{"id":479448,"date":"2023-08-09T10:40:25","date_gmt":"2023-08-09T10:40:25","guid":{"rendered":""},"modified":"2023-09-05T11:18:50","modified_gmt":"2023-09-05T11:18:50","slug":"unknown-host","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/unknown-host\/","title":{"rendered":"Unknown host"},"content":{"rendered":"<h2>Gi\u1edbi thi\u1ec7u v\u1ec1 M\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh<\/h2>\n<p>M\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh l\u00e0 m\u1ed9t thu\u1eadt ng\u1eef \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong b\u1ed1i c\u1ea3nh m\u00e1y ch\u1ee7 proxy v\u00e0 m\u1ea1ng internet. N\u00f3 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn t\u00ecnh hu\u1ed1ng trong \u0111\u00f3 m\u1ed9t h\u1ec7 th\u1ed1ng, \u0111i\u1ec3n h\u00ecnh l\u00e0 tr\u00ecnh duy\u1ec7t web, kh\u00f4ng th\u1ec3 ph\u00e2n gi\u1ea3i \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u1ed9t t\u00ean mi\u1ec1n c\u1ee5 th\u1ec3. Khi c\u1ed1 g\u1eafng truy c\u1eadp m\u1ed9t trang web, tr\u00ecnh duy\u1ec7t s\u1ebd truy v\u1ea5n m\u00e1y ch\u1ee7 DNS (H\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n) \u0111\u1ec3 t\u00ecm \u0111\u1ecba ch\u1ec9 IP \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi t\u00ean mi\u1ec1n. N\u1ebfu m\u00e1y ch\u1ee7 DNS kh\u00f4ng th\u1ec3 t\u00ecm th\u1ea5y \u0111\u1ecba ch\u1ec9 IP cho mi\u1ec1n \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u, n\u00f3 s\u1ebd ph\u1ea3n h\u1ed3i b\u1eb1ng th\u00f4ng b\u00e1o l\u1ed7i \u201cM\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh\u201d, cho bi\u1ebft r\u1eb1ng mi\u1ec1n kh\u00f4ng \u0111\u01b0\u1ee3c nh\u1eadn d\u1ea1ng tr\u00ean m\u1ea1ng.<\/p>\n<h2>L\u1ecbch s\u1eed v\u1ec1 ngu\u1ed3n g\u1ed1c c\u1ee7a v\u1eadt ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh v\u00e0 s\u1ef1 \u0111\u1ec1 c\u1eadp \u0111\u1ea7u ti\u00ean v\u1ec1 n\u00f3<\/h2>\n<p>L\u1ecbch s\u1eed c\u1ee7a thu\u1eadt ng\u1eef \u201cM\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh\u201d c\u00f3 th\u1ec3 b\u1eaft ngu\u1ed3n t\u1eeb nh\u1eefng ng\u00e0y \u0111\u1ea7u c\u1ee7a Internet khi DNS \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u v\u00e0o n\u0103m 1983. Khi Internet m\u1edf r\u1ed9ng nhanh ch\u00f3ng, nhu c\u1ea7u v\u1ec1 m\u1ed9t h\u1ec7 th\u1ed1ng hi\u1ec7u qu\u1ea3 v\u00e0 c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng \u0111\u1ec3 d\u1ecbch t\u00ean mi\u1ec1n th\u00e0nh \u0111\u1ecba ch\u1ec9 IP tr\u1edf n\u00ean r\u00f5 r\u00e0ng. . DNS \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 gi\u1ea3i quy\u1ebft nhu c\u1ea7u n\u00e0y v\u00e0 t\u1eeb \u0111\u00f3 \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t kh\u00eda c\u1ea1nh c\u01a1 b\u1ea3n trong c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Internet.