{"id":469315,"date":"2023-05-31T00:00:00","date_gmt":"2023-05-31T00:00:00","guid":{"rendered":"https:\/\/proxycompass.com\/proxy-strategies-for-parsing-websites-using-cloudflare-a-comprehensive-guide\/"},"modified":"2024-03-04T06:05:11","modified_gmt":"2024-03-04T06:05:11","slug":"proxy-strategies-for-parsing-websites-using-cloudflare-a-comprehensive-guide","status":"publish","type":"post","link":"https:\/\/proxycompass.com\/vi\/proxy-strategies-for-parsing-websites-using-cloudflare-a-comprehensive-guide\/","title":{"rendered":"Chi\u1ebfn l\u01b0\u1ee3c proxy \u0111\u1ec3 ph\u00e2n t\u00edch trang web b\u1eb1ng Cloudflare: H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n"},"content":{"rendered":"<h2>Gi\u1edbi thi\u1ec7u v\u1ec1 Web Scraping v\u00e0 Proxy<\/h2>\n<p>Trong th\u1eddi \u0111\u1ea1i th\u00f4ng tin, d\u1eef li\u1ec7u \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t lo\u1ea1i ti\u1ec1n t\u1ec7 quan tr\u1ecdng, th\u00fac \u0111\u1ea9y c\u00e1c chi\u1ebfn l\u01b0\u1ee3c kinh doanh v\u00e0 qu\u00e1 tr\u00ecnh ra quy\u1ebft \u0111\u1ecbnh trong c\u00e1c ng\u00e0nh. R\u1ea5t nhi\u1ec1u d\u1eef li\u1ec7u c\u00f3 th\u1ec3 truy c\u1eadp d\u1ec5 d\u00e0ng tr\u00ean internet, nh\u01b0ng vi\u1ec7c tr\u00edch xu\u1ea5t n\u00f3 \u1edf \u0111\u1ecbnh d\u1ea1ng c\u00f3 c\u1ea5u tr\u00fac v\u00e0 h\u1eefu \u00edch c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t th\u00e1ch th\u1ee9c. \u0110\u00e2y l\u00e0 l\u00fac vi\u1ec7c qu\u00e9t web ph\u00e1t huy t\u00e1c d\u1ee5ng.<\/p>\n<h3>Qu\u00e9t web: T\u1ed5ng quan<\/h3>\n<p>Qu\u00e9t web l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p t\u1ef1 \u0111\u1ed9ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 tr\u00edch xu\u1ea5t l\u01b0\u1ee3ng l\u1edbn d\u1eef li\u1ec7u t\u1eeb c\u00e1c trang web m\u1ed9t c\u00e1ch nhanh ch\u00f3ng. M\u1eb7c d\u00f9 internet l\u00e0 m\u1ed9t ngu\u1ed3n d\u1eef li\u1ec7u kh\u1ed5ng l\u1ed3 nh\u01b0ng d\u1eef li\u1ec7u th\u01b0\u1eddng kh\u00f4ng c\u00f3 c\u1ea5u tr\u00fac. Qu\u00e9t web cho ph\u00e9p ch\u00fang t\u00f4i chuy\u1ec3n \u0111\u1ed5i nh\u1eefng d\u1eef li\u1ec7u n\u00e0y th\u00e0nh d\u1ea1ng c\u00f3 c\u1ea5u tr\u00fac.<\/p>\n<p>Qu\u00e9t web li\u00ean quan \u0111\u1ebfn vi\u1ec7c t\u00ecm n\u1ea1p m\u1ed9t trang web v\u00e0 sau \u0111\u00f3 tr\u00edch xu\u1ea5t th\u00f4ng tin c\u00f3 \u00fd ngh\u0129a t\u1eeb n\u00f3. D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c tr\u00edch xu\u1ea5t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u01b0u trong m\u00e1y t\u00ednh c\u1ee5c b\u1ed9 c\u1ee7a b\u1ea1n ho\u1eb7c v\u00e0o c\u01a1 s\u1edf d\u1eef li\u1ec7u \u1edf \u0111\u1ecbnh d\u1ea1ng b\u1ea3ng, t\u00f9y thu\u1ed9c v\u00e0o nhu c\u1ea7u c\u1ee7a b\u1ea1n. N\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau nh\u01b0 khai th\u00e1c d\u1eef li\u1ec7u, ph\u00e2n t\u00edch d\u1eef li\u1ec7u, so s\u00e1nh gi\u00e1, ph\u00e2n t\u00edch c\u1ea3m t\u00ednh, danh s\u00e1ch vi\u1ec7c l\u00e0m, v.v.<\/p>\n<h3>Vai tr\u00f2 c\u1ee7a proxy trong vi\u1ec7c qu\u00e9t web<\/h3>\n<p>Trong qu\u00e1 tr\u00ecnh qu\u00e9t web, m\u1ed9t trong nh\u1eefng th\u00e1ch th\u1ee9c m\u00e0 c\u00e1c nh\u00e0 khoa h\u1ecdc v\u00e0 k\u1ef9 s\u01b0 d\u1eef li\u1ec7u th\u01b0\u1eddng g\u1eb7p ph\u1ea3i l\u00e0 x\u1eed l\u00fd c\u00e1c h\u1ea1n ch\u1ebf do c\u00e1c trang web \u0111\u01b0a ra. Nhi\u1ec1u trang web gi\u1edbi h\u1ea1n l\u01b0\u1ee3ng d\u1eef li\u1ec7u m\u00e0 ng\u01b0\u1eddi d\u00f9ng (ho\u1eb7c bot) c\u00f3 th\u1ec3 truy c\u1eadp, ch\u1eb7n nh\u1eefng IP \u0111\u01b0a ra qu\u00e1 nhi\u1ec1u y\u00eau c\u1ea7u trong th\u1eddi gian ng\u1eafn. \u0110\u00e2y l\u00e0 n\u01a1i proxy tr\u1edf n\u00ean v\u00f4 gi\u00e1.<\/p>\n<p>M\u00e1y ch\u1ee7 proxy ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t trung gian gi\u1eefa ng\u01b0\u1eddi d\u00f9ng v\u00e0 internet. N\u00f3 che d\u1ea5u \u0111\u1ecba ch\u1ec9 IP c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 s\u1eed d\u1ee5ng \u0111\u1ecba ch\u1ec9 IP c\u1ee7a ch\u00ednh n\u00f3 \u0111\u1ec3 y\u00eau c\u1ea7u d\u1eef li\u1ec7u t\u1eeb m\u00e1y ch\u1ee7, khi\u1ebfn ng\u01b0\u1eddi d\u00f9ng c\u00f3 v\u1ebb \u1ea9n danh v\u00e0 do \u0111\u00f3 b\u1ecf qua c\u00e1c h\u1ea1n ch\u1ebf. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng trong vi\u1ec7c qu\u00e9t web, n\u01a1i th\u01b0\u1eddng xuy\u00ean \u0111\u01b0a ra s\u1ed1 l\u01b0\u1ee3ng y\u00eau c\u1ea7u cao.<\/p>\n<h3>C\u00e1c lo\u1ea1i proxy: Trung t\u00e2m d\u1eef li\u1ec7u, proxy d\u00e2n c\u01b0 v\u00e0 proxy di \u0111\u1ed9ng<\/h3>\n<p>C\u00f3 ba lo\u1ea1i proxy ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong qu\u00e1 tr\u00ecnh qu\u00e9t web: Proxy trung t\u00e2m d\u1eef li\u1ec7u, Proxy d\u00e2n c\u01b0 v\u00e0 Proxy di \u0111\u1ed9ng.<\/p>\n<ul>\n<li><a href=\"https:\/\/fineproxy.de\/en\/knowledge-base\/what-are-data-center-proxies\/\" target=\"_blank\" rel=\"noopener\"><strong>Proxy trung t\u00e2m d\u1eef li\u1ec7u<\/strong><\/a> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i do t\u1ed1c \u0111\u1ed9 v\u00e0 gi\u00e1 c\u1ea3 ph\u1ea3i ch\u0103ng. C\u00e1c proxy n\u00e0y kh\u00f4ng li\u00ean k\u1ebft v\u1edbi Nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 Internet (ISP) m\u00e0 c\u00f3 ngu\u1ed3n g\u1ed1c t\u1eeb m\u1ed9t c\u00f4ng ty th\u1ee9 c\u1ea5p, khi\u1ebfn ch\u00fang k\u00e9m tin c\u1eady h\u01a1n v\u1ec1 m\u1eb7t \u0111\u1ecba ch\u1ec9 IP tr\u00f4ng &#039;th\u1eadt&#039; \u0111\u1ed1i v\u1edbi m\u00e1y ch\u1ee7.<\/li>\n<li><a href=\"https:\/\/fineproxy.de\/en\/knowledge-base\/what-are-residential-proxies\/\" target=\"_blank\" rel=\"noopener\"><strong>\u1ee6y quy\u1ec1n d\u00e2n c\u01b0<\/strong><\/a>m\u1eb7t kh\u00e1c, \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi m\u1ed9t ISP h\u1ee3p ph\u00e1p v\u00e0 do \u0111\u00f3, ch\u00fang xu\u1ea5t hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng \u0111\u1ecba ch\u1ec9 IP th\u1ef1c. Ch\u00fang \u0111\u00e1ng tin c\u1eady h\u01a1n nh\u01b0ng ch\u1eadm h\u01a1n v\u00e0 \u0111\u1eaft h\u01a1n so v\u1edbi proxy c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u.<\/li>\n<li><a href=\"https:\/\/fineproxy.de\/en\/knowledge-base\/what-are-mobile-proxies\/\" target=\"_blank\" rel=\"noopener\"><strong>Proxy di \u0111\u1ed9ng<\/strong><\/a> s\u1eed d\u1ee5ng \u0111\u1ecba ch\u1ec9 IP do c\u00e1c nh\u00e0 khai th\u00e1c internet di \u0111\u1ed9ng g\u00e1n cho thi\u1ebft b\u1ecb di \u0111\u1ed9ng, khi\u1ebfn ch\u00fang c\u00f3 \u0111\u1ed9 tin c\u1eady cao. Tuy nhi\u00ean, ch\u00fang \u0111\u1eaft nh\u1ea5t v\u00e0 ch\u1eadm nh\u1ea5t trong ba lo\u1ea1i.