{"id":925580,"date":"2024-08-05T00:48:46","date_gmt":"2024-08-05T00:48:46","guid":{"rendered":"https:\/\/proxyelite.info\/?p=925580"},"modified":"2024-08-05T00:48:47","modified_gmt":"2024-08-05T00:48:47","slug":"what-is-dns","status":"publish","type":"post","link":"https:\/\/proxyelite.info\/vi\/what-is-dns\/","title":{"rendered":"DNS l\u00e0 g\u00ec?"},"content":{"rendered":"
Thu\u1eadt ng\u1eef<\/strong><\/th>S\u1ef1 mi\u00eau t\u1ea3<\/strong><\/th><\/tr><\/thead>
DNS<\/strong><\/td>H\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n, h\u1ec7 th\u1ed1ng 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.<\/td><\/tr>
T\u00ean mi\u1ec1n<\/strong><\/td>\u0110\u1ecba ch\u1ec9 m\u00e0 con ng\u01b0\u1eddi c\u00f3 th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 truy c\u1eadp m\u1ed9t trang web (v\u00ed d\u1ee5: example.com<\/code>).<\/td><\/tr>
\u0110\u1ecba ch\u1ec9 IP<\/strong><\/td>Nh\u00e3n s\u1ed1 \u0111\u01b0\u1ee3c g\u00e1n cho t\u1eebng thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi m\u1ea1ng m\u00e1y t\u00ednh (v\u00ed d\u1ee5: 192.0.2.1<\/code>).<\/td><\/tr>
Tr\u00ecnh ph\u00e2n gi\u1ea3i DNS<\/strong><\/td>M\u1ed9t m\u00e1y ch\u1ee7 ph\u1ea3n h\u1ed3i c\u00e1c truy v\u1ea5n DNS t\u1eeb c\u00e1c thi\u1ebft b\u1ecb kh\u00e1ch.<\/td><\/tr>
M\u00e1y ch\u1ee7 DNS c\u00f3 th\u1ea9m quy\u1ec1n<\/strong><\/td>M\u00e1y ch\u1ee7 DNS l\u01b0u gi\u1eef c\u00e1c b\u1ea3n ghi ch\u00ednh x\u00e1c cho m\u1ed9t t\u00ean mi\u1ec1n.<\/td><\/tr>
M\u00e1y ch\u1ee7 DNS g\u1ed1c<\/strong><\/td>B\u01b0\u1edbc \u0111\u1ea7u ti\u00ean trong vi\u1ec7c d\u1ecbch t\u00ean mi\u1ec1n sang \u0111\u1ecba ch\u1ec9 IP, chuy\u1ec3n c\u00e1c truy v\u1ea5n \u0111\u1ebfn c\u00e1c m\u00e1y ch\u1ee7 t\u00ean mi\u1ec1n c\u1ea5p cao nh\u1ea5t th\u00edch h\u1ee3p.<\/td><\/tr>
M\u00e1y ch\u1ee7 TLD<\/strong><\/td>M\u00e1y ch\u1ee7 mi\u1ec1n c\u1ea5p cao nh\u1ea5t, ch\u1ecbu tr\u00e1ch nhi\u1ec7m v\u1ec1 c\u00e1c ph\u1ea7n m\u1edf r\u1ed9ng t\u00ean mi\u1ec1n c\u1ee5 th\u1ec3 nh\u01b0 .com<\/code>, .org<\/code>, v\u00e2n v\u00e2n.<\/td><\/tr>
B\u1ed9 nh\u1edb \u0111\u1ec7m<\/strong><\/td>V\u1ecb tr\u00ed l\u01b0u tr\u1eef n\u01a1i l\u01b0u tr\u1eef d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c truy c\u1eadp th\u01b0\u1eddng xuy\u00ean \u0111\u1ec3 truy xu\u1ea5t nhanh h\u01a1n.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