<\/p>\n<p>L\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn thu\u1eadt ng\u1eef \u201cM\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh\u201d c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong c\u00e1c di\u1ec5n \u0111\u00e0n internet v\u00e0 c\u00e1c cu\u1ed9c th\u1ea3o lu\u1eadn k\u1ef9 thu\u1eadt \u0111\u1ea7u ti\u00ean v\u00e0o kho\u1ea3ng cu\u1ed1i nh\u1eefng n\u0103m 1980 v\u00e0 \u0111\u1ea7u nh\u1eefng n\u0103m 1990. Ng\u01b0\u1eddi d\u00f9ng g\u1eb7p ph\u1ea3i l\u1ed7i n\u00e0y \u0111ang t\u00ecm ki\u1ebfm gi\u1ea3i ph\u00e1p \u0111\u1ec3 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 v\u00e0 ti\u1ebfp t\u1ee5c truy c\u1eadp c\u00e1c trang web mong mu\u1ed1n.<\/p>\n<h2>Th\u00f4ng tin chi ti\u1ebft v\u1ec1 M\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh<\/h2>\n<p>M\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh l\u00e0 l\u1ed7i m\u00e0 ng\u01b0\u1eddi d\u00f9ng internet g\u1eb7p ph\u1ea3i khi c\u1ed1 g\u1eafng truy c\u1eadp m\u1ed9t trang web nh\u01b0ng h\u1ec7 th\u1ed1ng c\u1ee7a h\u1ecd kh\u00f4ng ph\u00e2n gi\u1ea3i \u0111\u01b0\u1ee3c t\u00ean mi\u1ec1n th\u00e0nh \u0111\u1ecba ch\u1ec9 IP. Th\u00f4ng b\u00e1o l\u1ed7i th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng \u201cM\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh\u201d ho\u1eb7c \u201cKh\u00f4ng t\u00ecm th\u1ea5y m\u00e1y ch\u1ee7\u201d trong c\u00e1c tr\u00ecnh duy\u1ec7t web ph\u1ed5 bi\u1ebfn nh\u01b0 Google Chrome, Mozilla Firefox v\u00e0 Microsoft Edge.<\/p>\n<p>L\u1ed7i n\u00e0y c\u00f3 th\u1ec3 x\u1ea3y ra do nhi\u1ec1u l\u00fd do kh\u00e1c nhau, m\u1ed9t s\u1ed1 trong \u0111\u00f3 bao g\u1ed3m:<\/p>\n<ul>\n<li>L\u1ed7i \u0111\u00e1nh m\u00e1y trong URL<\/li>\n<li>S\u1ef1 c\u1ed1 m\u00e1y ch\u1ee7 DNS<\/li>\n<li>T\u00ean mi\u1ec1n h\u1ebft h\u1ea1n ho\u1eb7c c\u1ea5u h\u00ecnh sai<\/li>\n<li>S\u1ef1 c\u1ed1 k\u1ebft n\u1ed1i<\/li>\n<li>H\u1ea1n ch\u1ebf t\u01b0\u1eddng l\u1eeda<\/li>\n<\/ul>\n<h2>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a m\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh: N\u00f3 ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o<\/h2>\n<p>\u0110\u1ec3 hi\u1ec3u l\u1ed7i \u201cUnknown Host\u201d ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o, \u0111i\u1ec1u c\u1ea7n thi\u1ebft l\u00e0 ph\u1ea3i n\u1eafm r\u00f5 ch\u1ee9c n\u0103ng c\u1ee7a H\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n (DNS). DNS l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng ph\u00e2n t\u00e1n c\u00f3 ch\u1ee9c n\u0103ng d\u1ecbch c\u00e1c t\u00ean mi\u1ec1n m\u00e0 con ng\u01b0\u1eddi c\u00f3 th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c th\u00e0nh \u0111\u1ecba ch\u1ec9 IP m\u00e0 m\u00e1y c\u00f3 th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c. N\u00f3 bao g\u1ed3m m\u1ed9t s\u1ed1 th\u00e0nh ph\u1ea7n, bao g\u1ed3m:<\/p>\n<ul>\n<li>Tr\u00ecnh ph\u00e2n gi\u1ea3i DNS: \u0110\u00e2y l\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n ph\u00eda m\u00e1y kh\u00e1ch kh\u1edfi t\u1ea1o c\u00e1c truy v\u1ea5n DNS v\u00e0 li\u00ean l\u1ea1c v\u1edbi c\u00e1c m\u00e1y ch\u1ee7 DNS \u0111\u1ec3 ph\u00e2n gi\u1ea3i t\u00ean mi\u1ec1n.