<\/li>\n<\/ul>\n<p>Hi\u1ec3u vai tr\u00f2 v\u00e0 c\u00e1ch s\u1eed d\u1ee5ng c\u1ee7a t\u1eebng lo\u1ea1i proxy l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 qu\u00e9t web hi\u1ec7u qu\u1ea3. Vi\u1ec7c l\u1ef1a ch\u1ecdn gi\u1eefa trung t\u00e2m d\u1eef li\u1ec7u, proxy d\u00e2n c\u01b0 ho\u1eb7c proxy di \u0111\u1ed9ng t\u00f9y thu\u1ed9c v\u00e0o c\u00e1c y\u00eau c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a d\u1ef1 \u00e1n qu\u00e9t web, trang web m\u1ee5c ti\u00eau v\u00e0 ng\u00e2n s\u00e1ch c\u1ee7a b\u1ea1n.<\/p>\n<p>&nbsp;<\/p>\n<h2>\u0110i s\u00e2u v\u00e0o Cloudflare<\/h2>\n<p>Khi ch\u00fang ta b\u1eaft \u0111\u1ea7u h\u00e0nh tr\u00ecnh hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 qu\u00e9t web, \u0111i\u1ec1u c\u1ea7n thi\u1ebft l\u00e0 ph\u1ea3i \u0111i s\u00e2u v\u00e0o m\u1ed9t trong nh\u1eefng th\u00e1ch th\u1ee9c quan tr\u1ecdng trong l\u0129nh v\u1ef1c n\u00e0y \u2013 c\u00e1c trang web \u0111\u01b0\u1ee3c Cloudflare b\u1ea3o v\u1ec7.<\/p>\n<h3>Cloudflare l\u00e0 g\u00ec?<\/h3>\n<p><a href=\"https:\/\/www.cloudflare.com\/\" target=\"_blank\" rel=\"noopener\">Cloudflare, Inc.<\/a> l\u00e0 c\u00f4ng ty c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng web v\u00e0 b\u1ea3o m\u1eadt trang web, cung c\u1ea5p d\u1ecbch v\u1ee5 m\u1ea1ng ph\u00e2n ph\u1ed1i n\u1ed9i dung (CDN), gi\u1ea3m thi\u1ec3u DDoS, b\u1ea3o m\u1eadt Internet v\u00e0 d\u1ecbch v\u1ee5 m\u00e1y ch\u1ee7 t\u00ean mi\u1ec1n ph\u00e2n t\u00e1n. V\u1ec1 c\u01a1 b\u1ea3n, c\u00e1c d\u1ecbch v\u1ee5 c\u1ee7a Cloudflare n\u1eb1m gi\u1eefa kh\u00e1ch truy c\u1eadp trang web v\u00e0 nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 l\u01b0u tr\u1eef c\u1ee7a ng\u01b0\u1eddi d\u00f9ng Cloudflare, ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t proxy ng\u01b0\u1ee3c cho c\u00e1c trang web.<\/p>\n<p>V\u1edbi s\u1ee9 m\u1ec7nh quan tr\u1ecdng l\u00e0 gi\u00fap x\u00e2y d\u1ef1ng m\u1ed9t Internet t\u1ed1t h\u01a1n, Cloudflare cam k\u1ebft \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u trang web \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 an to\u00e0n. Tuy nhi\u00ean, cam k\u1ebft n\u00e0y c\u00f3 th\u1ec3 g\u00e2y tr\u1edf ng\u1ea1i cho nh\u1eefng ai mu\u1ed1n tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u t\u1eeb c\u00e1c trang web s\u1eed d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt c\u1ee7a Cloudflare.<\/p>\n<h3>Cloudflare ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n<p>Ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Cloudflare g\u1ed3m hai ph\u1ea7n: n\u00f3 t\u0103ng t\u1ed1c ph\u00e2n ph\u1ed1i n\u1ed9i dung qua CDN v\u00e0 b\u1ea3o v\u1ec7 c\u00e1c trang web th\u00f4ng qua c\u00e1c d\u1ecbch v\u1ee5 b\u1ea3o m\u1eadt m\u1ea1nh m\u1ebd.<\/p>\n<p>L\u00e0 m\u1ed9t CDN, Cloudflare sao ch\u00e9p d\u1eef li\u1ec7u c\u1ee7a trang web v\u00e0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u \u0111\u00f3 tr\u00ean m\u1ea1ng m\u00e1y ch\u1ee7 to\u00e0n c\u1ea7u. Khi ng\u01b0\u1eddi d\u00f9ng y\u00eau c\u1ea7u d\u1eef li\u1ec7u, d\u1eef li\u1ec7u s\u1ebd \u0111\u01b0\u1ee3c g\u1eedi t\u1eeb m\u00e1y ch\u1ee7 g\u1ea7n nh\u1ea5t, gi\u00fap t\u0103ng t\u1ed1c \u0111\u1ed9 ph\u00e2n ph\u1ed1i n\u1ed9i dung. Vi\u1ec7c t\u1ed1i \u01b0u h\u00f3a n\u00e0y g\u00f3p ph\u1ea7n \u0111\u00e1ng k\u1ec3 v\u00e0o vi\u1ec7c n\u00e2ng cao tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng, gi\u1ea3m m\u1ee9c s\u1eed d\u1ee5ng b\u0103ng th\u00f4ng v\u00e0 c\u1ea3i thi\u1ec7n th\u1eddi gian t\u1ea3i trang web.<\/p>\n<p>V\u1ec1 m\u1eb7t b\u1ea3o m\u1eadt, Cloudflare \u0111\u00f3ng vai tr\u00f2 l\u00e0 l\u00e1 ch\u1eafn b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i c\u00e1c ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed9c h\u1ea1i, bao g\u1ed3m c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng DDoS, bot \u0111\u1ed9c h\u1ea1i v\u00e0 vi ph\u1ea1m d\u1eef li\u1ec7u. N\u00f3 che gi\u1ea5u \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u00e1y ch\u1ee7 g\u1ed1c, khi\u1ebfn nh\u1eefng k\u1ebb t\u1ea5n c\u00f4ng ti\u1ec1m n\u0103ng kh\u00f3 x\u00e1c \u0111\u1ecbnh v\u00e0 nh\u1eafm m\u1ee5c ti\u00eau v\u00e0o n\u00f3. Cloudflare c\u0169ng ph\u00e2n t\u00edch l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp \u0111\u1ebfn, ch\u1eb7n m\u1ecdi y\u00eau c\u1ea7u c\u00f3 v\u1ebb c\u00f3 h\u1ea1i.<\/p>\n<h3>C\u00e1c bi\u1ec7n ph\u00e1p v\u00e0 th\u00e1ch th\u1ee9c ch\u1ed1ng bot c\u1ee7a Cloudflare \u0111\u1ed1i v\u1edbi vi\u1ec7c qu\u00e9t web<\/h3>\n<p>M\u1ed9t kh\u00eda c\u1ea1nh quan tr\u1ecdng trong c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 c\u1ee7a Cloudflare l\u00e0 h\u1ec7 th\u1ed1ng ch\u1ed1ng bot tinh vi. C\u00e1c h\u1ec7 th\u1ed1ng n\u00e0y nh\u1eb1m m\u1ee5c \u0111\u00edch ph\u00e2n bi\u1ec7t gi\u1eefa l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp c\u1ee7a con ng\u01b0\u1eddi v\u00e0 bot, cho ph\u00e9p l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp tr\u01b0\u1edbc v\u00e0 ch\u1eb7n l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp sau.<\/p>\n<p>Cloudflare s\u1eed d\u1ee5ng nhi\u1ec1u k\u1ef9 thu\u1eadt kh\u00e1c nhau \u0111\u1ec3 ng\u0103n ch\u1eb7n bot:<\/p>\n<ol>\n<li><strong>Th\u1eed th\u00e1ch JavaScript<\/strong>: M\u1ed9t \u0111o\u1ea1n m\u00e3 JavaScript nh\u1ecf \u0111\u01b0\u1ee3c g\u1eedi t\u1edbi tr\u00ecnh duy\u1ec7t c\u1ee7a ng\u01b0\u1eddi d\u00f9ng \u0111\u1ec3 th\u1ef1c thi. V\u00ec c\u00e1c bot th\u01b0\u1eddng thi\u1ebfu kh\u1ea3 n\u0103ng di\u1ec5n gi\u1ea3i JavaScript n\u00ean ch\u00fang kh\u00f4ng ph\u1ea3n h\u1ed3i ch\u00ednh x\u00e1c, d\u1eabn \u0111\u1ebfn vi\u1ec7c nh\u1eadn d\u1ea1ng v\u00e0 ch\u1eb7n sau \u0111\u00f3.<\/li>\n<li><strong>Th\u1eed th\u00e1ch CAPTCHA<\/strong>: CAPTCHA l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 ph\u1ed5 bi\u1ebfn kh\u00e1c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e2n bi\u1ec7t gi\u1eefa con ng\u01b0\u1eddi v\u00e0 bot. N\u00f3 li\u00ean quan \u0111\u1ebfn m\u1ed9t b\u00e0i ki\u1ec3m tra m\u00e0 con ng\u01b0\u1eddi c\u00f3 th\u1ec3 v\u01b0\u1ee3t qua nh\u01b0ng n\u00f3i chung bot th\u00ec kh\u00f4ng th\u1ec3, ch\u1eb3ng h\u1ea1n nh\u01b0 x\u00e1c \u0111\u1ecbnh c\u00e1c h\u00ecnh \u1ea3nh c\u1ee5 th\u1ec3 t\u1eeb m\u1ed9t b\u1ed9 s\u01b0u t\u1eadp.<\/li>\n<li><strong>Ki\u1ec3m tra t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a tr\u00ecnh duy\u1ec7t<\/strong>: \u0110i\u1ec1u n\u00e0y li\u00ean quan \u0111\u1ebfn vi\u1ec7c ki\u1ec3m tra c\u00e1c ti\u00eau \u0111\u1ec1 HTTP \u0111\u01b0\u1ee3c tr\u00ecnh duy\u1ec7t g\u1eedi \u0111\u1ec3 t\u00ecm c\u00e1c t\u1ea3i tr\u1ecdng \u0111\u1ed9c h\u1ea1i ho\u1eb7c c\u00e1c \u0111i\u1ec3m b\u1ea5t th\u01b0\u1eddng, ch\u1eb7n c\u00e1c y\u00eau c\u1ea7u c\u00f3 ti\u00eau \u0111\u1ec1 \u0111\u00e1ng ng\u1edd.