{"id":713,"date":"2022-10-05T20:31:15","date_gmt":"2022-10-05T20:31:15","guid":{"rendered":"https:\/\/securitybriefing.net\/?p=713"},"modified":"2022-10-05T20:31:15","modified_gmt":"2022-10-05T20:31:15","slug":"gioi-thieu-ve-openvpn","status":"publish","type":"post","link":"https:\/\/securitybriefing.net\/vi\/mang-rieng-ao\/gioi-thieu-ve-openvpn\/","title":{"rendered":"Gi\u1edbi thi\u1ec7u v\u1ec1 OpenVPN"},"content":{"rendered":"<p>Internet c\u0169ng quan tr\u1ecdng nh\u01b0 b\u1ea5t k\u1ef3 d\u1ecbch v\u1ee5 c\u00f4ng c\u1ed9ng n\u00e0o kh\u00e1c tr\u00ean th\u1ebf gi\u1edbi ng\u00e0y nay. \u0110i\u1ec1u \u0111\u1ea7u ti\u00ean m\u00e0 m\u1ecdi ng\u01b0\u1eddi ngh\u0129 \u0111\u1ebfn khi mua nh\u00e0 m\u1edbi ho\u1eb7c m\u1edf c\u00f4ng ty \u1edf m\u1ed9t \u0111\u1ecba \u0111i\u1ec3m m\u1edbi l\u00e0 k\u1ebft n\u1ed1i internet \u0111\u00e1ng tin c\u1eady, ti\u1ebfp theo l\u00e0 \u0111i\u1ec7n, h\u1ec7 th\u1ed1ng s\u01b0\u1edfi, thu gom r\u00e1c v\u00e0 (nh\u01b0ng kh\u00f4ng nh\u1ea5t thi\u1ebft) d\u1ecbch v\u1ee5 \u0111i\u1ec7n tho\u1ea1i.<\/p>\n<p>M\u1ed9t s\u1ed1 ng\u01b0\u1eddi c\u00f3 th\u1ec3 cho r\u1eb1ng c\u1ee5m t\u1eeb \u201cth\u1ebf gi\u1edbi th\u1ee9 ba\u201d l\u00e0 kh\u00f4ng \u0111\u00fang v\u00e0 x\u00fac ph\u1ea1m. V\u1edbi c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh nh\u01b0 \u201cM\u1ed7i tr\u1ebb em m\u1ed9t m\u00e1y t\u00ednh x\u00e1ch tay\u201d v\u00e0 c\u00e1c s\u00e1ng ki\u1ebfn c\u1ee7a c\u00e1c c\u00f4ng ty nh\u01b0 Facebook v\u00e0 Google, nhi\u1ec1u qu\u1ed1c gia \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 th\u1ebf gi\u1edbi th\u1ee9 ba hi\u1ec7n c\u00f3 th\u1ec3 truy c\u1eadp internet m\u00e0 kh\u00f4ng c\u1ea7n n\u01b0\u1edbc m\u00e1y ho\u1eb7c h\u1ec7 th\u1ed1ng tho\u00e1t n\u01b0\u1edbc.<\/p>\n<p>Nh\u01b0ng c\u00e1i t\u1ed1t \u0111i k\u00e8m c\u00e1i x\u1ea5u. M\u1eb7c d\u00f9 b\u1ea5t k\u1ef3 ai c\u0169ng c\u00f3 th\u1ec3 l\u1eadp trang web, t\u1ea1o t\u00e0i kho\u1ea3n Facebook ho\u1eb7c m\u1edf t\u00e0i kho\u1ea3n Twitter, nh\u01b0ng kh\u00f4ng ph\u1ea3i ai c\u0169ng l\u00e0m nh\u01b0 v\u1eady v\u1edbi m\u1ee5c \u0111\u00edch t\u1ed1t, bao g\u1ed3m c\u1ea3 tin t\u1eb7c v\u00e0 t\u1ed9i ph\u1ea1m. Khi c\u00f3 nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng, nguy c\u01a1 ai \u0111\u00f3 c\u1ed1 g\u1eafng khai th\u00e1c h\u1ec7 th\u1ed1ng \u0111\u1ec3 tr\u1ee5c l\u1ee3i c\u00e1 nh\u00e2n s\u1ebd t\u0103ng l\u00ean.<\/p>\n<p>OpenVPN l\u00e0 m\u1ed9t d\u1ef1 \u00e1n m\u00e3 ngu\u1ed3n m\u1edf b\u1eaft \u0111\u1ea7u v\u00e0o n\u0103m 2002 v\u1edbi m\u1ee5c \u0111\u00edch t\u1ea1o ra m\u1ed9t gi\u1ea3i ph\u00e1p VPN SSL \u0111\u1ea7y \u0111\u1ee7 t\u00ednh n\u0103ng. OpenVPN m\u00e3 h\u00f3a d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c g\u1eedi qua c\u00e1c m\u1ea1ng, \u0111i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng khi nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng \u1edf c\u00f9ng m\u1ed9t m\u1ea1ng.<\/p>\n<h2 id=\"the-history-of-interceptions-and-how-theyve-progressed-over-time\"><strong>L\u1ecbch s\u1eed c\u1ee7a c\u00e1c v\u1ee5 ch\u1eb7n b\u1eaft v\u00e0 c\u00e1ch ch\u00fang di\u1ec5n ra theo th\u1eddi gian<\/strong><\/h2>\n<p>Theo truy\u1ec1n th\u1ed1ng, b\u1ea1n c\u00f3 th\u1ec3 tin t\u01b0\u1edfng v\u00e0o m\u1ed9t th\u00f4ng \u0111i\u1ec7p kh\u00f4ng b\u1ecb thay \u0111\u1ed5i n\u1ebfu n\u00f3 \u0111\u01b0\u1ee3c g\u1eedi trong m\u1ed9t l\u00e1 th\u01b0 ni\u00eam phong b\u1eb1ng s\u00e1p b\u1edfi m\u1ed9t ng\u01b0\u1eddi \u0111\u00e1ng tin c\u1eady. Tuy nhi\u00ean, theo th\u1eddi gian, vi\u1ec7c ch\u1eb7n th\u01b0 tr\u1edf n\u00ean \u0111\u01a1n gi\u1ea3n h\u01a1n: Ng\u01b0\u1eddi g\u1eedi c\u00f3 th\u1ec3 \u0111\u1ecdc ho\u1eb7c s\u1eeda \u0111\u1ed5i n\u00f3 tr\u01b0\u1edbc khi chuy\u1ec3n \u0111i.