{"id":10157,"date":"2023-04-07T18:51:19","date_gmt":"2023-04-07T11:51:19","guid":{"rendered":""},"modified":"2024-06-27T11:01:09","modified_gmt":"2024-06-27T04:01:09","slug":"tan-cong-ddos-la-gi-ban-co-the-bao-ve-trang-web-cua-minh-nhu-the-nao","status":"publish","type":"post","link":"https:\/\/vnso.vn\/en\/tan-cong-ddos-la-gi-ban-co-the-bao-ve-trang-web-cua-minh-nhu-the-nao\/","title":{"rendered":"T\u1ea5n C\u00f4ng DDoS L\u00e0 G\u00ec & B\u1ea1n C\u00f3 Th\u1ec3 B\u1ea3o V\u1ec7 Trang Web C\u1ee7a M\u00ecnh Nh\u01b0 Th\u1ebf N\u00e0o?"},"content":{"rendered":"

B\u1ea1n \u0111\u00e3 bao gi\u1edd lo l\u1eafng v\u1ec1 vi\u1ec7c trang web c\u1ee7a m\u00ecnh b\u1ecb s\u1eadp ch\u01b0a? Cho d\u00f9 b\u1ea1n \u0111i\u1ec1u h\u00e0nh m\u1ed9t c\u1eeda h\u00e0ng tr\u1ef1c tuy\u1ebfn hay qu\u1ea3n l\u00fd m\u1ed9t blog, m\u1ed9t trang web b\u1ecb s\u1eadp c\u00f3 th\u1ec3 \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c m\u1ea5t l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp v\u00e0 ho\u1ea1t \u0111\u1ed9ng kinh doanh. M\u1eb7c d\u00f9 vi\u1ec7c trang web ng\u1eebng ho\u1ea1t \u0111\u1ed9ng trong th\u1eddi gian ng\u1eafn v\u00e0 kh\u00f4ng th\u01b0\u1eddng xuy\u00ean l\u00e0 \u0111i\u1ec1u b\u00ecnh th\u01b0\u1eddng. Tuy nhi\u00ean, m\u1ed9t s\u1ed1 trang web c\u00f3 th\u1ec3 ng\u1eebng ho\u1ea1t \u0111\u1ed9ng v\u00ec l\u00fd do \u0111\u1ed9c h\u1ea1i h\u01a1n nhi\u1ec1u – m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS.<\/p>\n

N\u1ebfu b\u1ea1n \u0111\u00e3 t\u1eebng l\u00e0 m\u1ee5c ti\u00eau c\u1ee7a m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS ho\u1eb7c t\u1ef1 m\u00ecnh ch\u1ee9ng ki\u1ebfn \u200b\u200bm\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng b\u1ea1n s\u1ebd bi\u1ebft ch\u00ednh x\u00e1c n\u00f3 c\u00f3 th\u1ec3 g\u00e2y suy nh\u01b0\u1ee3c nh\u01b0 th\u1ebf n\u00e0o. Tuy nhi\u00ean, ch\u00ednh x\u00e1c th\u00ec cu\u1ed9c t\u1ea5n c\u00f4ng DDoS l\u00e0 g\u00ec v\u00e0 l\u00e0m th\u1ebf n\u00e0o b\u1ea1n c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 trang web c\u1ee7a m\u00ecnh kh\u1ecfi n\u00f3?<\/p>\n

H\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS nh\u1eb1m \u0111\u00e1nh s\u1eadp c\u00e1c trang web v\u00e0 c\u00e1c b\u01b0\u1edbc b\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n \u0111\u1ec3 gi\u1ea3m thi\u1ec3u thi\u1ec7t h\u1ea1i.<\/p>\n

1. T\u1ea5n c\u00f4ng DDoS l\u00e0 g\u00ec?<\/h2>\n

M\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS, vi\u1ebft t\u1eaft c\u1ee7a Distributed Denial of Service. \u0110\u00e2y l\u00e0 m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng \u00e1p \u0111\u1ea3o m\u00e1y ch\u1ee7, m\u1ea1ng ho\u1eb7c d\u1ecbch v\u1ee5 b\u1eb1ng c\u00e1ch \u00e1p \u0111\u1ea3o n\u00f3 b\u1eb1ng l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp \u0111\u1ed9c h\u1ea1i. M\u1ed9t ki\u1ec3u t\u1ea5n c\u00f4ng DoS (t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5), n\u00f3 l\u00e0m ng\u1eadp d\u1ecbch v\u1ee5 khi\u1ebfn d\u1ecbch v\u1ee5 kh\u00f4ng kh\u1ea3 d\u1ee5ng v\u1edbi l\u01b0u l\u01b0\u1ee3ng ng\u01b0\u1eddi d\u00f9ng h\u1ee3p ph\u00e1p. Nhi\u1ec1u cu\u1ed9c t\u1ea5n c\u00f4ng DDoS s\u1eed d\u1ee5ng nhi\u1ec1u thi\u1ebft b\u1ecb, bao g\u1ed3m c\u1ea3 m\u00e1y t\u00ednh v\u00e0 thi\u1ebft b\u1ecb IoT (Internet of Things), l\u00e0m ngu\u1ed3n l\u01b0u l\u01b0\u1ee3ng t\u1ea5n c\u00f4ng.<\/p>\n

L\u00e0m c\u00e1ch n\u00e0o \u0111\u1ec3 k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 \u0111\u01b0\u1ee3c quy\u1ec1n truy c\u1eadp v\u00e0o nhi\u1ec1u thi\u1ebft b\u1ecb \u0111\u00f3?.\u00a0Th\u00f4ng th\u01b0\u1eddng, c\u00e1c m\u00e1y t\u00ednh v\u00e0 thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS b\u1ecb nhi\u1ec5m ph\u1ea7n m\u1ec1m \u0111\u1ed9c h\u1ea1i v\u00e0 b\u1ecb khai th\u00e1c. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 di\u1ec5n ra \u00e2m th\u1ea7m trong n\u1ec1n c\u1ee7a thi\u1ebft b\u1ecb ho\u1eb7c ph\u1ea7n m\u1ec1m \u0111\u1ed9c h\u1ea1i c\u00f3 th\u1ec3 chi\u1ebfm to\u00e0n quy\u1ec1n ki\u1ec3m so\u00e1t.\u00a0Nh\u00f3m thi\u1ebft b\u1ecb n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0\u00a0botnet<\/strong>. M\u1ea1ng n\u00e0y c\u0169ng ch\u1ecbu tr\u00e1ch nhi\u1ec7m v\u1ec1 ph\u1ea7n m\u1ec1m t\u1ed1ng ti\u1ec1n, th\u01b0 r\u00e1c v\u00e0 gian l\u1eadn nh\u1ea5p chu\u1ed9t.<\/p>\n

