{"id":476877,"date":"2023-08-09T09:04:34","date_gmt":"2023-08-09T09:04:34","guid":{"rendered":""},"modified":"2023-09-05T11:13:37","modified_gmt":"2023-09-05T11:13:37","slug":"dns-amplification-attack","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/dns-amplification-attack\/","title":{"rendered":"T\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS"},"content":{"rendered":"<h2>Gi\u1edbi thi\u1ec7u<\/h2>\n<p>DNS (H\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n) l\u00e0 th\u00e0nh ph\u1ea7n quan tr\u1ecdng c\u1ee7a c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng internet c\u00f3 ch\u1ee9c n\u0103ng d\u1ecbch t\u00ean mi\u1ec1n th\u00e0nh \u0111\u1ecba ch\u1ec9 IP, cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp c\u00e1c trang web b\u1eb1ng t\u00ean quen thu\u1ed9c c\u1ee7a h\u1ecd. M\u1eb7c d\u00f9 DNS \u0111\u00f3ng vai tr\u00f2 l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a Internet nh\u01b0ng n\u00f3 c\u0169ng d\u1ec5 b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi nhi\u1ec1u m\u1ed1i \u0111e d\u1ecda b\u1ea3o m\u1eadt kh\u00e1c nhau, m\u1ed9t trong s\u1ed1 \u0111\u00f3 l\u00e0 cu\u1ed9c t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS. B\u00e0i vi\u1ebft n\u00e0y \u0111i s\u00e2u v\u00e0o l\u1ecbch s\u1eed, c\u01a1 ch\u1ebf, lo\u1ea1i h\u00ecnh v\u00e0 bi\u1ec7n ph\u00e1p \u0111\u1ed1i ph\u00f3 c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS.<\/p>\n<h2>Ngu\u1ed3n g\u1ed1c v\u00e0 \u0111\u1ec1 c\u1eadp \u0111\u1ea7u ti\u00ean<\/h2>\n<p>Cu\u1ed9c t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS hay c\u00f2n g\u1ecdi l\u00e0 t\u1ea5n c\u00f4ng ph\u1ea3n x\u1ea1 DNS l\u1ea7n \u0111\u1ea7u ti\u00ean xu\u1ea5t hi\u1ec7n v\u00e0o \u0111\u1ea7u nh\u1eefng n\u0103m 2000. K\u1ef9 thu\u1eadt khai th\u00e1c m\u00e1y ch\u1ee7 DNS \u0111\u1ec3 khu\u1ebfch \u0111\u1ea1i t\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS (T\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5 ph\u00e2n t\u00e1n) \u0111\u01b0\u1ee3c cho l\u00e0 do k\u1ebb t\u1ea5n c\u00f4ng c\u00f3 t\u00ean \u201cDale Drew\u201d. N\u0103m 2002, Dale Drew \u0111\u00e3 tr\u00ecnh di\u1ec5n ki\u1ec3u t\u1ea5n c\u00f4ng n\u00e0y, t\u1eadn d\u1ee5ng c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng DNS \u0111\u1ec3 l\u00e0m tr\u00e0n ng\u1eadp m\u1ee5c ti\u00eau c\u00f3 l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp qu\u00e1 l\u1edbn, g\u00e2y gi\u00e1n \u0111o\u1ea1n d\u1ecbch v\u1ee5.