{"id":477088,"date":"2023-08-09T09:06:59","date_gmt":"2023-08-09T09:06:59","guid":{"rendered":""},"modified":"2023-09-05T11:13:58","modified_gmt":"2023-09-05T11:13:58","slug":"encapsulating-security-payload","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/encapsulating-security-payload\/","title":{"rendered":"\u0110\u00f3ng g\u00f3i t\u1ea3i tr\u1ecdng b\u1ea3o m\u1eadt"},"content":{"rendered":"<p>\u0110\u00f3ng g\u00f3i t\u1ea3i tr\u1ecdng b\u1ea3o m\u1eadt (ESP) l\u00e0 m\u1ed9t giao th\u1ee9c b\u1ea3o m\u1eadt cung c\u1ea5p s\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa quy\u1ec1n ri\u00eang t\u01b0, t\u00ednh to\u00e0n v\u1eb9n, x\u00e1c th\u1ef1c v\u00e0 b\u1ea3o m\u1eadt d\u1eef li\u1ec7u cho c\u00e1c g\u00f3i d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c g\u1eedi qua m\u1ea1ng IP. N\u00f3 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a b\u1ed9 IPsec (B\u1ea3o m\u1eadt Giao th\u1ee9c Internet) v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c k\u1ebft n\u1ed1i VPN (M\u1ea1ng ri\u00eang \u1ea3o) \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o truy\u1ec1n d\u1eef li\u1ec7u an to\u00e0n qua c\u00e1c m\u1ea1ng kh\u00f4ng \u0111\u00e1ng tin c\u1eady.<\/p>\n<h2>Truy t\u00ecm ngu\u1ed3n g\u1ed1c c\u1ee7a vi\u1ec7c \u0111\u00f3ng g\u00f3i t\u1ea3i tr\u1ecdng b\u1ea3o m\u1eadt<\/h2>\n<p>Kh\u00e1i ni\u1ec7m \u0110\u00f3ng g\u00f3i t\u1ea3i tr\u1ecdng b\u1ea3o m\u1eadt n\u1ed5i l\u00ean nh\u01b0 m\u1ed9t ph\u1ea7n trong n\u1ed7 l\u1ef1c c\u1ee7a L\u1ef1c l\u01b0\u1ee3ng \u0111\u1eb7c nhi\u1ec7m k\u1ef9 thu\u1eadt Internet (IETF) nh\u1eb1m ph\u00e1t tri\u1ec3n IPsec, m\u1ed9t b\u1ed9 giao th\u1ee9c \u0111\u1ec3 b\u1ea3o v\u1ec7 th\u00f4ng tin \u0111\u01b0\u1ee3c truy\u1ec1n qua m\u1ea1ng IP. L\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn ESP c\u00f3 th\u1ec3 b\u1eaft ngu\u1ed3n t\u1eeb n\u0103m 1995 v\u1edbi RFC 1827, sau \u0111\u00f3 \u0111\u00e3 b\u1ecb RFC 2406 l\u1ed7i th\u1eddi v\u00e0o n\u0103m 1998 v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 RFC 4303 v\u00e0o n\u0103m 2005, phi\u00ean b\u1ea3n hi\u1ec7n \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.<\/p>\n<h2>\u0110i s\u00e2u h\u01a1n v\u00e0o vi\u1ec7c \u0111\u00f3ng g\u00f3i t\u1ea3i tr\u1ecdng b\u1ea3o m\u1eadt<\/h2>\n<p>ESP v\u1ec1 c\u01a1 b\u1ea3n l\u00e0 m\u1ed9t c\u01a1 ch\u1ebf \u0111\u00f3ng g\u00f3i v\u00e0 m\u00e3 h\u00f3a c\u00e1c g\u00f3i d\u1eef li\u1ec7u IP \u0111\u1ec3 cung c\u1ea5p t\u00ednh b\u1ea3o m\u1eadt, t\u00ednh to\u00e0n v\u1eb9n v\u00e0 t\u00ednh x\u00e1c th\u1ef1c c\u1ee7a d\u1eef li\u1ec7u. N\u00f3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y b\u1eb1ng c\u00e1ch th\u00eam ti\u00eau \u0111\u1ec1 v\u00e0 \u0111o\u1ea1n gi\u1edbi thi\u1ec7u ESP v\u00e0o g\u00f3i d\u1eef li\u1ec7u g\u1ed1c. Sau \u0111\u00f3, g\u00f3i \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a v\u00e0 x\u00e1c th\u1ef1c t\u00f9y ch\u1ecdn \u0111\u1ec3 ng\u0103n ch\u1eb7n truy c\u1eadp v\u00e0 s\u1eeda \u0111\u1ed5i tr\u00e1i ph\u00e9p.