M\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS<\/a> t\u01b0\u01a1ng t\u1ef1 nh\u01b0 vi\u1ec7c \u0111\u01b0\u1eddng cao t\u1ed1c b\u1ecb k\u1eb9t xe, c\u1ea3n tr\u1edf b\u1ea1n ho\u1eb7c b\u1ea5t k\u1ef3 ai kh\u00e1c \u0111i v\u00e0o \u0111\u01b0\u1eddng cao t\u1ed1c v\u00e0 \u0111\u1ebfn n\u01a1i b\u1ea1n \u0111ang c\u1ed1 g\u1eafng \u0111\u1ebfn.\u00a0Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, \u0111\u00edch \u0111\u1ebfn l\u00e0 trang web c\u1ee7a b\u1ea1n v\u00e0 l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp ch\u1eb7n m\u1ecdi ng\u01b0\u1eddi di chuy\u1ec3n l\u00e0 cu\u1ed9c t\u1ea5n c\u00f4ng DDoS.<\/p>\n

V\u00ec v\u1eady, r\u00f5 r\u00e0ng m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS c\u00f3 th\u1ec3 l\u00e0m suy y\u1ebfu doanh nghi\u1ec7p. Vi\u1ec7c ng\u0103n ch\u1eb7n kh\u00e1ch h\u00e0ng h\u1ee3p ph\u00e1p truy c\u1eadp trang web c\u00f3 th\u1ec3 g\u00e2y ra t\u1ed5n th\u1ea5t l\u1edbn. H\u00e3y t\u00ecm hi\u1ec3u s\u00e2u h\u01a1n v\u1ec1 c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS v\u00e0 c\u00e1c lo\u1ea1i kh\u00e1c nhau m\u00e0 b\u1ea1n n\u00ean bi\u1ebft.<\/p>\n

>>> Xem th\u00eam: Ch\u1ed1ng ddos vps, h\u01b0\u1edbng d\u1eabn c\u00e1ch ch\u1ed1ng ddos cho vps<\/a><\/strong><\/p>\n

2. C\u00e1c lo\u1ea1i t\u1ea5n c\u00f4ng DDoS ph\u1ed5 bi\u1ebfn<\/h2>\n

Tr\u01b0\u1edbc khi t\u00ecm hi\u1ec3u v\u1ec1 c\u00e1c ki\u1ec3u t\u1ea5n c\u00f4ng DDoS ph\u1ed5 bi\u1ebfn nh\u1ea5t, tr\u01b0\u1edbc ti\u00ean ch\u00fang ta c\u1ea7n hi\u1ec3u c\u01a1 b\u1ea3n v\u1ec1 nh\u1eefng g\u00ec ch\u00fang \u0111ang t\u1ea5n c\u00f4ng \u2013 m\u1ea1ng.\u00a0Do k\u1ebft n\u1ed1i m\u1ea1ng l\u00e0 m\u1ed9t kh\u00e1i ni\u1ec7m kh\u00f4ng h\u1eefu h\u00ecnh n\u00ean n\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 b\u1eb1ng\u00a0m\u00f4 h\u00ecnh K\u1ebft n\u1ed1i h\u1ec7 th\u1ed1ng m\u1edf (OSI).<\/em> M\u00f4 h\u00ecnh n\u00e0y kh\u00e1i ni\u1ec7m h\u00f3a k\u1ebft n\u1ed1i m\u1ea1ng b\u1eb1ng c\u00e1ch chia n\u00f3 th\u00e0nh 7 l\u1edbp.<\/p>\n

C\u00e1c l\u1edbp \u0111\u01b0\u1ee3c nh\u1eafm m\u1ee5c ti\u00eau ph\u1ed5 bi\u1ebfn nh\u1ea5t b\u1edfi c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS l\u00e0 c\u00e1c l\u1edbp M\u1ea1ng, V\u1eadn chuy\u1ec3n, Tr\u00ecnh b\u00e0y v\u00e0 \u1ee8ng d\u1ee5ng. M\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS nh\u1eafm v\u00e0o c\u00e1c l\u1edbp c\u1ee5 th\u1ec3 \u0111\u1ec3 l\u00e0m t\u00ea li\u1ec7t k\u1ebft n\u1ed1i t\u1ea1i c\u00e1c \u0111i\u1ec3m kh\u00e1c nhau. Ng\u0103n ng\u01b0\u1eddi d\u00f9ng h\u1ee3p ph\u00e1p truy c\u1eadp trang web c\u1ee7a b\u1ea1n.<\/p>\n

2.1. T\u1ea5n c\u00f4ng l\u1edbp \u1ee9ng d\u1ee5ng<\/h3>\n

Khi t\u1ea5n c\u00f4ng DDoS l\u1edbp 7, c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng l\u1edbp \u1ee9ng d\u1ee5ng nh\u1eafm v\u00e0o giao ti\u1ebfp gi\u1eefa ng\u01b0\u1eddi d\u00f9ng v\u00e0 ch\u01b0\u01a1ng tr\u00ecnh ho\u1eb7c d\u1ecbch v\u1ee5.\u00a0M\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS l\u1edbp \u1ee9ng d\u1ee5ng s\u1ebd t\u1eadp trung v\u00e0o ph\u1ea7n k\u1ebft n\u1ed1i m\u1ea1ng n\u01a1i m\u00e1y ch\u1ee7 t\u1ea1o c\u00e1c trang web v\u00e0 ph\u00e2n ph\u1ed1i ch\u00fang theo y\u00eau c\u1ea7u HTTP.\u00a0C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng l\u1edbp \u1ee9ng d\u1ee5ng \u00e1p \u0111\u1ea3o m\u00e1y ch\u1ee7 b\u1eb1ng c\u00e1ch g\u1eedi m\u1ed9t l\u01b0\u1ee3ng l\u1edbn y\u00eau c\u1ea7u HTTP \u0111\u1ed9c h\u1ea1i, tr\u00f4ng c\u00f3 v\u1ebb h\u1ee3p ph\u00e1p v\u00e0 kh\u00f3 ph\u00e2n bi\u1ec7t v\u1edbi l\u01b0u l\u01b0\u1ee3ng ng\u01b0\u1eddi d\u00f9ng th\u1ef1c.<\/p>\n

Hai lo\u1ea1i ch\u00ednh c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS l\u1edbp \u1ee9ng d\u1ee5ng l\u00e0 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng tr\u00e0n ng\u1eadp HTTP.\u00a0C\u1ea3 hai cu\u1ed9c t\u1ea5n c\u00f4ng \u0111\u1ec1u \u00e1p \u0111\u1ea3o m\u1ee5c ti\u00eau b\u1eb1ng c\u00e1c y\u00eau c\u1ea7u HTTP, nh\u01b0ng ch\u00fang th\u1ef1c hi\u1ec7n \u0111i\u1ec1u \u0111\u00f3 theo nh\u1eefng c\u00e1ch kh\u00e1c nhau.<\/p>\n