<\/li>\n<\/ol>\n<p>C\u00e1c bi\u1ec7n ph\u00e1p ch\u1ed1ng bot n\u00e0y c\u00f3 th\u1ec3 l\u00e0 tr\u1edf ng\u1ea1i \u0111\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi qu\u00e9t web, x\u00e9t cho c\u00f9ng th\u00ec ch\u00fang c\u0169ng l\u00e0 bot. Th\u00e1ch th\u1ee9c kh\u00f4ng ch\u1ec9 n\u1eb1m \u1edf vi\u1ec7c truy c\u1eadp d\u1eef li\u1ec7u m\u00e0 c\u00f2n \u1edf vi\u1ec7c l\u00e0m nh\u01b0 v\u1eady m\u00e0 kh\u00f4ng b\u1ecb ph\u00e1t hi\u1ec7n v\u00e0 ch\u1eb7n.<\/p>\n<p>&nbsp;<\/p>\n<h2>T\u1ea7m quan tr\u1ecdng c\u1ee7a proxy trung t\u00e2m d\u1eef li\u1ec7u trong vi\u1ec7c qu\u00e9t web<\/h2>\n<p>Sau khi th\u1ea3o lu\u1eadn v\u1ec1 nh\u1eefng th\u00e1ch th\u1ee9c do c\u00e1c trang web \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1edfi Cloudflare \u0111\u1eb7t ra, r\u00f5 r\u00e0ng r\u1eb1ng vi\u1ec7c v\u01b0\u1ee3t qua nh\u1eefng tr\u1edf ng\u1ea1i n\u00e0y \u0111\u00f2i h\u1ecfi ph\u1ea3i c\u00f3 c\u00e1c c\u00f4ng c\u1ee5 v\u00e0 ph\u01b0\u01a1ng ph\u00e1p chi\u1ebfn l\u01b0\u1ee3c. M\u1ed9t trong nh\u1eefng c\u00f4ng c\u1ee5 hi\u1ec7u qu\u1ea3 nh\u1ea5t cho m\u1ee5c \u0111\u00edch n\u00e0y l\u00e0 proxy, c\u1ee5 th\u1ec3 l\u00e0 proxy trung t\u00e2m d\u1eef li\u1ec7u.<\/p>\n<h3>Proxy trung t\u00e2m d\u1eef li\u1ec7u l\u00e0 g\u00ec?<\/h3>\n<p>Proxy trung t\u00e2m d\u1eef li\u1ec7u l\u00e0 lo\u1ea1i proxy ph\u1ed5 bi\u1ebfn kh\u00f4ng \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 internet (ISP). Ch\u00fang c\u00f3 ngu\u1ed3n g\u1ed1c t\u1eeb m\u1ed9t t\u1eadp \u0111o\u00e0n th\u1ee9 c\u1ea5p ho\u1eb7c trung t\u00e2m d\u1eef li\u1ec7u, khi\u1ebfn ch\u00fang \u0111\u1ed9c l\u1eadp v\u1edbi b\u1ea5t k\u1ef3 v\u1ecb tr\u00ed \u0111\u1ecba l\u00fd c\u1ee5 th\u1ec3 n\u00e0o. Ch\u00fang cho ph\u00e9p b\u1ea1n che gi\u1ea5u \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u00ecnh v\u00e0 s\u1eed d\u1ee5ng m\u1ed9t \u0111\u1ecba ch\u1ec9 ho\u00e0n to\u00e0n kh\u00e1c, mang l\u1ea1i m\u1ee9c \u0111\u1ed9 \u1ea9n danh khi truy c\u1eadp d\u1eef li\u1ec7u tr\u00ean internet.<\/p>\n<p>Proxy trung t\u00e2m d\u1eef li\u1ec7u c\u00f3 c\u00e1c bi\u1ebfn th\u1ec3 d\u00f9ng chung v\u00e0 chuy\u00ean d\u1ee5ng. Proxy d\u00f9ng chung \u0111\u01b0\u1ee3c nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng s\u1eed d\u1ee5ng \u0111\u1ed3ng th\u1eddi, khi\u1ebfn ch\u00fang r\u1ebb h\u01a1n nh\u01b0ng c\u00f3 th\u1ec3 ch\u1eadm h\u01a1n do l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp. M\u1eb7t kh\u00e1c, proxy chuy\u00ean d\u1ee5ng ho\u1eb7c proxy ri\u00eang ch\u1ec9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng b\u1edfi m\u1ed9t ng\u01b0\u1eddi d\u00f9ng, mang l\u1ea1i hi\u1ec7u su\u1ea5t v\u01b0\u1ee3t tr\u1ed9i nh\u01b0ng v\u1edbi chi ph\u00ed cao h\u01a1n.<\/p>\n<h3>\u01afu \u0111i\u1ec3m c\u1ee7a vi\u1ec7c s\u1eed d\u1ee5ng proxy trung t\u00e2m d\u1eef li\u1ec7u<\/h3>\n<p>Proxy c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u c\u00f3 r\u1ea5t nhi\u1ec1u l\u1ee3i \u00edch khi\u1ebfn ch\u00fang tr\u1edf n\u00ean l\u00fd t\u01b0\u1edfng cho vi\u1ec7c qu\u00e9t web:<\/p>\n<ul>\n<li><strong>T\u1ed1c \u0111\u1ed9<\/strong>: Proxy c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u1edbi t\u1ed1c \u0111\u1ed9 c\u1ee7a ch\u00fang. V\u00ec ch\u00fang \u0111\u01b0\u1ee3c \u0111\u1eb7t trong c\u00e1c trung t\u00e2m d\u1eef li\u1ec7u c\u00f3 m\u00e1y ch\u1ee7 m\u1ea1nh m\u1ebd n\u00ean ch\u00fang c\u00f3 th\u1ec3 x\u1eed l\u00fd m\u1ed9t l\u01b0\u1ee3ng l\u1edbn d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch nhanh ch\u00f3ng, \u0111i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng trong vi\u1ec7c qu\u00e9t web.<\/li>\n<li><strong>\u1ea9n danh<\/strong>: Proxy c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u cung c\u1ea5p m\u1ee9c \u0111\u1ed9 \u1ea9n danh \u0111\u00e1ng k\u1ec3. Ch\u00fang cho ph\u00e9p b\u1ea1n \u1ea9n \u0111\u1ecba ch\u1ec9 IP ban \u0111\u1ea7u c\u1ee7a m\u00ecnh v\u00e0 s\u1eed d\u1ee5ng \u0111\u1ecba ch\u1ec9 IP thay th\u1ebf, khi\u1ebfn c\u00e1c trang web kh\u00f3 theo d\u00f5i ho\u1ea1t \u0111\u1ed9ng c\u1ee7a b\u1ea1n h\u01a1n.<\/li>\n<li><strong>Kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng<\/strong>: N\u1ebfu b\u1ea1n \u0111ang th\u1ef1c hi\u1ec7n c\u00e1c ho\u1ea1t \u0111\u1ed9ng thu th\u1eadp d\u1eef li\u1ec7u quy m\u00f4 l\u1edbn, proxy c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn tuy\u1ec7t v\u1eddi do kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng c\u1ee7a ch\u00fang. B\u1ea1n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng s\u1eed d\u1ee5ng \u0111\u1ed3ng th\u1eddi h\u00e0ng tr\u0103m ho\u1eb7c th\u1eadm ch\u00ed h\u00e0ng ngh\u00ecn proxy n\u00e0y.<\/li>\n<li><strong>Hi\u1ec7u qu\u1ea3 chi ph\u00ed<\/strong>: So v\u1edbi proxy d\u00e2n d\u1ee5ng ho\u1eb7c proxy di \u0111\u1ed9ng, proxy trung t\u00e2m d\u1eef li\u1ec7u c\u00f3 gi\u00e1 c\u1ea3 ph\u1ea3i ch\u0103ng h\u01a1n. T\u00ednh hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed c\u1ee7a ch\u00fang khi\u1ebfn ch\u00fang tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn ph\u00f9 h\u1ee3p cho nhi\u1ec1u doanh nghi\u1ec7p v\u00e0 c\u00e1 nh\u00e2n tham gia qu\u00e9t web.<\/li>\n<\/ul>\n<h3>Nh\u1eefng th\u00e1ch th\u1ee9c v\u00e0 gi\u1ea3i ph\u00e1p ti\u1ec1m n\u0103ng<\/h3>\n<p>M\u1eb7c d\u00f9 proxy c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u mang l\u1ea1i v\u00f4 s\u1ed1 l\u1ee3i \u00edch nh\u01b0ng ch\u00fang c\u0169ng c\u00f3 th\u1ec3 \u0111\u1eb7t ra m\u1ed9t s\u1ed1 th\u00e1ch th\u1ee9c nh\u1ea5t \u0111\u1ecbnh:<\/p>\n<ul>\n<li><strong>Ph\u00e1t hi\u1ec7n<\/strong>: M\u1ed9t s\u1ed1 trang web c\u00f3 th\u1ec3 c\u00f3 xu h\u01b0\u1edbng ch\u1eb7n proxy c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u h\u01a1n v\u00ec h\u1ecd bi\u1ebft nh\u1eefng \u0111\u1ecba ch\u1ec9 IP n\u00e0y thu\u1ed9c v\u1ec1 m\u1ed9t trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 c\u00f3 th\u1ec3 kh\u00f4ng ph\u1ea3i l\u00e0 ng\u01b0\u1eddi d\u00f9ng th\u00f4ng th\u01b0\u1eddng.<\/li>\n<li><strong>Danh ti\u1ebfng \u0111\u01b0\u1ee3c chia s\u1ebb<\/strong>: N\u1ebfu \u0111ang s\u1eed d\u1ee5ng proxy trung t\u00e2m d\u1eef li\u1ec7u d\u00f9ng chung, b\u1ea1n c\u00f3 th\u1ec3 g\u1eb7p ph\u1ea3i th\u00e1ch th\u1ee9c do ho\u1ea1t \u0111\u1ed9ng c\u1ee7a nh\u1eefng ng\u01b0\u1eddi d\u00f9ng kh\u00e1c. N\u1ebfu m\u1ed9t ng\u01b0\u1eddi d\u00f9ng b\u1ecb c\u1ea5m \u0111\u1ecba ch\u1ec9 IP, \u0111i\u1ec1u \u0111\u00f3 s\u1ebd \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn nh\u1eefng ng\u01b0\u1eddi d\u00f9ng chung proxy \u0111\u00f3.