<\/p>\n<h2>Th\u00f4ng tin chi ti\u1ebft v\u1ec1 cu\u1ed9c t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS<\/h2>\n<p>Cu\u1ed9c t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS khai th\u00e1c h\u00e0nh vi v\u1ed1n c\u00f3 c\u1ee7a m\u1ed9t s\u1ed1 m\u00e1y ch\u1ee7 DNS nh\u1ea5t \u0111\u1ecbnh \u0111\u1ec3 ph\u1ea3n h\u1ed3i c\u00e1c truy v\u1ea5n DNS l\u1edbn v\u1edbi c\u00e1c ph\u1ea3n h\u1ed3i th\u1eadm ch\u00ed c\u00f2n l\u1edbn h\u01a1n. N\u00f3 t\u1eadn d\u1ee5ng c\u00e1c tr\u00ecnh ph\u00e2n gi\u1ea3i DNS m\u1edf, ch\u1ea5p nh\u1eadn v\u00e0 ph\u1ea3n h\u1ed3i c\u00e1c truy v\u1ea5n DNS t\u1eeb b\u1ea5t k\u1ef3 ngu\u1ed3n n\u00e0o, thay v\u00ec ch\u1ec9 ph\u1ea3n h\u1ed3i c\u00e1c truy v\u1ea5n t\u1eeb trong m\u1ea1ng ri\u00eang c\u1ee7a ch\u00fang.<\/p>\n<h2>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS<\/h2>\n<p>Cu\u1ed9c t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS th\u01b0\u1eddng bao g\u1ed3m c\u00e1c b\u01b0\u1edbc sau:<\/p>\n<ol>\n<li>\n<p><strong>IP ngu\u1ed3n gi\u1ea3 m\u1ea1o:<\/strong> K\u1ebb t\u1ea5n c\u00f4ng gi\u1ea3 m\u1ea1o \u0111\u1ecba ch\u1ec9 IP ngu\u1ed3n c\u1ee7a h\u1ecd, khi\u1ebfn n\u00f3 xu\u1ea5t hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng \u0111\u1ecba ch\u1ec9 IP c\u1ee7a n\u1ea1n nh\u00e2n.<\/p>\n<\/li>\n<li>\n<p><strong>Truy v\u1ea5n DNS:<\/strong> K\u1ebb t\u1ea5n c\u00f4ng g\u1eedi truy v\u1ea5n DNS cho m\u1ed9t t\u00ean mi\u1ec1n c\u1ee5 th\u1ec3 t\u1edbi tr\u00ecnh ph\u00e2n gi\u1ea3i DNS m\u1edf, khi\u1ebfn n\u00f3 tr\u00f4ng nh\u01b0 th\u1ec3 y\u00eau c\u1ea7u \u0111\u1ebfn t\u1eeb n\u1ea1n nh\u00e2n.<\/p>\n<\/li>\n<li>\n<p><strong>Ph\u1ea3n h\u1ed3i khu\u1ebfch \u0111\u1ea1i:<\/strong> Tr\u00ecnh ph\u00e2n gi\u1ea3i DNS m\u1edf, gi\u1ea3 s\u1eed y\u00eau c\u1ea7u l\u00e0 h\u1ee3p ph\u00e1p, s\u1ebd ph\u1ea3n h\u1ed3i b\u1eb1ng ph\u1ea3n h\u1ed3i DNS l\u1edbn h\u01a1n nhi\u1ec1u. Ph\u1ea3n h\u1ed3i n\u00e0y \u0111\u01b0\u1ee3c g\u1eedi \u0111\u1ebfn \u0111\u1ecba ch\u1ec9 IP c\u1ee7a n\u1ea1n nh\u00e2n, l\u00e0m qu\u00e1 t\u1ea3i dung l\u01b0\u1ee3ng m\u1ea1ng c\u1ee7a h\u1ecd.<\/p>\n<\/li>\n<li>\n<p><strong>Hi\u1ec7u \u1ee9ng DDoS:<\/strong> V\u1edbi nhi\u1ec1u tr\u00ecnh ph\u00e2n gi\u1ea3i DNS m\u1edf g\u1eedi ph\u1ea3n h\u1ed3i khu\u1ebfch \u0111\u1ea1i \u0111\u1ebfn IP c\u1ee7a n\u1ea1n nh\u00e2n, m\u1ea1ng c\u1ee7a m\u1ee5c ti\u00eau s\u1ebd tr\u00e0n ng\u1eadp l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp, d\u1eabn \u0111\u1ebfn gi\u00e1n \u0111o\u1ea1n d\u1ecbch v\u1ee5 ho\u1eb7c th\u1eadm ch\u00ed t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5 ho\u00e0n to\u00e0n.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS<\/h2>\n<ul>\n<li>\n<p><strong>H\u1ec7 s\u1ed1 khu\u1ebfch \u0111\u1ea1i:<\/strong> Y\u1ebfu t\u1ed1 khu\u1ebfch \u0111\u1ea1i l\u00e0 m\u1ed9t \u0111\u1eb7c \u0111i\u1ec3m quan tr\u1ecdng c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng n\u00e0y. N\u00f3 bi\u1ec3u th\u1ecb t\u1ef7 l\u1ec7 k\u00edch th\u01b0\u1edbc c\u1ee7a ph\u1ea3n h\u1ed3i DNS v\u1edbi k\u00edch th\u01b0\u1edbc c\u1ee7a truy v\u1ea5n DNS. H\u1ec7 s\u1ed1 khu\u1ebfch \u0111\u1ea1i c\u00e0ng cao th\u00ec \u0111\u00f2n t\u1ea5n c\u00f4ng c\u00e0ng g\u00e2y s\u00e1t th\u01b0\u01a1ng.