\"\"<\/p>\n

Flood <\/strong>HTTP<\/strong>\u00a0li\u00ean quan \u0111\u1ebfn vi\u1ec7c nhi\u1ec1u thi\u1ebft b\u1ecb g\u1eedi y\u00eau c\u1ea7u \u0111\u1ebfn m\u1ed9t m\u00e1y ch\u1ee7 \u0111\u1ec3 l\u1ea5y t\u1ec7p, h\u00ecnh \u1ea3nh, v.v., l\u00e0m qu\u00e1 t\u1ea3i m\u00e1y ch\u1ee7 \u0111\u00edch v\u00e0 d\u1eabn \u0111\u1ebfn t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5.<\/p>\n

Flood <\/strong>HTTP POST<\/strong> thay v\u00ec g\u1eedi y\u00eau c\u1ea7u cho n\u1ed9i dung t\u0129nh, h\u00e3y g\u1eedi y\u00eau c\u1ea7u cho c\u00e1c t\u00e0i nguy\u00ean \u0111\u01b0\u1ee3c t\u1ea1o \u0111\u1ed9ng nh\u01b0 g\u1eedi bi\u1ec3u m\u1eabu.<\/p>\n

M\u1eb7c d\u00f9 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c coi l\u00e0 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng d\u1ef1a tr\u00ean kh\u1ed1i l\u01b0\u1ee3ng m\u00e0 ch\u00fang ta s\u1ebd \u0111\u1ec1 c\u1eadp sau, nh\u01b0ng c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng l\u1edbp \u1ee9ng d\u1ee5ng th\u01b0\u1eddng tu\u00e2n theo ph\u01b0\u01a1ng ph\u00e1p \u201cth\u1ea5p v\u00e0 ch\u1eadm\u201d. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 ch\u00fang nh\u1ecf h\u01a1n, d\u1ec5 d\u00e0ng l\u1ecdt v\u00e0o t\u1ea7m ng\u1eafm cho \u0111\u1ebfn khi ch\u00fang khu\u1ebfch \u0111\u1ea1i v\u00e0 g\u00e2y gi\u00e1n \u0111o\u1ea1n d\u1ecbch v\u1ee5.<\/p>\n

2.2. T\u1ea5n c\u00f4ng giao th\u1ee9c<\/h3>\n

M\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng giao th\u1ee9c l\u1ee3i d\u1ee5ng c\u00e1c \u0111i\u1ec3m y\u1ebfu tr\u00ean l\u1edbp 3 v\u00e0 4 c\u1ee7a m\u00f4 h\u00ecnh OSI.\u00a0Ki\u1ec3u t\u1ea5n c\u00f4ng DDoS n\u00e0y s\u1ebd g\u1eedi nhi\u1ec1u \u201cg\u00f3i\u201d ho\u1eb7c m\u1ea9u d\u1eef li\u1ec7u h\u01a1n m\u1ee9c m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 x\u1eed l\u00fd.\u00a0Ngo\u00e0i ra, m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng giao th\u1ee9c c\u00f3 th\u1ec3 g\u1eedi m\u1ed9t l\u01b0\u1ee3ng b\u0103ng th\u00f4ng qu\u00e1 l\u1edbn \u0111\u1ebfn m\u1ea1ng c\u1ee7a b\u1ea1n.\u00a0D\u00f9 b\u1eb1ng c\u00e1ch n\u00e0o, cu\u1ed9c t\u1ea5n c\u00f4ng n\u00e0y s\u1ebd ti\u00eau t\u1ed1n t\u00e0i nguy\u00ean m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n v\u00e0 d\u1eabn \u0111\u1ebfn t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5.<\/p>\n

C\u00f3 hai lo\u1ea1i t\u1ea5n c\u00f4ng giao th\u1ee9c ch\u00ednh: T\u1ea5n c\u00f4ng SYN l\u0169 l\u1ee5t v\u00e0 t\u1ea5n c\u00f4ng Ping of Death (POD).<\/p>\n

Flood <\/strong>SYN<\/strong>\u00a0t\u1eadn d\u1ee5ng l\u1ee3i th\u1ebf c\u1ee7a TCP, cho ph\u00e9p c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh v\u00e0 thi\u1ebft b\u1ecb g\u1eedi tin nh\u1eafn cho nhau.\u00a0SYN l\u00e0 m\u1ed9t lo\u1ea1i g\u00f3i TCP, \u0111\u01b0\u1ee3c g\u1eedi \u0111\u1ebfn thi\u1ebft b\u1ecb \u0111\u1ec3 y\u00eau c\u1ea7u k\u1ebft n\u1ed1i.\u00a0Thi\u1ebft b\u1ecb nh\u1eadn \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u \u0111\u00f3 s\u1ebd c\u1ed1 g\u1eafng g\u1eedi l\u1ea1i ph\u1ea3n h\u1ed3i SYN-ACK.\u00a0Cu\u1ed9c t\u1ea5n c\u00f4ng n\u00e0y khai th\u00e1c m\u1ed9t \u0111i\u1ec3m y\u1ebfu trong qu\u00e1 tr\u00ecnh n\u00e0y, g\u1eedi nhi\u1ec1u y\u00eau c\u1ea7u SYN m\u00e0 kh\u00f4ng ph\u1ea3n h\u1ed3i l\u1ea1i ph\u1ea3n h\u1ed3i SYN-ACK.\u00a0Khi thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c nh\u1eafm m\u1ee5c ti\u00eau ch\u1edd x\u00e1c nh\u1eadn ph\u1ea3n h\u1ed3i \u0111\u00f3, c\u00e1c k\u1ebft n\u1ed1i m\u1edbi kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n v\u00e0 c\u00e1c y\u00eau c\u1ea7u g\u1eedi \u0111\u1ebfn s\u1ebd b\u1ecb t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5.<\/p>\n