<\/li>\n<li>M\u00e1y ch\u1ee7 DNS: \u0110\u00e2y l\u00e0 c\u00e1c m\u00e1y ch\u1ee7 c\u00f3 th\u1ea9m quy\u1ec1n ch\u1ecbu tr\u00e1ch nhi\u1ec7m l\u01b0u tr\u1eef v\u00e0 cung c\u1ea5p b\u1ea3n ghi DNS cho c\u00e1c t\u00ean mi\u1ec1n c\u1ee5 th\u1ec3.<\/li>\n<\/ul>\n<p>Khi ng\u01b0\u1eddi d\u00f9ng nh\u1eadp URL v\u00e0o tr\u00ecnh duy\u1ec7t web c\u1ee7a h\u1ecd, tr\u00ecnh ph\u00e2n gi\u1ea3i DNS trong h\u1ec7 th\u1ed1ng c\u1ee7a h\u1ecd s\u1ebd g\u1eedi truy v\u1ea5n \u0111\u1ebfn m\u00e1y ch\u1ee7 DNS \u0111\u1ec3 l\u1ea5y \u0111\u1ecba ch\u1ec9 IP \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi t\u00ean mi\u1ec1n. N\u1ebfu m\u00e1y ch\u1ee7 DNS kh\u00f4ng th\u1ec3 t\u00ecm th\u1ea5y \u0111\u1ecba ch\u1ec9 IP ph\u00f9 h\u1ee3p, n\u00f3 s\u1ebd ph\u1ea3n h\u1ed3i v\u1edbi l\u1ed7i \u201cM\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh\u201d, cho bi\u1ebft t\u00ean mi\u1ec1n ch\u01b0a \u0111\u01b0\u1ee3c \u0111\u0103ng k\u00fd ho\u1eb7c kh\u00f4ng th\u1ec3 gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c.<\/p>\n<h2>Ph\u00e2n t\u00edch c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a M\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh<\/h2>\n<p>C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a l\u1ed7i \u201cM\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh\u201d bao g\u1ed3m:<\/p>\n<ol>\n<li><strong>X\u00e1c \u0111\u1ecbnh l\u1ed7i<\/strong>: L\u1ed7i cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng v\u00e0 qu\u1ea3n tr\u1ecb vi\u00ean x\u00e1c \u0111\u1ecbnh k\u1ecbp th\u1eddi c\u00e1c v\u1ea5n \u0111\u1ec1 ti\u1ec1m \u1ea9n v\u1edbi vi\u1ec7c ph\u00e2n gi\u1ea3i t\u00ean mi\u1ec1n.<\/li>\n<li><strong>Th\u00f4ng tin chu\u1ea9n \u0111o\u00e1n<\/strong>: Th\u00f4ng b\u00e1o l\u1ed7i th\u01b0\u1eddng bao g\u1ed3m c\u00e1c chi ti\u1ebft b\u1ed5 sung, ch\u1eb3ng h\u1ea1n nh\u01b0 t\u00ean mi\u1ec1n g\u00e2y ra s\u1ef1 c\u1ed1, h\u1ed7 tr\u1ee3 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1.<\/li>\n<\/ol>\n<h2>C\u00e1c lo\u1ea1i m\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh v\u00e0 m\u00f4 t\u1ea3 c\u1ee7a ch\u00fang<\/h2>\n<table>\n<thead>\n<tr>\n<th>Ki\u1ec3u<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>L\u1ed7i \u0111\u00e1nh m\u00e1y<\/td>\n<td>\u0110i\u1ec1u n\u00e0y x\u1ea3y ra khi ng\u01b0\u1eddi d\u00f9ng g\u00f5 nh\u1ea7m t\u00ean mi\u1ec1n trong URL, d\u1eabn \u0111\u1ebfn truy v\u1ea5n DNS kh\u00f4ng th\u00e0nh c\u00f4ng.<\/td>\n<\/tr>\n<tr>\n<td>S\u1ef1 c\u1ed1 m\u00e1y ch\u1ee7 DNS<\/td>\n<td>N\u1ebfu b\u1ea3n th\u00e2n m\u00e1y ch\u1ee7 DNS \u0111ang g\u1eb7p s\u1ef1 c\u1ed1, n\u00f3 c\u00f3 th\u1ec3 kh\u00f4ng ph\u1ea3n h\u1ed3i c\u00e1c truy v\u1ea5n DNS, d\u1eabn \u0111\u1ebfn l\u1ed7i \u201cM\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh\u201d.