{"id":479038,"date":"2023-08-09T10:01:33","date_gmt":"2023-08-09T10:01:33","guid":{"rendered":""},"modified":"2023-09-05T11:18:03","modified_gmt":"2023-09-05T11:18:03","slug":"smurf-attack","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/smurf-attack\/","title":{"rendered":"t\u1ea5n c\u00f4ng x\u00ec trum"},"content":{"rendered":"<p>Cu\u1ed9c t\u1ea5n c\u00f4ng Smurf l\u00e0 m\u1ed9t lo\u1ea1i t\u1ea5n c\u00f4ng t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5 ph\u00e2n t\u00e1n (DDoS) khai th\u00e1c Giao th\u1ee9c tin nh\u1eafn \u0111i\u1ec1u khi\u1ec3n Internet (ICMP) \u0111\u1ec3 \u00e1p \u0111\u1ea3o m\u1ea1ng m\u1ee5c ti\u00eau v\u1edbi l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp kh\u1ed5ng l\u1ed3. Cu\u1ed9c t\u1ea5n c\u00f4ng n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn s\u1ef1 gi\u00e1n \u0111o\u1ea1n d\u1ecbch v\u1ee5 nghi\u00eam tr\u1ecdng, khi\u1ebfn ng\u01b0\u1eddi d\u00f9ng h\u1ee3p ph\u00e1p kh\u00f4ng th\u1ec3 truy c\u1eadp \u0111\u01b0\u1ee3c t\u00e0i nguy\u00ean c\u1ee7a m\u1ee5c ti\u00eau. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd \u0111i s\u00e2u v\u00e0o l\u1ecbch s\u1eed, nguy\u00ean t\u1eafc ho\u1ea1t \u0111\u1ed9ng, c\u00e1c lo\u1ea1i v\u00e0 gi\u1ea3i ph\u00e1p ti\u1ec1m n\u0103ng li\u00ean quan \u0111\u1ebfn c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng Smurf. Ngo\u00e0i ra, ch\u00fang t\u00f4i s\u1ebd kh\u00e1m ph\u00e1 c\u00e1ch c\u00e1c m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 li\u00ean quan v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 gi\u1ea3m thi\u1ec3u c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng nh\u01b0 v\u1eady.<\/p>\n<h2>L\u1ecbch s\u1eed v\u1ec1 ngu\u1ed3n g\u1ed1c c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng Smurf v\u00e0 l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn n\u00f3<\/h2>\n<p>Cu\u1ed9c t\u1ea5n c\u00f4ng c\u1ee7a X\u00ec Trum \u0111\u01b0\u1ee3c ghi l\u1ea1i l\u1ea7n \u0111\u1ea7u ti\u00ean v\u00e0o n\u0103m 1997 b\u1edfi m\u1ed9t c\u00e1 nh\u00e2n t\u00ean l\u00e0 Michal Zalewski. N\u00f3 \u0111\u01b0\u1ee3c \u0111\u1eb7t theo t\u00ean c\u1ee7a c\u00e1c nh\u00e2n v\u1eadt ho\u1ea1t h\u00ecnh n\u1ed5i ti\u1ebfng, \u201cThe Smurfs\u201d, v\u00ec cu\u1ed9c t\u1ea5n c\u00f4ng gi\u1ed1ng v\u1edbi h\u00e0nh vi t\u1ee5 t\u1eadp v\u1edbi s\u1ed1 l\u01b0\u1ee3ng l\u1edbn c\u1ee7a ch\u00fang. Cu\u1ed9c t\u1ea5n c\u00f4ng n\u00e0y n\u1ed5i ti\u1ebfng khi n\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e1 ho\u1ea1i m\u1ed9t s\u1ed1 trang web v\u00e0 d\u1ecbch v\u1ee5 n\u1ed5i ti\u1ebfng v\u00e0o cu\u1ed1i nh\u1eefng n\u0103m 1990 v\u00e0 \u0111\u1ea7u nh\u1eefng n\u0103m 2000.