Ping of Death<\/strong>, ho\u1eb7c POD, c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng c\u00f3 m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn kh\u00e1c.\u00a0S\u1eed d\u1ee5ng l\u1ec7nh ping, cu\u1ed9c t\u1ea5n c\u00f4ng DDoS n\u00e0y s\u1ebd g\u1eedi nhi\u1ec1u g\u00f3i qu\u00e1 kh\u1ed5 \u0111\u1ebfn m\u1ee5c ti\u00eau.\u00a0M\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng Ping of Death c\u00f3 th\u1ec3 g\u1eedi c\u00e1c g\u00f3i l\u1edbn h\u01a1n\u00a0k\u00edch th\u01b0\u1edbc g\u00f3i t\u1ed1i \u0111a\u00a0v\u00ec n\u00f3 g\u1eedi ch\u00fang d\u01b0\u1edbi d\u1ea1ng c\u00e1c \u0111o\u1ea1n.\u00a0Khi m\u00e1y ch\u1ee7 nh\u1eadn t\u1eadp h\u1ee3p t\u1ea5t c\u1ea3 c\u00e1c m\u1ea3nh, d\u1eef li\u1ec7u s\u1ebd tr\u00e0n v\u00e0 g\u00e2y ra s\u1ef1 t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5.<\/p>\n

2.3. T\u1ea5n c\u00f4ng d\u1ef1a tr\u00ean kh\u1ed1i l\u01b0\u1ee3ng<\/h3>\n

M\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS d\u1ef1a tr\u00ean kh\u1ed1i l\u01b0\u1ee3ng ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch chi\u1ebfm t\u1ea5t c\u1ea3 b\u0103ng th\u00f4ng c\u00f3 s\u1eb5n gi\u1eefa m\u1ee5c ti\u00eau v\u00e0 t\u1ea5t c\u1ea3 l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp Internet.\u00a0N\u00f3 c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n \u0111i\u1ec1u n\u00e0y b\u1eb1ng c\u00e1ch g\u1eedi m\u1ed9t l\u01b0\u1ee3ng l\u1edbn d\u1eef li\u1ec7u \u0111\u1ebfn thi\u1ebft b\u1ecb m\u1ee5c ti\u00eau th\u00f4ng qua khu\u1ebfch \u0111\u1ea1i.\u00a0C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng d\u1ef1a tr\u00ean s\u1ed1 l\u01b0\u1ee3ng l\u1edbn c\u0169ng th\u01b0\u1eddng s\u1eed d\u1ee5ng botnet \u0111\u1ec3 chi\u1ebfm b\u0103ng th\u00f4ng v\u00e0 t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5 t\u1edbi m\u1ee5c ti\u00eau.<\/p>\n

Ngo\u00e0i l\u0169 l\u1ee5t HTTP, c\u00f2n c\u00f3 m\u1ed9t s\u1ed1 cu\u1ed9c t\u1ea5n c\u00f4ng l\u0169 l\u1ee5t d\u1ef1a tr\u00ean kh\u1ed1i l\u01b0\u1ee3ng kh\u00e1c m\u00e0 c\u00e1c trang web c\u00f3 th\u1ec3 tr\u1edf th\u00e0nh n\u1ea1n nh\u00e2n.<\/p>\n

Flood UDP<\/strong> g\u1eedi m\u1ed9t l\u01b0\u1ee3ng l\u1edbn g\u00f3i d\u1eef li\u1ec7u Giao th\u1ee9c g\u00f3i d\u1eef li\u1ec7u ng\u01b0\u1eddi d\u00f9ng (UDP). L\u1ee3i d\u1ee5ng \u0111i\u1ec3m y\u1ebfu c\u1ed1 h\u1eefu c\u1ee7a UDP \u2013 n\u00f3 y\u00eau c\u1ea7u ki\u1ec3m tra \u00edt h\u01a1n TCP, cho ph\u00e9p l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp d\u1ec5 d\u00e0ng h\u01a1n. Flood <\/strong>UDP chi\u1ebfm t\u00e0i nguy\u00ean c\u1ee7a m\u00e1y ch\u1ee7 b\u1eb1ng c\u00e1ch g\u1eedi c\u00e1c g\u00f3i n\u00e0y \u0111\u1ebfn c\u00e1c c\u1ed5ng ng\u1eabu nhi\u00ean. \u0110i\u1ec1u n\u00e0y khi\u1ebfn m\u00e1y ch\u1ee7 ph\u1ea3i li\u00ean t\u1ee5c ki\u1ec3m tra v\u00e0 tr\u1ea3 l\u1eddi b\u1eb1ng g\u00f3i ICMP \u201cKh\u00f4ng th\u1ec3 truy c\u1eadp \u0111\u00edch\u201d. Do s\u1ed1 l\u01b0\u1ee3ng t\u00e0i nguy\u00ean b\u1ecb gi\u1eef l\u00e0m con tin b\u1edfi cu\u1ed9c t\u1ea5n c\u00f4ng n\u00e0y, d\u1ecbch v\u1ee5 c\u00f3 th\u1ec3 b\u1ecb t\u1eeb ch\u1ed1i \u0111\u1ed1i v\u1edbi l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp h\u1ee3p ph\u00e1p.<\/p>\n

Flood ICMP<\/strong>\u00a0ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng t\u1ef1, g\u1eedi c\u00e1c g\u00f3i y\u00eau c\u1ea7u Giao th\u1ee9c th\u00f4ng b\u00e1o ki\u1ec3m so\u00e1t n\u1ed9i b\u1ed9 (ICMP) c\u00e0ng nhanh c\u00e0ng t\u1ed1t t\u1edbi m\u1ee5c ti\u00eau m\u00e0 kh\u00f4ng cho m\u1ee5c ti\u00eau c\u01a1 h\u1ed9i g\u1eedi tr\u1ea3 l\u1eddi l\u1ea1i.\u00a0B\u1edfi v\u00ec m\u00e1y ch\u1ee7 c\u1ed1 g\u1eafng \u0111\u00e1p \u1ee9ng t\u1ea5t c\u1ea3 c\u00e1c g\u00f3i \u0111\u1ebfn, c\u1ea3 b\u0103ng th\u00f4ng \u0111i v\u00e0 \u0111\u1ebfn \u0111\u1ec1u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.\u00a0\u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5 \u0111\u1ed1i v\u1edbi l\u01b0u l\u01b0\u1ee3ng ng\u01b0\u1eddi d\u00f9ng.<\/p>\n

3. T\u1ea1i sao c\u00e1c trang web b\u1ecb t\u1ea5n c\u00f4ng DDoS?<\/h2>\n

M\u1ee5c ti\u00eau ch\u00ednh c\u1ee7a m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS l\u00e0 ng\u0103n ch\u1eb7n l\u01b0u l\u01b0\u1ee3ng ng\u01b0\u1eddi d\u00f9ng h\u1ee3p ph\u00e1p truy c\u1eadp trang web c\u1ee7a b\u1ea1n, cho d\u00f9 \u0111\u00f3 l\u00e0 l\u00e0m cho trang web ch\u1eadm ho\u1eb7c ho\u00e0n to\u00e0n kh\u00f4ng th\u1ec3 truy c\u1eadp \u0111\u01b0\u1ee3c.\u00a0Tuy nhi\u00ean, l\u00fd do \u0111\u1ec3 ai \u0111\u00f3 mu\u1ed1n t\u1eeb ch\u1ed1i truy c\u1eadp v\u00e0o trang web c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 kh\u00e1c nhau.\u00a0\u0110\u00e2y ch\u1ec9 l\u00e0 m\u1ed9t v\u00e0i l\u00fd do t\u1ea1i sao m\u1ed9t trang web c\u00f3 th\u1ec3 b\u1ecb t\u1ea5n c\u00f4ng DDoS:<\/p>\n

