1ea5n c\u00f4ng kh\u00f4ng b\u1ecb ph\u00e1t hi\u1ec7n m\u00e0 hi\u1ec7u qu\u1ea3 r\u1ea5t l\u1edbn.<\/span><\/p>\n

C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DNS flood attacks kh\u00e1c v\u1edbi DNS amplification attacks. Kh\u00e1c v\u1edbi DNS floods, DNS amplification g\u1eedi c\u00e1c request nh\u1ecf \u0111\u1ebfn DNS M\u00e1y Ch\u1ee7 kh\u00f4ng b\u1ea3o m\u1eadt v\u1edbi c\u00e1ch gi\u1ea3 m\u1ea1o IP c\u1ee7a n\u1ea1n nh\u00e2n. DNS server n\u00e0y g\u1eedi c\u00e1c ph\u1ea3n h\u1ed3i l\u1edbn \u0111\u1ebfn n\u1ea1n nh\u00e2n t\u1eeb \u0111\u00f3 k\u1ebb t\u1ea5n c\u00f4ng kh\u00f4ng b\u1ecb ph\u00e1t hi\u1ec7n v\u00e0 t\u0103ng t\u00ednh hi\u1ec7u qu\u1ea3.<\/span><\/p>\n

NTP \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng c\u00f3 k\u1ebft n\u1ed1i internet \u0111\u1ed3ng b\u1ed9 th\u1eddi gian tr\u00ean thi\u1ebft b\u1ecb c\u1ee7a h\u1ecd. B\u1eb1ng c\u00e1ch khai th\u00e1c l\u1ec7nh \u201cmonlist\u201d \u0111\u01b0\u1ee3c b\u1eadt tr\u00ean m\u1ed9t v\u00e0i m\u00e1y ch\u1ee7<\/a> NTP m\u00e0 k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 khu\u1ebfch \u0111\u1ea1i c\u00e1c g\u00f3i tin y\u00eau c\u1ea7u c\u1ee7a h\u1ecd v\u00e0 tr\u1ea3 v\u1ec1 l\u01b0\u1ee3ng l\u1edbn c\u00e1c ph\u1ea3n h\u1ed3i. L\u1ec7nh n\u00e0y m\u1eb7c \u0111\u1ecbnh \u0111\u01b0\u1ee3c b\u1eadt tr\u00ean c\u00e1c thi\u1ebft b\u1ecb c\u0169 v\u00e0 g\u1eedi ph\u1ea3n h\u1ed3i \u0111\u1ebfn 600 IP g\u1eedi y\u00eau c\u1ea7u g\u1ea7n nh\u1ea5t \u0111\u1ebfn m\u00e1y ch\u1ee7 NTP n\u00e0y. V\u1edbi ph\u01b0\u01a1ng th\u1ee9c n\u00e0y c\u00e1c g\u00f3i tin ph\u1ea3n h\u1ed3i s\u1ebd \u0111\u01b0\u1ee3c khu\u1ebfch \u0111\u1ea1i l\u00ean \u0111\u1ebfn 206 l\u1ea7n so v\u1edbi g\u00f3i tin y\u00eau c\u1ea7u. \u0110i\u1ec1u n\u00e0y t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi vi\u1ec7c v\u1edbi 1GB l\u01b0u l\u01b0\u1ee3ng internet k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 g\u1eedi \u0111\u1ebfn 200GB.<\/span><\/p>\n

\"M\u1ed9t

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 M\u1ed9t v\u00ed d\u1ee5 v\u1ec1 t\u1ea5n c\u00f4ng ddos NTP Amplification Attack<\/em><\/p><\/div>\n

T\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i NTP c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 v\u1edbi 4 b\u01b0\u1edbc<\/strong><\/span><\/p>\n

    \n
  1. K\u1ebb t\u1ea5n c\u00f4ng s\u1eed d\u1ee5ng m\u1ea1ng l\u01b0\u1edbi botnet g\u1eedi c\u00e1c g\u00f3i tin UDP v\u1edbi IP gi\u1ea3 m\u1ea1o \u0111\u1ebfn m\u00e1y ch\u1ee7<\/a> NTP b\u1eadt l\u1ec7nh monlist. IP gi\u1ea3 m\u1ea1o n\u00e0y l\u00e0 IP c\u1ee7a n\u1ea1n nh\u00e2n.<\/span><\/li>\n
  2. M\u1ed7i g\u00f3i tin UDP g\u1eedi \u0111\u1ebfn m\u00e1y ch\u1ee7 NTP b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng l\u1ec7nh monlist s\u1ebd tr\u1ea3 v\u1ec1 l\u01b0\u1ee3ng l\u1edbn c\u00e1c ph\u1ea3n h\u1ed3i.<\/span><\/li>\n
  3. M\u00e1y ch\u1ee7 NTP g\u1eedi ph\u1ea3n h\u1ed3i \u0111\u1ebfn IP \u0111\u01b0\u1ee3c gi\u1ea3 m\u1ea1o trong g\u00f3i tin y\u00eau c\u1ea7u v\u1edbi l\u01b0\u1ee3ng l\u1edbn d\u1eef li\u1ec7u.<\/span><\/li>\n
  4. IP nh\u1eadn \u0111\u01b0\u1ee3c qu\u00e1 nhi\u1ec1u ph\u1ea3n h\u1ed3i m\u00e0 m\u00ecnh kh\u00f4ng y\u00eau c\u1ea7u d\u1eabn \u0111\u1ebfn qu\u00e1 t\u1ea3i v\u00e0 t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5<\/span><\/li>\n<\/ol>\n