<\/p>\n<p>Trong khi ti\u00eau \u0111\u1ec1 ESP cung c\u1ea5p th\u00f4ng tin c\u1ea7n thi\u1ebft \u0111\u1ec3 h\u1ec7 th\u1ed1ng nh\u1eadn gi\u1ea3i m\u00e3 v\u00e0 x\u00e1c th\u1ef1c d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c, \u0111o\u1ea1n gi\u1edbi thi\u1ec7u ESP bao g\u1ed3m ph\u1ea7n \u0111\u1ec7m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 c\u0103n ch\u1ec9nh trong qu\u00e1 tr\u00ecnh m\u00e3 h\u00f3a v\u00e0 tr\u01b0\u1eddng d\u1eef li\u1ec7u x\u00e1c th\u1ef1c t\u00f9y ch\u1ecdn.<\/p>\n<h2>Ho\u1ea1t \u0111\u1ed9ng b\u00ean trong c\u1ee7a vi\u1ec7c \u0111\u00f3ng g\u00f3i t\u1ea3i tr\u1ecdng b\u1ea3o m\u1eadt<\/h2>\n<p>T\u1ea3i tr\u1ecdng b\u1ea3o m\u1eadt \u0111\u00f3ng g\u00f3i ho\u1ea1t \u0111\u1ed9ng nh\u01b0 sau:<\/p>\n<ol>\n<li>D\u1eef li\u1ec7u g\u1ed1c (t\u1ea3i tr\u1ecdng) \u0111\u01b0\u1ee3c chu\u1ea9n b\u1ecb \u0111\u1ec3 truy\u1ec1n.<\/li>\n<li>Ti\u00eau \u0111\u1ec1 ESP \u0111\u01b0\u1ee3c th\u00eam v\u00e0o \u0111\u1ea7u d\u1eef li\u1ec7u. Ti\u00eau \u0111\u1ec1 n\u00e0y bao g\u1ed3m Ch\u1ec9 m\u1ee5c tham s\u1ed1 b\u1ea3o m\u1eadt (SPI) v\u00e0 s\u1ed1 th\u1ee9 t\u1ef1.<\/li>\n<li>\u0110o\u1ea1n gi\u1edbi thi\u1ec7u ESP \u0111\u01b0\u1ee3c th\u00eam v\u00e0o cu\u1ed1i d\u1eef li\u1ec7u. N\u00f3 ch\u1ee9a ph\u1ea7n \u0111\u1ec7m \u0111\u1ec3 c\u0103n ch\u1ec9nh, \u0111\u1ed9 d\u00e0i ph\u1ea7n \u0111\u1ec7m, ti\u00eau \u0111\u1ec1 ti\u1ebfp theo (cho bi\u1ebft lo\u1ea1i d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c ch\u1ee9a) v\u00e0 d\u1eef li\u1ec7u x\u00e1c th\u1ef1c t\u00f9y ch\u1ecdn.<\/li>\n<li>To\u00e0n b\u1ed9 g\u00f3i (d\u1eef li\u1ec7u g\u1ed1c, ti\u00eau \u0111\u1ec1 ESP v\u00e0 \u0111o\u1ea1n gi\u1edbi thi\u1ec7u ESP) sau \u0111\u00f3 \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a b\u1eb1ng thu\u1eadt to\u00e1n m\u00e3 h\u00f3a \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh.<\/li>\n<li>T\u00f9y ch\u1ecdn, l\u1edbp x\u00e1c th\u1ef1c \u0111\u01b0\u1ee3c th\u00eam v\u00e0o, cung c\u1ea5p t\u00ednh to\u00e0n v\u1eb9n v\u00e0 x\u00e1c th\u1ef1c.<\/li>\n<\/ol>\n<p>Qu\u00e1 tr\u00ecnh n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng tr\u1ecdng t\u1ea3i \u0111\u01b0\u1ee3c gi\u1eef b\u00ed m\u1eadt trong qu\u00e1 tr\u00ecnh v\u1eadn chuy\u1ec3n v\u00e0 \u0111\u1ebfn \u0111\u00edch kh\u00f4ng thay \u0111\u1ed5i v\u00e0 \u0111\u01b0\u1ee3c x\u00e1c minh.