<\/li>\n<\/ul>\n<p>Tuy nhi\u00ean, nh\u1eefng th\u00e1ch th\u1ee9c n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c nh\u00e0 cung c\u1ea5p proxy c\u00f3 uy t\u00edn, nh\u1eefng ng\u01b0\u1eddi cung c\u1ea5p proxy trung t\u00e2m d\u1eef li\u1ec7u ch\u1ea5t l\u01b0\u1ee3ng cao v\u00e0 li\u00ean t\u1ee5c l\u00e0m m\u1edbi nh\u00f3m IP c\u1ee7a h\u1ecd. Ngo\u00e0i ra, vi\u1ec7c ch\u1ecdn proxy trung t\u00e2m d\u1eef li\u1ec7u chuy\u00ean d\u1ee5ng c\u00f3 th\u1ec3 gi\u00fap tr\u00e1nh \u0111\u01b0\u1ee3c v\u1ea5n \u0111\u1ec1 danh ti\u1ebfng chung.<\/p>\n<p>T\u00f3m l\u1ea1i, khi n\u00f3i \u0111\u1ebfn vi\u1ec7c qu\u00e9t web, \u0111\u1eb7c bi\u1ec7t l\u00e0 t\u1eeb c\u00e1c trang web \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1edfi Cloudflare, proxy c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u \u0111\u00f3ng m\u1ed9t vai tr\u00f2 then ch\u1ed1t. Ch\u00fang cung c\u1ea5p s\u1ef1 c\u00e2n b\u1eb1ng v\u1ec1 t\u1ed1c \u0111\u1ed9, t\u00ednh \u1ea9n danh, kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u00e0 hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed, khi\u1ebfn ch\u00fang tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn c\u1ee7a nh\u1eefng ng\u01b0\u1eddi qu\u00e9t web. Trong c\u00e1c ph\u1ea7n sau, ch\u00fang t\u00f4i s\u1ebd \u0111i s\u00e2u v\u00e0o c\u00e1c chi\u1ebfn l\u01b0\u1ee3c v\u00e0 th\u1ef1c ti\u1ec5n c\u1ee5 th\u1ec3 \u0111\u1ec3 s\u1eed d\u1ee5ng c\u00e1c proxy n\u00e0y m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 nh\u1eb1m ph\u00e2n t\u00edch c\u00e1c trang web \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1edfi Cloudflare.<\/p>\n<p>&nbsp;<\/p>\n<h2>C\u00e1c chi\u1ebfn l\u01b0\u1ee3c ph\u00e2n t\u00edch c\u00fa ph\u00e1p trang web \u0111\u01b0\u1ee3c Cloudflare b\u1ea3o v\u1ec7 b\u1eb1ng proxy<\/h2>\n<p>B\u00e2y gi\u1edd ch\u00fang ta \u0111\u00e3 hi\u1ec3u vai tr\u00f2 quan tr\u1ecdng c\u1ee7a proxy trung t\u00e2m d\u1eef li\u1ec7u trong vi\u1ec7c qu\u00e9t web, h\u00e3y \u0111i s\u00e2u v\u00e0o c\u00e1c chi\u1ebfn l\u01b0\u1ee3c c\u1ee5 th\u1ec3 \u0111\u1ec3 ph\u00e2n t\u00edch c\u00fa ph\u00e1p c\u00e1c trang web \u0111\u01b0\u1ee3c Cloudflare b\u1ea3o v\u1ec7 b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c proxy n\u00e0y.<\/p>\n<h3>Xoay IP v\u00e0 gi\u1edbi h\u1ea1n t\u1ed1c \u0111\u1ed9<\/h3>\n<p>Qu\u00e9t web th\u01b0\u1eddng li\u00ean quan \u0111\u1ebfn vi\u1ec7c g\u1eedi m\u1ed9t s\u1ed1 l\u01b0\u1ee3ng l\u1edbn y\u00eau c\u1ea7u \u0111\u1ebfn m\u1ed9t trang web trong m\u1ed9t kho\u1ea3ng th\u1eddi gian ng\u1eafn, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 k\u00edch ho\u1ea1t c\u00e1c bi\u1ec7n ph\u00e1p ch\u1ed1ng bot. \u0110\u1ec3 tr\u00e1nh b\u1ecb ph\u00e1t hi\u1ec7n, hai ph\u01b0\u01a1ng ph\u00e1p quan tr\u1ecdng l\u00e0 xoay v\u00f2ng IP v\u00e0 gi\u1edbi h\u1ea1n t\u1ed1c \u0111\u1ed9.<\/p>\n<p>Xoay v\u00f2ng IP li\u00ean quan \u0111\u1ebfn vi\u1ec7c thay \u0111\u1ed5i \u0111\u1ecba ch\u1ec9 IP \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 g\u1eedi y\u00eau c\u1ea7u theo \u0111\u1ecbnh k\u1ef3. V\u1edbi m\u1ed9t nh\u00f3m proxy trung t\u00e2m d\u1eef li\u1ec7u, b\u1ea1n c\u00f3 th\u1ec3 xoay \u0111\u1ecba ch\u1ec9 IP cho m\u1ecdi y\u00eau c\u1ea7u ho\u1eb7c sau m\u1ed9t kho\u1ea3ng th\u1eddi gian nh\u1ea5t \u0111\u1ecbnh. \u0110i\u1ec1u n\u00e0y khi\u1ebfn trang web kh\u00f3 ph\u00e1t hi\u1ec7n ho\u1ea1t \u0111\u1ed9ng thu th\u1eadp d\u1eef li\u1ec7u h\u01a1n.<\/p>\n<p>M\u1eb7t kh\u00e1c, gi\u1edbi h\u1ea1n t\u1ef7 l\u1ec7 li\u00ean quan \u0111\u1ebfn vi\u1ec7c ki\u1ec3m so\u00e1t t\u1ea7n su\u1ea5t y\u00eau c\u1ea7u c\u1ee7a b\u1ea1n. Thay v\u00ec g\u1eedi c\u00e1c y\u00eau c\u1ea7u \u0111\u1ebfn m\u00e1y ch\u1ee7, h\u00e3y s\u1eafp x\u1ebfp ch\u00fang \u0111\u1ec3 b\u1eaft ch\u01b0\u1edbc h\u00e0nh vi duy\u1ec7t web c\u1ee7a con ng\u01b0\u1eddi.<\/p>\n<h3>Gi\u1ea3 l\u1eadp tr\u00ecnh duy\u1ec7t v\u00e0 gi\u1ea3 m\u1ea1o t\u00e1c nh\u00e2n ng\u01b0\u1eddi d\u00f9ng<\/h3>\n<p>M\u00f4 ph\u1ecfng tr\u00ecnh duy\u1ec7t l\u00e0 m\u1ed9t k\u1ef9 thu\u1eadt trong \u0111\u00f3 ng\u01b0\u1eddi qu\u00e9t gi\u1ea3 v\u1edd l\u00e0 m\u1ed9t tr\u00ecnh duy\u1ec7t ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 bot. N\u00f3 li\u00ean quan \u0111\u1ebfn vi\u1ec7c g\u1eedi y\u00eau c\u1ea7u HTTP gi\u1ed1ng nh\u01b0 tr\u00ecnh duy\u1ec7t, bao g\u1ed3m ti\u00eau \u0111\u1ec1 v\u00e0 cookie.<\/p>\n<p>Li\u00ean quan ch\u1eb7t ch\u1ebd \u0111\u1ebfn vi\u1ec7c m\u00f4 ph\u1ecfng tr\u00ecnh duy\u1ec7t l\u00e0 vi\u1ec7c gi\u1ea3 m\u1ea1o t\u00e1c nh\u00e2n ng\u01b0\u1eddi d\u00f9ng. T\u00e1c nh\u00e2n ng\u01b0\u1eddi d\u00f9ng l\u00e0 m\u1ed9t chu\u1ed7i m\u00e0 tr\u00ecnh duy\u1ec7t g\u1eedi \u0111\u1ebfn trang web m\u00f4 t\u1ea3 ch\u00ednh n\u00f3, cho ph\u00e9p trang web cung c\u1ea5p n\u1ed9i dung ph\u00f9 h\u1ee3p v\u1edbi tr\u00ecnh duy\u1ec7t. B\u1eb1ng c\u00e1ch lu\u00e2n phi\u00ean t\u00e1c nh\u00e2n ng\u01b0\u1eddi d\u00f9ng, b\u1ea1n c\u00f3 th\u1ec3 l\u00e0m cho c\u00e1c y\u00eau c\u1ea7u xu\u1ea5t hi\u1ec7n t\u1eeb c\u00e1c tr\u00ecnh duy\u1ec7t kh\u00e1c nhau.<\/p>\n<h3>X\u1eed l\u00fd CAPTCHA<\/h3>\n<p>CAPTCHA l\u00e0 c\u00e1c th\u1eed nghi\u1ec7m nh\u1eb1m ph\u00e2n bi\u1ec7t con ng\u01b0\u1eddi v\u1edbi bot. M\u1eb7c d\u00f9 vi\u1ec7c gi\u1ea3i CAPTCHA theo c\u00e1ch th\u1ee7 c\u00f4ng l\u00e0 kh\u1ea3 thi \u0111\u1ed1i v\u1edbi vi\u1ec7c thu th\u1eadp d\u1eef li\u1ec7u \u1edf quy m\u00f4 nh\u1ecf nh\u01b0ng l\u1ea1i kh\u00f4ng th\u1ef1c t\u1ebf \u0111\u1ed1i v\u1edbi c\u00e1c ho\u1ea1t \u0111\u1ed9ng \u1edf quy m\u00f4 l\u1edbn.<\/p>\n<p>Hi\u1ec7n c\u00f3 c\u00e1c d\u1ecbch v\u1ee5 gi\u1ea3i CAPTCHA t\u1ef1 \u0111\u1ed9ng s\u1eed d\u1ee5ng nh\u1eadn d\u1ea1ng k\u00fd t\u1ef1 quang h\u1ecdc (OCR) \u0111\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c th\u00e1ch th\u1ee9c CAPTCHA. Tuy nhi\u00ean, t\u1ef7 l\u1ec7 th\u00e0nh c\u00f4ng kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a CAPTCHA. Ngo\u00e0i ra, s\u1eed d\u1ee5ng proxy ch\u1ea5t l\u01b0\u1ee3ng cao h\u01a1n m\u00e0 \u00edt c\u00f3 kh\u1ea3 n\u0103ng g\u1eb7p ph\u1ea3i CAPTCHA ngay t\u1eeb \u0111\u1ea7u c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n<h3>Nghi\u00ean c\u1ee9u \u0111i\u1ec3n h\u00ecnh v\u1ec1 vi\u1ec7c Scraping th\u00e0nh c\u00f4ng<\/h3>\n<ol>\n<li><strong>Khai th\u00e1c d\u1eef li\u1ec7u th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed<\/strong>: M\u1ed9t c\u00f4ng ty th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed mu\u1ed1n tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u t\u1eeb nhi\u1ec1u trang web c\u1ee7a \u0111\u1ed1i th\u1ee7 c\u1ea1nh tranh \u0111\u1ec3 so s\u00e1nh gi\u00e1 v\u00e0 ph\u00e2n t\u00edch s\u1ea3n ph\u1ea9m. Tuy nhi\u00ean, nh\u1eefng trang web n\u00e0y \u0111\u00e3 s\u1eed d\u1ee5ng t\u00ednh n\u0103ng b\u1ea3o v\u1ec7 c\u1ee7a Cloudflare. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng m\u1ed9t nh\u00f3m proxy trung t\u00e2m d\u1eef li\u1ec7u ch\u1ea5t l\u01b0\u1ee3ng cao c\u0169ng nh\u01b0 tri\u1ec3n khai gi\u1edbi h\u1ea1n t\u1ed1c \u0111\u1ed9 v\u00e0 xoay v\u00f2ng IP, c\u00f4ng ty \u0111\u00e3 qu\u00e9t d\u1eef li\u1ec7u th\u00e0nh c\u00f4ng m\u00e0 kh\u00f4ng b\u1ecb ch\u1eb7n.<\/li>\n<li><strong>T\u1ed5ng h\u1ee3p tin t\u1ee9c<\/strong>: M\u1ed9t d\u1ecbch v\u1ee5 t\u1ed5ng h\u1ee3p tin t\u1ee9c nh\u1eb1m m\u1ee5c \u0111\u00edch thu th\u1eadp c\u00e1c trang web tin t\u1ee9c kh\u00e1c nhau, nhi\u1ec1u trang web trong s\u1ed1 \u0111\u00f3 \u0111\u01b0\u1ee3c Cloudflare b\u1ea3o v\u1ec7. D\u1ecbch v\u1ee5 n\u00e0y \u0111\u00e3 s\u1eed d\u1ee5ng c\u00e1c k\u1ef9 thu\u1eadt m\u00f4 ph\u1ecfng tr\u00ecnh duy\u1ec7t c\u00f9ng v\u1edbi proxy c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u \u0111\u1ec3 thu th\u1eadp v\u00e0 t\u1ed5ng h\u1ee3p th\u00e0nh c\u00f4ng c\u00e1c b\u00e0i b\u00e1o.<\/li>\n<\/ol>\n<p>Nh\u1eefng chi\u1ebfn l\u01b0\u1ee3c n\u00e0y nh\u1ea5n m\u1ea1nh t\u1ea7m quan tr\u1ecdng c\u1ee7a vi\u1ec7c l\u1eadp k\u1ebf ho\u1ea1ch v\u00e0 th\u1ef1c hi\u1ec7n c\u1ea9n th\u1eadn trong qu\u00e1 tr\u00ecnh qu\u00e9t web. Khi ph\u00e2n t\u00edch c\u00fa ph\u00e1p c\u00e1c trang web \u0111\u01b0\u1ee3c Cloudflare b\u1ea3o v\u1ec7, s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a c\u00e1c c\u00f4ng c\u1ee5 ph\u00f9 h\u1ee3p\u2014nh\u01b0 proxy c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u\u2014v\u00e0 c\u00e1c k\u1ef9 thu\u1eadt chi\u1ebfn l\u01b0\u1ee3c c\u00f3 th\u1ec3 gi\u00fap tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u th\u00e0nh c\u00f4ng v\u00e0 hi\u1ec7u qu\u1ea3. Ph\u1ea7n s\u1eafp t\u1edbi s\u1ebd \u0111i s\u00e2u v\u00e0o c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau v\u00e0 c\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng ph\u00e2n t\u00edch c\u00fa ph\u00e1p c\u00e1c trang web \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1edfi Cloudflare b\u1eb1ng proxy.<\/p>\n<p>&nbsp;<\/p>\n<h2>C\u00e1c \u1ee9ng d\u1ee5ng v\u00e0 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng ph\u00e2n t\u00edch c\u00fa ph\u00e1p c\u00e1c trang web \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1edfi Cloudflare b\u1eb1ng proxy<\/h2>\n<p>C\u00e1c k\u1ef9 thu\u1eadt v\u00e0 chi\u1ebfn l\u01b0\u1ee3c ph\u00e2n t\u00edch c\u00fa ph\u00e1p c\u00e1c trang web \u0111\u01b0\u1ee3c Cloudflare b\u1ea3o v\u1ec7 b\u1eb1ng proxy c\u00f3 \u1ee9ng d\u1ee5ng \u0111a d\u1ea1ng tr\u00ean nhi\u1ec1u l\u0129nh v\u1ef1c kh\u00e1c nhau. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng v\u00e0 \u1ee9ng d\u1ee5ng \u0111\u00e1ng ch\u00fa \u00fd trong \u0111\u00f3 proxy c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ee9ng minh l\u00e0 t\u00e0i s\u1ea3n v\u00f4 gi\u00e1:<\/p>\n<p><strong>Ph\u00e2n t\u00edch c\u1ea1nh tranh v\u00e0 kinh doanh th\u00f4ng minh<\/strong><\/p>\n<p>C\u00e1c c\u00f4ng ty trong c\u00e1c ng\u00e0nh s\u1eed d\u1ee5ng t\u00ednh n\u0103ng qu\u00e9t web \u0111\u1ec3 thu th\u1eadp th\u00f4ng tin kinh doanh quan tr\u1ecdng v\u1ec1 \u0111\u1ed1i th\u1ee7 c\u1ea1nh tranh c\u1ee7a h\u1ecd. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 li\u00ean quan \u0111\u1ebfn vi\u1ec7c thu th\u1eadp th\u00f4ng tin chi ti\u1ebft v\u1ec1 s\u1ea3n ph\u1ea9m, th\u00f4ng tin v\u1ec1 gi\u00e1, \u0111\u00e1nh gi\u00e1 c\u1ee7a kh\u00e1ch h\u00e0ng v\u00e0 c\u00e1c d\u1eef li\u1ec7u li\u00ean quan kh\u00e1c. C\u00e1c trang web c\u1ee7a \u0111\u1ed1i th\u1ee7 c\u1ea1nh tranh \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1eb1ng Cloudflare \u0111\u1eb7t ra th\u00e1ch th\u1ee9c trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y. Tuy nhi\u00ean, v\u1edbi chi\u1ebfn l\u01b0\u1ee3c qu\u00e9t v\u00e0 thi\u1ebft l\u1eadp proxy ph\u00f9 h\u1ee3p, doanh nghi\u1ec7p c\u00f3 th\u1ec3 thu th\u1eadp d\u1eef li\u1ec7u c\u1ea7n thi\u1ebft n\u00e0y \u0111\u1ec3 ph\u00e2n t\u00edch c\u1ea1nh tranh.<\/p>\n<p><strong>Ph\u00e2n t\u00edch ti\u1ebfp th\u1ecb v\u00e0 t\u00ecnh c\u1ea3m<\/strong><\/p>\n<p>C\u00e1c nh\u00f3m ti\u1ebfp th\u1ecb th\u01b0\u1eddng t\u00ecm hi\u1ec3u c\u00e1c n\u1ec1n t\u1ea3ng truy\u1ec1n th\u00f4ng x\u00e3 h\u1ed9i v\u00e0 di\u1ec5n \u0111\u00e0n tr\u1ef1c tuy\u1ebfn \u0111\u1ec3 hi\u1ec3u c\u1ea3m nh\u1eadn c\u1ee7a c\u00f4ng ch\u00fang v\u1ec1 s\u1ea3n ph\u1ea9m ho\u1eb7c d\u1ecbch v\u1ee5 c\u1ee7a h\u1ecd. Nhi\u1ec1u n\u1ec1n t\u1ea3ng trong s\u1ed1 n\u00e0y s\u1eed d\u1ee5ng Cloudflare \u0111\u1ec3 b\u1ea3o v\u1ec7. Proxy c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 qu\u00e9t c\u00e1c trang web n\u00e0y m\u1ed9t c\u00e1ch \u1ea9n danh v\u00e0 hi\u1ec7u qu\u1ea3 \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c nh\u1eefng hi\u1ec3u bi\u1ebft c\u00f3 gi\u00e1 tr\u1ecb v\u1ec1 t\u00e2m l\u00fd v\u00e0 xu h\u01b0\u1edbng c\u1ee7a kh\u00e1ch h\u00e0ng.<\/p>\n<p><strong>Gi\u00e1m s\u00e1t SEO<\/strong><\/p>\n<p>C\u00e1c chuy\u00ean gia SEO c\u1ea7n li\u00ean t\u1ee5c theo d\u00f5i th\u1ee9 h\u1ea1ng c\u1ee7a c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm v\u00e0 s\u1ed1 li\u1ec7u hi\u1ec7u su\u1ea5t trang web. Do c\u00e1c c\u00f4ng c\u1ee5 t\u00ecm ki\u1ebfm s\u1eed d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p ch\u1ed1ng bot tinh vi (bao g\u1ed3m c\u1ea3 vi\u1ec7c s\u1eed d\u1ee5ng Cloudflare), proxy l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 quan tr\u1ecdng \u0111\u1ec3 thu th\u1eadp d\u1eef li\u1ec7u n\u00e0y m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 m\u00e0 kh\u00f4ng k\u00edch ho\u1ea1t b\u1ea5t k\u1ef3 c\u1ea3nh b\u00e1o n\u00e0o.<\/p>\n<p><strong>T\u1ed5ng h\u1ee3p d\u1eef li\u1ec7u b\u1ea5t \u0111\u1ed9ng s\u1ea3n v\u00e0 t\u00e0i s\u1ea3n<\/strong><\/p>\n<p>C\u00e1c n\u1ec1n t\u1ea3ng b\u1ea5t \u0111\u1ed9ng s\u1ea3n th\u01b0\u1eddng thu th\u1eadp c\u00e1c trang web li\u1ec7t k\u00ea b\u1ea5t \u0111\u1ed9ng s\u1ea3n \u0111\u1ec3 thu th\u1eadp d\u1eef li\u1ec7u v\u1ec1 gi\u00e1 b\u1ea5t \u0111\u1ed9ng s\u1ea3n, t\u00ednh n\u0103ng, v\u1ecb tr\u00ed, v.v. Tuy nhi\u00ean, c\u00e1c trang web n\u00e0y th\u01b0\u1eddng s\u1eed d\u1ee5ng Cloudflare \u0111\u1ec3 ng\u0103n vi\u1ec7c tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u t\u1ef1 \u0111\u1ed9ng. Proxy c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u c\u00f3 th\u1ec3 l\u00e0 nh\u00e2n t\u1ed1 thay \u0111\u1ed5i cu\u1ed9c ch\u01a1i trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, cho ph\u00e9p qu\u00e9t d\u1eef li\u1ec7u thu\u1ed9c t\u00ednh m\u1ed9t c\u00e1ch li\u1ec1n m\u1ea1ch.