{"id":13899,"date":"2022-06-28T09:51:33","date_gmt":"2022-06-28T02:51:33","guid":{"rendered":"https:\/\/www.hostify.vn\/blog\/?p=13899"},"modified":"2022-06-28T09:51:33","modified_gmt":"2022-06-28T02:51:33","slug":"loi-503-la-gi","status":"publish","type":"post","link":"https:\/\/www.hostify.vn\/blog\/loi-503-la-gi\/","title":{"rendered":"L\u1ed7i 503 l\u00e0 g\u00ec? Nguy\u00ean nh\u00e2n v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c"},"content":{"rendered":"

\"L\u1ed7i<\/strong><\/p>\n

H\u1ea7u h\u1ebft ng\u01b0\u1eddi d\u00f9ng, \u1edf m\u1ed9t th\u1eddi \u0111i\u1ec3m n\u00e0o \u0111\u00f3, c\u0169ng s\u1ebd g\u1eb7p ph\u1ea3i m\u1ed9t trang web b\u1ecb l\u1ed7i v\u1edbi th\u00f4ng b\u00e1o \u201cHTTP error 503\u201d. Nh\u01b0ng HTTP error 503 l\u00e0 g\u00ec?<\/p>\n

\u0110\u00e2y l\u00e0 m\u1ed9t l\u1ed7i x\u1ea3y ra khi tr\u00ecnh duy\u1ec7t c\u1ee7a b\u1ea1n truy c\u1eadp v\u00e0o m\u1ed9t website kh\u00f4ng th\u1ec3 thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i \u0111\u1ebfn m\u00e1y ch\u1ee7 c\u1ee7a n\u00f3.<\/p>\n

B\u1ea1n c\u00f3 th\u1ec3 nh\u1ea7m l\u1eabn l\u1ed7i n\u00e0y v\u1edbi l\u1ed7i \u201c502 bad gateway\u201d, nh\u01b0ng tr\u00ean th\u1ef1c t\u1ebf, l\u1ed7i 503 b\u00e1o hi\u1ec7u m\u1ed9t v\u1ea5n \u0111\u1ec1 \u0111\u00e1ng quan ng\u1ea1i h\u01a1n, \u0111\u1eb7c bi\u1ec7t v\u1edbi nh\u1eefng ng\u01b0\u1eddi ch\u01b0a c\u00f3 nhi\u1ec1u n\u0103m kinh nghi\u1ec7m trong l\u0129nh v\u1ef1c IT.<\/p>\n

\u0110\u00f4i l\u00fac, ch\u1ec9 c\u1ea7n l\u00e0m m\u1edbi trang l\u00e0 \u0111\u00e3 \u0111\u1ee7 \u0111\u1ec3 s\u1eeda l\u1ed7i, nh\u01b0ng \u0111\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3i quy\u1ebft t\u1eadn g\u1ed1c v\u1ea5n \u0111\u1ec1.<\/p>\n

B\u1ea1n c\u00f3 th\u1ec3 c\u1ea7n t\u00ecm nguy\u00ean nh\u00e2n c\u1ee7a l\u1ed7i trong m\u1ea1ng m\u00e1y t\u00ednh \u0111ang qu\u1ea3n l\u00fd, v\u00e0 trong \u0111\u1ea1i \u0111a s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, l\u1ed7i 503 b\u1eaft ngu\u1ed3n t\u1eeb nh\u1eefng v\u1ea5n \u0111\u1ec1 v\u1edbi m\u00e1y ch\u1ee7 web m\u00e0 tr\u00ecnh duy\u1ec7t \u0111ang c\u1ed1 ti\u1ebfp c\u1eadn. N\u1ebfu \u0111\u00fang nh\u01b0 v\u1eady, m\u1ed9t ng\u01b0\u1eddi d\u00f9ng th\u00f4ng th\u01b0\u1eddng kh\u00f4ng th\u1ec3 l\u00e0m g\u00ec nhi\u1ec1u ngo\u00e0i vi\u1ec7c li\u00ean h\u1ec7 v\u1edbi admin \u0111i\u1ec1u h\u00e0nh trang (\u0111\u00f3 l\u00e0 n\u1ebfu b\u1ea1n may m\u1eafn c\u00f3 \u0111\u01b0\u1ee3c th\u00f4ng tin li\u00ean h\u1ec7 c\u1ea7n thi\u1ebft!).<\/p>\n