H\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n (DNS) l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n quan tr\u1ecdng c\u1ee7a c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng Internet. N\u00f3 ho\u1ea1t \u0111\u1ed9ng gi\u1ed1ng nh\u01b0 m\u1ed9t danh b\u1ea1 \u0111i\u1ec7n tho\u1ea1i, d\u1ecbch c\u00e1c t\u00ean mi\u1ec1n th\u00e2n thi\u1ec7n v\u1edbi con ng\u01b0\u1eddi th\u00e0nh \u0111\u1ecba ch\u1ec9 IP m\u00e0 c\u00e1c m\u00e1y t\u00ednh s\u1eed d\u1ee5ng \u0111\u1ec3 nh\u1eadn d\u1ea1ng nhau tr\u00ean m\u1ea1ng. N\u1ebfu kh\u00f4ng c\u00f3 DNS, Internet nh\u01b0 ch\u00fang ta bi\u1ebft s\u1ebd kh\u00f4ng th\u1ec3 t\u1ed3n t\u1ea1i \u0111\u01b0\u1ee3c v\u00ec ng\u01b0\u1eddi d\u00f9ng s\u1ebd bu\u1ed9c ph\u1ea3i nh\u1edb c\u00e1c chu\u1ed7i s\u1ed1 ph\u1ee9c t\u1ea1p thay v\u00ec t\u00ean trang web \u0111\u01a1n gi\u1ea3n.<\/p>\n\n\n\n

T\u1ea1i sao DNS l\u1ea1i c\u1ea7n thi\u1ebft<\/h2>\n\n\n\n

DNS \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c l\u00e0m cho Internet tr\u1edf n\u00ean th\u00e2n thi\u1ec7n v\u00e0 d\u1ec5 ti\u1ebfp c\u1eadn v\u1edbi ng\u01b0\u1eddi d\u00f9ng. N\u00f3 cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng nh\u1eadp t\u00ean mi\u1ec1n d\u1ec5 nh\u1edb v\u00e0o tr\u00ecnh duy\u1ec7t web c\u1ee7a h\u1ecd, sau \u0111\u00f3 ch\u00fang \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i th\u00e0nh \u0111\u1ecba ch\u1ec9 IP h\u01b0\u1edbng thi\u1ebft b\u1ecb c\u1ee7a ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn trang web mong mu\u1ed1n. Qu\u00e1 tr\u00ecnh n\u00e0y di\u1ec5n ra \u1edf ch\u1ebf \u0111\u1ed9 n\u1ec1n, g\u1ea7n nh\u01b0 ngay l\u1eadp t\u1ee9c, \u0111\u1ea3m b\u1ea3o tr\u1ea3i nghi\u1ec7m duy\u1ec7t web li\u1ec1n m\u1ea1ch.<\/p>\n\n\n\n

Nh\u01b0ng DNS kh\u00f4ng ch\u1ec9 mang l\u1ea1i s\u1ef1 ti\u1ec7n l\u1ee3i. \u0110\u00f3 c\u0169ng l\u00e0 v\u1ec1 an ninh v\u00e0 hi\u1ec7u qu\u1ea3. C\u00e1c h\u1ec7 th\u1ed1ng DNS hi\u1ec7n \u0111\u1ea1i k\u1ebft h\u1ee3p c\u00e1c t\u00ednh n\u0103ng gi\u00fap ng\u0103n ch\u1eb7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng m\u1ea1ng, nh\u01b0 gi\u1ea3 m\u1ea1o DNS ho\u1eb7c \u0111\u1ea7u \u0111\u1ed9c b\u1ed9 nh\u1edb \u0111\u1ec7m, nh\u1eefng t\u00ednh n\u0103ng n\u00e0y c\u00f3 th\u1ec3 chuy\u1ec3n h\u01b0\u1edbng ng\u01b0\u1eddi d\u00f9ng \u0111\u1ebfn c\u00e1c trang web \u0111\u1ed9c h\u1ea1i.<\/p>\n\n\n\n

C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a DNS: Ph\u00e2n t\u00edch t\u1eebng b\u01b0\u1edbc<\/h2>\n\n\n\n

Qu\u00e1 tr\u00ecnh ph\u00e2n gi\u1ea3i t\u00ean mi\u1ec1n th\u00e0nh \u0111\u1ecba ch\u1ec9 IP bao g\u1ed3m m\u1ed9t s\u1ed1 b\u01b0\u1edbc:<\/p>\n\n\n\n