<\/p>\n<\/li>\n<li>\n<p><strong>Gi\u1ea3 m\u1ea1o ngu\u1ed3n l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp:<\/strong> Nh\u1eefng k\u1ebb t\u1ea5n c\u00f4ng gi\u1ea3 m\u1ea1o \u0111\u1ecba ch\u1ec9 IP ngu\u1ed3n trong c\u00e1c truy v\u1ea5n DNS c\u1ee7a ch\u00fang, khi\u1ebfn vi\u1ec7c truy t\u00ecm ngu\u1ed3n th\u1ef1c s\u1ef1 c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng tr\u1edf n\u00ean kh\u00f3 kh\u0103n.<\/p>\n<\/li>\n<li>\n<p><strong>S\u1ef1 ph\u1ea3n x\u1ea1:<\/strong> Cu\u1ed9c t\u1ea5n c\u00f4ng s\u1eed d\u1ee5ng tr\u00ecnh ph\u00e2n gi\u1ea3i DNS l\u00e0m b\u1ed9 khu\u1ebfch \u0111\u1ea1i, ph\u1ea3n \u00e1nh v\u00e0 khu\u1ebfch \u0111\u1ea1i l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp v\u1ec1 ph\u00eda n\u1ea1n nh\u00e2n.<\/p>\n<\/li>\n<\/ul>\n<h2>C\u00e1c lo\u1ea1i t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS<\/h2>\n<p>C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i d\u1ef1a tr\u00ean lo\u1ea1i b\u1ea3n ghi DNS \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho cu\u1ed9c t\u1ea5n c\u00f4ng. C\u00e1c lo\u1ea1i ph\u1ed5 bi\u1ebfn l\u00e0:<\/p>\n<table>\n<thead>\n<tr>\n<th>Ki\u1ec3u t\u1ea5n c\u00f4ng<\/th>\n<th>B\u1ea3n ghi DNS \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng<\/th>\n<th>H\u1ec7 s\u1ed1 khu\u1ebfch \u0111\u1ea1i<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>DNS th\u00f4ng th\u01b0\u1eddng<\/td>\n<td>M\u1ed8T<\/td>\n<td>1-10x<\/td>\n<\/tr>\n<tr>\n<td>DNSSEC<\/td>\n<td>B\u1ea4T K\u00cc<\/td>\n<td>20-30x<\/td>\n<\/tr>\n<tr>\n<td>DNSSEC v\u1edbi EDNS0<\/td>\n<td>B\u1ea4T K\u1ef2 + EDNS0<\/td>\n<td>100-200x<\/td>\n<\/tr>\n<tr>\n<td>T\u00ean mi\u1ec1n kh\u00f4ng t\u1ed3n t\u1ea1i<\/td>\n<td>B\u1ea4T K\u00cc<\/td>\n<td>100-200x<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1c c\u00e1ch s\u1eed d\u1ee5ng cu\u1ed9c t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p<\/h2>\n<h3>C\u00e1c c\u00e1ch s\u1eed d\u1ee5ng t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS<\/h3>\n<ol>\n<li>\n<p><strong>T\u1ea5n c\u00f4ng DDoS:<\/strong> M\u1ee5c \u0111\u00edch ch\u00ednh c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS l\u00e0 kh\u1edfi \u0111\u1ed9ng c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS nh\u1eb1m v\u00e0o c\u00e1c m\u1ee5c ti\u00eau c\u1ee5 th\u1ec3. B\u1eb1ng c\u00e1ch \u00e1p \u0111\u1ea3o c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng c\u1ee7a m\u1ee5c ti\u00eau, c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng n\u00e0y nh\u1eb1m m\u1ee5c \u0111\u00edch l\u00e0m gi\u00e1n \u0111o\u1ea1n c\u00e1c d\u1ecbch v\u1ee5 v\u00e0 g\u00e2y ra th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng.<\/p>\n<\/li>\n<li>\n<p><strong>Gi\u1ea3 m\u1ea1o \u0111\u1ecba ch\u1ec9 IP:<\/strong> Cu\u1ed9c t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u00e0m x\u00e1o tr\u1ed9n ngu\u1ed3n th\u1ef1c s\u1ef1 c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng b\u1eb1ng c\u00e1ch t\u1eadn d\u1ee5ng vi\u1ec7c gi\u1ea3 m\u1ea1o \u0111\u1ecba ch\u1ec9 IP, khi\u1ebfn nh\u1eefng ng\u01b0\u1eddi b\u1ea3o v\u1ec7 kh\u00f3 truy t\u00ecm ngu\u1ed3n g\u1ed1c ch\u00ednh x\u00e1c.<\/p>\n<\/li>\n<\/ol>\n<h3>V\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p<\/h3>\n<ul>\n<li>\n<p><strong>M\u1edf b\u1ed9 gi\u1ea3i quy\u1ebft DNS:<\/strong> V\u1ea5n \u0111\u1ec1 ch\u00ednh l\u00e0 s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a c\u00e1c tr\u00ecnh ph\u00e2n gi\u1ea3i DNS m\u1edf tr\u00ean internet. Qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng n\u00ean b\u1ea3o m\u1eadt m\u00e1y ch\u1ee7 DNS c\u1ee7a h\u1ecd v\u00e0 \u0111\u1ecbnh c\u1ea5u h\u00ecnh ch\u00fang \u0111\u1ec3 ch\u1ec9 ph\u1ea3n h\u1ed3i c\u00e1c truy v\u1ea5n h\u1ee3p ph\u00e1p t\u1eeb b\u00ean trong m\u1ea1ng c\u1ee7a h\u1ecd.<\/p>\n<\/li>\n<li>\n<p><strong>L\u1ecdc g\u00f3i:<\/strong> ISP v\u00e0 qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng c\u00f3 th\u1ec3 tri\u1ec3n khai t\u00ednh n\u0103ng l\u1ecdc g\u00f3i \u0111\u1ec3 ch\u1eb7n c\u00e1c truy v\u1ea5n DNS c\u00f3 IP ngu\u1ed3n gi\u1ea3 m\u1ea1o r\u1eddi kh\u1ecfi m\u1ea1ng c\u1ee7a h\u1ecd.<\/p>\n<\/li>\n<li>\n<p><strong>Gi\u1edbi h\u1ea1n t\u1ed1c \u0111\u1ed9 ph\u1ea3n h\u1ed3i DNS (DNS RRL):<\/strong> Vi\u1ec7c tri\u1ec3n khai DNS RRL tr\u00ean m\u00e1y ch\u1ee7 DNS c\u00f3 th\u1ec3 gi\u00fap gi\u1ea3m thi\u1ec3u t\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS b\u1eb1ng c\u00e1ch h\u1ea1n ch\u1ebf t\u1ed1c \u0111\u1ed9 ch\u00fang ph\u1ea3n h\u1ed3i c\u00e1c truy v\u1ea5n t\u1eeb c\u00e1c \u0111\u1ecba ch\u1ec9 IP c\u1ee5 th\u1ec3.<\/p>\n<\/li>\n<\/ul>\n<h2>\u0110\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 so s\u00e1nh<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u0111\u1eb7c tr\u01b0ng<\/th>\n<th>T\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS<\/th>\n<th>T\u1ea5n c\u00f4ng gi\u1ea3 m\u1ea1o DNS<\/th>\n<th>Ng\u1ed9 \u0111\u1ed9c b\u1ed9 \u0111\u1ec7m DNS<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Kh\u00e1ch quan<\/td>\n<td>DDoS<\/td>\n<td>Thao t\u00e1c d\u1eef li\u1ec7u<\/td>\n<td>Thao t\u00e1c d\u1eef li\u1ec7u<\/td>\n<\/tr>\n<tr>\n<td>Ki\u1ec3u t\u1ea5n c\u00f4ng<\/td>\n<td>D\u1ef1a tr\u00ean s\u1ef1 ph\u1ea3n \u00e1nh<\/td>\n<td>Ng\u01b0\u1eddi \u0111\u00e0n \u00f4ng \u1edf gi\u1eefa<\/td>\n<td>D\u1ef1a tr\u00ean ti\u00eam<\/td>\n<\/tr>\n<tr>\n<td>H\u1ec7 s\u1ed1 khu\u1ebfch \u0111\u1ea1i<\/td>\n<td>Cao<\/td>\n<td>Th\u1ea5p<\/td>\n<td>Kh\u00f4ng