<\/p>\n<p><strong>T\u1ed5ng h\u1ee3p gi\u00e1 v\u00e9 du l\u1ecbch<\/strong><\/p>\n<p>C\u00e1c trang web t\u1ed5ng h\u1ee3p gi\u00e1 v\u00e9 du l\u1ecbch d\u1ef1a v\u00e0o d\u1eef li\u1ec7u thu th\u1eadp \u0111\u01b0\u1ee3c t\u1eeb nhi\u1ec1u trang web c\u1ee7a h\u00e3ng h\u00e0ng kh\u00f4ng v\u00e0 kh\u00e1ch s\u1ea1n kh\u00e1c nhau \u0111\u1ec3 c\u00f3 gi\u00e1 v\u00e9 v\u00e0 gi\u00e1 m\u1edbi nh\u1ea5t. Nhi\u1ec1u trang web trong s\u1ed1 n\u00e0y s\u1eed d\u1ee5ng Cloudflare \u0111\u1ec3 b\u1ea3o v\u1ec7, khi\u1ebfn c\u00e1c nh\u00e0 t\u1ed5ng h\u1ee3p g\u1eb7p kh\u00f3 kh\u0103n trong vi\u1ec7c tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u. Vi\u1ec7c s\u1eed d\u1ee5ng proxy cho ph\u00e9p c\u00e1c tr\u00ecnh t\u1ed5ng h\u1ee3p n\u00e0y truy c\u1eadp d\u1eef li\u1ec7u m\u00e0 kh\u00f4ng b\u1ecb ch\u1eb7n.<\/p>\n<p><strong>Nghi\u00ean c\u1ee9u h\u1ecdc thu\u1eadt<\/strong><\/p>\n<p>Trong gi\u1edbi h\u1ecdc thu\u1eadt, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u th\u01b0\u1eddng c\u1ea7n thu th\u1eadp l\u01b0\u1ee3ng l\u1edbn d\u1eef li\u1ec7u t\u1eeb nhi\u1ec1u trang web kh\u00e1c nhau cho c\u00e1c nghi\u00ean c\u1ee9u kh\u00e1c nhau. Ch\u00fang c\u00f3 th\u1ec3 bao g\u1ed3m t\u1eeb nghi\u00ean c\u1ee9u khoa h\u1ecdc x\u00e3 h\u1ed9i li\u00ean quan \u0111\u1ebfn d\u1eef li\u1ec7u truy\u1ec1n th\u00f4ng x\u00e3 h\u1ed9i \u0111\u1ebfn nghi\u00ean c\u1ee9u ng\u00f4n ng\u1eef h\u1ecdc t\u00ednh to\u00e1n y\u00eau c\u1ea7u d\u1eef li\u1ec7u v\u0103n b\u1ea3n. Proxy c\u00f3 th\u1ec3 \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch khi c\u00e1c trang web n\u00e0y \u0111\u01b0\u1ee3c Cloudflare b\u1ea3o v\u1ec7.<\/p>\n<p><strong>T\u1ed5ng h\u1ee3p c\u00f4ng vi\u1ec7c<\/strong><\/p>\n<p>C\u00e1c trang web t\u1ed5ng h\u1ee3p vi\u1ec7c l\u00e0m thu th\u1eadp c\u00e1c tin tuy\u1ec3n d\u1ee5ng t\u1eeb c\u00e1c trang tuy\u1ec3n d\u1ee5ng c\u1ee7a c\u00e1c c\u00f4ng ty kh\u00e1c nhau \u0111\u1ec3 cung c\u1ea5p c\u00e1i nh\u00ecn t\u1ed5ng h\u1ee3p. Nhi\u1ec1u trang web c\u1ee7a c\u00f4ng ty n\u00e0y s\u1eed d\u1ee5ng Cloudflare, \u0111\u1eb7t ra th\u00e1ch th\u1ee9c cho c\u00e1c nh\u00e0 t\u1ed5ng h\u1ee3p vi\u1ec7c l\u00e0m. Proxy c\u00f3 th\u1ec3 gi\u00fap b\u1ecf qua nh\u1eefng h\u1ea1n ch\u1ebf n\u00e0y, cho ph\u00e9p tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u danh s\u00e1ch vi\u1ec7c l\u00e0m m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n<p>Vi\u1ec7c s\u1eed d\u1ee5ng proxy c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u trong c\u00e1c t\u00ecnh hu\u1ed1ng n\u00e0y kh\u00f4ng ch\u1ec9 \u0111\u1ea3m b\u1ea3o th\u1ef1c hi\u1ec7n tr\u01a1n tru c\u00e1c t\u00e1c v\u1ee5 qu\u00e9t web m\u00e0 c\u00f2n duy tr\u00ec t\u00ednh \u1ea9n danh c\u1ee7a tr\u00ecnh qu\u00e9t, t\u1eeb \u0111\u00f3 gi\u1ea3m thi\u1ec3u nguy c\u01a1 ch\u1eb7n ho\u1eb7c c\u1ea5m IP. V\u1edbi s\u1ef1 hi\u1ec3u bi\u1ebft v\u1ec1 \u1ee9ng d\u1ee5ng v\u00e0 tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng n\u00e0y, ch\u00fang t\u00f4i c\u00f3 th\u1ec3 \u0111\u00e1nh gi\u00e1 cao ph\u1ea1m vi r\u1ed9ng c\u1ee7a vi\u1ec7c ph\u00e2n t\u00edch c\u00fa ph\u00e1p c\u00e1c trang web \u0111\u01b0\u1ee3c Cloudflare b\u1ea3o v\u1ec7 b\u1eb1ng proxy. Ph\u1ea7n ti\u1ebfp theo s\u1ebd gi\u1ea3i quy\u1ebft m\u1ed9t s\u1ed1 c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p li\u00ean quan \u0111\u1ebfn ch\u1ee7 \u0111\u1ec1 n\u00e0y.<\/p>\n<p>&nbsp;<\/p>\n<h2>Nh\u1eefng c\u00e2n nh\u1eafc v\u1ec1 m\u1eb7t ph\u00e1p l\u00fd v\u00e0 \u0111\u1ea1o \u0111\u1ee9c c\u1ee7a vi\u1ec7c qu\u00e9t web<\/h2>\n<p>Trong khi th\u1ea3o lu\u1eadn v\u1ec1 vi\u1ec7c qu\u00e9t web, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i xem x\u00e9t c\u00e1c t\u00e1c \u0111\u1ed9ng ph\u00e1p l\u00fd v\u00e0 \u0111\u1ea1o \u0111\u1ee9c. M\u1eb7c d\u00f9 vi\u1ec7c qu\u00e9t web l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd \u0111\u1ec3 tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u nh\u01b0ng kh\u00f4ng ph\u1ea3i m\u1ecdi ho\u1ea1t \u0111\u1ed9ng qu\u00e9t d\u1eef li\u1ec7u \u0111\u1ec1u \u0111\u01b0\u1ee3c ph\u00e9p ho\u1eb7c h\u1ee3p \u0111\u1ea1o \u0111\u1ee9c.<\/p>\n<p><strong>Quan \u0111i\u1ec3m ph\u00e1p l\u00fd<\/strong><\/p>\n<p>T\u00ednh h\u1ee3p ph\u00e1p c\u1ee7a vi\u1ec7c qu\u00e9t web kh\u00e1c nhau t\u00f9y theo khu v\u1ef1c ph\u00e1p l\u00fd, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i hi\u1ec3u c\u00e1c lu\u1eadt c\u1ee5 th\u1ec3 \u00e1p d\u1ee5ng trong khu v\u1ef1c c\u1ee7a b\u1ea1n. N\u00f3i chung, d\u1eef li\u1ec7u c\u00f4ng khai tr\u00ean m\u1ed9t trang web th\u01b0\u1eddng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thu th\u1eadp m\u1ed9t c\u00e1ch h\u1ee3p ph\u00e1p. Tuy nhi\u00ean, vi\u1ec7c thu th\u1eadp d\u1eef li\u1ec7u ri\u00eang t\u01b0, ch\u1eb3ng h\u1ea1n nh\u01b0 th\u00f4ng tin ng\u01b0\u1eddi d\u00f9ng c\u00e1 nh\u00e2n, m\u00e0 kh\u00f4ng c\u00f3 s\u1ef1 \u0111\u1ed3ng \u00fd th\u01b0\u1eddng l\u00e0 b\u1ea5t h\u1ee3p ph\u00e1p.<\/p>\n<p>H\u01a1n n\u1eefa, nhi\u1ec1u trang web c\u00f3 t\u1ec7p \u201crobots.txt\u201d ho\u1eb7c c\u00e1c quy \u0111\u1ecbnh trong \u0110i\u1ec1u kho\u1ea3n d\u1ecbch v\u1ee5 c\u1ee7a h\u1ecd c\u00f3 th\u1ec3 kh\u00f4ng cho ph\u00e9p ho\u1eb7c h\u1ea1n ch\u1ebf vi\u1ec7c qu\u00e9t web m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng. Vi\u1ec7c b\u1ecf qua nh\u1eefng \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn h\u1eadu qu\u1ea3 ph\u00e1p l\u00fd.<\/p>\n<p>C\u00e1c ph\u00e1n quy\u1ebft c\u1ee7a t\u00f2a \u00e1n, ch\u1eb3ng h\u1ea1n nh\u01b0 v\u1ee5 hiQ Labs, Inc. ki\u1ec7n LinkedIn Corp. \u1edf Hoa K\u1ef3, \u0111\u00e3 \u0111\u1eb7t ra m\u1ed9t s\u1ed1 ti\u1ec1n l\u1ec7, nh\u01b0ng b\u1ed1i c\u1ea3nh v\u1eabn ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n. Lu\u00f4n tham kh\u1ea3o \u00fd ki\u1ebfn c\u1ee7a chuy\u00ean gia ph\u00e1p l\u00fd n\u1ebfu b\u1ea1n kh\u00f4ng ch\u1eafc ch\u1eafn v\u1ec1 t\u00ednh h\u1ee3p ph\u00e1p c\u1ee7a ho\u1ea1t \u0111\u1ed9ng thu th\u1eadp d\u1eef li\u1ec7u c\u1ee7a m\u00ecnh.