    2. C\u00e1ch gi\u1ea3m thi\u1ec3u t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i NTP<\/strong><\/span><\/h2>\n

    \u0110\u1ed1i v\u1edbi c\u00e1 nh\u00e2n, c\u00f4ng ty ch\u1ea1y website hay d\u1ecbch v\u1ee5 c\u00e1c c\u00e1ch gi\u1ea3m thi\u1ec3u t\u1ea5n c\u00f4ng r\u1ea5t h\u1ea1n ch\u1ebf. Do l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp t\u0103ng cao h\u1ec7 th\u1ed1ng m\u1ea1ng c\u1ee7a m\u00e1y ch\u1ee7 b\u1ecb \u1ea3nh h\u01b0\u1edfng. Nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 m\u1ea1ng ho\u1eb7c cung c\u1ea5p c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng m\u1ea1ng c\u0169ng c\u00f3 th\u1ec3 kh\u00f4ng x\u1eed l\u00fd \u0111\u01b0\u1ee3c l\u01b0\u1ee3ng d\u1eef li\u1ec7u n\u00e0y d\u1eabn \u0111\u1ebfn b\u1ecb qu\u00e1 t\u1ea3i. Do \u0111\u00f3 c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 s\u1ebd \u0111\u1ea9y t\u1ea5t c\u1ea3 traffic \u0111\u1ebfn m\u00e1y ch\u1ee7 b\u1ecb t\u1ea5n c\u00f4ng v\u00e0o h\u1ed1 \u0111en \u0111\u1ec3 b\u1ea3o v\u1ec7 ch\u00ednh m\u00ecnh. \u0110i\u1ec1u n\u00e0y khi\u1ebfn site c\u1ee7a c\u00e1c c\u00e1c nh\u00e2n, c\u00f4ng ty n\u00e0y offline.<\/span><\/p>\n

    T\u1eaft monlist \u2013 gi\u1ea3m thi\u1ec3u s\u1ed1 l\u01b0\u1ee3ng<\/span> m\u00e1y ch\u1ee7<\/a> NTP h\u1ed7 tr\u1ee3 l\u1ec7nh monlist<\/span><\/strong><\/em><\/h3>\n

    M\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n \u0111\u1ec3 v\u00e1 l\u1ed7 h\u1ed5ng c\u1ee7a monlist l\u00e0 t\u1eaft n\u00f3 \u0111i. T\u1ea5t c\u1ea3 c\u00e1c phi\u00ean b\u1ea3n c\u1ee7a ph\u1ea7n m\u1ec1m NTP cho \u0111\u1ebfn tr\u01b0\u1edbc b\u1ea3n 4.2.7 \u0111\u1ec1u c\u00f3 l\u1ed7 h\u1ed5ng. B\u1eb1ng c\u00e1ch c\u1eadp nh\u1eadt b\u1ea3n 4.2.7 ho\u1eb7c cao h\u01a1n l\u1ec7nh monlist \u0111\u1ec1u b\u1ecb t\u1eaft \u0111i.<\/span><\/p>\n

    Ki\u1ec3m tra IP ngu\u1ed3n \u2013 ng\u0103n ch\u1eb7n c\u00e1c g\u00f3i tin gi\u1ea3 m\u1ea1o \u0111i ra kh\u1ecfi m\u1ea1ng<\/strong><\/em><\/span><\/h3>\n

    B\u1edfi v\u00ec c\u00e1c y\u00eau c\u1ea7u UDP g\u1eedi \u0111i b\u1edfi m\u1ea1ng botnet c\u1ee7a k\u1ebb t\u1ea5n c\u00f4ng \u0111\u1ec1u ph\u1ea3i gi\u1ea3 m\u1ea1o IP ngu\u1ed3n th\u00e0nh IP c\u1ee7a n\u1ea1n nh\u00e2n. M\u1ed9t gi\u1ea3i ph\u00e1p then ch\u1ed1t \u0111\u1ec3 gi\u1ea3m t\u00ednh hi\u1ec7u qu\u1ea3 c\u1ee7a vi\u1ec7c t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i b\u1eb1ng giao th\u1ee9c UDP l\u00e0 c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 m\u1ea1ng (ISP) l\u1ecdc. \u0110\u1ed3ng th\u1eddi lo\u1ea1i b\u1ecf c\u00e1c g\u00f3i tin \u0111i ra v\u1edbi IP gi\u1ea3 m\u1ea1o. N\u1ebfu g\u00f3i tin \u0111i ra kh\u1ecfi m\u1ea1ng v\u1edbi IP ngu\u1ed3n kh\u00e1c v\u1edbi IP trong m\u1ea1ng \u0111\u00f3 th\u00ec ISP s\u1ebd lo\u1ea1i b\u1ecf c\u00e1c g\u00f3i tin n\u00e0y. \u0110\u1ed3ng th\u1eddi g\u1ea7n nh\u01b0 c\u00e1c g\u00f3i tin gi\u1ea3 m\u1ea1o s\u1ebd \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf.<\/span><\/p>\n