<\/p>\n<p>Nh\u1eefng ti\u1ebfn b\u1ed9 c\u00f4ng ngh\u1ec7 trong Th\u1ebf chi\u1ebfn II cho ph\u00e9p c\u1ea3 hai b\u00ean b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u c\u1ee7a m\u00ecnh an to\u00e0n h\u01a1n th\u00f4ng qua c\u00e1c v\u00ed d\u1ee5 nh\u01b0 m\u00e1y Enigma v\u00e0 m\u00e1y n\u00f3i m\u00e3 Navajo. Sau chi\u1ebfn tranh, ch\u00ednh ph\u1ee7 Hoa K\u1ef3 \u0111\u00e3 s\u1eed d\u1ee5ng nh\u1eefng k\u1ef9 thu\u1eadt n\u00e0y v\u00e0 c\u00e1c k\u1ef9 thu\u1eadt kh\u00e1c \u0111\u1ec3 b\u1ea3o v\u1ec7 th\u00f4ng tin c\u1ee7a m\u00ecnh.<\/p>\n<p>Khi th\u1eddi gian tr\u00f4i qua v\u00e0 c\u00f4ng ngh\u1ec7 ph\u00e1t tri\u1ec3n, c\u1ea7n c\u00f3 nh\u1eefng c\u00e1ch m\u1edbi \u0111\u1ec3 gi\u1eef d\u1eef li\u1ec7u an to\u00e0n, \u0111\u00f3 l\u00e0 l\u00fac OpenVPN xu\u1ea5t hi\u1ec7n. OpenVPN s\u1eed d\u1ee5ng s\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa m\u1eadt m\u00e3 kh\u00f3a c\u00f4ng khai v\u00e0 SSL\/TLS \u0111\u1ec3 trao \u0111\u1ed5i kh\u00f3a. OpenVPN c\u00f3 th\u1ec3 ch\u1ea1y qua Giao th\u1ee9c d\u1eef li\u1ec7u ng\u01b0\u1eddi d\u00f9ng (UDP) ho\u1eb7c Giao th\u1ee9c \u0111i\u1ec1u khi\u1ec3n truy\u1ec1n (TCP). OpenVPN cung c\u1ea5p nhi\u1ec1u t\u00ednh n\u0103ng, ch\u1eb3ng h\u1ea1n nh\u01b0 \u0111\u01b0\u1eddng h\u1ea7m l\u01b0u l\u01b0\u1ee3ng IPv4 ho\u1eb7c IPv6, ch\u1ea1y qua m\u1ed9t c\u1ed5ng duy nh\u1ea5t v\u00e0 nhi\u1ec1u t\u00ednh n\u0103ng kh\u00e1c.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-765\" style=\"color: #222222; font-family: Verdana, BlinkMacSystemFont, -apple-system, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif; font-size: 15px;\" src=\"http:\/\/securitybriefing.net\/wp-content\/uploads\/2022\/10\/Open-VPN-banner-min.png\" alt=\"M\u1edf bi\u1ec3u ng\u1eef VPN\" width=\"800\" height=\"450\" srcset=\"https:\/\/securitybriefing.net\/wp-content\/uploads\/2022\/10\/Open-VPN-banner-min.png 800w, https:\/\/securitybriefing.net\/wp-content\/uploads\/2022\/10\/Open-VPN-banner-min-300x169.png 300w, https:\/\/securitybriefing.net\/wp-content\/uploads\/2022\/10\/Open-VPN-banner-min-768x432.png 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2><strong>Phi\u00ean b\u1ea3n c\u1ed9ng \u0111\u1ed3ng &amp; <\/strong><strong>Ti\u1ebfng k\u00eau<\/strong><strong>Giao th\u1ee9c \u0111\u01b0\u1eddng h\u1ea7m nVPN<\/strong><\/h2>\n<p>OpenVPN c\u00f3 hai phi\u00ean b\u1ea3n:\u00a0<em>Phi\u00ean b\u1ea3n c\u1ed9ng \u0111\u1ed3ng OpenVPN<\/em>, mi\u1ec5n ph\u00ed v\u00e0 m\u00e3 ngu\u1ed3n m\u1edf, v\u00e0\u00a0<em>Giao th\u1ee9c \u0111\u01b0\u1eddng h\u1ea7m OpenVPN, l\u00e0 m\u1ed9t s\u1ea3n ph\u1ea9m th\u01b0\u01a1ng m\u1ea1i.<\/em><\/p>\n<h3 id=\"openvpn-community-edition\"><strong>Phi\u00ean b\u1ea3n c\u1ed9ng \u0111\u1ed3ng OpenVPN<\/strong><\/h3>\n<p>OpenVPN l\u00e0 m\u1ed9t d\u1ef1 \u00e1n m\u00e3 ngu\u1ed3n m\u1edf m\u00e0 b\u1ea5t k\u1ef3 ai c\u0169ng c\u00f3 th\u1ec3 \u0111\u00f3ng g\u00f3p v\u00e0 ch\u1ea1y theo gi\u1ea5y ph\u00e9p GPL. Thi\u1ebft l\u1eadp CE mi\u1ec5n ph\u00ed n\u1ebfu b\u1ea1n quen thu\u1ed9c v\u1edbi Linux v\u00e0 giao di\u1ec7n d\u00f2ng l\u1ec7nh.<\/p>\n<p>Phi\u00ean b\u1ea3n c\u1ed9ng \u0111\u1ed3ng OpenVPN c\u00f3 s\u1eb5n \u0111\u1ec3 t\u1ea3i xu\u1ed1ng tr\u00ean trang web OpenVPN.