<\/p>\n<p><strong>Quan \u0111i\u1ec3m \u0111\u1ea1o \u0111\u1ee9c<\/strong><\/p>\n<p>Ngo\u00e0i c\u00e1c kh\u00eda c\u1ea1nh ph\u00e1p l\u00fd, nh\u1eefng c\u00e2n nh\u1eafc v\u1ec1 \u0111\u1ea1o \u0111\u1ee9c c\u0169ng c\u00f3 vai tr\u00f2 quan tr\u1ecdng. Ngay c\u1ea3 khi vi\u1ec7c thu th\u1eadp th\u00f4ng tin \u0111\u01b0\u1ee3c cho ph\u00e9p v\u1ec1 m\u1eb7t ph\u00e1p l\u00fd, vi\u1ec7c t\u1ea5n c\u00f4ng d\u1ed3n d\u1eadp m\u1ed9t trang web v\u1edbi s\u1ed1 l\u01b0\u1ee3ng y\u00eau c\u1ea7u l\u1edbn c\u00f3 th\u1ec3 l\u00e0m gi\u00e1n \u0111o\u1ea1n ch\u1ee9c n\u0103ng c\u1ee7a trang web \u0111\u00f3, \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn tr\u1ea3i nghi\u1ec7m c\u1ee7a ng\u01b0\u1eddi d\u00f9ng kh\u00e1c ho\u1eb7c th\u1eadm ch\u00ed g\u00e2y ra th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng.<\/p>\n<p>T\u00f4n tr\u1ecdng gi\u1edbi h\u1ea1n t\u1ef7 l\u1ec7, tr\u00e1nh thu th\u1eadp d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m v\u00e0 c\u1ed1 g\u1eafng kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ho\u1ea1t \u0111\u1ed9ng th\u01b0\u1eddng xuy\u00ean c\u1ee7a trang web l\u00e0 nh\u1eefng c\u00e1ch l\u00e0m t\u1ed1t n\u00ean tu\u00e2n theo.<\/p>\n<p>T\u00f3m l\u1ea1i, m\u1eb7c d\u00f9 proxy, bao g\u1ed3m c\u1ea3 proxy c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u, c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 vi\u1ec7c qu\u00e9t web, nh\u01b0ng \u0111i\u1ec1u c\u1ea7n thi\u1ebft l\u00e0 ph\u1ea3i xem x\u00e9t c\u00e1c t\u00e1c \u0111\u1ed9ng ph\u00e1p l\u00fd v\u00e0 \u0111\u1ea1o \u0111\u1ee9c. Vi\u1ec7c qu\u00e9t web c\u00f3 tr\u00e1ch nhi\u1ec7m v\u00e0 t\u00f4n tr\u1ecdng mang l\u1ea1i l\u1ee3i \u00edch cho t\u1ea5t c\u1ea3 m\u1ecdi ng\u01b0\u1eddi tham gia.<\/p>\n<p>&nbsp;<\/p>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ)<\/h2>\n<p><strong>C\u00e2u h\u1ecfi 1: T\u00f4i c\u00f3 th\u1ec3 qu\u00e9t m\u1ed9t trang web \u0111\u01b0\u1ee3c Cloudflare b\u1ea3o v\u1ec7 m\u00e0 kh\u00f4ng c\u1ea7n s\u1eed d\u1ee5ng proxy kh\u00f4ng?<\/strong><\/p>\n<p>M\u1eb7c d\u00f9 v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt c\u00f3 th\u1ec3 qu\u00e9t m\u1ed9t trang web \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1edfi Cloudflare m\u00e0 kh\u00f4ng c\u1ea7n s\u1eed d\u1ee5ng proxy, nh\u01b0ng \u0111i\u1ec1u \u0111\u00f3 kh\u00e1 kh\u00f3 kh\u0103n. Proxy, \u0111\u1eb7c bi\u1ec7t l\u00e0 proxy trung t\u00e2m d\u1eef li\u1ec7u, cung c\u1ea5p kh\u1ea3 n\u0103ng xoay \u0111\u1ecba ch\u1ec9 IP, b\u1eaft ch\u01b0\u1edbc h\u00e0nh vi duy\u1ec7t web c\u1ee7a con ng\u01b0\u1eddi v\u00e0 t\u0103ng c\u01a1 h\u1ed9i tr\u00e1nh b\u1ecb ph\u00e1t hi\u1ec7n v\u00e0 ch\u1eb7n.<\/p>\n<p><strong>C\u00e2u h\u1ecfi 2: T\u00f4i \u0111\u00e3 b\u1ecb Cloudflare ch\u1eb7n khi s\u1eed d\u1ee5ng proxy c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u. T\u00f4i n\u00ean l\u00e0m g\u00ec?<\/strong><\/p>\n<p>N\u1ebfu b\u1ea1n b\u1ecb ch\u1eb7n khi s\u1eed d\u1ee5ng proxy c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u, c\u00f3 th\u1ec3 do g\u1eedi qu\u00e1 nhi\u1ec1u y\u00eau c\u1ea7u trong th\u1eddi gian ng\u1eafn ho\u1eb7c c\u00f3 \u0111\u1ecba ch\u1ec9 IP d\u00f9ng chung \u0111\u00e3 b\u1ecb c\u1ea5m do ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ng\u01b0\u1eddi d\u00f9ng kh\u00e1c. B\u1ea1n c\u00f3 th\u1ec3 th\u1eed gi\u1ea3m t\u1ed1c \u0111\u1ed9 y\u00eau c\u1ea7u, lu\u00e2n chuy\u1ec3n \u0111\u1ecba ch\u1ec9 IP th\u01b0\u1eddng xuy\u00ean h\u01a1n ho\u1eb7c s\u1eed d\u1ee5ng proxy chuy\u00ean d\u1ee5ng.<\/p>\n<p><strong>C\u00e2u h\u1ecfi 3: Vi\u1ec7c s\u1eed d\u1ee5ng proxy \u0111\u1ec3 thu th\u1eadp th\u00f4ng tin trang web c\u00f3 vi ph\u1ea1m ph\u00e1p lu\u1eadt kh\u00f4ng?<\/strong><\/p>\n<p>T\u00ednh h\u1ee3p ph\u00e1p c\u1ee7a vi\u1ec7c qu\u00e9t web (bao g\u1ed3m c\u1ea3 proxy) kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o khu v\u1ef1c ph\u00e1p l\u00fd v\u00e0 \u0111i\u1ec1u kho\u1ea3n d\u1ecbch v\u1ee5 c\u1ee7a trang web c\u1ee5 th\u1ec3. Lu\u00f4n tham kh\u1ea3o \u00fd ki\u1ebfn c\u1ee7a chuy\u00ean gia ph\u00e1p l\u00fd n\u1ebfu b\u1ea1n kh\u00f4ng ch\u1eafc ch\u1eafn v\u00e0 \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u1ea1n kh\u00f4ng thu th\u1eadp d\u1eef li\u1ec7u c\u00e1 nh\u00e2n nh\u1ea1y c\u1ea3m ho\u1eb7c vi ph\u1ea1m b\u1ea5t k\u1ef3 \u0111i\u1ec1u kho\u1ea3n d\u1ecbch v\u1ee5 n\u00e0o.<\/p>\n<p><strong>C\u00e2u h\u1ecfi 4: T\u00f4i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng proxy mi\u1ec5n ph\u00ed \u0111\u1ec3 qu\u00e9t web c\u00e1c trang web \u0111\u01b0\u1ee3c Cloudflare b\u1ea3o v\u1ec7 kh\u00f4ng?<\/strong><\/p>\n<p>M\u1eb7c d\u00f9 proxy mi\u1ec5n ph\u00ed c\u00f3 th\u1ec3 h\u1ea5p d\u1eabn nh\u01b0ng ch\u00fang th\u01b0\u1eddng c\u00f3 nh\u1eefng h\u1ea1n ch\u1ebf \u0111\u00e1ng k\u1ec3, bao g\u1ed3m \u0111\u1ed9 tin c\u1eady k\u00e9m, t\u1ed1c \u0111\u1ed9 ch\u1eadm v\u00e0 kh\u1ea3 n\u0103ng b\u1ecb ph\u00e1t hi\u1ec7n v\u00e0 ch\u1eb7n cao h\u01a1n. \u0110\u1ec3 qu\u00e9t hi\u1ec7u qu\u1ea3 v\u00e0 \u0111\u00e1ng tin c\u1eady c\u00e1c trang web \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1edfi Cloudflare, b\u1ea1n n\u00ean s\u1eed d\u1ee5ng proxy trung t\u00e2m d\u1eef li\u1ec7u ch\u1ea5t l\u01b0\u1ee3ng cao, tr\u1ea3 ph\u00ed.<\/p>\n<p><strong>C\u00e2u h\u1ecfi 5: T\u00f4i c\u00f3 c\u1ea7n k\u1ef9 n\u0103ng k\u1ef9 thu\u1eadt \u0111\u1ec3 qu\u00e9t c\u00e1c trang web \u0111\u01b0\u1ee3c Cloudflare b\u1ea3o v\u1ec7 kh\u00f4ng?<\/strong><\/p>\n<p>M\u1eb7c d\u00f9 c\u00f3 c\u00e1c k\u1ef9 n\u0103ng k\u1ef9 thu\u1eadt, \u0111\u1eb7c bi\u1ec7t l\u00e0 v\u1ec1 l\u1eadp tr\u00ecnh, c\u00f3 th\u1ec3 c\u00f3 l\u1ee3i cho vi\u1ec7c qu\u00e9t web, nh\u01b0ng m\u1ed9t s\u1ed1 c\u00f4ng c\u1ee5 v\u00e0 d\u1ecbch v\u1ee5 cung c\u1ea5p giao di\u1ec7n d\u1ec5 s\u1eed d\u1ee5ng \u0111\u1ec3 qu\u00e9t, \u0111\u00f2i h\u1ecfi ki\u1ebfn th\u1ee9c k\u1ef9 thu\u1eadt t\u1ed1i thi\u1ec3u. Tuy nhi\u00ean, hi\u1ec3u nh\u1eefng \u0111i\u1ec1u c\u01a1 b\u1ea3n v\u1ec1 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a proxy v\u00e0 ho\u1ea1t \u0111\u1ed9ng thu th\u1eadp d\u1eef li\u1ec7u ch\u1eafc ch\u1eafn s\u1ebd c\u00f3 l\u1ee3i.<\/p>\n<p>&nbsp;<\/p>\n<h2>K\u1ebft lu\u1eadn v\u00e0 vi\u1ec5n c\u1ea3nh t\u01b0\u01a1ng lai<\/h2>\n<p>S\u1ef1 giao thoa gi\u1eefa qu\u00e9t web, proxy v\u00e0 Cloudflare th\u1ec3 hi\u1ec7n m\u1ed9t b\u1ed1i c\u1ea3nh h\u1ea5p d\u1eabn c\u00f3 ti\u1ec1m n\u0103ng khai th\u00e1c d\u1eef li\u1ec7u to l\u1edbn. Khi c\u00e1c doanh nghi\u1ec7p v\u00e0 c\u00e1 nh\u00e2n c\u1ed1 g\u1eafng t\u1eadn d\u1ee5ng d\u1eef li\u1ec7u theo nh\u1eefng c\u00e1ch ng\u00e0y c\u00e0ng \u0111\u1ed5i m\u1edbi, t\u1ea7m quan tr\u1ecdng c\u1ee7a vi\u1ec7c qu\u00e9t web hi\u1ec7u qu\u1ea3 v\u00e0 hi\u1ec7u qu\u1ea3 kh\u00f4ng th\u1ec3 b\u1ecb ph\u00f3ng \u0111\u1ea1i.