<\/p>\n<h2>Th\u00f4ng tin chi ti\u1ebft v\u1ec1 cu\u1ed9c t\u1ea5n c\u00f4ng c\u1ee7a Smurf<\/h2>\n<p>Cu\u1ed9c t\u1ea5n c\u00f4ng Smurf \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng khu\u1ebfch \u0111\u1ea1i ICMP, trong \u0111\u00f3 k\u1ebb t\u1ea5n c\u00f4ng l\u1ee3i d\u1ee5ng s\u1ef1 tin c\u1eady v\u1ed1n c\u00f3 trong c\u00e1c g\u00f3i ICMP. Cu\u1ed9c t\u1ea5n c\u00f4ng li\u00ean quan \u0111\u1ebfn ba th\u1ef1c th\u1ec3 ch\u00ednh: k\u1ebb t\u1ea5n c\u00f4ng, b\u1ed9 khu\u1ebfch \u0111\u1ea1i trung gian v\u00e0 n\u1ea1n nh\u00e2n. K\u1ebb t\u1ea5n c\u00f4ng gi\u1ea3 m\u1ea1o \u0111\u1ecba ch\u1ec9 IP c\u1ee7a n\u1ea1n nh\u00e2n v\u00e0 g\u1eedi m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng l\u1edbn y\u00eau c\u1ea7u ti\u1ebfng vang ICMP (ping) \u0111\u1ebfn \u0111\u1ecba ch\u1ec9 qu\u1ea3ng b\u00e1 c\u1ee7a m\u1ea1ng. Nh\u1eefng y\u00eau c\u1ea7u n\u00e0y sau \u0111\u00f3 \u0111\u01b0\u1ee3c c\u00e1c b\u1ed9 khu\u1ebfch \u0111\u1ea1i trung gian chuy\u1ec3n ti\u1ebfp \u0111\u1ebfn IP c\u1ee7a n\u1ea1n nh\u00e2n, d\u1eabn \u0111\u1ebfn m\u1ed9t lo\u1ea1t ph\u1ea3n h\u1ed3i tr\u00e0n ng\u1eadp m\u1ea1ng c\u1ee7a n\u1ea1n nh\u00e2n.<\/p>\n<h2>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng Smurf. C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng Smurf<\/h2>\n<ol>\n<li>\n<p><strong>K\u1ebb t\u1ea5n c\u00f4ng gi\u1ea3 m\u1ea1o:<\/strong> K\u1ebb t\u1ea5n c\u00f4ng t\u1ea1o ra c\u00e1c y\u00eau c\u1ea7u ti\u1ebfng vang ICMP v\u1edbi \u0111\u1ecba ch\u1ec9 IP c\u1ee7a n\u1ea1n nh\u00e2n l\u00e0 ngu\u1ed3n v\u00e0 \u0111\u1ecba ch\u1ec9 IP qu\u1ea3ng b\u00e1 l\u00e0 \u0111\u00edch.<\/p>\n<\/li>\n<li>\n<p><strong>Khu\u1ebfch \u0111\u1ea1i:<\/strong> K\u1ebb t\u1ea5n c\u00f4ng g\u1eedi c\u00e1c g\u00f3i \u0111\u01b0\u1ee3c t\u1ea1o th\u1ee7 c\u00f4ng n\u00e0y \u0111\u1ebfn nhi\u1ec1u m\u1ea1ng trung gian \u0111\u00e3 b\u1eadt t\u00ednh n\u0103ng ph\u00e1t s\u00f3ng theo h\u01b0\u1edbng IP c\u1ee7a ch\u00fang.<\/p>\n<\/li>\n<li>\n<p><strong>Khu\u1ebfch \u0111\u1ea1i ph\u00e1t s\u00f3ng:<\/strong> C\u00e1c m\u1ea1ng trung gian tin r\u1eb1ng c\u00e1c y\u00eau c\u1ea7u l\u00e0 h\u1ee3p ph\u00e1p n\u00ean s\u1ebd ph\u00e1t c\u00e1c y\u00eau c\u1ea7u ti\u1ebfng vang ICMP t\u1edbi t\u1ea5t c\u1ea3 c\u00e1c thi\u1ebft b\u1ecb trong m\u1ea1ng c\u1ee7a h\u1ecd.<\/p>\n<\/li>\n<li>\n<p><strong>L\u0169 l\u1ee5t \u1ee9ng ph\u00f3:<\/strong> M\u1ed7i thi\u1ebft b\u1ecb trong m\u1ea1ng trung gian \u0111\u1ec1u ph\u1ea3n h\u1ed3i y\u00eau c\u1ea7u ph\u00e1t s\u00f3ng, t\u1ea1o ra m\u1ed9t lo\u1ea1t c\u00e1c ph\u1ea3n h\u1ed3i ti\u1ebfng vang ICMP tr\u00e0n ng\u1eadp m\u1ea1ng c\u1ee7a n\u1ea1n nh\u00e2n.<\/p>\n<\/li>\n<\/ol>\n<h2>Ph\u00e2n t\u00edch c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng Smurf<\/h2>\n<p>Cu\u1ed9c t\u1ea5n c\u00f4ng c\u1ee7a Smurf s\u1edf h\u1eefu m\u1ed9t s\u1ed1 t\u00ednh n\u0103ng \u0111\u1eb7c bi\u1ec7t:<\/p>\n<ul>\n<li>\n<p><strong>Khu\u1ebfch \u0111\u1ea1i:<\/strong> Cu\u1ed9c t\u1ea5n c\u00f4ng khai th\u00e1c khu\u1ebfch \u0111\u1ea1i ph\u00e1t s\u00f3ng \u0111\u1ec3 t\u1ea1o ra m\u1ed9t l\u01b0\u1ee3ng l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp \u0111\u00e1ng k\u1ec3 ch\u1ed1ng l\u1ea1i n\u1ea1n nh\u00e2n.