3.1. C\u1ea1nh tranh<\/strong><\/h3>\n

M\u1ed9t doanh nghi\u1ec7p c\u1ea1nh tranh c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS \u0111\u1ec3 th\u1eed h\u1ea1 g\u1ee5c doanh nghi\u1ec7p m\u00e0 h\u1ecd \u0111ang c\u1ea1nh tranh. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 tr\u00f9ng h\u1ee3p m\u1ed9t c\u00e1ch chi\u1ebfn l\u01b0\u1ee3c v\u1edbi c\u00e1c s\u1ef1 ki\u1ec7n l\u1edbn, ch\u1eb3ng h\u1ea1n nh\u01b0 ra m\u1eaft s\u1ea3n ph\u1ea9m m\u1edbi ho\u1eb7c k\u1ef3 ngh\u1ec9 gi\u1ea3m gi\u00e1 nh\u01b0 Th\u1ee9 Hai \u0110i\u1ec7n T\u1eed.<\/p>\n

3.2. Hacktivism<\/strong><\/h3>\n

C\u00e1c nh\u00f3m \u201chacktivists\u201d, l\u00e0 nh\u1eefng nh\u00e0 ho\u1ea1t \u0111\u1ed9ng ch\u00ednh tr\u1ecb s\u1eed d\u1ee5ng hack nh\u01b0 m\u1ed9t c\u00f4ng c\u1ee5, c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS \u0111\u1ec3 nh\u1eafm m\u1ee5c ti\u00eau v\u00e0o c\u00e1c trang web m\u00e0 h\u1ecd ph\u1ea3n \u0111\u1ed1i v\u1ec1 m\u1eb7t t\u01b0 t\u01b0\u1edfng.<\/p>\n

3.3. T\u1ed1ng ti\u1ec1n<\/strong><\/h3>\n

T\u1ed9i ph\u1ea1m tr\u1ef1c tuy\u1ebfn c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS (ho\u1eb7c th\u1eadm ch\u00ed ch\u1ec9 \u0111\u01a1n gi\u1ea3n l\u00e0 \u0111e d\u1ecda t\u1ea5n c\u00f4ng) \u0111\u1ec3 t\u1ed1ng ti\u1ec1n t\u1eeb trang web m\u1ee5c ti\u00eau th\u00f4ng qua ti\u1ec1n chu\u1ed9c ho\u1eb7c t\u1ed1ng ti\u1ec1n.<\/p>\n

3.4. Ph\u00e1 ho\u1ea1i<\/strong><\/h3>\n

M\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS \u0111\u00f4i khi c\u00f3 th\u1ec3 x\u1ea3y ra m\u00e0 kh\u00f4ng c\u00f3 l\u00fd do th\u1ef1c s\u1ef1. N\u00f3 c\u00f3 th\u1ec3 \u0111\u01a1n gi\u1ea3n l\u00e0 do m\u1ed9t k\u1ebb ph\u00e1 ho\u1ea1i m\u1ea1ng quy\u1ebft \u0111\u1ecbnh t\u1ea5n c\u00f4ng m\u1ed9t trang web cho vui.<\/p>\n

D\u00f9 l\u00fd do t\u1ea5n c\u00f4ng l\u00e0 g\u00ec th\u00ec c\u00f3 m\u1ed9t \u0111i\u1ec1u ch\u1eafc ch\u1eafn r\u1eb1ng m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS kh\u00f4ng th\u1ec3 \u0111\u00e1nh c\u1eafp th\u00f4ng tin nh\u1ea1y c\u1ea3m t\u1eeb trang web c\u1ee7a b\u1ea1n. Th\u1eadm ch\u00ed, vi\u1ec7c tr\u1edf th\u00e0nh n\u1ea1n nh\u00e2n c\u1ee7a m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS c\u00f3 th\u1ec3 t\u00e0n ph\u00e1 doanh nghi\u1ec7p c\u1ee7a b\u1ea1n.<\/p>\n

4. Ph\u1ea3i l\u00e0m g\u00ec n\u1ebfu trang web c\u1ee7a b\u1ea1n b\u1ecb t\u1ea5n c\u00f4ng<\/h2>\n

\"\"<\/p>\n

N\u1ebfu kh\u00f4ng c\u00f3 s\u1ef1 chu\u1ea9n b\u1ecb v\u00e0 b\u1ea3o v\u1ec7 tr\u01b0\u1edbc, c\u00f3 th\u1ec3 kh\u00f3 (v\u00e0 \u0111\u00f4i khi kh\u00f4ng th\u1ec3) ng\u0103n ch\u1eb7n ho\u00e0n to\u00e0n m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS khi n\u00f3 b\u1eaft \u0111\u1ea7u. Tuy nhi\u00ean, n\u1ebfu trang web c\u1ee7a b\u1ea1n hi\u1ec7n \u0111ang b\u1ecb t\u1ea5n c\u00f4ng c\u00f3 m\u1ed9t v\u00e0i \u0111i\u1ec1u b\u1ea1n c\u00f3 th\u1ec3 l\u00e0m \u0111\u1ec3 th\u1eed v\u00e0 gi\u1ea3m thi\u1ec3u n\u00f3.<\/p>\n

4.1. Giao ti\u1ebfp v\u1edbi \u0111\u00fang ng\u01b0\u1eddi trong t\u1ed5 ch\u1ee9c c\u1ee7a b\u1ea1n.<\/h3>\n

B\u01b0\u1edbc \u0111\u1ea7u ti\u00ean b\u1ea1n c\u1ea7n th\u1ef1c hi\u1ec7n sau khi m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS b\u1eaft \u0111\u1ea7u l\u00e0 th\u00f4ng b\u00e1o cho nh\u1eefng ng\u01b0\u1eddi trong t\u1ed5 ch\u1ee9c c\u1ee7a b\u1ea1n, nh\u1eefng ng\u01b0\u1eddi c\u00f3 th\u1ec3 h\u00e0nh \u0111\u1ed9ng. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 bao g\u1ed3m qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng, c\u00e1c b\u00ean li\u00ean quan. Ng\u01b0\u1eddi qu\u1ea3n l\u00fd c\u1ed9ng \u0111\u1ed3ng v\u00e0 b\u1ea5t k\u1ef3 ai kh\u00e1c c\u1ea7n bi\u1ebft \u0111i\u1ec1u g\u00ec \u0111ang x\u1ea3y ra tr\u01b0\u1edbc ti\u00ean. H\u1ecd n\u00ean chu\u1ea9n b\u1ecb s\u1eb5n s\u00e0ng \u0111\u1ec3 b\u1eaft \u0111\u1ea7u gi\u1ea3m thi\u1ec3u nh\u1eefng g\u00ec h\u1ecd c\u00f3 th\u1ec3 l\u00e0m t\u1eeb ph\u00eda trang web c\u1ee7a b\u1ea1n.<\/p>\n