<\/p>\n<p>C\u00e1c trang web \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1edfi Cloudflare \u0111\u1eb7t ra m\u1ed9t th\u00e1ch th\u1ee9c ri\u00eang trong mi\u1ec1n n\u00e0y, nh\u01b0ng nh\u01b0 ch\u00fang ta \u0111\u00e3 th\u1ea5y trong su\u1ed1t b\u00e0i vi\u1ebft n\u00e0y, nh\u1eefng th\u00e1ch th\u1ee9c n\u00e0y kh\u00f4ng ph\u1ea3i l\u00e0 kh\u00f4ng th\u1ec3 v\u01b0\u1ee3t qua. V\u1edbi c\u00e1c c\u00f4ng c\u1ee5 ph\u00f9 h\u1ee3p\u2014ch\u1eb3ng h\u1ea1n nh\u01b0 proxy c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u\u2014v\u00e0 c\u00e1c k\u1ef9 thu\u1eadt chi\u1ebfn l\u01b0\u1ee3c, c\u00f3 th\u1ec3 ph\u00e2n t\u00edch v\u00e0 tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u c\u00f3 gi\u00e1 tr\u1ecb t\u1eeb c\u00e1c trang web n\u00e0y.<\/p>\n<p>Proxy c\u1ee7a trung t\u00e2m d\u1eef li\u1ec7u, v\u1edbi t\u1ed1c \u0111\u1ed9, t\u00ednh \u1ea9n danh, kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng v\u00e0 hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed, l\u00e0 m\u1ed9t gi\u1ea3i ph\u00e1p h\u1ea5p d\u1eabn cho nh\u1eefng th\u00e1ch th\u1ee9c do Cloudflare \u0111\u1eb7t ra. Khi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng m\u1ed9t c\u00e1ch th\u00f4ng minh, ch\u00fang c\u00f3 th\u1ec3 gi\u00fap \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c ho\u1ea1t \u0111\u1ed9ng qu\u00e9t web kh\u00f4ng b\u1ecb ph\u00e1t hi\u1ec7n, tr\u00e1nh b\u1ecb ch\u1eb7n v\u00e0 duy tr\u00ec quy\u1ec1n truy c\u1eadp nh\u1ea5t qu\u00e1n v\u00e0o d\u1eef li\u1ec7u mong mu\u1ed1n.<\/p>\n<p>M\u1eb7c d\u00f9 c\u00e1c chi\u1ebfn l\u01b0\u1ee3c hi\u1ec7n t\u1ea1i c\u00f3 hi\u1ec7u qu\u1ea3 nh\u01b0ng \u0111i\u1ec1u c\u1ea7n thi\u1ebft l\u00e0 ph\u1ea3i nh\u1eadn ra t\u00ednh ch\u1ea5t n\u0103ng \u0111\u1ed9ng c\u1ee7a l\u0129nh v\u1ef1c n\u00e0y. Khi c\u00e1c bi\u1ec7n ph\u00e1p ch\u1ed1ng bot ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n th\u00ec c\u00e1c chi\u1ebfn l\u01b0\u1ee3c v\u00e0 c\u00f4ng c\u1ee5 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111i\u1ec1u h\u01b0\u1edbng c\u00e1c bi\u1ec7n ph\u00e1p n\u00e0y c\u0169ng ph\u1ea3i ph\u00e1t tri\u1ec3n. Xu h\u01b0\u1edbng trong t\u01b0\u01a1ng lai trong l\u0129nh v\u1ef1c n\u00e0y c\u00f3 th\u1ec3 bao g\u1ed3m c\u00e1c h\u1ec7 th\u1ed1ng xoay v\u00f2ng IP ti\u00ean ti\u1ebfn h\u01a1n, c\u00e1c k\u1ef9 thu\u1eadt m\u00f4 ph\u1ecfng tr\u00ecnh duy\u1ec7t tinh t\u1ebf h\u01a1n v\u00e0 th\u1eadm ch\u00ed c\u00f3 th\u1ec3 l\u00e0 c\u00e1c gi\u1ea3i ph\u00e1p d\u1ef1a tr\u00ean AI \u0111\u1ec3 b\u1eaft ch\u01b0\u1edbc c\u00e1c h\u00e0nh vi duy\u1ec7t web gi\u1ed1ng con ng\u01b0\u1eddi m\u1ed9t c\u00e1ch thuy\u1ebft ph\u1ee5c h\u01a1n.<\/p>\n<p>Tuy nhi\u00ean, khi ch\u00fang t\u00f4i mong \u0111\u1ee3i nh\u1eefng ti\u1ebfn b\u1ed9 n\u00e0y, t\u1ea7m quan tr\u1ecdng c\u1ee7a vi\u1ec7c c\u00e2n nh\u1eafc v\u1ec1 m\u1eb7t ph\u00e1p l\u00fd v\u00e0 \u0111\u1ea1o \u0111\u1ee9c trong vi\u1ec7c qu\u00e9t web v\u1eabn kh\u00f4ng \u0111\u1ed5i. V\u00ec c\u00f4ng ngh\u1ec7 gi\u00fap vi\u1ec7c tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u tr\u1edf n\u00ean d\u1ec5 d\u00e0ng h\u01a1n n\u00ean vi\u1ec7c t\u00f4n tr\u1ecdng quy\u1ec1n ri\u00eang t\u01b0, tu\u00e2n th\u1ee7 c\u00e1c \u0111i\u1ec1u kho\u1ea3n d\u1ecbch v\u1ee5 v\u00e0 duy tr\u00ec cam k\u1ebft th\u1ef1c h\u00e0nh \u0111\u1ea1o \u0111\u1ee9c l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng h\u01a1n bao gi\u1edd h\u1ebft.<\/p>\n<p>Cu\u1ed1i c\u00f9ng, vi\u1ec7c ph\u00e2n t\u00edch c\u00fa ph\u00e1p th\u00e0nh c\u00f4ng c\u00e1c trang web \u0111\u01b0\u1ee3c Cloudflare b\u1ea3o v\u1ec7 b\u1eb1ng proxy l\u00e0 m\u1ed9t minh ch\u1ee9ng m\u1ea1nh m\u1ebd v\u1ec1 ti\u1ec1m n\u0103ng c\u1ee7a vi\u1ec7c qu\u00e9t web. N\u00f3 nh\u1ea5n m\u1ea1nh t\u1ea7m quan tr\u1ecdng c\u1ee7a kh\u1ea3 n\u0103ng th\u00edch \u1ee9ng, l\u1eadp k\u1ebf ho\u1ea1ch chi\u1ebfn l\u01b0\u1ee3c v\u00e0 s\u1eed d\u1ee5ng hi\u1ec7u qu\u1ea3 c\u00e1c c\u00f4ng c\u1ee5 trong vi\u1ec7c v\u01b0\u1ee3t qua c\u00e1c th\u00e1ch th\u1ee9c v\u00e0 \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u00e1c m\u1ee5c ti\u00eau khai th\u00e1c d\u1eef li\u1ec7u.<\/p>\n<p>Khi ch\u00fang ta ti\u1ebfn t\u1edbi t\u01b0\u01a1ng lai, kh\u1ea3 n\u0103ng ph\u00e2n t\u00edch c\u00fa ph\u00e1p c\u00e1c trang web \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1edfi Cloudflare b\u1eb1ng proxy s\u1ebd ti\u1ebfp t\u1ee5c trao quy\u1ec1n cho c\u00e1c doanh nghi\u1ec7p v\u00e0 c\u00e1 nh\u00e2n khai th\u00e1c gi\u00e1 tr\u1ecb t\u1eeb web. V\u1edbi m\u1ed7i trang web \u0111\u01b0\u1ee3c thu th\u1eadp, ch\u00fang t\u00f4i kh\u00f4ng ch\u1ec9 tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u m\u00e0 c\u00f2n t\u1ea1o ra nh\u1eefng hi\u1ec3u bi\u1ebft s\u00e2u s\u1eafc, th\u00fac \u0111\u1ea9y s\u1ef1 \u0111\u1ed5i m\u1edbi v\u00e0 th\u00fac \u0111\u1ea9y t\u0103ng tr\u01b0\u1edfng theo v\u00f4 s\u1ed1 c\u00e1ch. Khi b\u1ed1i c\u1ea3nh ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n, c\u00f3 m\u1ed9t \u0111i\u1ec1u ch\u1eafc ch\u1eafn - t\u01b0\u01a1ng lai c\u1ee7a vi\u1ec7c qu\u00e9t web th\u1ef1c s\u1ef1 \u0111\u1ea7y h\u1ee9a h\u1eb9n.<\/p>","protected":false},"excerpt":{"rendered":"<p>Introduction to Web Scraping and Proxies In the information age, data has become a critical currency, driving business strategies and decision-making processes across industries. An abundance of data is readily accessible on the internet, but extracting it in a useful and structured format can be challenging. This is where web scraping comes into play. Web [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":469254,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[35],"tags":[],"class_list":["post-469315","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles"],"acf":[],"_links":{"self":[{"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/posts\/469315","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/comments?post=469315"}],"version-history":[{"count":1,"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/posts\/469315\/revisions"}],"predecessor-version":[{"id":469328,"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/posts\/469315\/revisions\/469328"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/media\/469254"}],"wp:attachment":[{"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/media?parent=469315"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/categories?post=469315"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/proxycompass.com\/vi\/wp-json\/wp\/v2\/tags?post=469315"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}