<\/p>\n<\/li>\n<li>\n<p><strong>Gi\u1ea3 m\u1ea1o IP:<\/strong> K\u1ebb t\u1ea5n c\u00f4ng ng\u1ee5y trang danh t\u00ednh c\u1ee7a h\u1ecd b\u1eb1ng c\u00e1ch gi\u1ea3 m\u1ea1o \u0111\u1ecba ch\u1ec9 IP c\u1ee7a n\u1ea1n nh\u00e2n, khi\u1ebfn vi\u1ec7c truy t\u00ecm ngu\u1ed3n g\u1ed1c 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>L\u1ed7 h\u1ed5ng ICMP:<\/strong> Cu\u1ed9c t\u1ea5n c\u00f4ng l\u1ee3i d\u1ee5ng l\u1ed7 h\u1ed5ng c\u1ee7a giao th\u1ee9c ICMP, th\u01b0\u1eddng \u0111\u01b0\u1ee3c cho ph\u00e9p trong h\u1ea7u h\u1ebft c\u00e1c m\u1ea1ng.<\/p>\n<\/li>\n<\/ul>\n<h2>C\u00e1c ki\u1ec3u t\u1ea5n c\u00f4ng c\u1ee7a Smurf<\/h2>\n<p>C\u00f3 hai lo\u1ea1i t\u1ea5n c\u00f4ng Smurf ch\u00ednh:<\/p>\n<ol>\n<li>\n<p><strong>T\u1ea5n c\u00f4ng Smurf truy\u1ec1n th\u1ed1ng:<\/strong> Trong ki\u1ec3u n\u00e0y, k\u1ebb t\u1ea5n c\u00f4ng tr\u1ef1c ti\u1ebfp gi\u1ea3 m\u1ea1o \u0111\u1ecba ch\u1ec9 IP c\u1ee7a n\u1ea1n nh\u00e2n v\u00e0 ph\u00e1t c\u00e1c y\u00eau c\u1ea7u ti\u1ebfng vang ICMP t\u1edbi c\u00e1c m\u1ea1ng trung gian.<\/p>\n<\/li>\n<li>\n<p><strong>T\u1ea5n c\u00f4ng m\u1ea3nh v\u1ee1:<\/strong> T\u01b0\u01a1ng t\u1ef1 nh\u01b0 cu\u1ed9c t\u1ea5n c\u00f4ng Smurf truy\u1ec1n th\u1ed1ng, nh\u01b0ng thay v\u00ec ICMP, k\u1ebb t\u1ea5n c\u00f4ng s\u1eed d\u1ee5ng giao th\u1ee9c Giao th\u1ee9c g\u00f3i d\u1eef li\u1ec7u ng\u01b0\u1eddi d\u00f9ng (UDP), th\u01b0\u1eddng nh\u1eafm m\u1ee5c ti\u00eau v\u00e0o c\u1ed5ng 7 (echo) v\u00e0 c\u1ed5ng 19 (chargen).<\/p>\n<\/li>\n<\/ol>\n<p>H\u00e3y t\u00f3m t\u1eaft c\u00e1c ki\u1ec3u t\u1ea5n c\u00f4ng Smurf trong b\u1ea3ng:<\/p>\n<table>\n<thead>\n<tr>\n<th>Ki\u1ec3u t\u1ea5n c\u00f4ng<\/th>\n<th>Giao th\u1ee9c<\/th>\n<th>(C\u00e1c) c\u1ed5ng m\u1ee5c ti\u00eau<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>X\u00ec trum truy\u1ec1n th\u1ed1ng<\/td>\n<td>ICMP<\/td>\n<td>Kh\u00f4ng c\u00f3 (Ph\u00e1t s\u00f3ng)<\/td>\n<\/tr>\n<tr>\n<td>T\u1ea5n c\u00f4ng m\u1ea3nh v\u1ee1<\/td>\n<td>UDP<\/td>\n<td>C\u1ea3ng 7, C\u1ea3ng 19<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1c c\u00e1ch s\u1eed d\u1ee5ng t\u1ea5n c\u00f4ng Smurf, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng<\/h2>\n<h3>C\u00e1c c\u00e1ch s\u1eed d\u1ee5ng \u0111\u00f2n t\u1ea5n c\u00f4ng Smurf:<\/h3>\n<ul>\n<li>Vi\u1ec7c kh\u1edfi \u0111\u1ed9ng m\u1ed9t cu\u1ed9c t\u1ea5n c\u00f4ng Smurf c\u00f3 th\u1ec3 t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u01a1n gi\u1ea3n do c\u00f3 s\u1eb5n c\u00e1c c\u00f4ng c\u1ee5 v\u00e0 t\u1eadp l\u1ec7nh t\u1ef1 \u0111\u1ed9ng h\u00f3a quy tr\u00ecnh.