    \n
  1. B\u1eaft \u0111\u1ea7u truy v\u1ea5n DNS<\/strong>
    Khi b\u1ea1n nh\u1eadp t\u00ean mi\u1ec1n v\u00e0o tr\u00ecnh duy\u1ec7t, thi\u1ebft b\u1ecb c\u1ee7a b\u1ea1n s\u1ebd g\u1eedi truy v\u1ea5n t\u1edbi tr\u00ecnh ph\u00e2n gi\u1ea3i DNS, th\u01b0\u1eddng \u0111\u01b0\u1ee3c cung c\u1ea5p b\u1edfi Nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 Internet (ISP) c\u1ee7a b\u1ea1n. \u0110\u00e2y l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean trong vi\u1ec7c t\u00ecm \u0111\u1ecba ch\u1ec9 IP t\u01b0\u01a1ng \u1ee9ng.<\/li>\n\n\n\n
  2. Ki\u1ec3m tra b\u1ed9 \u0111\u1ec7m<\/strong>
    Tr\u00ecnh ph\u00e2n gi\u1ea3i DNS ki\u1ec3m tra b\u1ed9 \u0111\u1ec7m c\u1ee7a n\u00f3 \u0111\u1ec3 xem li\u1ec7u n\u00f3 \u0111\u00e3 bi\u1ebft \u0111\u1ecba ch\u1ec9 IP \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi t\u00ean mi\u1ec1n ch\u01b0a. N\u1ebfu \u0111\u00fang nh\u01b0 v\u1eady, tr\u00ecnh ph\u00e2n gi\u1ea3i s\u1ebd tr\u1ea3 v\u1ec1 \u0111\u1ecba ch\u1ec9 IP ngay l\u1eadp t\u1ee9c, \u0111\u1ea9y nhanh qu\u00e1 tr\u00ecnh.<\/li>\n\n\n\n
  3. M\u00e1y ch\u1ee7 DNS g\u1ed1c<\/strong>
    N\u1ebfu \u0111\u1ecba ch\u1ec9 IP kh\u00f4ng c\u00f3 trong b\u1ed9 \u0111\u1ec7m, tr\u00ecnh ph\u00e2n gi\u1ea3i s\u1ebd truy v\u1ea5n m\u00e1y ch\u1ee7 DNS g\u1ed1c. M\u00e1y ch\u1ee7 g\u1ed1c kh\u00f4ng c\u00f3 \u0111\u1ecba ch\u1ec9 IP nh\u01b0ng bi\u1ebft m\u00e1y ch\u1ee7 t\u00ean mi\u1ec1n c\u1ea5p cao nh\u1ea5t (TLD) n\u00e0o s\u1ebd h\u1ecfi ti\u1ebfp theo.<\/li>\n\n\n\n
  4. M\u00e1y ch\u1ee7 DNS TLD<\/strong>
    M\u00e1y ch\u1ee7 g\u1ed1c h\u01b0\u1edbng tr\u00ecnh ph\u00e2n gi\u1ea3i t\u1edbi m\u00e1y ch\u1ee7 TLD, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u00e1y ch\u1ee7 ch\u1ecbu tr\u00e1ch nhi\u1ec7m v\u1ec1 .com<\/code>, .org<\/code>, ho\u1eb7c .net<\/code>. M\u00e1y ch\u1ee7 TLD bi\u1ebft m\u00e1y ch\u1ee7 DNS c\u00f3 th\u1ea9m quy\u1ec1n ch\u1ee9a \u0111\u1ecba ch\u1ec9 IP th\u1ef1c t\u1ebf.<\/li>\n\n\n\n
  5. M\u00e1y ch\u1ee7 DNS c\u00f3 th\u1ea9m quy\u1ec1n<\/strong>
    Cu\u1ed1i c\u00f9ng, m\u00e1y ch\u1ee7 TLD tr\u1ecf tr\u00ecnh ph\u00e2n gi\u1ea3i \u0111\u1ebfn m\u00e1y ch\u1ee7 DNS c\u00f3 th\u1ea9m quy\u1ec1n, n\u01a1i ch\u1ee9a c\u00e1c b\u1ea3n ghi cho t\u00ean mi\u1ec1n c\u1ee5 th\u1ec3. M\u00e1y ch\u1ee7 n\u00e0y tr\u1ea3 v\u1ec1 \u0111\u1ecba ch\u1ec9 IP cho tr\u00ecnh ph\u00e2n gi\u1ea3i.<\/li>\n\n\n\n
  6. K\u1ebft n\u1ed1i v\u1edbi trang web<\/strong>
    V\u1edbi \u0111\u1ecba ch\u1ec9 IP trong tay, tr\u00ecnh duy\u1ec7t c\u1ee7a b\u1ea1n gi\u1edd \u0111\u00e2y c\u00f3 th\u1ec3 k\u1ebft n\u1ed1i v\u1edbi m\u00e1y ch\u1ee7 web l\u01b0u tr\u1eef trang web v\u00e0 trang web s\u1ebd t\u1ea3i tr\u00ean m\u00e0n h\u00ecnh c\u1ee7a b\u1ea1n.<\/li>\n<\/ol>\n\n\n\n

