{"id":9747,"date":"2016-07-25T14:11:15","date_gmt":"2016-07-25T07:11:15","guid":{"rendered":""},"modified":"2024-06-07T16:12:19","modified_gmt":"2024-06-07T09:12:19","slug":"gioi-thieu-ve-he-thong-chong-ddos","status":"publish","type":"post","link":"https:\/\/vnso.vn\/en\/gioi-thieu-ve-he-thong-chong-ddos\/","title":{"rendered":"Gi\u1edbi thi\u1ec7u v\u1ec1 h\u1ec7 th\u1ed1ng ch\u1ed1ng DDOS"},"content":{"rendered":"<h3><strong>1.Gi\u1edbi Thi\u1ec7u DDOS :<\/strong><\/h3>\n<p><strong>A.DDOS l\u00e0 g\u00ec? :<\/strong><\/p>\n<p>DDoS l\u00e0\u00a0ki\u1ec3u t\u1ea5n c\u00f4ng l\u00e0m cho m\u1ee5c ti\u00eau,\u00a0l\u00e0 c\u00e1c trang web, d\u1ecbch v\u1ee5 tr\u1ef1c tuy\u1ebfn, tr\u1edf n\u00ean qu\u00e1 t\u1ea3i. Ng\u01b0\u1eddi d\u00f9ng g\u1eb7p kh\u00f3 kh\u0103n, hay th\u1eadm ch\u00ed kh\u00f4ng th\u1ec3 truy c\u1eadp v\u00e0o c\u00e1c trang web, d\u1ecbch v\u1ee5 n\u00e0y<\/p>\n<p><!--more--><\/p>\n<p><strong>B.C\u00e1c D\u1ea1ng T\u1ea5n C\u00f4ng DDOS Ph\u1ed5 Bi\u1ebfn :<\/strong><\/p>\n<p>&nbsp;<\/p>\n<ul>\n<li><strong><u>Ping Of Death.<\/u><\/strong><\/li>\n<\/ul>\n<p>M\u1ed9t s\u1ed1 m\u00e1y t\u00ednh s\u1ebd b\u1ecb ng\u01b0ng h\u1ecdat \u0111\u1ed9ng, Reboot ho\u1eb7c b\u1ecb crash khi b\u1ecb nh\u1eadn nh\u1eefng g\u00f3i d\u1eef li\u1ec7u ping c\u00f3 k\u00edch th\u01b0\u1edbc l\u1edbn.<\/p>\n<p>V\u00ed d\u1ee5 nh\u01b0 : ping \u0111\u1ecba ch\u1ec9 -n 1000<br \/>\ntrong \u0111\u00f3 : s\u1ed1 1000 l\u00e0 s\u1ed1 l\u1ea7n g\u1eedi g\u00f3i d\u1eef li\u1ec7u.<\/p>\n<p>&nbsp;<\/p>\n<ul>\n<li><strong><u>TCP\/SYN Flooding:<\/u><\/strong><\/li>\n<\/ul>\n<p>B\u01b0\u1edbc 1: Kh\u00e1ch h\u00e0ng g\u1eedi m\u1ed9t TCP SYN packet \u0111\u1ebfn c\u1ed5ng d\u1ecbch v\u1ee5 c\u1ee7a m\u00e1y ch\u1ee7<\/p>\n<p>Kh\u00e1ch h\u00e0ng -&gt; SYN Packet -&gt; M\u00e1y ch\u1ee7<\/p>\n<p>B\u01b0\u1edbc 2 : M\u00e1y ch\u1ee7 s\u1ebd ph\u1ea3n h\u1ed3i l\u1ea1i kh\u00e1ch h\u00e0ng b\u1eb1ng 1 SYN\/ACK Packet v\u00e0 ch\u1edd nh\u1eadn m\u1ed9t 1 ACK packet t\u1eeb kh\u00e1ch h\u00e0ng<\/p>\n<p>M\u00e1y ch\u1ee7 -&gt; SYN\/ACK Packet -&gt; Kh\u00e1ch h\u00e0ng<\/p>\n<p>B\u01b0\u1edbc 3: Kh\u00e1ch h\u00e0ng ph\u1ea3n h\u1ed3i l\u1ea1i M\u00e1y ch\u1ee7 b\u1eb1ng m\u1ed9t ACK Packet v\u00e0 vi\u1ec7c k\u1ebft n\u1ed1i h\u00f2an t\u1ea5t Kh\u00e1ch h\u00e0ng v\u00e0 m\u00e1y ch\u1ee7 th\u1ef1c hi\u1ec7n c\u00f4ng vi\u1ec7c trao \u0111\u1ed5i d\u1eef li\u1ec7u v\u1edbi nhau.