<\/p>\n<h3 id=\"openvpn-tunneling-protocol\"><strong>Giao th\u1ee9c \u0111\u01b0\u1eddng h\u1ea7m OpenVPN<\/strong><\/h3>\n<p>Giao th\u1ee9c \u0111\u01b0\u1eddng h\u1ea7m OpenVPN s\u1eed d\u1ee5ng m\u00e3 h\u00f3a SSL \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7. \u0110i\u1ec1u n\u00e0y l\u00e0 do m\u00e3 h\u00f3a AES-256 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng, \u0111\u00e2y l\u00e0 ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c ch\u00ednh ph\u1ee7 Hoa K\u1ef3 s\u1eed d\u1ee5ng. M\u00e3 \u0111\u1ec3 ki\u1ec3m tra c\u00f3 s\u1eb5n cho m\u1ecdi ng\u01b0\u1eddi. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 m\u1ecdi ng\u01b0\u1eddi c\u00f3 th\u1ec3 t\u00ecm v\u00e0 s\u1eeda c\u00e1c l\u1ed7 h\u1ed5ng. Ngo\u00e0i ra, giao th\u1ee9c cung c\u1ea5p k\u1ebft n\u1ed1i nhanh h\u01a1n v\u00e0 c\u00f3 th\u1ec3 v\u01b0\u1ee3t qua h\u1ea7u h\u1ebft c\u00e1c t\u01b0\u1eddng l\u1eeda.<\/p>\n<p>Nh\u1eefng l\u1ee3i \u00edch kh\u00e1c c\u1ee7a Giao th\u1ee9c \u0111\u01b0\u1eddng h\u1ea7m OpenVPN bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>H\u1ed7 tr\u1ee3:<\/strong>\u00a0Windows, macOS, Linux, iOS, Android<\/li>\n<li><strong>K\u1ebft n\u1ed1i<\/strong>: T\u1ed1i \u0111a 5 thi\u1ebft b\u1ecb v\u1edbi t\u1ed1c \u0111\u1ed9 nhanh h\u01a1n v\u1edbi OpenVPN 2.4P<\/li>\n<li><strong>\u0110\u00e0o h\u1ea7m:<\/strong>\u00a0Giao th\u1ee9c \u0111\u01b0\u1eddng h\u1ea7m OpenVPN c\u00f3 th\u1ec3 t\u1ea1o \u0111\u01b0\u1eddng h\u1ea7m qua t\u01b0\u1eddng l\u1eeda v\u00e0 NAT<\/li>\n<li><strong>Giao di\u1ec7n l\u1eadp tr\u00ecnh \u1ee9ng d\u1ee5ng (API)<\/strong>: API d\u1ec5 s\u1eed d\u1ee5ng cho c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n<\/li>\n<\/ul>\n<h2 id=\"what-is-a-vpn\"><strong>VPN l\u00e0 g\u00ec?<\/strong><\/h2>\n<p>Ng\u01b0\u1eddi qu\u1ea3n tr\u1ecb c\u00f3 th\u1ec3 k\u1ebft n\u1ed1i m\u1ed9t v\u00e0i m\u00e1y t\u00ednh tr\u00ean c\u00e1c m\u1ea1ng kh\u00e1c nhau \u0111\u1ec3 t\u1ea1o ra \u1ea3o gi\u00e1c r\u1eb1ng ch\u00fang chia s\u1ebb c\u00f9ng m\u1ed9t m\u1ea1ng c\u1ee5c b\u1ed9. C\u00e1c m\u00e1y c\u00f3 th\u1ec3 \u1edf c\u00f9ng m\u1ed9t ph\u00f2ng, \u1edf hai b\u00ean th\u1ebf gi\u1edbi ho\u1eb7c s\u1eed d\u1ee5ng nhi\u1ec1u lo\u1ea1i k\u1ebft n\u1ed1i kh\u00e1c nhau, ch\u1eb3ng h\u1ea1n nh\u01b0 k\u1ebft n\u1ed1i kh\u00f4ng d\u00e2y, v\u1ec7 tinh v\u00e0 k\u1ebft n\u1ed1i quay s\u1ed1.<\/p>\n<p>Ch\u1eef \u201cP\u201d trong VPN l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a quy\u1ec1n ri\u00eang t\u01b0, do \u0111\u00f3 m\u1ea1ng \u1ea3o \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 VPN. \u0110\u01b0\u1eddng h\u1ea7m (VPN) \u0111\u1ec1 c\u1eadp \u0111\u1ebfn l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng \u0111i qua VPN, trong khi t\u1ea5t c\u1ea3 l\u01b0u l\u01b0\u1ee3ng kh\u00e1c \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 b\u00ean ngo\u00e0i \u0111\u01b0\u1eddng h\u1ea7m.<\/p>\n<p>Bi\u1ec3u \u0111\u1ed3 sau \u0111\u00e2y cho th\u1ea5y l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng di chuy\u1ec3n qua nhi\u1ec1u ph\u1ea7n c\u1ee7a m\u1ea1ng v\u00e0 internet nh\u01b0 th\u1ebf n\u00e0o. V\u00ec HTTPS v\u00e0 SSH l\u00e0 c\u00e1c giao th\u1ee9c truy\u1ec1n th\u00f4ng an to\u00e0n h\u01a1n n\u00ean vi\u1ec7c ph\u00e2n t\u00edch lo\u1ea1i d\u1eef li\u1ec7u n\u00e0y d\u1ec5 d\u00e0ng h\u01a1n nhi\u1ec1u. Ai \u0111\u00f3 ph\u1ea3i t\u1ea5n c\u00f4ng l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh lo\u1ea1i k\u1ebft n\u1ed1i n\u00e0o \u0111ang \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp t\u1eeb m\u00e1y t\u00ednh n\u00e0o \u0111\u1ebfn m\u00e1y ch\u1ee7 n\u00e0o, ngay c\u1ea3 khi ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c nh\u00ecn th\u1ea5y.<\/p>\n<p>Khi s\u1eed d\u1ee5ng VPN, l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp b\u00ean trong \u0111\u01b0\u1eddng h\u1ea7m s\u1ebd kh\u00f4ng c\u00f2n c\u00f3 th\u1ec3 nh\u1eadn d\u1ea1ng \u0111\u01b0\u1ee3c n\u1eefa.