L\u1ed7i HTTP error 503 c\u00f3 ngh\u0129a g\u00ec?<\/h3>\n

Khi b\u1ea1n th\u1ea5y l\u1ed7i 503, c\u00f3 ngh\u0129a l\u00e0 \u0111i\u1ec1u g\u00ec \u0111\u00f3 \u0111\u00e3 ng\u0103n tr\u00ecnh duy\u1ec7t c\u1ee7a b\u1ea1n truy c\u1eadp m\u00e1y ch\u1ee7 c\u1ee7a website b\u1ecb \u1ea3nh h\u01b0\u1edfng, v\u00e0 th\u00f4ng th\u01b0\u1eddng, ch\u00ednh b\u1ea3n th\u00e2n m\u00e1y ch\u1ee7 \u0111ang g\u1eb7p l\u1ed7i.<\/p>\n

N\u0103m 2021, r\u1ea5t nhi\u1ec1u website ph\u1ed5 bi\u1ebfn \u0111\u00e3 g\u1eb7p l\u1ed7i 503 do s\u1ef1 c\u1ed1 s\u1eadp Fastly.<\/p>\n

C\u00e1c trang web b\u1ecb \u1ea3nh h\u01b0\u1edfng bao g\u1ed3m t\u1ea5t c\u1ea3 c\u00e1c website \u0111u\u00f4i \u201cgov.uk<\/a>\u201d, c\u00e1c trang b\u00e1n l\u1ebb tr\u1ef1c tuy\u1ebfn nh\u01b0 Amazon v\u00e0 eBay, c\u0169ng nh\u01b0 c\u00e1c di\u1ec5n \u0111\u00e0n internet nh\u01b0 Reddit, v\u00e0 c\u00e1c trang tin nh\u01b0 Bloomberg News, CNN, The Guardian.<\/p>\n

Nguy\u00ean nh\u00e2n c\u1ee7a l\u1ed7i HTTP error 503?<\/h3>\n

X\u00e1c \u0111\u1ecbnh g\u1ed1c r\u1ec5 c\u1ee7a l\u1ed7i 503 c\u00f3 th\u1ec3 r\u1ea5t kh\u00f3. D\u1eabu v\u1eady, c\u00f3 m\u1ed9t s\u1ed1 nguy\u00ean nh\u00e2n ph\u1ed5 bi\u1ebfn m\u00e0 b\u1ea1n n\u00ean bi\u1ebft.<\/p>\n

Trong \u0111\u1ea1i \u0111a s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, l\u1ed7i 503 x\u1ea3y ra khi m\u1ed9t website kh\u00f4ng th\u1ec3 k\u1ebft n\u1ed1i v\u1edbi m\u00e1y ch\u1ee7 c\u1ee7a n\u00f3, do m\u00e1y ch\u1ee7 \u0111ang b\u1ea3o tr\u00ec ho\u1eb7c c\u00e1c v\u1ea5n \u0111\u1ec1 k\u1ef9 thu\u1eadt kh\u00e1c, ho\u1eb7c do \u0111ang b\u1ecb t\u1ea5n c\u00f4ng t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5 (DDoS).<\/p>\n

Kh\u00f4ng nh\u01b0 l\u1ed7i HTTP error 400, kh\u1ea3 n\u0103ng l\u1ed7i 503 x\u1ea3y ra do s\u1ef1 c\u1ed1 t\u1eeb m\u00e1y kh\u00e1ch – nh\u01b0 g\u00f5 nh\u1ea7m URL – l\u00e0 h\u1ea7u nh\u01b0 kh\u00f4ng th\u1ec3.<\/p>\n

C\u00e1c s\u1ef1 c\u1ed1 k\u1ef9 thu\u1eadt x\u1ea3y ra nhi\u1ec1u l\u1ea7n m\u1ed7i th\u00e1ng c\u00f3 th\u1ec3 \u0111\u1eb7c bi\u1ec7t kh\u00f3 ch\u1ecbu, v\u00e0 vi\u1ec7c website b\u1ecb l\u1ed7i k\u00e9o d\u00e0i s\u1ebd d\u1eabn \u0111\u1ebfn nhi\u1ec1u v\u1ea5n \u0111\u1ec1 t\u00e0i ch\u00ednh nghi\u00eam tr\u1ecdng cho doanh nghi\u1ec7p – \u0111\u1eb7c bi\u1ec7t n\u1ebfu doanh nghi\u1ec7p d\u1ef1a v\u00e0o l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp hay c\u00e1c \u0111\u01a1n h\u00e0ng th\u1ef1c hi\u1ec7n qua th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed.<\/p>\n

Nh\u1eefng \u0111\u1ee3t s\u1eadp m\u00e1y ch\u1ee7 k\u00e9o d\u00e0i, nh\u01b0 v\u1ee5 Atlassian su\u1ed1t 2 tu\u1ea7n v\u00e0o n\u0103m 2022, c\u00f3 th\u1ec3 khi\u1ebfn kh\u00e1ch h\u00e0ng b\u1ea5t m\u00e3n v\u00e0 g\u00e2y thi\u1ec7t h\u1ea1i cho uy t\u00edn c\u1ee7a doanh nghi\u1ec7p.<\/p>\n