<\/td>\n<\/tr>\n<tr>\n<td>C\u1ea5u h\u00ecnh sai t\u00ean mi\u1ec1n<\/td>\n<td>B\u1ea3n ghi DNS \u0111\u01b0\u1ee3c \u0111\u1ecbnh c\u1ea5u h\u00ecnh kh\u00f4ng ch\u00ednh x\u00e1c cho t\u00ean mi\u1ec1n c\u00f3 th\u1ec3 ng\u0103n c\u1ea3n \u0111\u1ed9 ph\u00e2n gi\u1ea3i th\u00edch h\u1ee3p, d\u1eabn \u0111\u1ebfn th\u00f4ng b\u00e1o l\u1ed7i.<\/td>\n<\/tr>\n<tr>\n<td>S\u1ef1 c\u1ed1 k\u1ebft n\u1ed1i<\/td>\n<td>C\u00e1c s\u1ef1 c\u1ed1 v\u1edbi k\u1ebft n\u1ed1i Internet ho\u1eb7c m\u1ea1ng c\u1ee7a ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 c\u1ea3n tr\u1edf vi\u1ec7c li\u00ean l\u1ea1c v\u1edbi m\u00e1y ch\u1ee7 DNS, g\u00e2y ra l\u1ed7i.<\/td>\n<\/tr>\n<tr>\n<td>H\u1ea1n ch\u1ebf c\u1ee7a t\u01b0\u1eddng l\u1eeda<\/td>\n<td>\u0110\u00f4i khi, t\u01b0\u1eddng l\u1eeda ho\u1eb7c c\u00e0i \u0111\u1eb7t b\u1ea3o m\u1eadt c\u00f3 th\u1ec3 ch\u1eb7n c\u00e1c y\u00eau c\u1ea7u DNS, ng\u0103n ch\u1eb7n vi\u1ec7c ph\u00e2n gi\u1ea3i t\u00ean mi\u1ec1n v\u00e0 d\u1eabn \u0111\u1ebfn l\u1ed7i.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1c c\u00e1ch s\u1eed d\u1ee5ng m\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh, s\u1ef1 c\u1ed1 v\u00e0 gi\u1ea3i ph\u00e1p<\/h2>\n<h3>S\u1eed d\u1ee5ng m\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh<\/h3>\n<p>M\u1eb7c d\u00f9 \u201cM\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh\u201d l\u00e0 m\u1ed9t l\u1ed7i ch\u1ee9 kh\u00f4ng ph\u1ea3i m\u1ed9t c\u00f4ng c\u1ee5 hay d\u1ecbch v\u1ee5 nh\u01b0ng n\u00f3 \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c th\u00f4ng b\u00e1o cho ng\u01b0\u1eddi d\u00f9ng v\u00e0 qu\u1ea3n tr\u1ecb vi\u00ean v\u1ec1 c\u00e1c s\u1ef1 c\u1ed1 ti\u1ec1m \u1ea9n li\u00ean quan \u0111\u1ebfn DNS. Khi g\u1eb7p ph\u1ea3i l\u1ed7i n\u00e0y, ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh c\u00e1c v\u1ea5n \u0111\u1ec1 trong qu\u00e1 tr\u00ecnh ph\u00e2n gi\u1ea3i t\u00ean mi\u1ec1n v\u00e0 th\u1ef1c hi\u1ec7n c\u00e1c b\u01b0\u1edbc th\u00edch h\u1ee3p \u0111\u1ec3 gi\u1ea3i quy\u1ebft ch\u00fang.<\/p>\n<h3>V\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p<\/h3>\n<ol>\n<li><strong>L\u1ed7i \u0111\u00e1nh m\u00e1y<\/strong>: Ki\u1ec3m tra k\u1ef9 URL xem c\u00f3 l\u1ed7i ch\u00ednh t\u1ea3 ho\u1eb7c c\u00fa ph\u00e1p n\u00e0o kh\u00f4ng. S\u1eeda l\u1ed7i ch\u00ednh t\u1ea3 s\u1ebd gi\u1ea3i quy\u1ebft \u0111\u01b0\u1ee3c v\u1ea5n \u0111\u1ec1.<\/li>\n<li><strong>S\u1ef1 c\u1ed1 m\u00e1y ch\u1ee7 DNS<\/strong>: X\u00e1c minh r\u1eb1ng m\u00e1y ch\u1ee7 DNS \u0111ang ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u00fang c\u00e1ch. N\u1ebfu \u0111\u00f3 l\u00e0 m\u00e1y ch\u1ee7 DNS c\u00f4ng c\u1ed9ng, h\u00e3y c\u00e2n nh\u1eafc t\u1ea1m th\u1eddi chuy\u1ec3n sang m\u1ed9t m\u00e1y ch\u1ee7 DNS kh\u00e1c.