<\/p>\n<h2>C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a \u0111\u00f3ng g\u00f3i t\u1ea3i tr\u1ecdng b\u1ea3o m\u1eadt<\/h2>\n<p>C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a ESP bao g\u1ed3m:<\/p>\n<ol>\n<li>T\u00ednh b\u1ea3o m\u1eadt: Th\u00f4ng qua vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c thu\u1eadt to\u00e1n m\u00e3 h\u00f3a m\u1ea1nh m\u1ebd, ESP b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u kh\u1ecfi b\u1ecb truy c\u1eadp tr\u00e1i ph\u00e9p trong qu\u00e1 tr\u00ecnh truy\u1ec1n.<\/li>\n<li>X\u00e1c th\u1ef1c: ESP x\u00e1c minh danh t\u00ednh c\u1ee7a b\u00ean g\u1eedi v\u00e0 b\u00ean nh\u1eadn, \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u kh\u00f4ng b\u1ecb ch\u1eb7n ho\u1eb7c thay \u0111\u1ed5i.<\/li>\n<li>T\u00ednh to\u00e0n v\u1eb9n: ESP \u0111\u1ea3m b\u1ea3o r\u1eb1ng d\u1eef li\u1ec7u kh\u00f4ng b\u1ecb thay \u0111\u1ed5i trong qu\u00e1 tr\u00ecnh truy\u1ec1n.<\/li>\n<li>B\u1ea3o v\u1ec7 ch\u1ed1ng ph\u00e1t l\u1ea1i: V\u1edbi s\u1ed1 th\u1ee9 t\u1ef1, ESP b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng ph\u00e1t l\u1ea1i.<\/li>\n<\/ol>\n<h2>C\u00e1c lo\u1ea1i t\u1ea3i tr\u1ecdng b\u1ea3o m\u1eadt \u0111\u00f3ng g\u00f3i<\/h2>\n<p>C\u00f3 hai ch\u1ebf \u0111\u1ed9 ho\u1ea1t \u0111\u1ed9ng trong ESP: Ch\u1ebf \u0111\u1ed9 v\u1eadn chuy\u1ec3n v\u00e0 ch\u1ebf \u0111\u1ed9 \u0110\u01b0\u1eddng h\u1ea7m.<\/p>\n<table>\n<thead>\n<tr>\n<th>C\u00e1ch th\u1ee9c<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Chuy\u00ean ch\u1edf<\/td>\n<td>\u1ede ch\u1ebf \u0111\u1ed9 n\u00e0y, ch\u1ec9 t\u1ea3i tr\u1ecdng c\u1ee7a g\u00f3i IP \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a v\u00e0 ti\u00eau \u0111\u1ec1 IP g\u1ed1c \u0111\u01b0\u1ee3c gi\u1eef nguy\u00ean. Ch\u1ebf \u0111\u1ed9 n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong giao ti\u1ebfp gi\u1eefa m\u00e1y ch\u1ee7 v\u1edbi m\u00e1y ch\u1ee7.<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u01b0\u1eddng h\u1ea7m<\/td>\n<td>\u1ede ch\u1ebf \u0111\u1ed9 n\u00e0y, to\u00e0n b\u1ed9 g\u00f3i IP \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a v\u00e0 \u0111\u00f3ng g\u00f3i trong g\u00f3i IP m\u1edbi v\u1edbi ti\u00eau \u0111\u1ec1 IP m\u1edbi. Ch\u1ebf \u0111\u1ed9 n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c VPN y\u00eau c\u1ea7u li\u00ean l\u1ea1c an to\u00e0n gi\u1eefa c\u00e1c m\u1ea1ng qua m\u1ea1ng kh\u00f4ng \u0111\u00e1ng tin c\u1eady.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1c \u1ee9ng d\u1ee5ng v\u00e0 th\u00e1ch th\u1ee9c c\u1ee7a vi\u1ec7c \u0111\u00f3ng g\u00f3i t\u1ea3i tr\u1ecdng b\u1ea3o m\u1eadt<\/h2>\n<p>ESP ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong vi\u1ec7c t\u1ea1o c\u00e1c \u0111\u01b0\u1eddng h\u1ea7m m\u1ea1ng an to\u00e0n cho VPN, b\u1ea3o m\u1eadt li\u00ean l\u1ea1c gi\u1eefa c\u00e1c m\u00e1y ch\u1ee7 v\u00e0 trong li\u00ean l\u1ea1c gi\u1eefa c\u00e1c m\u1ea1ng. Tuy nhi\u00ean, n\u00f3 g\u1eb7p ph\u1ea3i nh\u1eefng th\u00e1ch th\u1ee9c nh\u01b0:<\/p>\n<ul>\n<li>Thi\u1ebft l\u1eadp v\u00e0 qu\u1ea3n l\u00fd ph\u1ee9c t\u1ea1p: ESP y\u00eau c\u1ea7u c\u1ea5u h\u00ecnh v\u00e0 qu\u1ea3n l\u00fd kh\u00f3a c\u1ea9n th\u1eadn.