    To\u00e0n b\u1ed9 chu\u1ed7i n\u00e0y th\u01b0\u1eddng ch\u1ec9 m\u1ea5t m\u1ed9t ph\u1ea7n ngh\u00ecn gi\u00e2y nh\u01b0ng n\u00f3 li\u00ean quan \u0111\u1ebfn vi\u1ec7c li\u00ean l\u1ea1c gi\u1eefa nhi\u1ec1u m\u00e1y ch\u1ee7 tr\u00ean to\u00e0n c\u1ea7u.<\/p>\n\n\n\n

    M\u00e1y ch\u1ee7 DNS v\u00e0 proxy<\/h2>\n\n\n\n

    \u0110\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi s\u1eed d\u1ee5ng m\u00e1y ch\u1ee7 proxy, vi\u1ec7c hi\u1ec3u DNS l\u00e0 r\u1ea5t quan tr\u1ecdng. M\u00e1y ch\u1ee7 proxy \u0111\u00f3ng vai tr\u00f2 trung gian gi\u1eefa thi\u1ebft b\u1ecb c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 internet, che gi\u1ea5u \u0111\u1ecba ch\u1ec9 IP c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 cung c\u1ea5p quy\u1ec1n ri\u00eang t\u01b0. Tuy nhi\u00ean, c\u00e1c truy v\u1ea5n DNS \u0111\u00f4i khi c\u00f3 th\u1ec3 b\u1ecf qua proxy, l\u00e0m l\u1ed9 \u0111\u1ecba ch\u1ec9 IP th\u1ef1c c\u1ee7a ng\u01b0\u1eddi d\u00f9ng. \u0110i\u1ec1u n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 r\u00f2 r\u1ec9 DNS.<\/p>\n\n\n\n

    \u0110\u1ec3 ng\u0103n ch\u1eb7n r\u00f2 r\u1ec9 DNS, ng\u01b0\u1eddi d\u00f9ng n\u00ean \u0111\u1ea3m b\u1ea3o c\u00e1c truy v\u1ea5n DNS c\u1ee7a h\u1ecd \u0111\u01b0\u1ee3c \u0111\u1ecbnh tuy\u1ebfn qua m\u00e1y ch\u1ee7 proxy ho\u1eb7c s\u1eed d\u1ee5ng d\u1ecbch v\u1ee5 proxy c\u00f3 t\u00ednh n\u0103ng b\u1ea3o v\u1ec7 r\u00f2 r\u1ec9 DNS. \u0110i\u1ec1u n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng t\u1ea5t c\u1ea3 c\u00e1c ph\u1ea7n c\u1ee7a k\u1ebft n\u1ed1i, bao g\u1ed3m c\u1ea3 truy v\u1ea5n DNS, v\u1eabn \u1edf ch\u1ebf \u0111\u1ed9 ri\u00eang t\u01b0 v\u00e0 an to\u00e0n.<\/p>\n\n\n\n

    C\u00e1c lo\u1ea1i DNS v\u00e0 c\u00e1ch s\u1eed d\u1ee5ng c\u1ee7a ch\u00fang<\/h2>\n\n\n\n

    DNS kh\u00f4ng ph\u1ea3i l\u00e0 gi\u1ea3i ph\u00e1p ph\u00f9 h\u1ee3p cho t\u1ea5t c\u1ea3; c\u00f3 nhi\u1ec1u lo\u1ea1i c\u1ea5u h\u00ecnh DNS kh\u00e1c nhau, m\u1ed7i lo\u1ea1i ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u c\u1ee5 th\u1ec3:<\/p>\n\n\n\n