<\/li>\n<li>T\u1ed9i ph\u1ea1m m\u1ea1ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng Smurf \u0111\u1ec3 nh\u1eafm m\u1ee5c ti\u00eau v\u00e0o c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng quan tr\u1ecdng, c\u01a1 quan ch\u00ednh ph\u1ee7 ho\u1eb7c t\u1ed5 ch\u1ee9c l\u1edbn nh\u1eb1m g\u00e2y ra s\u1ef1 gi\u00e1n \u0111o\u1ea1n l\u1edbn.<\/li>\n<\/ul>\n<h3>V\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p:<\/h3>\n<ul>\n<li>\n<p><strong>X\u00e1c th\u1ef1c ngu\u1ed3n IP:<\/strong> Vi\u1ec7c tri\u1ec3n khai x\u00e1c th\u1ef1c IP ngu\u1ed3n \u1edf bi\u00ean m\u1ea1ng c\u00f3 th\u1ec3 ng\u0103n ch\u1eb7n vi\u1ec7c gi\u1ea3 m\u1ea1o \u0111\u1ecba ch\u1ec9 IP, g\u00e2y kh\u00f3 kh\u0103n cho k\u1ebb t\u1ea5n c\u00f4ng trong vi\u1ec7c s\u1eed d\u1ee5ng IP c\u1ee7a n\u1ea1n nh\u00e2n.<\/p>\n<\/li>\n<li>\n<p><strong>V\u00f4 hi\u1ec7u h\u00f3a ch\u01b0\u01a1ng tr\u00ecnh ph\u00e1t s\u00f3ng h\u01b0\u1edbng IP:<\/strong> Vi\u1ec7c v\u00f4 hi\u1ec7u h\u00f3a c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh ph\u00e1t s\u00f3ng h\u01b0\u1edbng IP tr\u00ean b\u1ed9 \u0111\u1ecbnh tuy\u1ebfn v\u00e0 chuy\u1ec3n m\u1ea1ch c\u00f3 th\u1ec3 gi\u00fap gi\u1ea3m thi\u1ec3u t\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng Smurf.<\/p>\n<\/li>\n<li>\n<p><strong>L\u1ecdc x\u00e2m nh\u1eadp:<\/strong> Vi\u1ec7c s\u1eed d\u1ee5ng t\u00ednh n\u0103ng l\u1ecdc x\u00e2m nh\u1eadp tr\u00ean c\u00e1c thi\u1ebft b\u1ecb m\u1ea1ng \u0111\u1ec3 ch\u1eb7n l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp c\u00f3 \u0111\u1ecba ch\u1ec9 ngu\u1ed3n kh\u00f4ng xu\u1ea5t hi\u1ec7n tr\u00ean m\u1ea1ng c\u0169ng c\u00f3 th\u1ec3 c\u00f3 hi\u1ec7u qu\u1ea3.<\/p>\n<\/li>\n<li>\n<p><strong>Gi\u1edbi h\u1ea1n t\u1ef7 l\u1ec7:<\/strong> Vi\u1ec7c thi\u1ebft l\u1eadp gi\u1edbi h\u1ea1n t\u1ed1c \u0111\u1ed9 \u0111\u1ed1i v\u1edbi l\u01b0u l\u01b0\u1ee3ng ICMP c\u00f3 th\u1ec3 gi\u00fap gi\u1ea3m thi\u1ec3u t\u00e1c \u0111\u1ed9ng khu\u1ebfch \u0111\u1ea1i c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng.<\/p>\n<\/li>\n<\/ul>\n<h2>C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 so s\u00e1nh kh\u00e1c v\u1edbi c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1<\/h2>\n<p>H\u00e3y so s\u00e1nh c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng Smurf v\u1edbi c\u00e1c ki\u1ec3u t\u1ea5n c\u00f4ng DDoS t\u01b0\u01a1ng t\u1ef1:<\/p>\n<table>\n<thead>\n<tr>\n<th>Ki\u1ec3u t\u1ea5n c\u00f4ng<\/th>\n<th>Giao th\u1ee9c<\/th>\n<th>H\u1ec7 s\u1ed1 khu\u1ebfch \u0111\u1ea1i<\/th>\n<th>Gi\u1ea3 m\u1ea1o IP<\/th>\n<th>M\u1ee5c ti\u00eau<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>T\u1ea5n c\u00f4ng Smurf<\/td>\n<td>ICMP\/UDP<\/td>\n<td>Cao<\/td>\n<td>\u0110\u00fang<\/td>\n<td>IP ph\u00e1t s\u00f3ng<\/td>\n<\/tr>\n<tr>\n<td>Cu\u1ed9c t\u1ea5n c\u00f4ng l\u0169 l\u1ee5t SYN<\/td>\n<td>TCP<\/td>\n<td>Th\u1ea5p-Trung b\u00ecnh<\/td>\n<td>KH\u00d4NG<\/td>\n<td>C\u1ed5ng d\u1ecbch v\u1ee5<\/td>\n<\/tr>\n<tr>\n<td>Khu\u1ebfch \u0111\u1ea1i