<\/p>\n<h2 id=\"which-traffic-can-be-routed-through-a-vpn\"><strong>L\u01b0u l\u01b0\u1ee3ng n\u00e0o c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ecbnh tuy\u1ebfn qua VPN?<\/strong><\/h2>\n<p>M\u1ea1ng ri\u00eang \u1ea3o (VPN) c\u00f3 th\u1ec3 m\u00e3 h\u00f3a v\u00e0 t\u1ea1o \u0111\u01b0\u1eddng h\u1ea7m cho b\u1ea5t k\u1ef3 lo\u1ea1i l\u01b0u l\u01b0\u1ee3ng n\u00e0o, bao g\u1ed3m h\u00ecnh \u1ea3nh, phim, l\u01b0\u1edbt web, g\u1eedi email v\u00e0 nh\u1eafn tin. M\u1ed9t s\u1ed1 ch\u01b0\u01a1ng tr\u00ecnh ph\u1ed5 bi\u1ebfn s\u1eed d\u1ee5ng VPN l\u00e0:<\/p>\n<p><strong>M\u00e1y ATM<\/strong>:B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng VPN, c\u00e1c m\u00e1y ATM c\u00f3 th\u1ec3 k\u1ebft n\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng ng\u00e2n h\u00e0ng v\u1edbi m\u1ee9c \u0111\u1ed9 b\u1ea3o m\u1eadt cao h\u01a1n.<\/p>\n<p><strong>Wi-Fi c\u00f4ng c\u1ed9ng<\/strong>:M\u1ea1ng Wi-Fi c\u00f4ng c\u1ed9ng l\u00e0 \u1ed5 ch\u1ee9a ti\u1ec1m n\u0103ng cho c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng b\u1ea3o m\u1eadt. B\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng VPN, b\u1ea1n c\u00f3 th\u1ec3 m\u00e3 h\u00f3a l\u01b0u l\u01b0\u1ee3ng truy c\u1eadp c\u1ee7a m\u00ecnh \u0111\u1ec3 kh\u00f4ng ai c\u00f3 th\u1ec3 theo d\u00f5i d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n.<\/p>\n<p><strong>M\u1ea1ng gia \u0111\u00ecnh<\/strong>: B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng VPN \u0111\u1ec3 k\u1ebft n\u1ed1i v\u1edbi m\u1ea1ng gia \u0111\u00ecnh \u1edf b\u1ea5t k\u1ef3 \u0111\u00e2u. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch n\u1ebfu b\u1ea1n c\u00f3 m\u1ed9t ng\u00f4i nh\u00e0 th\u00f4ng minh v\u1edbi c\u00e1c thi\u1ebft b\u1ecb c\u1ea7n \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi m\u1ea1ng gia \u0111\u00ecnh, ch\u1eb3ng h\u1ea1n nh\u01b0 camera an ninh ho\u1eb7c h\u1ec7 th\u1ed1ng t\u1ef1 \u0111\u1ed9ng h\u00f3a gia \u0111\u00ecnh.<\/p>\n<p><strong>B\u1ecf qua ki\u1ec3m duy\u1ec7t qu\u1ed1c gia:<\/strong>\u00a0\u0110\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi s\u1ed1ng trong ch\u1ebf \u0111\u1ed9 \u00e1p b\u1ee9c, ch\u1eb3ng h\u1ea1n nh\u01b0 B\u1eafc Tri\u1ec1u Ti\u00ean ho\u1eb7c Trung Qu\u1ed1c, ki\u1ec3m duy\u1ec7t t\u1eeb c\u00e1c l\u1ec7nh phong t\u1ecfa c\u1ee7a ch\u00ednh ph\u1ee7 l\u00e0 m\u1ed1i quan t\u00e2m c\u1ea5p b\u00e1ch. &quot;B\u1ee9c t\u01b0\u1eddng l\u1eeda v\u0129 \u0111\u1ea1i c\u1ee7a Trung Qu\u1ed1c&quot; ng\u0103n c\u1ea3n c\u00f4ng d\u00e2n truy c\u1eadp v\u00e0o th\u1ebf gi\u1edbi b\u00ean ngo\u00e0i v\u00e0 nh\u1eadn tin t\u1ee9c v\u00e0 th\u00f4ng tin c\u00f3 th\u1ec3 g\u00e2y ra s\u1ef1 n\u1ed5i lo\u1ea1n\u2014VPN cung c\u1ea5p m\u1ed9t c\u00e1ch \u0111\u1ec3 v\u01b0\u1ee3t qua nh\u1eefng h\u1ea1n ch\u1ebf n\u00e0y.<\/p>\n<p><strong>M\u1ea1ng l\u01b0\u1edbi kinh doanh<\/strong>: C\u00e1c t\u1eadp \u0111o\u00e0n v\u00e0 t\u1ed5 ch\u1ee9c kh\u00e1c c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng VPN \u0111\u1ec3 k\u1ebft n\u1ed1i nhi\u1ec1u \u0111\u1ecba \u0111i\u1ec3m v\u0103n ph\u00f2ng ho\u1eb7c th\u1eadm ch\u00ed to\u00e0n b\u1ed9 trung t\u00e2m d\u1eef li\u1ec7u. B\u1eb1ng c\u00e1ch \u0111\u00f3, h\u1ecd c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n giao ti\u1ebfp v\u00e0 c\u1ed9ng t\u00e1c gi\u1eefa c\u00e1c nh\u00e2n vi\u00ean \u0111\u1ed3ng th\u1eddi b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m.