<\/p>\n<p>Kh\u00e1ch h\u00e0ng -&gt; ACK Packet -&gt; M\u00e1y ch\u1ee7<\/p>\n<p>&nbsp;<\/p>\n<p>Trong tr\u01b0\u1eddng h\u1ee3p Hacker th\u1ef1c hi\u1ec7n vi\u1ec7c SYN Flooding b\u1eb1ng c\u00e1ch g\u1eedi t\u1edbi t\u1ea5p, h\u00e0ng lo\u1ea1t TCP SYN packet \u0111\u1ebfn c\u1ed5ng d\u1ecbch v\u1ee5 c\u1ee7a m\u00e1y ch\u1ee7 s\u1ebd l\u00e0m m\u00e1y ch\u1ee7 b\u1ecb qu\u00e1 t\u1ea3i v\u00e0 kh\u00f4ng c\u00f2n kh\u1ea3 n\u0103ng \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c n\u1eefa<\/p>\n<p>&nbsp;<\/p>\n<ul>\n<li><u><strong>UDP\/ICMP Flooding:<\/strong><\/u><\/li>\n<\/ul>\n<p><u><br \/>\n<\/u>Hacker th\u1ef1c hi\u1ec7n b\u1eb1ng c\u00e1ch g\u1eedi 1 s\u1ed1 l\u01b0\u1ee3ng l\u1edbn c\u00e1c g\u00f3i tin UDP\/ICMP c\u00f3 k\u00edch th\u01b0\u1edbc l\u1edbn \u0111\u1ebfn h\u1ec7 th\u1ed1ng m\u1ea1ng, khi h\u1ec7 th\u1ed1ng m\u1ea1ng ch\u1ecbu ph\u1ea3i s\u1ef1 t\u1ea5n c\u00f4ng n\u00e0y s\u1ebd b\u1ecb qua t\u1ea3i v\u00e0 chi\u1ebfm h\u1ebft b\u0103ng th\u00f4ng \u0111\u01b0\u1eddng truy\u1ec1n \u0111i ra b\u00ean ng\u00f2ai c\u1ee7a m\u1ea1ng n\u00e0y, v\u00ec th\u1ebf n\u00f3 g\u00e2y ra nh\u1eedng \u1ea3nh h\u01b0\u1edfng r\u1ea5t l\u1edbn \u0111\u1ebfn \u0111\u01b0\u1eddng truy\u1ec1n c\u0169ng nh\u01b0 t\u1ed1c \u0111\u1ed9 c\u1ee7a m\u1ea1ng, g\u00e2y n\u00ean nh\u1eefng kh\u00f3 kh\u0103n cho kh\u00e1ch h\u00e0ng khi truy c\u1eadp t\u1eeb b\u00ean ngo\u00e0i v\u00e0o m\u1ea1ng n\u00e0y.Nh\u1eefng \u0111i\u1ec1u ki\u1ec7n \u0111\u1ee7 \u0111\u1ec3 c\u00f3 nh\u1eefng cu\u1ed9c t\u1ea5n c\u00f4ng DoS C\u00f3 hi\u1ec7u qu\u1ea3:<br \/>\n\u0110\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c nh\u1eefng cu\u1ed9c t\u1ea5n c\u00f4ng DOS c\u00f3 hi\u1ec7u qu\u1ea3 th\u00f4ng th\u01b0\u1eddng m\u1ed9t Hacker ph\u1ea3i l\u1ef1a ch\u1ecdn cho m\u00ecnh nh\u1eefng \u0111\u01b0\u1eddng truy\u1ec1n c\u00f3 dung l\u01b0\u1ee3ng l\u1edbn c\u0169ng nh\u01b0 t\u1ed1c \u0111\u1ed9 m\u00e1y \u0111\u01b0\u1ee3c d\u00f9ng l\u00e0m c\u00f4ng c\u1ee5 t\u1ea5n c\u00f4ng. N\u1ebfu kh\u00f4ng h\u1ed9i t\u1ee5 \u0111\u01b0\u1ee3c nh\u1eefng \u0111i\u1ec1u ki\u1ec7n tr\u00ean th\u00ec cu\u1ed9c t\u1ea5n c\u00f4ng s\u1ebd kh\u00f4ng mang l\u1ea1i m\u1ea5y kh\u1ea3 quan.