      \n
    1. DNS c\u00f4ng c\u1ed9ng<\/strong>
      C\u00e1c m\u00e1y ch\u1ee7 DNS c\u00f4ng c\u1ed9ng, nh\u01b0 c\u00e1c m\u00e1y ch\u1ee7 do Google (v\u00ed d\u1ee5: 8.8.8.8) ho\u1eb7c Cloudflare (v\u00ed d\u1ee5: 1.1.1.1) cung c\u1ea5p, \u0111\u1ec1u c\u00f3 s\u1eb5n cho b\u1ea5t k\u1ef3 ai v\u00e0 cung c\u1ea5p \u0111\u1ed9 ph\u00e2n gi\u1ea3i DNS nhanh ch\u00f3ng, \u0111\u00e1ng tin c\u1eady. Ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m l\u1ef1a ch\u1ecdn thay th\u1ebf cho c\u00e1c d\u1ecbch v\u1ee5 DNS do ISP cung c\u1ea5p.<\/li>\n\n\n\n
    2. DNS ri\u00eang<\/strong>
      M\u00e1y ch\u1ee7 DNS ri\u00eang th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u1ed9t t\u1ed5 ch\u1ee9c \u0111\u1ec3 qu\u1ea3n l\u00fd \u0111\u1ed9 ph\u00e2n gi\u1ea3i t\u00ean mi\u1ec1n n\u1ed9i b\u1ed9. Ch\u00fang cung c\u1ea5p m\u1ed9t l\u1edbp b\u1ea3o m\u1eadt v\u00e0 ki\u1ec3m so\u00e1t b\u1ed5 sung \u0111\u1ed1i v\u1edbi quy tr\u00ecnh DNS, \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c t\u00ean mi\u1ec1n n\u1ed9i b\u1ed9 \u0111\u01b0\u1ee3c ph\u00e2n gi\u1ea3i trong m\u1ea1ng ri\u00eang.<\/li>\n\n\n\n
    3. DNS \u0111\u1ec7 quy<\/strong>
      Tr\u00ecnh ph\u00e2n gi\u1ea3i DNS \u0111\u1ec7 quy ho\u1ea1t \u0111\u1ed9ng thay m\u1eb7t kh\u00e1ch h\u00e0ng b\u1eb1ng c\u00e1ch truy v\u1ea5n nhi\u1ec1u m\u00e1y ch\u1ee7 DNS \u0111\u1ec3 t\u00ecm \u0111\u1ecba ch\u1ec9 IP \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi m\u1ed9t t\u00ean mi\u1ec1n. N\u00f3 gi\u1ed1ng nh\u01b0 m\u1ed9t ng\u01b0\u1eddi trung gian th\u1ef1c hi\u1ec7n t\u1ea5t c\u1ea3 nh\u1eefng c\u00f4ng vi\u1ec7c n\u1eb7ng nh\u1ecdc n\u00ean ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i kh\u00f4ng ph\u1ea3i lo l\u1eafng v\u1ec1 s\u1ef1 ph\u1ee9c t\u1ea1p c\u1ee7a quy tr\u00ecnh DNS.<\/li>\n\n\n\n
    4. DNS c\u00f3 th\u1ea9m quy\u1ec1n<\/strong>
      M\u00e1y ch\u1ee7 DNS c\u00f3 th\u1ea9m quy\u1ec1n l\u00e0 ngu\u1ed3n ch\u00ednh x\u00e1c cho c\u00e1c b\u1ea3n ghi t\u00ean mi\u1ec1n c\u1ee5 th\u1ec3. N\u00f3 ch\u1ee9a c\u00e1c b\u1ea3n ghi DNS cung c\u1ea5p c\u00e2u tr\u1ea3 l\u1eddi cho c\u00e1c truy v\u1ea5n v\u1ec1 t\u00ean mi\u1ec1n c\u1ee7a n\u00f3, \u0111\u1ea3m b\u1ea3o r\u1eb1ng \u0111\u1ecba ch\u1ec9 IP ch\u00ednh x\u00e1c \u0111\u01b0\u1ee3c tr\u1ea3 v\u1ec1 cho ng\u01b0\u1eddi d\u00f9ng \u0111ang c\u1ed1 g\u1eafng truy c\u1eadp v\u00e0o mi\u1ec1n.<\/li>\n<\/ol>\n\n\n\n