c\u00f3<\/td>\n<\/tr>\n<tr>\n<td>M\u1ee9c \u0111\u1ed9 r\u1ee7i ro<\/td>\n<td>Cao<\/td>\n<td>Trung b\u00ecnh<\/td>\n<td>Trung b\u00ecnh<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 t\u01b0\u01a1ng lai<\/h2>\n<p>Cu\u1ed9c chi\u1ebfn ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n khi c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u v\u00e0 chuy\u00ean gia an ninh m\u1ea1ng li\u00ean t\u1ee5c ngh\u0129 ra c\u00e1c k\u1ef9 thu\u1eadt gi\u1ea3m thi\u1ec3u m\u1edbi. C\u00e1c c\u00f4ng ngh\u1ec7 trong t\u01b0\u01a1ng lai c\u00f3 th\u1ec3 bao g\u1ed3m:<\/p>\n<ul>\n<li>\n<p><strong>Ph\u00f2ng th\u1ee7 d\u1ef1a tr\u00ean h\u1ecdc m\u00e1y:<\/strong> S\u1eed d\u1ee5ng thu\u1eadt to\u00e1n h\u1ecdc m\u00e1y \u0111\u1ec3 ph\u00e1t hi\u1ec7n v\u00e0 gi\u1ea3m thi\u1ec3u c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS trong th\u1eddi gian th\u1ef1c.<\/p>\n<\/li>\n<li>\n<p><strong>Tri\u1ec3n khai DNSSEC:<\/strong> Vi\u1ec7c \u00e1p d\u1ee5ng r\u1ed9ng r\u00e3i DNSSEC (Ti\u1ec7n \u00edch m\u1edf r\u1ed9ng b\u1ea3o m\u1eadt h\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n) c\u00f3 th\u1ec3 gi\u00fap ng\u0103n ch\u1eb7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS khai th\u00e1c B\u1ea4T K\u1ef2 b\u1ea3n ghi n\u00e0o.<\/p>\n<\/li>\n<\/ul>\n<h2>M\u00e1y ch\u1ee7 proxy v\u00e0 cu\u1ed9c t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS<\/h2>\n<p>C\u00e1c m\u00e1y ch\u1ee7 proxy, bao g\u1ed3m c\u1ea3 c\u00e1c m\u00e1y ch\u1ee7 do OneProxy cung c\u1ea5p, c\u00f3 th\u1ec3 v\u00f4 t\u00ecnh tr\u1edf th\u00e0nh m\u1ed9t ph\u1ea7n c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS n\u1ebfu ch\u00fang b\u1ecb \u0111\u1ecbnh c\u1ea5u h\u00ecnh sai ho\u1eb7c cho ph\u00e9p l\u01b0u l\u01b0\u1ee3ng DNS t\u1eeb b\u1ea5t k\u1ef3 ngu\u1ed3n n\u00e0o. Nh\u00e0 cung c\u1ea5p m\u00e1y ch\u1ee7 proxy ph\u1ea3i th\u1ef1c hi\u1ec7n c\u00e1c b\u01b0\u1edbc \u0111\u1ec3 b\u1ea3o m\u1eadt m\u00e1y ch\u1ee7 c\u1ee7a m\u00ecnh v\u00e0 ng\u0103n ch\u00fang tham gia v\u00e0o c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng nh\u01b0 v\u1eady.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS, h\u00e3y xem x\u00e9t kh\u00e1m ph\u00e1 c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n<ol>\n<li><a href=\"https:\/\/us-cert.cisa.gov\/ncas\/alerts\/TA13-088A\" target=\"_new\" rel=\"noopener nofollow\">C\u1ea3nh b\u00e1o US-CERT (TA13-088A): T\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS<\/a><\/li>\n<li><a href=\"https:\/\/tools.ietf.org\/html\/rfc5358\" target=\"_new\" rel=\"noopener nofollow\">RFC 5358 \u2013 Ng\u0103n ch\u1eb7n vi\u1ec7c s\u1eed d\u1ee5ng m\u00e1y ch\u1ee7 DNS \u0111\u1ec7 quy trong c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng ph\u1ea3n x\u1ea1<\/a><\/li>\n<li><a