<\/li>\n<li><strong>C\u1ea5u h\u00ecnh sai t\u00ean mi\u1ec1n<\/strong>: Xem l\u1ea1i b\u1ea3n ghi DNS cho t\u00ean mi\u1ec1n v\u00e0 \u0111\u1ea3m b\u1ea3o ch\u00fang ch\u00ednh x\u00e1c. N\u1ebfu c\u1ea7n, h\u00e3y li\u00ean h\u1ec7 v\u1edbi nh\u00e0 \u0111\u0103ng k\u00fd t\u00ean mi\u1ec1n ho\u1eb7c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef \u0111\u1ec3 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3.<\/li>\n<li><strong>S\u1ef1 c\u1ed1 k\u1ebft n\u1ed1i<\/strong>: Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 k\u1ebft n\u1ed1i internet v\u00e0 c\u00e0i \u0111\u1eb7t m\u1ea1ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o li\u00ean l\u1ea1c th\u00edch h\u1ee3p v\u1edbi m\u00e1y ch\u1ee7 DNS.<\/li>\n<li><strong>H\u1ea1n ch\u1ebf c\u1ee7a t\u01b0\u1eddng l\u1eeda<\/strong>: Ki\u1ec3m tra c\u00e0i \u0111\u1eb7t t\u01b0\u1eddng l\u1eeda v\u00e0 \u0111\u1ea3m b\u1ea3o c\u00e1c y\u00eau c\u1ea7u DNS kh\u00f4ng b\u1ecb ch\u1eb7n. \u0110i\u1ec1u ch\u1ec9nh c\u00e1c quy t\u1eafc t\u01b0\u1eddng l\u1eeda n\u1ebfu c\u1ea7n thi\u1ebft.<\/li>\n<\/ol>\n<h2>C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 so s\u00e1nh v\u1edbi c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1<\/h2>\n<table>\n<thead>\n<tr>\n<th>Thu\u1eadt ng\u1eef<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Unknown host<\/td>\n<td>L\u1ed7i cho bi\u1ebft m\u00e1y ch\u1ee7 DNS kh\u00f4ng th\u1ec3 ph\u00e2n gi\u1ea3i \u0111\u1ecba ch\u1ec9 IP c\u1ee7a t\u00ean mi\u1ec1n, ng\u0103n c\u1ea3n vi\u1ec7c truy c\u1eadp v\u00e0o trang web mong mu\u1ed1n.<\/td>\n<\/tr>\n<tr>\n<td>L\u1ed7i tra c\u1ee9u DNS<\/td>\n<td>M\u1ed9t thu\u1eadt ng\u1eef kh\u00e1c cho l\u1ed7i \u201cUnknown Host\u201d, nh\u1ea5n m\u1ea1nh \u0111\u1ebfn s\u1ef1 th\u1ea5t b\u1ea1i c\u1ee7a qu\u00e1 tr\u00ecnh tra c\u1ee9u DNS.<\/td>\n<\/tr>\n<tr>\n<td>404 kh\u00f4ng t\u00ecm th\u1ea5y<\/td>\n<td>\u0110\u00e3 x\u1ea3y ra l\u1ed7i kh\u00e1c khi truy c\u1eadp m\u1ed9t trang web, cho bi\u1ebft m\u00e1y ch\u1ee7 kh\u00f4ng th\u1ec3 t\u00ecm th\u1ea5y trang \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u.<\/td>\n<\/tr>\n<tr>\n<td>H\u1ebft th\u1eddi gian k\u1ebft n\u1ed1i<\/td>\n<td>L\u1ed7i x\u1ea3y ra khi m\u00e1y ch\u1ee7 kh\u00f4ng ph\u1ea3n h\u1ed3i trong m\u1ed9t th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh trong khi c\u1ed1 g\u1eafng thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ee7a t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn m\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh<\/h2>\n<p>Khi c\u00f4ng ngh\u1ec7 ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n, t\u1ef7 l\u1ec7 x\u1ea3y ra l\u1ed7i \u201cM\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh\u201d c\u00f3 th\u1ec3 gi\u1ea3m do nh\u1eefng ti\u1ebfn b\u1ed9 trong c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng DNS, \u0111\u1ed9 tin c\u1eady c\u1ee7a m\u00e1y ch\u1ee7 DNS t\u0103ng l\u00ean v\u00e0 c\u01a1 ch\u1ebf x\u1eed l\u00fd l\u1ed7i \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n trong tr\u00ecnh duy\u1ec7t web. Ngo\u00e0i ra, vi\u1ec7c \u00e1p d\u1ee5ng r\u1ed9ng r\u00e3i IPv6 c\u00f3 th\u1ec3 mang l\u1ea1i nh\u1eefng thay \u0111\u1ed5i v\u1ec1 c\u00e1ch th\u1ef1c hi\u1ec7n \u0111\u1ed9 ph\u00e2n gi\u1ea3i DNS, c\u00f3 kh\u1ea3 n\u0103ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng g\u1eb7p ph\u1ea3i l\u1ed7i \u201cM\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh\u201d.