      Vai tr\u00f2 c\u1ee7a DNS trong an ninh m\u1ea1ng<\/h2>\n\n\n\n

      DNS th\u01b0\u1eddng l\u00e0 m\u1ee5c ti\u00eau trong c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng m\u1ea1ng do vai tr\u00f2 quan tr\u1ecdng c\u1ee7a n\u00f3 \u0111\u1ed1i v\u1edbi ch\u1ee9c n\u0103ng internet. C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng li\u00ean quan \u0111\u1ebfn DNS ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n\n\n\n

        \n
      • Gi\u1ea3 m\u1ea1o DNS<\/strong>
        C\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 ng\u1ed9 \u0111\u1ed9c b\u1ed9 \u0111\u1ec7m DNS, cu\u1ed9c t\u1ea5n c\u00f4ng n\u00e0y li\u00ean quan \u0111\u1ebfn vi\u1ec7c ch\u00e8n c\u00e1c b\u1ea3n ghi DNS sai v\u00e0o b\u1ed9 \u0111\u1ec7m c\u1ee7a tr\u00ecnh ph\u00e2n gi\u1ea3i, khi\u1ebfn ng\u01b0\u1eddi d\u00f9ng b\u1ecb chuy\u1ec3n h\u01b0\u1edbng \u0111\u1ebfn c\u00e1c trang web \u0111\u1ed9c h\u1ea1i m\u00e0 h\u1ecd kh\u00f4ng h\u1ec1 hay bi\u1ebft.<\/li>\n\n\n\n
      • T\u1ea5n c\u00f4ng DDoS<\/strong>
        C\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5 ph\u00e2n t\u00e1n (DDoS) c\u00f3 th\u1ec3 khi\u1ebfn c\u00e1c m\u00e1y ch\u1ee7 DNS tr\u00e0n ng\u1eadp y\u00eau c\u1ea7u, khi\u1ebfn ch\u00fang kh\u00f4ng th\u1ec3 ph\u1ea3n h\u1ed3i c\u00e1c truy v\u1ea5n h\u1ee3p ph\u00e1p v\u00e0 khi\u1ebfn c\u00e1c trang web ngo\u1ea1i tuy\u1ebfn m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/li>\n<\/ul>\n\n\n\n

        \u0110\u1ec3 gi\u1ea3m thi\u1ec3u nh\u1eefng r\u1ee7i ro n\u00e0y, c\u00e1c t\u1ed5 ch\u1ee9c tri\u1ec3n khai c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt DNS nh\u01b0 DNSSEC (Ti\u1ec7n \u00edch m\u1edf r\u1ed9ng b\u1ea3o m\u1eadt DNS), b\u1ed5 sung m\u1ed9t l\u1edbp b\u1ea3o m\u1eadt b\u1eb1ng c\u00e1ch cho ph\u00e9p c\u00e1c ph\u1ea3n h\u1ed3i DNS \u0111\u01b0\u1ee3c k\u00fd \u0111i\u1ec7n t\u1eed.<\/p>\n\n\n\n

        C\u00f4ng c\u1ee5 v\u00e0 t\u00e0i nguy\u00ean DNS<\/h2>\n\n\n\n

        M\u1ed9t s\u1ed1 c\u00f4ng c\u1ee5 v\u00e0 t\u00e0i nguy\u00ean c\u00f3 th\u1ec3 gi\u00fap ng\u01b0\u1eddi d\u00f9ng v\u00e0 qu\u1ea3n tr\u1ecb vi\u00ean qu\u1ea3n l\u00fd v\u00e0 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 DNS:<\/p>\n\n\n\n