<\/p>\n<p>Nh\u01b0ng v\u1edbi nh\u1eefng ti\u1ec7n \u00edch nh\u01b0 Trinoo, TFN2K, Stacheldraht\u2026 ng\u01b0\u1eddi t\u1ea5n c\u00f4ng kh\u00f4ng ph\u1ea3i ch\u1ec9 d\u00f9ng 1 n\u01a1i \u0111\u1ec3 t\u1ea5n c\u00f4ng m\u00e0 s\u1eed d\u1ee5ng nhi\u1ec1u m\u1ea1ng l\u01b0\u1edbi kh\u00e1c nhau \u0111\u1ec3 th\u1ef1c hi\u1ec7n vi\u1ec7c t\u1ea5n c\u00f4ng \u0111\u1ed3ng l\u1ecdat. C\u00e1c m\u00e1y \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 t\u1ea5n c\u00f4ng th\u01b0\u1eddng l\u00e0 c\u00e1c m\u00e1y c\u00f3 k\u1ebft n\u1ed1i Internet b\u1ecb ng\u01b0\u1eddi t\u1ea5n c\u00f4ng x\u00e2m nh\u1eadp.<\/p>\n<p>Qua \u0111\u00f3 ch\u00fang t\u00f4i \u0111\u00e3 tham kh\u1ea3o v\u00e0 bi\u1ebft m\u1ed9t s\u1ed1 c\u00e1ch nh\u01b0ng h\u1ea7u h\u1ebft kh\u00f4ng ch\u1ed1ng \u0111\u01b0\u1ee3c m\u1ed9t c\u00e1ch tri\u1ec7t \u0111\u1ec3.<\/p>\n<p>Khi b\u1ea1n ph\u00e1t hi\u1ec7n m\u00e1y ch\u1ee7 m\u00ecnh b\u1ecb t\u1ea5n c\u00f4ng h\u00e3y nhanh ch\u00f3ng truy t\u00ecm \u0111\u1ecba ch\u1ec9 IP \u0111\u00f3 v\u00e0 c\u1ea5m kh\u00f4ng cho g\u1eedi d\u1eef li\u1ec7u \u0111\u1ebfn m\u00e1y ch\u1ee7.<\/p>\n<p>2. D\u00f9ng t\u00ednh n\u0103ng l\u1ecdc d\u1eef li\u1ec7u c\u1ee7a router\/firewall \u0111\u1ec3 lo\u1ea1i b\u1ecf c\u00e1c packet kh\u00f4ng mong mu\u1ed1n, gi\u1ea3m l\u01b0\u1ee3ng l\u01b0u th\u00f4ng tr\u00ean m\u1ea1ng v\u00e0 t\u1ea3i c\u1ee7a m\u00e1y ch\u1ee7.<\/p>\n<p>3. S\u1eed d\u1ee5ng c\u00e1c t\u00ednh n\u0103ng cho ph\u00e9p \u0111\u1eb7t rate limit tr\u00ean router\/firewall \u0111\u1ec3 h\u1ea1n ch\u1ebf s\u1ed1 l\u01b0\u1ee3ng packet v\u00e0o h\u1ec7 th\u1ed1ng.<\/p>\n<p>4. N\u1ebfu b\u1ecb t\u1ea5n c\u00f4ng do l\u1ed7i c\u1ee7a ph\u1ea7n m\u1ec1m hay thi\u1ebft b\u1ecb th\u00ec nhanh ch\u00f3ng c\u1eadp nh\u1eadt c\u00e1c b\u1ea3n s\u1eeda l\u1ed7i cho h\u1ec7 th\u1ed1ng \u0111\u00f3 ho\u1eb7c thay th\u1ebf.<\/p>\n<p>5. D\u00f9ng m\u1ed9t s\u1ed1 c\u01a1 ch\u1ebf, c\u00f4ng c\u1ee5, ph\u1ea7n m\u1ec1m \u0111\u1ec3 ch\u1ed1ng l\u1ea1i TCP SYN Flooding.<\/p>\n<p>6. T\u1eaft c\u00e1c d\u1ecbch v\u1ee5 kh\u00e1c n\u1ebfu c\u00f3 tr\u00ean m\u00e1y ch\u1ee7 \u0111\u1ec3 gi\u1ea3m t\u1ea3i v\u00e0 c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng t\u1ed1t h\u01a1n. N\u1ebfu \u0111\u01b0\u1ee3c c\u00f3 th\u1ec3 n\u00e2ng c\u1ea5p c\u00e1c thi\u1ebft b\u1ecb ph\u1ea7n c\u1ee9ng \u0111\u1ec3 n\u00e2ng cao kh\u1ea3 n\u0103ng \u0111\u00e1p \u1ee9ng c\u1ee7a h\u1ec7 th\u1ed1ng hay s\u1eed d\u1ee5ng th\u00eam c\u00e1c m\u00e1y ch\u1ee7 c\u00f9ng t\u00ednh n\u0103ng kh\u00e1c \u0111\u1ec3 ph\u00e2n chia t\u1ea3i.