N\u1ebfu b\u1ea1n ph\u00e1t hi\u1ec7n ra website c\u1ee7a m\u00ecnh b\u1ecb l\u1ed7i HTTP error 503, \u0111\u00e3 \u0111\u1ebfn l\u00fac c\u00e2n nh\u1eafc chuy\u1ec3n sang m\u1ed9t nh\u00e0 cung c\u1ea5p host kh\u00e1c. N\u1ebfu b\u1ea1n mu\u1ed1n host mi\u1ec5n ph\u00ed, gi\u00e1 r\u1ebb, ho\u1eb7c n\u1eb7c danh, th\u00ec c\u00f3 kh\u00e1 nhi\u1ec1u l\u1ef1a ch\u1ecdn t\u1ed1t d\u00e0nh cho b\u1ea1n.<\/p>\n

D\u00f9 l\u1ed7i 503 c\u00f3 th\u1ec3 l\u00e0m s\u1ee5t gi\u1ea3m s\u1ed1 l\u01b0\u1ee3ng kh\u00e1ch h\u00e0ng gh\u00e9 th\u0103m trang, s\u1ef1 gia t\u0103ng nhanh ch\u00f3ng l\u01b0\u1ee3ng kh\u00e1ch gh\u00e9 th\u0103m c\u0169ng g\u00f3p ph\u1ea7n g\u00e2y ra l\u1ed7i n\u00e0y, nh\u01b0 v\u00e0o c\u00e1c d\u1ecbp sale l\u1ec5 h\u1ed9i. Trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p \u0111\u00f3, m\u00e1y ch\u1ee7 v\u1eabn k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c, nh\u01b0ng kh\u00f4ng \u0111\u1ee7 s\u1ee9c \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u c\u1ee7a qu\u00e1 nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng c\u00f9ng l\u00fac.<\/p>\n

C\u00e1c \u1ee9ng d\u1ee5ng web b\u1ecb c\u1ea5u h\u00ecnh sai c\u0169ng khi\u1ebfn l\u1ed7i 503 xu\u1ea5t hi\u1ec7n, v\u00ed d\u1ee5 nh\u01b0 m\u1ed9t plugin b\u1ecb xung \u0111\u1ed9t v\u1edbi h\u1ec7 th\u1ed1ng WordPress, hay l\u1ed7i DNS (c\u00f3 th\u1ec3 do m\u00e1y ch\u1ee7 c\u1ea5u h\u00ecnh sai ho\u1eb7c do ch\u00ednh b\u1ea3n th\u00e2n DNS).<\/p>\n

\"L\u1ed7i<\/p>\n

C\u00e1ch s\u1eeda l\u1ed7i HTTP error 503<\/h3>\n

Nh\u01b0 \u0111\u00e3 n\u00f3i \u1edf tr\u00ean, l\u00e0m m\u1edbi l\u1ea1i trang l\u00e0 c\u00e1ch nhanh nh\u1ea5t \u0111\u1ec3 kh\u00f4i ph\u1ee5c website (k\u1ebft h\u1ee3p c\u00f9ng\u2026c\u1ea7u nguy\u1ec7n n\u1eefa!). Tuy nhi\u00ean c\u00f2n c\u00f3 nhi\u1ec1u b\u01b0\u1edbc kh\u00e1c m\u00e0 b\u1ea1n c\u1ea7n th\u1ef1c hi\u1ec7n \u0111\u1ec3 ch\u1eafc ch\u1eafn v\u1ea5n \u0111\u1ec1 kh\u00f4ng ti\u1ebfp di\u1ec5n.<\/p>\n

B\u1ea1n c\u00f3 th\u1ec3 kh\u1edfi \u0111\u1ed9ng l\u1ea1i PC ho\u1eb7c router. C\u00f3 th\u1ec3 c\u1ea5u h\u00ecnh ph\u1ea7n c\u1ee9ng c\u1ee7a b\u1ea1n c\u00f3 v\u1ea5n \u0111\u1ec1 – l\u00fac n\u00e0y l\u1ed7i \u201cService Unavailable – DNS Failure\u201d s\u1ebd xu\u1ea5t hi\u1ec7n. C\u00e1ch kh\u1eafc ph\u1ee5c \u0111\u01a1n gi\u1ea3n \u0111\u1ebfn b\u1ea5t ng\u1edd l\u00e0 kh\u1edfi \u0111\u1ed9ng l\u1ea1i thi\u1ebft b\u1ecb.<\/p>\n