          \n
        1. C\u00f4ng c\u1ee5 tra c\u1ee9u DNS<\/strong>
          C\u00e1c c\u00f4ng c\u1ee5 tr\u1ef1c tuy\u1ebfn nh\u01b0 dig<\/code>, nslookup<\/code>v\u00e0 c\u00e1c d\u1ecbch v\u1ee5 tr\u1ef1c tuy\u1ebfn nh\u01b0 MXToolbox cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng truy v\u1ea5n b\u1ea3n ghi DNS, x\u00e1c minh c\u1ea5u h\u00ecnh DNS v\u00e0 ch\u1ea9n \u0111o\u00e1n s\u1ef1 c\u1ed1.<\/li>\n\n\n\n
        2. C\u00f4ng c\u1ee5 \u0111o \u0111i\u1ec3m chu\u1ea9n DNS<\/strong>
          C\u00f4ng c\u1ee5 nh\u01b0 Namebench<\/code> ho\u1eb7c DNS Benchmark<\/code> c\u00f3 th\u1ec3 ki\u1ec3m tra t\u1ed1c \u0111\u1ed9 v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a nhi\u1ec1u m\u00e1y ch\u1ee7 DNS kh\u00e1c nhau, gi\u00fap ng\u01b0\u1eddi d\u00f9ng ch\u1ecdn nh\u00e0 cung c\u1ea5p DNS nhanh nh\u1ea5t cho nhu c\u1ea7u c\u1ee7a m\u00ecnh.<\/li>\n\n\n\n
        3. Ph\u1ea7n m\u1ec1m qu\u1ea3n l\u00fd DNS<\/strong>
          \u0110\u1ed1i v\u1edbi c\u00e1c t\u1ed5 ch\u1ee9c, ph\u1ea7n m\u1ec1m qu\u1ea3n l\u00fd DNS cung c\u1ea5p n\u1ec1n t\u1ea3ng t\u1eadp trung \u0111\u1ec3 qu\u1ea3n l\u00fd b\u1ea3n ghi DNS, gi\u00e1m s\u00e1t ho\u1ea1t \u0111\u1ed9ng DNS v\u00e0 \u0111\u1ea3m b\u1ea3o c\u1ea5u h\u00ecnh DNS \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a v\u00e0 b\u1ea3o m\u1eadt.<\/li>\n<\/ol>\n\n\n\n

          T\u01b0\u01a1ng lai c\u1ee7a DNS<\/h2>\n\n\n\n

          Khi Internet ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n th\u00ec DNS c\u0169ng v\u1eady. Vi\u1ec7c \u00e1p d\u1ee5ng DNS qua HTTPS (DoH) v\u00e0 DNS qua TLS (DoT) l\u00e0 v\u00ed d\u1ee5 v\u1ec1 c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 c\u1ea3i thi\u1ec7n quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 b\u1ea3o m\u1eadt c\u1ee7a DNS b\u1eb1ng c\u00e1ch m\u00e3 h\u00f3a c\u00e1c truy v\u1ea5n DNS. C\u00e1c giao th\u1ee9c n\u00e0y ng\u0103n ch\u1eb7n c\u00e1c b\u00ean th\u1ee9 ba ch\u1eb7n ho\u1eb7c thao t\u00fang c\u00e1c truy v\u1ea5n DNS, mang l\u1ea1i s\u1ef1 b\u1ea3o v\u1ec7 t\u1ed1t h\u01a1n cho ng\u01b0\u1eddi d\u00f9ng.<\/p>\n\n\n\n

          H\u01a1n n\u1eefa, khi s\u1ed1 l\u01b0\u1ee3ng thi\u1ebft b\u1ecb k\u1ebft n\u1ed1i Internet t\u0103ng l\u00ean, DNS s\u1ebd c\u1ea7n ph\u1ea3i m\u1edf r\u1ed9ng quy m\u00f4 \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u ng\u00e0y c\u00e0ng t\u0103ng. \u0110i\u1ec1u n\u00e0y bao g\u1ed3m vi\u1ec7c h\u1ed7 tr\u1ee3 chuy\u1ec3n \u0111\u1ed5i sang IPv6, cho ph\u00e9p s\u1ed1 l\u01b0\u1ee3ng \u0111\u1ecba ch\u1ec9 IP l\u1edbn h\u01a1n r\u1ea5t nhi\u1ec1u so v\u1edbi h\u1ec7 th\u1ed1ng IPv4 c\u0169.<\/p>\n\n\n\n