DNS<\/td>\n<td>UDP<\/td>\n<td>Cao<\/td>\n<td>\u0110\u00fang<\/td>\n<td>B\u1ed9 \u0111\u1ec7 quy DNS<\/td>\n<\/tr>\n<tr>\n<td>Khu\u1ebfch \u0111\u1ea1i NTP<\/td>\n<td>UDP<\/td>\n<td>Cao<\/td>\n<td>\u0110\u00fang<\/td>\n<td>M\u00e1y ch\u1ee7 NTP<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Vi\u1ec5n c\u1ea3nh v\u00e0 c\u00f4ng ngh\u1ec7 t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn cu\u1ed9c t\u1ea5n c\u00f4ng c\u1ee7a Smurf<\/h2>\n<p>Khi c\u00f4ng ngh\u1ec7 ph\u00e1t tri\u1ec3n, qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng v\u00e0 chuy\u00ean gia an ninh m\u1ea1ng s\u1ebd ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n c\u00e1c k\u1ef9 thu\u1eadt gi\u1ea3m nh\u1eb9 ti\u00ean ti\u1ebfn \u0111\u1ec3 ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng c\u1ee7a Smurf v\u00e0 c\u00e1c m\u1ed1i \u0111e d\u1ecda DDoS kh\u00e1c. C\u00e1c thu\u1eadt to\u00e1n tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o v\u00e0 h\u1ecdc m\u00e1y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u1eadn d\u1ee5ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u00e0 \u1ee9ng ph\u00f3 v\u1edbi c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng nh\u01b0 v\u1eady trong th\u1eddi gian th\u1ef1c. Ngo\u00e0i ra, c\u00e1c c\u00f4ng c\u1ee5 gi\u00e1m s\u00e1t v\u00e0 ph\u00e2n t\u00edch n\u00e2ng cao s\u1ebd \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh v\u00e0 gi\u1ea3m thi\u1ec3u c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng \u0111ang di\u1ec5n ra.<\/p>\n<h2>C\u00e1ch m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft v\u1edbi cu\u1ed9c t\u1ea5n c\u00f4ng Smurf<\/h2>\n<p>M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 v\u1eeba l\u00e0 m\u1ee5c ti\u00eau v\u1eeba l\u00e0 ph\u01b0\u01a1ng ti\u1ec7n \u0111\u1ec3 gi\u1ea3m thi\u1ec3u c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng c\u1ee7a Smurf:<\/p>\n<ol>\n<li>\n<p><strong>Proxy l\u00e0m m\u1ee5c ti\u00eau:<\/strong> N\u1ebfu m\u00e1y ch\u1ee7 proxy l\u00e0 n\u1ea1n nh\u00e2n c\u1ee7a cu\u1ed9c t\u1ea5n c\u00f4ng Smurf, cu\u1ed9c t\u1ea5n c\u00f4ng c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn gi\u00e1n \u0111o\u1ea1n d\u1ecbch v\u1ee5, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn nh\u1eefng ng\u01b0\u1eddi d\u00f9ng d\u1ef1a v\u00e0o proxy \u0111\u1ec3 truy c\u1eadp internet.<\/p>\n<\/li>\n<li>\n<p><strong>Proxy nh\u01b0 m\u1ed9t c\u00f4ng c\u1ee5 gi\u1ea3m thi\u1ec3u:<\/strong> M\u1eb7t kh\u00e1c, m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t h\u00e0ng r\u00e0o b\u1ea3o v\u1ec7 gi\u1eefa nh\u1eefng k\u1ebb t\u1ea5n c\u00f4ng v\u00e0 m\u1ea1ng m\u1ee5c ti\u00eau. C\u00e1c nh\u00e0 cung c\u1ea5p proxy, nh\u01b0 OneProxy, c\u00f3 th\u1ec3 cung c\u1ea5p d\u1ecbch v\u1ee5 b\u1ea3o v\u1ec7 DDoS, l\u1ecdc l\u01b0u l\u01b0\u1ee3ng \u0111\u1ed9c h\u1ea1i tr\u01b0\u1edbc khi n\u00f3 \u0111\u1ebfn \u0111\u01b0\u1ee3c m\u1ee5c ti\u00eau.