<\/li>\n<li>T\u00e1c \u0111\u1ed9ng \u0111\u1ebfn hi\u1ec7u su\u1ea5t: Qu\u00e1 tr\u00ecnh m\u00e3 h\u00f3a v\u00e0 gi\u1ea3i m\u00e3 c\u00f3 th\u1ec3 l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh truy\u1ec1n d\u1eef li\u1ec7u.<\/li>\n<li>S\u1ef1 c\u1ed1 t\u01b0\u01a1ng th\u00edch: M\u1ed9t s\u1ed1 m\u1ea1ng c\u00f3 th\u1ec3 ch\u1eb7n l\u01b0u l\u01b0\u1ee3ng ESP.<\/li>\n<\/ul>\n<p>C\u00e1c gi\u1ea3i ph\u00e1p bao g\u1ed3m:<\/p>\n<ul>\n<li>S\u1eed d\u1ee5ng c\u00e1c giao th\u1ee9c qu\u1ea3n l\u00fd kh\u00f3a t\u1ef1 \u0111\u1ed9ng nh\u01b0 IKE (Internet Key Exchange).<\/li>\n<li>S\u1eed d\u1ee5ng kh\u1ea3 n\u0103ng t\u0103ng t\u1ed1c ph\u1ea7n c\u1ee9ng cho qu\u00e1 tr\u00ecnh m\u00e3 h\u00f3a v\u00e0 gi\u1ea3i m\u00e3.<\/li>\n<li>S\u1eed d\u1ee5ng k\u1ebft h\u1ee3p c\u00e1c k\u1ef9 thu\u1eadt truy\u1ec1n t\u1ea3i ESP v\u00e0 NAT \u0111\u1ec3 v\u01b0\u1ee3t qua c\u00e1c m\u1ea1ng ch\u1eb7n ESP.<\/li>\n<\/ul>\n<h2>So s\u00e1nh v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m<\/h2>\n<p>ESP c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c so s\u00e1nh v\u1edbi b\u1ed9 IPsec \u0111\u1ed3ng h\u00e0nh c\u1ee7a n\u00f3, giao th\u1ee9c Ti\u00eau \u0111\u1ec1 x\u00e1c th\u1ef1c (AH). M\u1eb7c d\u00f9 c\u1ea3 hai \u0111\u1ec1u cung c\u1ea5p t\u00ednh to\u00e0n v\u1eb9n v\u00e0 x\u00e1c th\u1ef1c d\u1eef li\u1ec7u, nh\u01b0ng ch\u1ec9 ESP cung c\u1ea5p t\u00ednh b\u1ea3o m\u1eadt d\u1eef li\u1ec7u th\u00f4ng qua m\u00e3 h\u00f3a. Ngo\u00e0i ra, kh\u00f4ng gi\u1ed1ng nh\u01b0 AH, ESP h\u1ed7 tr\u1ee3 c\u1ea3 hai ch\u1ebf \u0111\u1ed9 v\u1eadn chuy\u1ec3n v\u00e0 v\u1eadn h\u00e0nh \u0111\u01b0\u1eddng h\u1ea7m.<\/p>\n<p>C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh c\u1ee7a ESP bao g\u1ed3m b\u1ea3o m\u1eadt d\u1eef li\u1ec7u, t\u00ednh to\u00e0n v\u1eb9n, x\u00e1c th\u1ef1c v\u00e0 b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1eb7p l\u1ea1i.<\/p>\n<h2>Vi\u1ec5n c\u1ea3nh t\u01b0\u01a1ng lai v\u00e0 c\u00e1c c\u00f4ng ngh\u1ec7 li\u00ean quan<\/h2>\n<p>Khi c\u00e1c m\u1ed1i \u0111e d\u1ecda an ninh m\u1ea1ng ng\u00e0y c\u00e0ng ph\u00e1t tri\u1ec3n, nhu c\u1ea7u v\u1ec1 c\u00e1c giao th\u1ee9c b\u1ea3o m\u1eadt m\u1ea1nh m\u1ebd nh\u01b0 ESP c\u0169ng t\u0103ng theo. D\u1ef1 ki\u1ebfn nh\u1eefng c\u1ea3i ti\u1ebfn trong t\u01b0\u01a1ng lai c\u1ee7a ESP s\u1ebd t\u1eadp trung v\u00e0o vi\u1ec7c n\u00e2ng cao t\u00ednh b\u1ea3o m\u1eadt, hi\u1ec7u su\u1ea5t v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch. C\u00e1c thu\u1eadt to\u00e1n m\u00e3 h\u00f3a ph\u1ee9c t\u1ea1p h\u01a1n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u00e0 c\u00f3 th\u1ec3 t\u00edch h\u1ee3p t\u1ed1t h\u01a1n v\u1edbi c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi n\u1ed5i nh\u01b0 \u0111i\u1ec7n to\u00e1n l\u01b0\u1ee3ng t\u1eed.