<\/p>\n<p><strong>D\u1ecbch v\u1ee5 GeoIP<\/strong>: M\u1ed9t s\u1ed1 trang web, bao g\u1ed3m Hulu, YouTube v\u00e0 Netflix, s\u1eed d\u1ee5ng c\u01a1 s\u1edf d\u1eef li\u1ec7u GeoIP v\u00e0 c\u00e1c b\u1ea3n ghi kh\u00e1c \u0111\u1ec3 ph\u00e2n ph\u1ed1i n\u1ed9i dung d\u1ef1a tr\u00ean v\u1ecb tr\u00ed. B\u1ea1n c\u00f3 th\u1ec3 truy c\u1eadp t\u00e0i li\u1ec7u kh\u00f4ng kh\u1ea3 d\u1ee5ng trong khu v\u1ef1c c\u1ee7a m\u00ecnh b\u1eb1ng c\u00e1ch &quot;ph\u1ea3n h\u1ed3i&quot; k\u1ebft n\u1ed1i m\u00e1y t\u00ednh c\u1ee7a b\u1ea1n qua m\u00e1y ch\u1ee7 VPN g\u1ea7n h\u01a1n v\u1edbi khu v\u1ef1c \u0111\u1ecba l\u00fd mong mu\u1ed1n. Ngo\u00e0i ra, VPN s\u1ebd b\u1ea3o v\u1ec7 b\u1ea1n kh\u1ecfi m\u1ecdi h\u00ecnh ph\u1ea1t ph\u00e1p l\u00fd li\u00ean quan \u0111\u1ebfn vi\u1ec7c xem phim b\u1ecb c\u1ea5m ho\u1eb7c ch\u01b0\u01a1ng tr\u00ecnh truy\u1ec1n h\u00ecnh c\u00f3 b\u1ea3n quy\u1ec1n.<\/p>\n<p>\u0110\u01b0\u1eddng h\u1ea7m ri\u00eang t\u01b0 ho\u00e0n to\u00e0n b\u1ecb c\u00f4 l\u1eadp kh\u1ecfi internet c\u00f4ng c\u1ed9ng. M\u1eb7c d\u00f9 VPN t\u1ef1 di chuy\u1ec3n qua internet nh\u01b0 trong h\u00ecnh tr\u00ean, c\u00e1c thi\u1ebft b\u1ecb d\u1ecdc theo tuy\u1ebfn \u0111\u01b0\u1eddng c\u1ee7a n\u00f3 s\u1ebd ch\u1ec9 c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y l\u01b0u l\u01b0\u1ee3ng VPN; ch\u00fang s\u1ebd kh\u00f4ng bi\u1ebft nh\u1eefng g\u00ec \u0111ang \u0111\u01b0\u1ee3c truy\u1ec1n b\u00ean trong \u0111\u01b0\u1eddng h\u1ea7m an to\u00e0n. \u0110\u00f3 l\u00e0 v\u00ec VPN kh\u00f4ng ch\u1ec9 m\u00e3 h\u00f3a l\u01b0u l\u01b0\u1ee3ng b\u00ean trong m\u00e0 c\u00f2n m\u00e3 h\u00f3a c\u00e1c lu\u1ed3ng d\u1eef li\u1ec7u ri\u00eang l\u1ebb t\u1eeb nh\u1eefng ng\u01b0\u1eddi d\u00f9ng kh\u00e1c b\u00ean ngo\u00e0i n\u00f3. N\u00f3i c\u00e1ch kh\u00e1c, ngay c\u1ea3 khi ai \u0111\u00f3 c\u00f3 th\u1ec3 ch\u1eb7n m\u1ed9t trong nh\u1eefng lu\u1ed3ng d\u1eef li\u1ec7u n\u00e0y, h\u1ecd s\u1ebd kh\u00f4ng th\u1ec3 gi\u1ea3i m\u00e3 n\u00f3 v\u00ec VPN v\u1eabn s\u1ebd m\u00e3 h\u00f3a n\u00f3.<\/p>\n<p>B\u1ed9 \u0111\u1ecbnh tuy\u1ebfn v\u00e0 t\u01b0\u1eddng l\u1eeda \u1edf c\u1ea3 hai b\u00ean t\u1ea1o ra \u0111\u01b0\u1eddng h\u1ea7m. N\u1ebfu b\u1ea1n kh\u00f4ng th\u1ef1c hi\u1ec7n c\u00e1c bi\u1ec7n ph\u00e1p \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 ki\u1ec3m so\u00e1t l\u01b0u l\u01b0\u1ee3ng VPN, t\u1ea5t c\u1ea3 l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng \u0111i qua \u0111\u01b0\u1eddng h\u1ea7m VPN s\u1ebd b\u1ecf qua m\u1ecdi bi\u1ec7n ph\u00e1p b\u1ea3o m\u1eadt th\u00f4ng th\u01b0\u1eddng.<\/p>\n<h2 id=\"data-encryption-and-authentication\"><strong>M\u00e3 h\u00f3a v\u00e0 x\u00e1c th\u1ef1c d\u1eef li\u1ec7u<\/strong><\/h2>\n<p>VPN s\u1eed d\u1ee5ng m\u00e3 h\u00f3a v\u00e0 x\u00e1c th\u1ef1c \u0111\u1ec3 ng\u0103n ng\u01b0\u1eddi kh\u00e1c nh\u00ecn th\u1ea5y d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n. M\u00e3 h\u00f3a l\u00e0m cho d\u1eef li\u1ec7u kh\u00f3 hi\u1ec3u v\u00e0 x\u00e1c th\u1ef1c \u0111\u1ea3m b\u1ea3o r\u1eb1ng ch\u1ec9 nh\u1eefng ng\u01b0\u1eddi ph\u00f9 h\u1ee3p m\u1edbi c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y d\u1eef li\u1ec7u.<\/p>\n<p>L\u1edbp b\u1ea3o m\u1eadt \u0111\u1ea7u ti\u00ean l\u00e0 x\u00e1c th\u1ef1c, x\u00e1c minh r\u1eb1ng ch\u1ec9 nh\u1eefng ng\u01b0\u1eddi d\u00f9ng \u0111\u01b0\u1ee3c \u1ee7y quy\u1ec1n m\u1edbi c\u00f3 th\u1ec3 truy c\u1eadp d\u1ecbch v\u1ee5. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng ch\u1ee9ng ch\u1ec9 cho m\u1ed7i ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c t\u00ean ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u1eadt kh\u1ea9u. Sau \u0111\u00f3, ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 thi\u1ebft l\u1eadp c\u00e1c h\u1ea1n ch\u1ebf c\u1ee7a ri\u00eang h\u1ecd, ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e1c tuy\u1ebfn \u0111\u01b0\u1eddng nh\u1ea5t \u0111\u1ecbnh ho\u1eb7c c\u00e0i \u0111\u1eb7t t\u01b0\u1eddng l\u1eeda. Nh\u1eefng h\u1ea1n ch\u1ebf n\u00e0y th\u01b0\u1eddng ch\u1ec9 gi\u1edbi h\u1ea1n trong m\u1ed9t l\u1ea7n c\u00e0i \u0111\u1eb7t; tuy nhi\u00ean, ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00f9y ch\u1ec9nh.<\/p>\n<p>Th\u1ee9 hai, ch\u00fang ta c\u1ea7n b\u1ea3o v\u1ec7 k\u00eanh truy\u1ec1n th\u00f4ng nhi\u1ec1u h\u01a1n. \u0110\u1ec3 l\u00e0m \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y, ch\u00fang ta s\u1ebd k\u00fd m\u1ed7i g\u00f3i tin \u0111\u01b0\u1ee3c truy\u1ec1n \u0111i. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 m\u1ed7i h\u1ec7 th\u1ed1ng s\u1ebd x\u00e1c minh r\u1eb1ng c\u00e1c g\u00f3i tin VPN m\u00e0 n\u00f3 nh\u1eadn \u0111\u01b0\u1ee3c \u0111\u00e3 \u0111\u01b0\u1ee3c k\u00fd \u0111\u00fang c\u00e1ch. B\u1eb1ng c\u00e1ch x\u00e1c th\u1ef1c c\u00e1c g\u00f3i tin \u0111\u00e3 \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a, h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 ti\u1ebft ki\u1ec7m th\u1eddi gian x\u1eed l\u00fd b\u1eb1ng c\u00e1ch kh\u00f4ng gi\u1ea3i m\u00e3 c\u00e1c g\u00f3i tin kh\u00f4ng \u0111\u00e1p \u1ee9ng ti\u00eau ch\u00ed x\u00e1c th\u1ef1c. N\u1ebfu ch\u00fang ta gi\u1eef an to\u00e0n cho c\u00e1c kh\u00f3a k\u00fd, \u0111i\u1ec1u n\u00e0y s\u1ebd ng\u0103n ch\u1eb7n c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5!<\/p>\n<h2 id=\"pptp-vs-openvpn\"><strong>PPTP so v\u1edbi OpenVPN<\/strong><\/h2>\n<p>\u0110\u01b0\u1ee3c ph\u00e1t tri\u1ec3n b\u1edfi Microsoft, PPTP (Point-to-Point Tunneling Protocol) l\u00e0 m\u1ed9t trong nh\u1eefng giao th\u1ee9c VPN l\u00e2u \u0111\u1eddi nh\u1ea5t v\u00e0 ph\u1ed5 bi\u1ebfn nh\u1ea5t. OpenVPN hi\u1ec7n \u0111\u1ea1i h\u01a1n m\u1ed9t ch\u00fat v\u00e0 c\u00f3 th\u1ec3 an to\u00e0n h\u01a1n n\u1ebfu \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh \u0111\u00fang.<\/p>\n<p>OpenVPN s\u1eed d\u1ee5ng SSL\/TLS \u0111\u1ec3 m\u00e3 h\u00f3a, c\u00f4ng ngh\u1ec7 t\u01b0\u01a1ng t\u1ef1 m\u00e0 tr\u00ecnh duy\u1ec7t web c\u1ee7a b\u1ea1n s\u1eed d\u1ee5ng \u0111\u1ec3 k\u1ebft n\u1ed1i \u0111\u1ebfn c\u00e1c trang web an to\u00e0n. OpenVPN linh ho\u1ea1t h\u01a1n v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh cho c\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng kh\u00e1c nhau, trong khi PPTP r\u1ea5t d\u1ec5 thi\u1ebft l\u1eadp nh\u01b0ng k\u00e9m linh ho\u1ea1t h\u01a1n.<\/p>\n<p>M\u1eb7c d\u00f9 OpenVPN an to\u00e0n h\u01a1n PPTP, nh\u01b0ng vi\u1ec7c thi\u1ebft l\u1eadp c\u00f3 th\u1ec3 kh\u00f3 kh\u0103n h\u01a1n. N\u1ebfu b\u1ea1n kh\u00f4ng tho\u1ea3i m\u00e1i khi c\u1ea5u h\u00ecnh VPN, b\u1ea1n c\u00f3 th\u1ec3 mu\u1ed1n s\u1eed d\u1ee5ng PPTP.<\/p>\n<h2 id=\"how-to-use-openvpn\"><strong>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 s\u1eed d\u1ee5ng OpenVPN?<\/strong><\/h2>\n<h3 id=\"for-windows-platforms\"><strong>D\u00e0nh cho n\u1ec1n t\u1ea3ng Windows<\/strong><\/h3>\n<p>\u0110\u1ea7u ti\u00ean, b\u1ea1n c\u1ea7n t\u1ea3i xu\u1ed1ng \u1ee9ng d\u1ee5ng kh\u00e1ch OpenVPN. Ng\u01b0\u1eddi d\u00f9ng Windows v\u00e0 Mac c\u00f3 th\u1ec3 t\u00ecm th\u1ea5y phi\u00ean b\u1ea3n m\u1edbi nh\u1ea5t, V3,\u00a0<a href=\"https:\/\/openvpn.net\/client-connect-vpn-for-windows\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u0111\u00e2y<\/a>.