<\/p>\n<\/li>\n<\/ol>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.caida.org\/catalog\/datasets\/smurf\/sar\/\" target=\"_new\" rel=\"noopener nofollow\">C\u01a1 quan \u0111\u0103ng k\u00fd b\u1ed9 khu\u1ebfch \u0111\u1ea1i Smurf (SAR)<\/a><\/li>\n<li><a href=\"https:\/\/www.watchguard.com\/wgrd-resource-center\/security-vulnerability-alerts\/icmp-attacks-smurf-attack\" target=\"_new\" rel=\"noopener nofollow\">T\u1ea5n c\u00f4ng ICMP: Cu\u1ed9c t\u1ea5n c\u00f4ng Smurf<\/a><\/li>\n<li><a href=\"https:\/\/www.cloudflare.com\/learning\/ddos\/glossary\/smurf-attack\/\" target=\"_new\" rel=\"noopener nofollow\">Hi\u1ec3u c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS<\/a><\/li>\n<\/ul>\n<p>T\u00f3m l\u1ea1i, cu\u1ed9c t\u1ea5n c\u00f4ng Smurf v\u1eabn l\u00e0 m\u1ed1i \u0111e d\u1ecda \u0111\u00e1ng k\u1ec3 \u0111\u1ed1i v\u1edbi c\u00e1c m\u1ea1ng, nh\u01b0ng v\u1edbi nh\u1eefng ti\u1ebfn b\u1ed9 li\u00ean t\u1ee5c trong c\u00f4ng ngh\u1ec7 an ninh m\u1ea1ng v\u00e0 gi\u1ea3m thi\u1ec3u DDoS, c\u00f3 th\u1ec3 gi\u1ea3m thi\u1ec3u t\u00e1c \u0111\u1ed9ng c\u1ee7a c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng nh\u01b0 v\u1eady. L\u00e0 nh\u00e0 cung c\u1ea5p m\u00e1y ch\u1ee7 proxy uy t\u00edn, OneProxy \u01b0u ti\u00ean t\u00ednh b\u1ea3o m\u1eadt v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a d\u1ecbch v\u1ee5, n\u1ed7 l\u1ef1c b\u1ea3o v\u1ec7 kh\u00e1ch h\u00e0ng kh\u1ecfi nhi\u1ec1u m\u1ed1i \u0111e d\u1ecda kh\u00e1c nhau, bao g\u1ed3m c\u1ea3 c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng c\u1ee7a Smurf, \u0111\u1ed3ng th\u1eddi \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng truy c\u1eadp Internet tr\u01a1n tru v\u00e0 kh\u00f4ng b\u1ecb gi\u00e1n \u0111o\u1ea1n.<\/p>","protected":false},"featured_media":479039,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-479038","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Smurf Attack: A Comprehensive Overview<\/mark>","faq_items":[{"question":"What is a Smurf attack?","answer":"<p>A Smurf attack is a type of Distributed Denial of Service (DDoS) attack that floods a target network with a large volume of Internet Control Message Protocol (ICMP) packets. These packets are broadcasted to intermediary networks, which then respond, overwhelming the target's resources and causing a disruption of service.<\/p>"},{"question":"Who discovered the Smurf attack, and when was it first mentioned?","answer":"<p>The Smurf attack was first documented by Michal Zalewski in 1997. It gained notoriety in the late 1990s and early 2000s when it was used to disrupt several high-profile websites and services.