B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 mu\u1ed1n giao ti\u1ebfp v\u1edbi kh\u00e1ch h\u00e0ng \u0111\u1ec3 cho h\u1ecd bi\u1ebft r\u1eb1ng c\u00f3 m\u1ed9t t\u00ecnh hu\u1ed1ng. Cho d\u00f9 qua email ho\u1eb7c c\u00e1c k\u00eanh truy\u1ec1n th\u00f4ng x\u00e3 h\u1ed9i.<\/p>\n

4.2. Li\u00ean h\u1ec7 v\u1edbi ISP, nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef web ho\u1eb7c d\u1ecbch v\u1ee5 b\u1ea3o m\u1eadt c\u1ee7a b\u1ea1n.<\/h3>\n

B\u01b0\u1edbc ti\u1ebfp theo ngay l\u1eadp t\u1ee9c c\u1ee7a b\u1ea1n l\u00e0 th\u00f4ng b\u00e1o cho t\u1ea5t c\u1ea3 c\u00e1c d\u1ecbch v\u1ee5 li\u00ean quan \u0111\u1ebfn vi\u1ec7c \u0111\u1ecbnh tuy\u1ebfn l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp \u0111\u1ebfn trang web c\u1ee7a b\u1ea1n r\u1eb1ng b\u1ea1n \u0111ang g\u1eb7p ph\u1ea3i m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS.\u00a0T\u1eeb \u0111\u00f3, m\u1ed7i d\u1ecbch v\u1ee5 c\u00f3 th\u1ec3 c\u1ed1 g\u1eafng gi\u1ea3m thi\u1ec3u l\u01b0u l\u01b0\u1ee3ng \u0111\u1ed9c h\u1ea1i \u0111\u1ebfn.<\/p>\n

ISP c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ecbnh tuy\u1ebfn l\u1ed7 \u0111en, gi\u00fap h\u01b0\u1edbng l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp ra kh\u1ecfi trang web c\u1ee7a b\u1ea1n v\u00e0 v\u00e0o m\u1ed9t \u201ctuy\u1ebfn \u0111\u01b0\u1eddng v\u00f4 gi\u00e1 tr\u1ecb\u201d.\u00a0C\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef web\u00a0<\/a>c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 gi\u1ea3m thi\u1ec3u t\u00e1c \u0111\u1ed9ng c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng b\u1eb1ng c\u00e1ch m\u1edf r\u1ed9ng quy m\u00f4 d\u1ecbch v\u1ee5 c\u1ee7a b\u1ea1n.\u00a0B\u1ea5t k\u1ef3 d\u1ecbch v\u1ee5 b\u1ea3o m\u1eadt n\u00e0o b\u1ea1n c\u00f3 n\u00ean c\u00f3 c\u00e1c c\u00f4ng c\u1ee5 b\u1ea3o m\u1eadt d\u00e0nh ri\u00eang cho vi\u1ec7c ng\u0103n ch\u1eb7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS.<\/p>\n

4.3. B\u1eaft \u0111\u1ea7u ch\u1eb7n l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp v\u00e0 gi\u1edbi h\u1ea1n y\u00eau c\u1ea7u<\/h3>\n

Ti\u1ebfp theo, nh\u00f3m m\u1ea1ng c\u1ee7a b\u1ea1n ho\u1eb7c ISP n\u00ean tri\u1ec3n khai Danh s\u00e1ch ki\u1ec3m so\u00e1t truy c\u1eadp d\u1ef1a tr\u00ean IP ho\u1eb7c ACL \u0111\u1ec3 ch\u1eb7n l\u01b0u l\u01b0\u1ee3ng \u0111\u1ed9c h\u1ea1i \u0111\u1ebfn t\u1eeb ngu\u1ed3n t\u1ea5n c\u00f4ng.\u00a0Trong tr\u01b0\u1eddng h\u1ee3p \u1ee9ng d\u1ee5ng ho\u1eb7c d\u1ecbch v\u1ee5 d\u1ef1a tr\u00ean web c\u1ee7a b\u1ea1n \u0111ang b\u1ecb t\u1ea5n c\u00f4ng, h\u1ecd c\u0169ng c\u00f3 th\u1ec3 tri\u1ec3n khai gi\u1edbi h\u1ea1n t\u1ed1c \u0111\u1ed9, \u00e1p \u0111\u1eb7t gi\u1edbi h\u1ea1n \u0111\u1ed1i v\u1edbi c\u00e1c k\u1ebft n\u1ed1i \u1ee9ng d\u1ee5ng \u0111\u1ed3ng th\u1eddi.\u00a0Tuy nhi\u00ean, v\u00ec gi\u1edbi h\u1ea1n t\u1ed1c \u0111\u1ed9 kh\u00f4ng th\u1ec3 ph\u00e2n bi\u1ec7t gi\u1eefa l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp h\u1ee3p ph\u00e1p v\u00e0 l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp \u0111\u1ed9c h\u1ea1i, n\u00f3 c\u00f3 th\u1ec3 t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5 \u0111\u1ed1i v\u1edbi ng\u01b0\u1eddi d\u00f9ng th\u1ef1c.<\/p>\n

4.4. Gi\u00e1m s\u00e1t cu\u1ed9c t\u1ea5n c\u00f4ng v\u00e0 ph\u00f2ng th\u1ee7 c\u1ee7a b\u1ea1n<\/h3>\n

Trong su\u1ed1t cu\u1ed9c t\u1ea5n c\u00f4ng, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 b\u1ea1n v\u00e0 nh\u00f3m c\u1ee7a b\u1ea1n ph\u1ea3i theo d\u00f5i ti\u1ebfn tr\u00ecnh c\u1ee7a n\u00f3.\u00a0B\u1ea1n s\u1ebd c\u00f3 th\u1ec3 thu th\u1eadp lo\u1ea1i t\u1ea5n c\u00f4ng \u0111\u00f3 l\u00e0 g\u00ec, m\u1ee9c \u0111\u1ed9 l\u1edbn nh\u01b0 th\u1ebf n\u00e0o, n\u00f3 \u0111\u1ebfn t\u1eeb m\u1ed9t ngu\u1ed3n hay nhi\u1ec1u ngu\u1ed3n, v\u1ecb tr\u00ed v\u00e0 danh t\u00ednh c\u1ee7a c\u00e1c ngu\u1ed3n \u0111\u00f3 c\u0169ng nh\u01b0 ki\u1ec3u t\u1ea5n c\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.<\/p>\n