          Ph\u1ea7n k\u1ebft lu\u1eadn<\/h2>\n\n\n\n

          Hi\u1ec3u DNS l\u00e0 r\u1ea5t quan tr\u1ecdng kh\u00f4ng ch\u1ec9 \u0111\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi l\u00e0m vi\u1ec7c trong l\u0129nh v\u1ef1c CNTT m\u00e0 c\u00f2n \u0111\u1ed1i v\u1edbi b\u1ea5t k\u1ef3 ai s\u1eed d\u1ee5ng internet. N\u00f3 l\u00e0 x\u01b0\u01a1ng s\u1ed1ng gi\u00fap cho vi\u1ec7c duy\u1ec7t web hi\u1ec7n \u0111\u1ea1i tr\u1edf n\u00ean kh\u1ea3 thi, d\u1ecbch c\u00e1c t\u00ean mi\u1ec1n th\u00e2n thi\u1ec7n v\u1edbi ng\u01b0\u1eddi d\u00f9ng th\u00e0nh \u0111\u1ecba ch\u1ec9 IP m\u00e0 m\u00e1y t\u00ednh s\u1eed d\u1ee5ng \u0111\u1ec3 li\u00ean l\u1ea1c. V\u1edbi s\u1ef1 ch\u00fa tr\u1ecdng ng\u00e0y c\u00e0ng t\u0103ng v\u1ec1 b\u1ea3o m\u1eadt v\u00e0 quy\u1ec1n ri\u00eang t\u01b0 tr\u00ean Internet, vi\u1ec7c bi\u1ebft c\u00e1ch DNS ho\u1ea1t \u0111\u1ed9ng v\u00e0 c\u00e1ch b\u1ea3o v\u1ec7 c\u00e1c truy v\u1ea5n DNS l\u00e0 quan tr\u1ecdng h\u01a1n bao gi\u1edd h\u1ebft. Cho d\u00f9 b\u1ea1n \u0111ang s\u1eed d\u1ee5ng DNS c\u00f4ng c\u1ed9ng, qu\u1ea3n l\u00fd m\u00e1y ch\u1ee7 DNS ri\u00eang hay b\u1ea3o m\u1eadt c\u00e1c ho\u1ea1t \u0111\u1ed9ng tr\u1ef1c tuy\u1ebfn c\u1ee7a m\u00ecnh th\u00f4ng qua m\u00e1y ch\u1ee7 proxy, th\u00ec vi\u1ec7c n\u1eafm v\u1eefng c\u00e1c nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n v\u1ec1 DNS l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft.<\/p>\n\n\n\n

          B\u1eb1ng c\u00e1ch \u0111\u00e1nh gi\u00e1 cao s\u1ef1 ph\u1ee9c t\u1ea1p c\u1ee7a DNS, ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 \u0111\u1ea3m b\u1ea3o tr\u1ea3i nghi\u1ec7m tr\u1ef1c tuy\u1ebfn an to\u00e0n h\u01a1n, hi\u1ec7u qu\u1ea3 h\u01a1n v\u00e0 \u0111\u00e1ng tin c\u1eady h\u01a1n.<\/p>","protected":false},"excerpt":{"rendered":"

          Term Description DNS Domain Name System, the system that translates human-readable domain names into IP addresses. Domain Name The human-readable address used to access a website (e.g., example.com). IP Address A numerical label assigned to each device connected to a computer network (e.g., 192.0.2.1). DNS Resolver A server that responds to DNS queries from client […]<\/p>\n","protected":false},"author":1,"featured_media":925581,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-925580","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles"],"acf":[],"_links":{"self":[{"href":"https:\/\/proxyelite.info\/vi\/wp-json\/wp\/v2\/posts\/925580","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/proxyelite.info\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/proxyelite.info\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/proxyelite.info\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/proxyelite.info\/vi\/wp-json\/wp\/v2\/comments?post=925580"}],"version-history":[{"count":1,"href":"https:\/\/proxyelite.info\/vi\/wp-json\/wp\/v2\/posts\/925580\/revisions"}],"predecessor-version":[{"id":925582,"href":"https:\/\/proxyelite.info\/vi\/wp-json\/wp\/v2\/posts\/925580\/revisions\/925582"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/proxyelite.info\/vi\/wp-json\/wp\/v2\/media\/925581"}],"wp:attachment":[{"href":"https:\/\/proxyelite.info\/vi\/wp-json\/wp\/v2\/media?parent=925580"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/proxyelite.info\/vi\/wp-json\/wp\/v2\/categories?post=925580"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/proxyelite.info\/vi\/wp-json\/wp\/v2\/tags?post=925580"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}