<\/p>\n<p>7. T\u1ea1m th\u1eddi chuy\u1ec3n m\u00e1y ch\u1ee7 sang m\u1ed9t \u0111\u1ecba ch\u1ec9 kh\u00e1c<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<h3><strong>2.Gi\u1edbi Thi\u1ec7u DDOS Secure :<\/strong><\/h3>\n<p><strong><u>A .T\u1ed5ng Quan v\u1ec1 DDOS secure :<\/u><\/strong><\/p>\n<p>&#8211; H\u1ec7 th\u1ed1ng ph\u00f2ng ch\u1ed1ng DDOS \u0111\u01b0\u1ee3c tri\u1ec3n khai \u1edf l\u1edbp trung gian, ngh\u0129a l\u00e0 h\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c \u0111\u1eb7t gi\u1eefa k\u1ebft n\u1ed1i internet v\u1edbi c\u00e1c m\u00e1y ch\u1ee7 b\u00ean trong. H\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb \u0111\u1eb7t tr\u01b0\u1edbc Firewall \u0111\u1ec3 c\u00f3 th\u1ec3 x\u1eed l\u00fd packets tr\u01b0\u1edbc, nh\u1ea7m gi\u1ea3m t\u1ea3i cho t\u01b0\u1eddng l\u1eeda v\u00e0 m\u00e1y ch\u1ee7 b\u00ean trong. M\u1ed9t s\u1ed1 t\u00ednh n\u0103ng c\u01a1 b\u1ea3n c\u1ee7a h\u1ec7 th\u1ed1ng nh\u01b0 sau:<\/p>\n<p>&#8211; Gi\u00e1m s\u00e1t to\u00e0n b\u1ed9 packets t\u1eeb ngo\u00e0i v\u00e0 b\u00ean trong h\u1ec7 th\u1ed1ng. Nh\u01b0 th\u1ebf, ch\u00fang ta c\u00f3 th\u1ec3 theo d\u00f5i \u0111\u01b0\u1ee3c b\u0103ng th\u00f4ng In-Out c\u1ee7a to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng, chi ti\u1ebft \u0111\u1ebfn t\u1eebng IP b\u00ean trong.<\/p>\n<p>&#8211; Gi\u00e1m s\u00e1t to\u00e0n b\u1ed9 traffics t\u1eebng source port hay destination port.<\/p>\n<p>&#8211; Cung c\u1ea5p th\u00f4ng tin gi\u00e1m s\u00e1t TCP, UDP, URL, DNS, SIP \u2026<\/p>\n<p>&#8211; C\u00f3 th\u1ec3 ng\u0103n ch\u1eb7n t\u1ea5n c\u00f4ng t\u1eeb t\u1eebng IP, \u0111\u1ebfn range IP, AS Number hay c\u1ea3 Country<\/p>\n<p>&#8211; C\u00f3 th\u1ec3 c\u1ea5u h\u00ecnh b\u1ea3o v\u1ec7 to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng hay chi ti\u1ebft v\u1edbi t\u1eebng IP.<\/p>\n<p>&#8211; B\u00e1o c\u00e1o t\u1ea5n c\u00f4ng trong m\u1ed7i 5p<\/p>\n<p>&#8211; B\u00e1o c\u00e1o t\u1ed5ng quan traffics m\u1ed7i ng\u00e0y<\/p>\n<p>&nbsp;<\/p>\n<p><strong><u>B.Y\u00eau C\u1ea7u v\u1ec1 Ph\u1ea7n C\u1ee9ng <\/u><\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>CPU : 8core<\/p>\n<p>RAM : 16G<\/p>\n<p>HDD : 100G<\/p>\n<p>Network Card : 2<\/p>\n<p>&nbsp;<\/p>\n<p><strong><u>C.M\u00f4 H\u00ecnh :<\/u><\/strong><\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter wp-image-3548 size-full\" src=\"http:\/\/demo.vnso.vn\/wp-content\/uploads\/2016\/07\/he-thong-chong-ddos.jpg\" alt=\"Gi\u1edbi thi\u1ec7u v\u1ec1 h\u1ec7 th\u1ed1ng ch\u1ed1ng DDOS\" width=\"648\" height=\"590\" \/><\/p>\n<p><strong><u>D.