    B\u1eb1ng c\u00e1ch t\u1eaft monlist tr\u00ean m\u00e1y ch\u1ee7 NTP v\u00e0 ki\u1ec3m tra IP ngu\u1ed3n tr\u00ean m\u1ea1ng s\u1ebd d\u1eebng \u0111\u01b0\u1ee3c vi\u1ec7c b\u1ecb t\u1ea5n c\u00f4ng t\u1eeb ph\u01b0\u01a1ng th\u1ee9c n\u00e0y.<\/span><\/p>\n

    Xem th\u00eam c\u00e1c g\u00f3i Thu\u00ea M\u00e1y Ch\u1ee7 t\u1ea1i VNSO<\/a><\/p>","protected":false},"excerpt":{"rendered":"

    T\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i NTP l\u00e0 t\u1ea5n c\u00f4ng DDoS d\u1ef1a tr\u00ean m\u1ed9t l\u01b0\u1ee3ng l\u1edbn c\u00e1c g\u00f3i tin m\u00e0 k\u1ebb t\u1ea5n c\u00f4ng khai th\u00e1c m\u00e1y ch\u1ee7 Network Time Protocol (NTP) \u0111ang ho\u1ea1t \u0111\u1ed9ng. C\u1ed1 g\u1eafng l\u00e0m cho h\u1ec7 th\u1ed1ng m\u1ea1ng hay server n\u1ea1n nh\u00e2n qu\u00e1 t\u1ea3i. C\u00f9ng v\u1edbi l\u01b0\u1ee3ng l\u1edbn c\u00e1c g\u00f3i tin UDP \u0111\u01b0\u1ee3c khu\u1ebfch […]<\/p>","protected":false},"author":1,"featured_media":11266,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[156],"tags":[73,157,122,60],"yoast_head":"\nNTP Amplification Attack! DDoS khu\u1ebfch \u0111\u1ea1i th\u1ef1c s\u1ef1 nguy hi\u1ec3m \u0111\u1ebfn M\u00e1y Ch\u1ee7?<\/title>\n<meta name=\"description\" content=\"T\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i NTP l\u00e0 t\u1ea5n c\u00f4ng DDoS d\u1ef1a tr\u00ean m\u1ed9t l\u01b0\u1ee3ng l\u1edbn c\u00e1c g\u00f3i tin m\u00e0 k\u1ebb t\u1ea5n c\u00f4ng khai th\u00e1c m\u00e1y ch\u1ee7 NTP \u0111ang ho\u1ea1t \u0111\u1ed9ng.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/vnso.vn\/en\/ntp-amplification-attack-ddos-khuech-dai-thuc-su-nguy-hiem-den-may-chu\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"NTP Amplification Attack! DDoS khu\u1ebfch \u0111\u1ea1i th\u1ef1c s\u1ef1 nguy hi\u1ec3m \u0111\u1ebfn M\u00e1y Ch\u1ee7?\" \/>\n<meta property=\"og:description\" content=\"T\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i NTP l\u00e0 t\u1ea5n c\u00f4ng DDoS d\u1ef1a tr\u00ean m\u1ed9t l\u01b0\u1ee3ng l\u1edbn c\u00e1c g\u00f3i tin m\u00e0 k\u1ebb t\u1ea5n c\u00f4ng khai th\u00e1c m\u00e1y ch\u1ee7 NTP \u0111ang ho\u1ea1t \u0111\u1ed9ng.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/vnso.vn\/en\/ntp-amplification-attack-ddos-khuech-dai-thuc-su-nguy-hiem-den-may-chu\/\" \/>\n<meta property=\"og:site_name\" content=\"C\u00d4NG NGH\u1ec6 VNSO\u2122\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/VNSO.VN\" \/>\n<meta property=\"article:published_time\" content=\"2019-10-01T05:14:47+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-06-07T09:11:48+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/vnso.vn\/wp-content\/uploads\/2019\/10\/3-1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1039\" \/>\n\t<meta property=\"og:image:height\" content=\"692\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"quocvu\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"quocvu\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/vnso.vn\/ntp-amplification-attack-ddos-khuech-dai-thuc-su-nguy-hiem-den-may-chu\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/vnso.vn\/ntp-amplification-attack-ddos-khuech-dai-thuc-su-nguy-hiem-den-may-chu\/\"},\"author\":{\"name\":\"quocvu\",\"@id\":\"https:\/\/vnso.vn\/#\/schema\/person\/d2e01da61bbe4e9cdad491a13585c000\"},\"headline\":\"NTP Amplification Attack! 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