href=\"https:\/\/www.akamai.com\/us\/en\/multimedia\/documents\/white-paper\/dns-amplification-attacks-and-response-policy-zones-wp.pdf\" target=\"_new\" rel=\"noopener nofollow\">V\u00f9ng ch\u00ednh s\u00e1ch ph\u1ea3n h\u1ed3i v\u00e0 t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS (RPZ)<\/a><\/li>\n<\/ol>\n<p>H\u00e3y nh\u1edb r\u1eb1ng ki\u1ebfn th\u1ee9c v\u00e0 nh\u1eadn th\u1ee9c l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 ch\u1ed1ng l\u1ea1i c\u00e1c m\u1ed1i \u0111e d\u1ecda tr\u00ean m\u1ea1ng nh\u01b0 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i DNS. Lu\u00f4n c\u1eadp nh\u1eadt th\u00f4ng tin, c\u1ea3nh gi\u00e1c v\u00e0 b\u1ea3o m\u1eadt c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng internet c\u1ee7a b\u1ea1n \u0111\u1ec3 b\u1ea3o v\u1ec7 kh\u1ecfi nh\u1eefng m\u1ed1i nguy hi\u1ec3m ti\u1ec1m \u1ea9n n\u00e0y.<\/p>","protected":false},"featured_media":476878,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476877","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>DNS Amplification Attack: Unveiling the Threat<\/mark>","faq_items":[{"question":"What is a DNS amplification attack?","answer":"<p>A DNS amplification attack is a type of cyber threat that exploits open DNS resolvers to flood a target's network with overwhelming traffic. The attacker sends DNS queries with forged source IP addresses to these open resolvers, which then respond with much larger DNS responses, amplifying the traffic directed towards the victim. This can lead to a Distributed Denial of Service (DDoS) situation, disrupting the target's services.<\/p>"},{"question":"How did DNS amplification attacks originate?","answer":"<p>The first mention of DNS amplification attacks can be traced back to the early 2000s, with an attacker named \"Dale Drew\" demonstrating this technique. By leveraging open DNS resolvers, he showcased how attackers could magnify the impact of DDoS attacks, causing service disruptions.<\/p>"},{"question":"How does a DNS amplification attack work?","answer":"<p>The internal structure of a DNS amplification attack involves several steps. First, the attacker spoofs their source IP address to make it appear as the victim's IP. Then, they send DNS queries to open DNS resolvers, making it seem like the requests are coming from the victim. The open resolvers, assuming the requests are legitimate, respond with larger DNS responses, which flood the victim's network, causing a DDoS effect.<\/p>"},{"question":"What are the key features of DNS amplification attacks?","answer":"<p>The key features of DNS amplification attacks include the amplification factor, which represents the ratio of DNS response size to query size. Additionally, traffic source spoofing is used to hide the true origin of the attack. Reflection is also a crucial aspect, as open DNS resolvers amplify the attack traffic towards the victim.