<\/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 m\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh<\/h2>\n<p>M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 \u0111\u00f3ng vai tr\u00f2 gi\u1ea3i quy\u1ebft l\u1ed7i &quot;M\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh&quot; b\u1eb1ng c\u00e1ch \u0111\u00f3ng vai tr\u00f2 trung gian gi\u1eefa m\u00e1y kh\u00e1ch v\u00e0 m\u00e1y ch\u1ee7 DNS. Khi ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp m\u1ed9t trang web th\u00f4ng qua m\u00e1y ch\u1ee7 proxy, vi\u1ec7c ph\u00e2n gi\u1ea3i DNS \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1edfi proxy ch\u1ee9 kh\u00f4ng ph\u1ea3i h\u1ec7 th\u1ed1ng c\u1ee7a kh\u00e1ch h\u00e0ng. N\u1ebfu m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 ph\u00e2n gi\u1ea3i mi\u1ec1n th\u00e0nh c\u00f4ng, n\u00f3 s\u1ebd truy xu\u1ea5t n\u1ed9i dung t\u1eeb m\u00e1y ch\u1ee7 web v\u00e0 chuy\u1ec3n ti\u1ebfp \u0111\u1ebfn ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<p>S\u1eed d\u1ee5ng m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 gi\u00fap b\u1ecf qua c\u00e1c s\u1ef1 c\u1ed1 li\u00ean quan \u0111\u1ebfn DNS tr\u00ean h\u1ec7 th\u1ed1ng c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, \u0111\u1eb7c bi\u1ec7t trong tr\u01b0\u1eddng h\u1ee3p m\u00e1y ch\u1ee7 DNS c\u00f3 th\u1ec3 t\u1ea1m th\u1eddi kh\u00f4ng kh\u1ea3 d\u1ee5ng ho\u1eb7c b\u1ecb ch\u1eb7n. Tuy nhi\u00ean, \u0111i\u1ec1u quan tr\u1ecdng c\u1ea7n l\u01b0u \u00fd l\u00e0 b\u1ea3n th\u00e2n m\u00e1y ch\u1ee7 proxy \u0111\u00f4i khi c\u00f3 th\u1ec3 g\u1eb7p ph\u1ea3i l\u1ed7i \u201cM\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh\u201d n\u1ebfu c\u1ea5u h\u00ecnh DNS c\u1ee7a ch\u00fang b\u1ecb l\u1ed7i ho\u1eb7c n\u1ebfu mi\u1ec1n \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u b\u1ecb ch\u1eb7n \u1edf c\u1ea5p proxy.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 l\u1ed7i \u201cM\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh\u201d, DNS v\u00e0 m\u00e1y ch\u1ee7 proxy, b\u1ea1n c\u00f3 th\u1ec3 kh\u00e1m ph\u00e1 c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n<ol>\n<li><a href=\"https:\/\/www.cloudflare.com\/learning\/dns\/what-is-dns\/\" target=\"_new\" rel=\"noopener nofollow\">Gi\u1ea3i th\u00edch v\u1ec1 DNS: H\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o<\/a><\/li>\n<li><a href=\"https:\/\/www.cloudflare.com\/learning\/cdn\/glossary\/reverse-proxy\/\" target=\"_new\" rel=\"noopener nofollow\">M\u00e1y ch\u1ee7 proxy: Ch\u00fang l\u00e0 g\u00ec v\u00e0 ch\u00fang ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o<\/a><\/li>\n<li><a href=\"https:\/\/www.cloudflare.com\/learning\/dns\/dns-troubleshooting-common-issues\/\" target=\"_new\" rel=\"noopener nofollow\">Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 DNS ph\u1ed5 bi\u1ebfn<\/a><\/li>\n<\/ol>\n<p>T\u00f3m l\u1ea1i, \u201cUnknown Host\u201d l\u00e0 m\u1ed9t l\u1ed7i ph\u1ed5 bi\u1ebfn g\u1eb7p ph\u1ea3i tr\u00ean internet khi \u0111\u1ed9 ph\u00e2n gi\u1ea3i DNS kh\u00f4ng th\u00e0nh c\u00f4ng. Hi\u1ec3u nguy\u00ean nh\u00e2n v\u00e0 gi\u1ea3i ph\u00e1p kh\u1ea3 thi c\u00f3 th\u1ec3 gi\u00fap ng\u01b0\u1eddi d\u00f9ng v\u00e0 qu\u1ea3n tr\u1ecb vi\u00ean gi\u1ea3i quy\u1ebft nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, \u0111\u1ea3m b\u1ea3o tr\u1ea3i nghi\u1ec7m duy\u1ec7t web m\u01b0\u1ee3t m\u00e0 h\u01a1n. Khi c\u00f4ng ngh\u1ec7 ti\u1ebfn b\u1ed9, kh\u1ea3 n\u0103ng x\u1ea3y ra l\u1ed7i \u201cM\u00e1y ch\u1ee7 kh\u00f4ng x\u00e1c \u0111\u1ecbnh\u201d c\u00f3 th\u1ec3 gi\u1ea3m \u0111i nh\u01b0ng t\u1ea7m quan tr\u1ecdng c\u1ee7a n\u00f3 trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u00e1c s\u1ef1 c\u1ed1 li\u00ean quan \u0111\u1ebfn DNS s\u1ebd v\u1eabn l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t trong vi\u1ec7c duy tr\u00ec c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng internet \u0111\u00e1ng tin c\u1eady.<\/p>","protected":false},"featured_media":479449,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-479448","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Unknown Host: A Comprehensive Overview<\/mark>","faq_items":[{"question":"What is \"Unknown Host\"?","answer":"<p><strong>Answer<\/strong>: \"Unknown Host\" is an error message encountered during internet browsing when a system, such as a web browser, fails to resolve the IP address of a specific domain name. This error occurs when the Domain Name System (DNS) server cannot find a matching IP address for the requested domain.<\/p>"},{"question":"Why do I see the \"Unknown Host\" error?","answer":"<p><strong>Answer<\/strong>: There are several reasons for encountering the \"Unknown Host\" error. It can be due to typographical errors in the URL, DNS server issues, domain name misconfiguration, connectivity problems, or firewall restrictions.<\/p>"},{"question":"How does the Domain Name System (DNS) work?","answer":"<p><strong>Answer<\/strong>: The DNS is a distributed system that translates human-readable domain names into machine-readable IP addresses. When you enter a URL in your web browser, the DNS resolver sends a query to a DNS server to obtain the IP address associated with the domain. If the DNS server cannot find the IP address, it responds with the \"Unknown Host\" error.<\/p>"},{"question":"What are the main types of \"Unknown Host\" errors?","answer":"<p><strong>Answer<\/strong>: The main types of \"Unknown Host\" errors include:<\/p><ol><li>Typographical Errors: Mistakes in spelling or syntax in the URL.