<\/p>\n<p>Sau khi b\u1ea1n \u0111\u00e3 c\u00e0i \u0111\u1eb7t m\u00e1y kh\u00e1ch OpenVPN, h\u00e3y kh\u1edfi ch\u1ea1y n\u00f3 v\u00e0 nh\u1eadp t\u1ec7p .ovpn t\u1eeb<\/p>\n<p>Sau khi c\u00e0i \u0111\u1eb7t m\u00e1y kh\u00e1ch OpenVPN, b\u1ea1n ph\u1ea3i t\u1ea3i xu\u1ed1ng t\u1ec7p c\u1ea5u h\u00ecnh. T\u1ec7p n\u00e0y cho m\u00e1y kh\u00e1ch OpenVPN bi\u1ebft c\u00e1ch k\u1ebft n\u1ed1i v\u1edbi m\u00e1y ch\u1ee7 VPN. B\u1ea1n c\u00f3 th\u1ec3 l\u1ea5y t\u1ec7p n\u00e0y t\u1eeb nh\u00e0 cung c\u1ea5p VPN c\u1ee7a m\u00ecnh.<\/p>\n<p>Sau khi b\u1ea1n \u0111\u00e3 t\u1ea3i xu\u1ed1ng t\u1ec7p c\u1ea5u h\u00ecnh, h\u00e3y m\u1edf t\u1ec7p \u0111\u00f3 b\u1eb1ng m\u00e1y kh\u00e1ch OpenVPN. M\u00e1y kh\u00e1ch OpenVPN s\u1ebd y\u00eau c\u1ea7u b\u1ea1n nh\u1eadp t\u00ean ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u1eadt kh\u1ea9u. Sau khi b\u1ea1n nh\u1eadp nh\u1eefng th\u00f4ng tin n\u00e0y, m\u00e1y kh\u00e1ch OpenVPN s\u1ebd k\u1ebft n\u1ed1i v\u1edbi m\u00e1y ch\u1ee7 VPN.<\/p>\n<p>OpenVPN hi\u1ec7n \u0111ang ch\u1ea1y \u1edf ch\u1ebf \u0111\u1ed9 n\u1ec1n. B\u1ea1n c\u00f3 th\u1ec3 x\u00e1c minh \u0111i\u1ec1u n\u00e0y b\u1eb1ng c\u00e1ch ki\u1ec3m tra \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u00ecnh. \u0110\u1ec3 th\u1ef1c hi\u1ec7n vi\u1ec7c n\u00e0y, h\u00e3y truy c\u1eadp\u00a0<a href=\"https:\/\/www.whatismyip.com\/ip-address-lookup\/\" target=\"_blank\" rel=\"noreferrer noopener\">whatismyip.com<\/a>. B\u1ea1n s\u1ebd th\u1ea5y \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u00ecnh \u0111\u00e3 thay \u0111\u1ed5i.<\/p>\n<h3 id=\"for-macos-platforms\"><strong>D\u00e0nh cho n\u1ec1n t\u1ea3ng macOS<\/strong><\/h3>\n<p>N\u1ebfu b\u1ea1n \u0111ang s\u1eed d\u1ee5ng m\u00e1y Mac, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u00e1y kh\u00e1ch OpenVPN cho macOS. C\u00f3 th\u1ec3 t\u1ea3i xu\u1ed1ng phi\u00ean b\u1ea3n m\u1edbi nh\u1ea5t\u00a0<a href=\"https:\/\/openvpn.net\/client-connect-vpn-for-mac-os\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u0111\u00e2y<\/a>.<\/p>\n<p>Sau khi c\u00e0i \u0111\u1eb7t m\u00e1y kh\u00e1ch OpenVPN, b\u1ea1n ph\u1ea3i t\u1ea3i xu\u1ed1ng t\u1ec7p c\u1ea5u h\u00ecnh. T\u1ec7p n\u00e0y cho m\u00e1y kh\u00e1ch OpenVPN bi\u1ebft c\u00e1ch k\u1ebft n\u1ed1i v\u1edbi m\u00e1y ch\u1ee7 VPN. B\u1ea1n c\u00f3 th\u1ec3 l\u1ea5y t\u1ec7p n\u00e0y t\u1eeb nh\u00e0 cung c\u1ea5p VPN c\u1ee7a m\u00ecnh.<\/p>\n<p>Sau khi t\u1ea3i xu\u1ed1ng t\u1ec7p c\u1ea5u h\u00ecnh, h\u00e3y m\u1edf t\u1ec7p \u0111\u00f3 b\u1eb1ng m\u00e1y kh\u00e1ch OpenVPN. M\u00e1y kh\u00e1ch OpenVPN s\u1ebd y\u00eau c\u1ea7u b\u1ea1n nh\u1eadp t\u00ean ng\u01b0\u1eddi d\u00f9ng v\u00e0 m\u1eadt kh\u1ea9u. Sau khi b\u1ea1n nh\u1eadp nh\u1eefng th\u00f4ng tin n\u00e0y, m\u00e1y kh\u00e1ch OpenVPN s\u1ebd k\u1ebft n\u1ed1i v\u1edbi m\u00e1y ch\u1ee7 VPN.<\/p>\n<p>OpenVPN hi\u1ec7n \u0111ang ch\u1ea1y \u1edf ch\u1ebf \u0111\u1ed9 n\u1ec1n. B\u1ea1n c\u00f3 th\u1ec3 x\u00e1c minh \u0111i\u1ec1u n\u00e0y b\u1eb1ng c\u00e1ch ki\u1ec3m tra \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u00ecnh. \u0110\u1ec3 th\u1ef1c hi\u1ec7n vi\u1ec7c n\u00e0y, h\u00e3y truy c\u1eadp whatismyip.com. B\u1ea1n s\u1ebd th\u1ea5y \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u00ecnh \u0111\u00e3 thay \u0111\u1ed5i.<\/p>\n<h3 id=\"for-linux-platforms\"><strong>D\u00e0nh cho n\u1ec1n t\u1ea3ng Linux<\/strong><\/h3>\n<p>N\u1ebfu b\u1ea1n \u0111ang s\u1eed d\u1ee5ng Linux, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u00e1y kh\u00e1ch OpenVPN cho Linux. Phi\u00ean b\u1ea3n m\u1edbi nh\u1ea5t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u1ea3i xu\u1ed1ng\u00a0<a href=\"https:\/\/openvpn.net\/cloud-docs\/openvpn-3-client-for-linux\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u0111\u00e2y<\/a>.