T\u1ea5t c\u1ea3 th\u00f4ng tin n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng sau cu\u1ed9c t\u1ea5n c\u00f4ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1ch h\u1ec7 th\u1ed1ng ph\u00f2ng th\u1ee7 c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng \u0111\u1ec3 b\u1ea3o v\u1ec7 trang web c\u1ee7a b\u1ea1n v\u00e0 b\u1ea5t k\u1ef3 r\u1ee7i ro n\u00e0o c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c kh\u1eafc ph\u1ee5c cho c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng trong t\u01b0\u01a1ng lai.\u00a0B\u1ea1n c\u0169ng s\u1ebd mu\u1ed1n l\u01b0u \u00fd c\u00e1c ch\u1ec9 s\u1ed1, ch\u1eb3ng h\u1ea1n nh\u01b0 \u201cth\u1eddi gian \u0111\u1ec3 gi\u1ea3m thi\u1ec3u\u201d v\u00e0 \u201ct\u00ednh nh\u1ea5t qu\u00e1n c\u1ee7a vi\u1ec7c gi\u1ea3m thi\u1ec3u\u201d \u0111\u1ec3 xem ISP c\u1ee7a b\u1ea1n \u0111\u00e3 ng\u0103n ch\u1eb7n cu\u1ed9c t\u1ea5n c\u00f4ng nhanh ch\u00f3ng v\u00e0 hi\u1ec7u qu\u1ea3 nh\u01b0 th\u1ebf n\u00e0o.<\/p>\n

5. C\u00e1ch chu\u1ea9n b\u1ecb cho c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS<\/h2>\n

C\u00e1ch t\u1ed1t nh\u1ea5t \u0111\u1ec3 ng\u0103n ch\u1eb7n m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS l\u00e0 ng\u0103n ch\u1eb7n n\u00f3 x\u1ea3y ra ngay t\u1eeb \u0111\u1ea7u.\u00a0\u0110\u1ec3 gi\u1eef cho trang web c\u1ee7a b\u1ea1n an to\u00e0n v\u00e0 ho\u1ea1t \u0111\u1ed9ng, h\u00e3y l\u00e0m theo c\u00e1c b\u01b0\u1edbc sau \u0111\u1ec3 chu\u1ea9n b\u1ecb cho c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS.<\/p>\n

5.1. T\u00ecm hi\u1ec3u v\u1ec1 c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 c\u1ee7a nh\u00e0 cung c\u1ea5p v\u00e0 m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n tr\u01b0\u1edbc c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS.<\/h3>\n

ISP (nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 m\u1ea1ng) v\u00e0 m\u00e1y ch\u1ee7 l\u01b0u tr\u1eef web c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 \u0111\u00e3 c\u00f3 s\u1eb5n c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 \u0111\u1ec3 ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS.\u00a0V\u00ed d\u1ee5: M\u00e1y ch\u1ee7 t\u00edch h\u1ee3p t\u00ednh n\u0103ng DDoS<\/a> b\u1ea3o v\u1ec7 to\u00e0n di\u1ec7n.\u00a0\u0110i\u1ec1u n\u00e0y bao g\u1ed3m b\u1ea3o v\u1ec7 n\u1ed9i dung web, T\u01b0\u1eddng l\u1eeda \u1ee9ng d\u1ee5ng web d\u1ef1a tr\u00ean \u0111\u00e1m m\u00e2y, d\u1ecbch v\u1ee5 proxy ng\u01b0\u1ee3c, b\u1ea3o v\u1ec7 DDoS d\u1ef1a tr\u00ean BGP, v.v.<\/p>\n

N\u1ebfu nh\u00e0 cung c\u1ea5p c\u1ee7a b\u1ea1n kh\u00f4ng \u0111i k\u00e8m v\u1edbi c\u00e1c d\u1ecbch v\u1ee5 b\u1ea3o v\u1ec7 DDoS nh\u01b0 th\u1ebf n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 mu\u1ed1n xem x\u00e9t vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i nh\u00e0 cung c\u1ea5p ho\u1eb7c t\u1ef1 m\u00ecnh s\u1eed d\u1ee5ng b\u1ea3o m\u1eadt.<\/p>\n

5.2. L\u1eadp k\u1ebf ho\u1ea1ch \u1ee9ng ph\u00f3 v\u1edbi c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS<\/h3>\n

Trong tr\u01b0\u1eddng h\u1ee3p trang web c\u1ee7a b\u1ea1n t\u1eebng l\u00e0 m\u1ee5c ti\u00eau c\u1ee7a m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng DDoS, b\u1ea1n c\u1ea7n c\u00f3 s\u1eb5n m\u1ed9t k\u1ebf ho\u1ea1ch \u0111\u1ec3 gi\u1ea3m thi\u1ec3u n\u00f3 t\u1ed1t nh\u1ea5t c\u00f3 th\u1ec3.\u00a0Tr\u01b0\u1edbc ti\u00ean, h\u00e3y r\u00e0 so\u00e1t h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n \u0111\u1ec3 t\u00ecm b\u1ea5t k\u1ef3 \u0111i\u1ec3m y\u1ebfu ho\u1eb7c l\u1ed7 h\u1ed5ng n\u00e0o \u2013 v\u1ea1ch ra c\u00e1ch b\u1ea1n s\u1ebd lo\u1ea1i b\u1ecf nh\u1eefng v\u1ea5n \u0111\u1ec1 \u0111\u00f3.\u00a0Sau \u0111\u00f3, x\u00e1c \u0111\u1ecbnh m\u1ed9t ph\u1ea3n \u1ee9ng r\u00f5 r\u00e0ng cho c\u00f4ng ty c\u1ee7a b\u1ea1n.\u00a0Qu\u00e1 tr\u00ecnh x\u00e1c \u0111\u1ecbnh, giao ti\u1ebfp v\u00e0 gi\u1ea3m thi\u1ec3u c\u1ee7a b\u1ea1n l\u00e0 g\u00ec?<\/p>\n