<\/li><li>DNS Server Issues: Problems with the DNS server itself.<\/li><li>Domain Misconfiguration: Incorrectly configured DNS records for the domain.<\/li><li>Connectivity Problems: Issues with the internet connection or network.<\/li><li>Firewall Restrictions: Blocking of DNS requests by firewalls or security settings.<\/li><\/ol>"},{"question":"How can I resolve the \"Unknown Host\" error?","answer":"<p><strong>Answer<\/strong>: The solutions to the \"Unknown Host\" error depend on the specific cause. Here are some general troubleshooting steps:<\/p><ol><li>Double-check the URL for any typos.<\/li><li>Verify that the DNS server is operational and correctly configured.<\/li><li>Review the DNS records for the domain and ensure they are accurate.<\/li><li>Troubleshoot the internet connection and network settings.<\/li><li>Check the firewall settings and make sure DNS requests are not blocked.<\/li><\/ol>"},{"question":"How can proxy servers be associated with \"Unknown Host\"?","answer":"<p><strong>Answer<\/strong>: Proxy servers can help address \"Unknown Host\" errors by acting as intermediaries between the client and the DNS server. When you access a website through a proxy server, the DNS resolution is performed by the proxy. If the proxy successfully resolves the domain, it retrieves the content from the web server and forwards it to you, bypassing potential DNS-related issues on your system.<\/p>"},{"question":"What are the future perspectives related to \"Unknown Host\"?","answer":"<p><strong>Answer<\/strong>: As technology evolves, advancements in DNS infrastructure and improved error handling mechanisms in web browsers may reduce the occurrence of \"Unknown Host\" errors. Additionally, the widespread adoption of IPv6 may bring changes in how DNS resolution is performed, impacting the likelihood of encountering such errors.<\/p>"},{"question":"Where can I find more information about \"Unknown Host\" and related topics?","answer":"<p><strong>Answer<\/strong>: For more information about \"Unknown Host\" errors, DNS, and proxy servers, you can explore the following resources:<\/p><ol><li><a href=\"https:\/\/www.cloudflare.com\/learning\/dns\/what-is-dns\/\" target=\"_new\">DNS Explained: How the Domain Name System Works<\/a><\/li><li><a href=\"https:\/\/www.cloudflare.com\/learning\/cdn\/glossary\/reverse-proxy\/\" target=\"_new\">Proxy Servers: What They Are and How They Work<\/a><\/li><li><a href=\"https:\/\/www.cloudflare.com\/learning\/dns\/dns-troubleshooting-common-issues\/\" target=\"_new\">Troubleshooting Common DNS Issues<\/a><\/li><\/ol>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/479448","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\/479448\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/479449"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=479448"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}