\u01afu \u0110i\u1ec3m :<\/u><\/strong><\/p>\n<p>&nbsp;<\/p>\n<p>\u0110i\u1ec1u hay nh\u1ea5t c\u1ee7a h\u1ec7 th\u1ed1ng ph\u00f2ng ch\u1ed1ng DDOS n\u00e0y, \u0111\u00f3 ch\u00ednh l\u00e0 Automation. Sau khi \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh, h\u1ec7 th\u1ed1ng s\u1ebd t\u1ef1 h\u1ecdc c\u00e1c traffics \u0111\u1ebfn t\u1eebng m\u00e1y ch\u1ee7, t\u1eeb \u0111\u00f3 c\u00f3 th\u1ec3 t\u1ef1 \u0111\u1ed9ng c\u1ea3nh b\u00e1o v\u00e0 ng\u0103n ch\u1eb7n, gi\u00fap qu\u1ea3n tr\u1ecb k\u1ecbp th\u1eddi n\u1eafm b\u1eaft t\u00ecnh h\u00ecnh v\u00e0 ch\u1ee7 \u0111\u1ed9ng can thi\u1ec7p khi c\u1ea7n.<\/p>\n<p>Th\u1eddi gian \u0111\u1ec3 t\u1ef1 h\u1ecdc traffics t\u1eeb 1 \u2013 2 tu\u1ea7n.<\/p>\n<p>&nbsp;<\/p>\n<p><strong><u>E . H\u1ea1n ch\u1ebf<\/u><\/strong><\/p>\n<p>Limited Session : 385k<\/p>\n<p>Litmited Connection : 128k<\/p>","protected":false},"excerpt":{"rendered":"<p>1.Gi\u1edbi Thi\u1ec7u DDOS : A.DDOS l\u00e0 g\u00ec? : DDoS l\u00e0\u00a0ki\u1ec3u t\u1ea5n c\u00f4ng l\u00e0m cho m\u1ee5c ti\u00eau,\u00a0l\u00e0 c\u00e1c trang web, d\u1ecbch v\u1ee5 tr\u1ef1c tuy\u1ebfn, tr\u1edf n\u00ean qu\u00e1 t\u1ea3i. Ng\u01b0\u1eddi d\u00f9ng g\u1eb7p kh\u00f3 kh\u0103n, hay th\u1eadm ch\u00ed kh\u00f4ng th\u1ec3 truy c\u1eadp v\u00e0o c\u00e1c trang web, d\u1ecbch v\u1ee5 n\u00e0y<\/p>","protected":false},"author":1,"featured_media":10697,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[52,17],"tags":[73],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.3 (Yoast SEO v22.8) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Gi\u1edbi thi\u1ec7u v\u1ec1 h\u1ec7 th\u1ed1ng ch\u1ed1ng DDOS | C\u00d4NG NGH\u1ec6 VNSO\u2122<\/title>\n<meta name=\"description\" content=\"Gi\u1edbi thi\u1ec7u v\u1ec1 h\u1ec7 th\u1ed1ng ch\u1ed1ng DDOS,DDoS l\u00e0 ki\u1ec3u t\u1ea5n c\u00f4ng l\u00e0m cho m\u1ee5c ti\u00eau, l\u00e0 c\u00e1c trang web, d\u1ecbch v\u1ee5 tr\u1ef1c tuy\u1ebfn, tr\u1edf n\u00ean qu\u00e1 t\u1ea3i.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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