<\/p>\n<h2>M\u00e1y ch\u1ee7 proxy v\u00e0 \u0111\u00f3ng g\u00f3i t\u1ea3i tr\u1ecdng b\u1ea3o m\u1eadt<\/h2>\n<p>C\u00e1c m\u00e1y ch\u1ee7 proxy, gi\u1ed1ng nh\u01b0 c\u00e1c m\u00e1y ch\u1ee7 do OneProxy cung c\u1ea5p, c\u00f3 th\u1ec3 t\u1eadn d\u1ee5ng ESP \u0111\u1ec3 c\u1ea3i thi\u1ec7n t\u00ednh b\u1ea3o m\u1eadt cho ng\u01b0\u1eddi d\u00f9ng c\u1ee7a h\u1ecd. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng ESP, m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 t\u1ea1o c\u00e1c k\u00eanh an to\u00e0n \u0111\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u, \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c gi\u1eef b\u00ed m\u1eadt, x\u00e1c th\u1ef1c v\u00e0 kh\u00f4ng b\u1ecb thay \u0111\u1ed5i. H\u01a1n n\u1eefa, ESP c\u00f3 th\u1ec3 cung c\u1ea5p m\u1ed9t l\u1edbp b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng nh\u1eafm v\u00e0o m\u00e1y ch\u1ee7 proxy v\u00e0 ng\u01b0\u1eddi d\u00f9ng c\u1ee7a ch\u00fang.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin chi ti\u1ebft v\u1ec1 \u0110\u00f3ng g\u00f3i t\u1ea3i tr\u1ecdng b\u1ea3o m\u1eadt, h\u00e3y xem x\u00e9t c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n<ol>\n<li><a href=\"https:\/\/tools.ietf.org\/html\/rfc4303\" target=\"_new\" rel=\"noopener nofollow\">IETF RFC 4303 \u2013 T\u1ea3i tr\u1ecdng b\u1ea3o m\u1eadt \u0111\u00f3ng g\u00f3i IP (ESP)<\/a><\/li>\n<li><a href=\"https:\/\/tools.ietf.org\/html\/rfc7296\" target=\"_new\" rel=\"noopener nofollow\">Giao th\u1ee9c trao \u0111\u1ed5i kh\u00f3a Internet (IKEv2)<\/a><\/li>\n<li><a href=\"https:\/\/www.ipsec.info\/\" target=\"_new\" rel=\"noopener nofollow\">Trang IPsec<\/a><\/li>\n<li><a href=\"https:\/\/datatracker.ietf.org\/wg\/ipsecme\/about\/\" target=\"_new\" rel=\"noopener nofollow\">Nh\u00f3m l\u00e0m vi\u1ec7c IETF IPsec<\/a><\/li>\n<\/ol>","protected":false},"featured_media":477089,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-477088","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Encapsulating Security Payload: A Comprehensive Insight<\/mark>","faq_items":[{"question":"What is Encapsulating Security Payload?","answer":"<p>Encapsulating Security Payload (ESP) is a protocol that provides security for data packets sent over an IP network. It's part of the IPsec suite and is widely used in Virtual Private Networks (VPNs) to ensure secure data transmission.