B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 ch\u1ecdn m\u1ed9t m\u00e1y ch\u1ee7 DNS kh\u00e1c n\u1ebfu ph\u00e1t hi\u1ec7n c\u00f3 v\u1ea5n \u0111\u1ec1 v\u1edbi m\u00e1y ch\u1ee7 DNS hi\u1ec7n t\u1ea1i.<\/p>\n

B\u1ea1n kh\u00f4ng th\u1ec3 l\u00e0m g\u00ec n\u1ebfu l\u1ed7i 503 xu\u1ea5t ph\u00e1t t\u1eeb ph\u00eda m\u00e1y ch\u1ee7. L\u00fac n\u00e0y tr\u00e1ch nhi\u1ec7m thu\u1ed9c v\u1ec1 c\u00e1c qu\u1ea3n tr\u1ecb vi\u00ean IT c\u1ee7a trang – h\u1ecd c\u1ea7n t\u00ecm l\u1ed7i v\u00e0 kh\u1eafc ph\u1ee5c ch\u00fang b\u1edfi ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 b\u1ef1c b\u1ed9i khi li\u00ean t\u1ee5c th\u1ea5y l\u1ed7i HTTP error 503. Gi\u1ea3 s\u1eed b\u1ea1n l\u00e0 qu\u1ea3n tr\u1ecb vi\u00ean IT v\u00e0 c\u1ea7n c\u00e0i \u0111\u1eb7t m\u1ed9t b\u1ea3n c\u1eadp nh\u1eadt kh\u1ea9n c\u1ea5p cho trang? H\u00e3y l\u00ean l\u1ecbch c\u1ee5 th\u1ec3, khi n\u00e0o l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp \u1edf m\u1ee9c th\u1ea5p, \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o kh\u00f4ng c\u00f3 qu\u00e1 nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng g\u1eb7p l\u1ed7i khi gh\u00e9 th\u0103m trang.<\/p>\n

N\u1ebfu website c\u1ee7a b\u1ea1n th\u01b0\u1eddng g\u1eb7p l\u1ed7i 503 khi l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp t\u0103ng cao, c\u00f3 ngh\u0129a l\u00e0 b\u1ea1n c\u1ea7n \u0111\u1ea7u t\u01b0 m\u1ea1nh h\u01a1n v\u00e0o t\u00e0i nguy\u00ean m\u00e1y ch\u1ee7 web \u0111ang d\u00f9ng.<\/p>\n

\u0110\u1ec3 ng\u0103n c\u00e1c s\u1ef1 c\u1ed1 trong t\u01b0\u01a1ng lai, b\u1ea1n c\u0169ng n\u00ean \u0111\u1ea7u t\u01b0 th\u00eam c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt v\u00e0 t\u0103ng t\u1ea7n su\u1ea5t c\u00e0i \u0111\u1eb7t c\u00e1c b\u1ea3n v\u00e1. B\u1ea3o v\u1ec7 tr\u01b0\u1edbc c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS l\u00e0 gi\u1ea3i ph\u00e1p \u0111\u01b0\u1ee3c r\u1ea5t nhi\u1ec1u nh\u00e0 cung c\u1ea5p host cung c\u1ea5p cho ng\u01b0\u1eddi d\u00f9ng, trong \u0111\u00f3 bao g\u1ed3m m\u1ed9t s\u1ed1 bi\u1ec7n ph\u00e1p nh\u01b0 ch\u1ec9 cho ph\u00e9p m\u1ed9t l\u01b0\u1ee3ng ng\u01b0\u1eddi d\u00f9ng nh\u1ea5t \u0111\u1ecbnh truy c\u1eadp trang v\u00e0o c\u00e1c th\u1eddi \u0111i\u1ec3m c\u1ee5 th\u1ec3.<\/p>\n

Cu\u1ed1i c\u00f9ng, n\u1ebfu l\u1ed7i 503 xu\u1ea5t ph\u00e1t t\u1eeb l\u1ed7i l\u1eadp tr\u00ecnh, b\u1ea1n s\u1ebd c\u1ea7n nghi\u00ean c\u1ee9u k\u1ef9 h\u01a1n n\u1eefa \u0111\u1ec3 t\u00ecm ra ngu\u1ed3n g\u1ed1c v\u00e0 gi\u1ea3i quy\u1ebft tri\u1ec7t \u0111\u1ec3 n\u00f3.<\/p>\n

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MiraWEB – T\u1ea1o website t\u1ef1 \u0111\u1ed9ng b\u1eb1ng AI trong 30 gi\u00e2y<\/span><\/h3>\n
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