<\/p>"},{"question":"How does a Smurf attack work?","answer":"<p>In a Smurf attack, the attacker spoofs the victim's IP address and sends ICMP echo requests to broadcast addresses on intermediary networks. These networks, believing the requests are legitimate, broadcast the ICMP echo requests to all devices, generating a flood of ICMP echo replies that inundate the victim's network.<\/p>"},{"question":"What are the key features of a Smurf attack?","answer":"<p>The key features of a Smurf attack include amplification, IP spoofing, and exploiting the vulnerability of the ICMP protocol. The attack leverages these elements to cause significant disruption to the target network.<\/p>"},{"question":"What types of Smurf attacks exist?","answer":"<p>There are two main types of Smurf attacks:<\/p><ol><li>Traditional Smurf Attack: This type directly spoofs the victim's IP address and broadcasts ICMP echo requests to intermediary networks.<\/li><li>Fraggle Attack: Similar to the traditional Smurf attack, but instead of ICMP, the attackers use the User Datagram Protocol (UDP) targeting port 7 (echo) and port 19 (chargen).<\/li><\/ol>"},{"question":"How can Smurf attacks be mitigated?","answer":"<p>Smurf attacks can be mitigated through several measures, such as implementing IP source validation, disabling IP-directed broadcasts, using ingress filtering, and setting up rate limits on ICMP traffic.<\/p>"},{"question":"How can proxy servers help in countering Smurf attacks?","answer":"<p>Proxy servers can act as a protective barrier against Smurf attacks. Reputable proxy server providers, like OneProxy, offer DDoS protection services that filter out malicious traffic before it reaches the target network, ensuring uninterrupted internet access for users.<\/p>"},{"question":"Are there any future technologies to combat Smurf attacks?","answer":"<p>As technology evolves, cybersecurity professionals will continue to develop advanced mitigation techniques using artificial intelligence, machine learning, and enhanced monitoring tools to identify and respond to Smurf attacks in real-time.<\/p>"},{"question":"Where can I find more information about Smurf attacks?","answer":"<p>For more in-depth information about Smurf attacks, you can refer to the following resources:<\/p><ul><li><a href=\"https:\/\/www.caida.org\/catalog\/datasets\/smurf\/sar\/\" target=\"_new\">The Smurf Amplifier Registry (SAR)<\/a><\/li><li><a href=\"https:\/\/www.watchguard.com\/wgrd-resource-center\/security-vulnerability-alerts\/icmp-attacks-smurf-attack\" target=\"_new\">ICMP Attacks: The Smurf Attack<\/a><\/li><li><a href=\"https:\/\/www.cloudflare.com\/learning\/ddos\/glossary\/smurf-attack\/\" target=\"_new\">Understanding DDoS Attacks<\/a><\/li><\/ul>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/479038","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\/479038\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/479039"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=479038"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}