<\/p>"},{"question":"When was the Encapsulating Security Payload first mentioned?","answer":"<p>The first mention of the Encapsulating Security Payload (ESP) can be traced back to 1995 with RFC 1827. It was then updated by RFC 2406 in 1998, and finally by RFC 4303 in 2005, which is the version currently in use.<\/p>"},{"question":"How does the Encapsulating Security Payload work?","answer":"<p>The Encapsulating Security Payload (ESP) works by appending an ESP header and trailer to the original data packet, which is then encrypted and optionally authenticated. This ensures the payload remains confidential while in transit and arrives at the destination unaltered and verified.<\/p>"},{"question":"What are the key features of Encapsulating Security Payload?","answer":"<p>The key features of ESP include confidentiality, authentication, integrity, and anti-replay protection. It protects the data from unauthorized access, verifies the identity of the sending and receiving parties, ensures the data remains unaltered, and protects against replay attacks.<\/p>"},{"question":"What types of Encapsulating Security Payload exist?","answer":"<p>There are two modes of operation in ESP: Transport mode and Tunnel mode. In Transport mode, only the payload of the IP packet is encrypted, leaving the original IP header intact. In Tunnel mode, the entire IP packet is encrypted and encapsulated within a new IP packet with a new IP header.<\/p>"},{"question":"What are some challenges related to the use of Encapsulating Security Payload?","answer":"<p>Challenges associated with ESP include its complex setup and management, performance impact due to encryption and decryption processes, and compatibility issues as some networks may block ESP traffic.<\/p>"},{"question":"How can proxy servers use Encapsulating Security Payload?","answer":"<p>Proxy servers can use ESP to improve security for their users. By employing ESP, proxy servers can create secure channels for data transmission, ensuring that the data remains confidential, authentic, and unaltered.<\/p>"},{"question":"What future technologies could be related to Encapsulating Security Payload?","answer":"<p>Future improvements to ESP will likely focus on enhancing security, performance, and compatibility. Emerging technologies, such as more sophisticated encryption algorithms and quantum computing, may have better integration with ESP.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/477088","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\/477088\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/477089"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=477088"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}