<\/p>"},{"question":"What types of DNS amplification attacks exist?","answer":"<p>DNS amplification attacks can be categorized based on the type of DNS record used for the attack. Common types include Regular DNS, DNSSEC, DNSSEC with EDNS0, and Non-Existent Domain attacks. Each type varies in its amplification factor and potential impact on the target.<\/p>"},{"question":"How can DNS amplification attacks be used, and what are the problems and solutions?","answer":"<p>DNS amplification attacks are primarily used to launch DDoS attacks, causing service disruptions. The main problem lies in the existence of open DNS resolvers, which attackers exploit. Solutions include securing DNS servers, implementing packet filtering, and using DNS Response Rate Limiting (DNS RRL).<\/p>"},{"question":"How does DNS amplification attack compare with other DNS-related threats?","answer":"<p>DNS amplification attacks differ from DNS spoofing attacks and DNS cache poisoning. While DNS amplification aims for DDoS, DNS spoofing manipulates data and DNS cache poisoning injects false data into DNS caches.<\/p>"},{"question":"What are the future perspectives and technologies related to DNS amplification attacks?","answer":"<p>The future holds promising technologies, such as machine learning-based defenses and wider adoption of DNSSEC, to mitigate DNS amplification attacks effectively.<\/p>"},{"question":"How are proxy servers associated with DNS amplification attacks?","answer":"<p>Proxy servers, like those provided by OneProxy, may inadvertently be part of DNS amplification attacks if misconfigured or allowing DNS traffic from any source. OneProxy ensures secure servers, preventing such risks.<\/p>"},{"question":"Where can I find more information about DNS amplification attacks?","answer":"<p>For further information, you can explore the following resources:<\/p><ol><li><a href=\"https:\/\/us-cert.cisa.gov\/ncas\/alerts\/TA13-088A\" target=\"_new\">US-CERT Alert (TA13-088A): DNS Amplification Attacks<\/a><\/li><li><a href=\"https:\/\/tools.ietf.org\/html\/rfc5358\" target=\"_new\">RFC 5358 - Preventing Use of Recursive DNS Servers in Reflector Attacks<\/a><\/li><li><a href=\"https:\/\/www.akamai.com\/us\/en\/multimedia\/documents\/white-paper\/dns-amplification-attacks-and-response-policy-zones-wp.pdf\" target=\"_new\">DNS Amplification Attacks and Response Policy Zones (RPZ)<\/a><\/li><\/ol>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476877","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476877\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/476878"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=476877"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}