Cu\u1ed1i c\u00f9ng, b\u1ea1n s\u1ebd mu\u1ed1n t\u1eadp h\u1ee3p m\u1ed9t nh\u00f3m ph\u1ea3n h\u1ed3i chuy\u00ean d\u1ee5ng c\u00f3 th\u1ec3 h\u00e0nh \u0111\u1ed9ng.\u00a0Lu\u00f4n c\u1eadp nh\u1eadt cho qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng, b\u1ed9 ph\u1eadn CNTT c\u1ee7a b\u1ea1n v\u00e0 b\u1ea5t k\u1ef3 b\u1ed9 ph\u1eadn li\u00ean quan n\u00e0o kh\u00e1c v\u1ec1 tr\u00e1ch nhi\u1ec7m c\u1ee7a h\u1ecd trong tr\u01b0\u1eddng h\u1ee3p b\u1ea1n b\u1ecb t\u1ea5n c\u00f4ng.<\/p>\n

5.3. S\u1eed d\u1ee5ng T\u01b0\u1eddng l\u1eeda \u1ee8ng d\u1ee5ng Trang web (WAF).<\/h3>\n

T\u01b0\u1eddng l\u1eeda \u1ee9ng d\u1ee5ng trang web, th\u01b0\u1eddng \u0111\u01b0\u1ee3c r\u00fat ng\u1eafn th\u00e0nh WAF. \u0110\u00e2y l\u00e0 m\u1ed9t lo\u1ea1i t\u01b0\u1eddng l\u1eeda gi\u00e1m s\u00e1t v\u00e0 l\u1ecdc l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp v\u00e0o trang web c\u1ee7a b\u1ea1n.\u00a0WAF c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh v\u00e0 ch\u1eb7n c\u00e1c y\u00eau c\u1ea7u t\u1eeb nh\u1eefng k\u1ebb t\u1ea5n c\u00f4ng trong khi cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng c\u00f3 l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp h\u1ee3p ph\u00e1p \u0111i qua v\u00e0 truy c\u1eadp trang web c\u1ee7a b\u1ea1n.\u00a0N\u00f3 x\u00e1c \u0111\u1ecbnh c\u00e1c y\u00eau c\u1ea7u \u0111\u1ed9c h\u1ea1i b\u1eb1ng c\u00e1ch t\u1eadp trung v\u00e0o d\u1eef li\u1ec7u c\u00f3 trong qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u00e3 c\u1ed1 g\u1eafng.\u00a0N\u1ebfu n\u00f3 ph\u00e1t hi\u1ec7n ra r\u1eb1ng l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp l\u00e0 \u0111\u1ed9c h\u1ea1i, n\u00f3 s\u1ebd chuy\u1ec3n h\u01b0\u1edbng n\u00f3 \u0111\u1ebfn c\u00e1c m\u1ea1ng ph\u00e2n ph\u1ed1i n\u1ed9i dung kh\u00e1c \u0111\u1ec3 ph\u00e2n ph\u1ed1i t\u1ea3i \u0111\u00f3 ra kh\u1ecfi m\u00e1y ch\u1ee7 c\u1ee7a trang web c\u1ee7a b\u1ea1n.<\/p>\n

Nhi\u1ec1u\u00a0m\u1ea1ng ph\u00e2n ph\u1ed1i n\u1ed9i dung ho\u1eb7c CDN<\/strong>, \u0111i k\u00e8m v\u1edbi WAF \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p s\u1eb5n. H\u00e3y nh\u1edb h\u1ecfi v\u1ec1 \u0111i\u1ec1u n\u00e0y khi b\u1ea1n li\u00ean h\u1ec7 v\u1edbi ISP v\u00e0 m\u00e1y ch\u1ee7 l\u01b0u tr\u1eef c\u1ee7a m\u00ecnh.<\/p>\n

5.4. Lu\u00f4n c\u1eadp nh\u1eadt t\u1ea5t c\u1ea3 c\u00e1c h\u1ec7 th\u1ed1ng v\u00e0 ph\u1ea7n m\u1ec1m<\/h3>\n

M\u1ed9t h\u1ec7 th\u1ed1ng l\u1ed7i th\u1eddi c\u00f3 th\u1ec3 \u0111\u1eb7c bi\u1ec7t d\u1ec5 b\u1ecb t\u1ea5n c\u00f4ng DDoS.\u00a0N\u1ebfu kh\u00f4ng c\u00f3 phi\u00ean b\u1ea3n m\u1edbi nh\u1ea5t c\u1ee7a b\u1ea5t k\u1ef3 ph\u1ea7n m\u1ec1m n\u00e0o b\u1ea1n s\u1eed d\u1ee5ng, trang web c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 kh\u00f4ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 ho\u00e0n to\u00e0n.\u00a0Gi\u1ed1ng nh\u01b0 h\u1ea7u h\u1ebft c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng m\u1ea1ng, c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS kh\u00f4ng ng\u1eebng ph\u00e1t tri\u1ec3n khi nh\u1eefng k\u1ebb x\u1ea5u h\u1ecdc c\u00e1ch v\u01b0\u1ee3t qua c\u00e1c h\u1ec7 th\u1ed1ng ph\u00f2ng th\u1ee7.\u00a0V\u00ec v\u1eady, \u0111\u1ec3 gi\u1eef cho trang web c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 t\u1ed1t, h\u00e3y \u0111\u1ea3m b\u1ea3o kh\u00f4ng b\u1ecf l\u1ee1 b\u1ea5t k\u1ef3 b\u1ea3n c\u1eadp nh\u1eadt ph\u1ea7n m\u1ec1m n\u00e0o.<\/p>","protected":false},"excerpt":{"rendered":"

B\u1ea1n \u0111\u00e3 bao gi\u1edd lo l\u1eafng v\u1ec1 vi\u1ec7c trang web c\u1ee7a m\u00ecnh b\u1ecb s\u1eadp ch\u01b0a? Cho d\u00f9 b\u1ea1n \u0111i\u1ec1u h\u00e0nh m\u1ed9t c\u1eeda h\u00e0ng tr\u1ef1c tuy\u1ebfn hay qu\u1ea3n l\u00fd m\u1ed9t blog, m\u1ed9t trang web b\u1ecb s\u1eadp c\u00f3 th\u1ec3 \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c m\u1ea5t l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp v\u00e0 ho\u1ea1t \u0111\u1ed9ng kinh doanh. M\u1eb7c d\u00f9 vi\u1ec7c trang […]<\/p>","protected":false},"author":1,"featured_media":16335,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[301,21],"tags":[438],"yoast_head":"\nT\u1ea5n c\u00f4ng DDoS l\u00e0 g\u00ec & b\u1ea1n c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 trang web c\u1ee7a m\u00ecnh nh\u01b0 th\u1ebf n\u00e0o?<\/title>\n<meta name=\"description\" content=\"B\u1ea1n \u0111\u00e3 bao gi\u1edd lo l\u1eafng v\u1ec1 vi\u1ec7c trang web c\u1ee7a m\u00ecnh b\u1ecb s\u1eadp ch\u01b0a? 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