<\/p>\n<h4 id=\"installation-for-debian-and-ubuntu\"><strong>C\u00e0i \u0111\u1eb7t cho Debian v\u00e0 Ubuntu<\/strong><\/h4>\n<p>N\u1ebfu b\u1ea1n \u0111ang s\u1eed d\u1ee5ng Debian ho\u1eb7c Ubuntu, b\u1ea1n c\u00f3 th\u1ec3 c\u00e0i \u0111\u1eb7t OpenVPN b\u1eb1ng l\u1ec7nh sau:<\/p>\n<ol>\n<li>M\u1edf Terminal b\u1eb1ng c\u00e1ch nh\u1ea5n <strong>\u0110i\u1ec1u khi\u1ec3n<\/strong> + <strong>thay th\u1ebf<\/strong> + <strong>T<\/strong><\/li>\n<li>\u00a0Nh\u1eadp l\u1ec7nh sau v\u00e0o Terminal:\u00a0<code>sudo apt c\u00e0i \u0111\u1eb7t apt-transport-https<\/code>. Sau \u0111\u00f3 nh\u1eadp m\u1eadt kh\u1ea9u g\u1ed1c.<\/li>\n<li>Nh\u1eadp l\u1ec7nh sau: <code>sudo wget https:\/\/swupdate.openvpn.net\/repos\/openvpn-repo-pkg-key.pub<\/code>. Thao t\u00e1c n\u00e0y s\u1ebd t\u1ea3i xu\u1ed1ng kh\u00f3a kho l\u01b0u tr\u1eef OpenVPN \u0111\u01b0\u1ee3c c\u00e1c g\u00f3i OpenVPN 3 Linux s\u1eed d\u1ee5ng.<\/li>\n<li>Nh\u1eadp l\u1ec7nh sau v\u00e0o Terminal:\u00a0<code>sudo apt-key th\u00eam openvpn-repo-pkg-key.pub<\/code><\/li>\n<li>Nh\u1eadp l\u1ec7nh sau v\u00e0o Terminal: <code>sudo wget -O \/etc\/apt\/sources.list.d\/openvpn3.list https:\/\/swupdate.openvpn.net\/community\/openvpn3\/repos\/openvpn3-$DISTRO.list<\/code>. T\u00f9y thu\u1ed9c v\u00e0o b\u1ea3n ph\u00e2n ph\u1ed1i Debian\/Ubuntu c\u1ee7a b\u1ea1n, b\u1ea1n c\u1ea7n thay th\u1ebf\u00a0<em>$DISTRO<\/em>\u00a0v\u1edbi t\u00ean ph\u00e1t h\u00e0nh ch\u00ednh x\u00e1c t\u1eeb b\u1ea3ng b\u00ean d\u01b0\u1edbi.<\/li>\n<li>Nh\u1eadp l\u1ec7nh sau v\u00e0o Terminal:\u00a0<code>sudo apt c\u1eadp nh\u1eadt<\/code><\/li>\n<li>Nh\u1eadp l\u1ec7nh sau v\u00e0o Terminal:\u00a0<code>sudo apt c\u00e0i \u0111\u1eb7t openvpn3<\/code>. M\u00e3 n\u00e0y s\u1ebd c\u00e0i \u0111\u1eb7t g\u00f3i OpenVPN 3.<\/li>\n<\/ol>\n<h4 id=\"installation-using-ovpn-profile\"><strong>C\u00e0i \u0111\u1eb7t s\u1eed d\u1ee5ng .ovpn Profile<\/strong><\/h4>\n<p>N\u1ebfu b\u1ea1n c\u00f3 c\u1ea5u h\u00ecnh OpenVPN (t\u1ec7p .ovpn) t\u1eeb nh\u00e0 cung c\u1ea5p VPN, b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u1ea5u h\u00ecnh n\u00e0y \u0111\u1ec3 k\u1ebft n\u1ed1i v\u1edbi m\u00e1y ch\u1ee7 VPN.<\/p>\n<ol>\n<li>\u0110\u1ec3 t\u1ea1o c\u1ea5u h\u00ecnh m\u1ed9t l\u1ea7n, h\u00e3y nh\u1eadp l\u1ec7nh sau v\u00e0o Terminal:\u00a0<code>openvpn3 session-start --config ${T\u1ec6P_C\u1ea4U_H\u00ccNH_C\u00c1C_C\u00c1C_TH\u1ee8C_C\u00c1C_C\u00c1C_H\u00ccNH ...\u00a0<\/code><\/li>\n<li>Nh\u1eadp l\u1ec7nh sau v\u00e0o Terminal \u0111\u1ec3 nh\u1eadp t\u1ec7p c\u1ea5u h\u00ecnh v\u00e0 b\u1eaft \u0111\u1ea7u phi\u00ean VPN:\u00a0<code>openvpn3 config-import --config ${T\u1ec6P_C\u1ea4U_H\u00ccNH_C\u1ee6A_MY}<\/code>.<\/li>\n<li>\u0110\u1ec3 thi\u1ebft l\u1eadp k\u1ebft n\u1ed1i VPN m\u1edbi t\u1eeb h\u1ed3 s\u01a1 \u0111\u00e3 nh\u1eadp, h\u00e3y s\u1eed d\u1ee5ng l\u1ec7nh sau:\u00a0<code>openvpn3 phi\u00ean-kh\u1edfi-\u0111\u1ea7u --config ${CONFIGURATION_PROFILE_NAME}<\/code>.<\/li>\n<\/ol>\n<h3 id=\"installation-for-red-hat-enterprise-linux-or-scientific-linux\"><strong>C\u00e0i \u0111\u1eb7t cho Red Hat Enterprise Linux ho\u1eb7c Scientific Linux<\/strong><\/h3>\n<p>N\u1ebfu b\u1ea1n \u0111ang s\u1eed d\u1ee5ng Red Hat Enterprise Linux ho\u1eb7c Scientific Linux 7, b\u1ea1n c\u00f3 th\u1ec3 c\u00e0i \u0111\u1eb7t OpenVPN b\u1eb1ng l\u1ec7nh sau:<\/p>\n<ol>\n<li>V\u00e0o thanh t\u00ecm ki\u1ebfm v\u00e0 nh\u1eadp \u201c<strong>ph\u1ea7n cu\u1ed1i.<\/strong>\u201c<br \/>\nRHEL\/CentOS 6: <code>sudo yum c\u00e0i \u0111\u1eb7t https:\/\/dl.fedoraproject.org\/pub\/epel\/epel-release-latest-6.noarch.rpm<\/code>&nbsp;<\/p>\n<p>RHEL\/CentOS 7:\u00a0<code>sudo yum c\u00e0i \u0111\u1eb7t https:\/\/dl.fedoraproject.org\/pub\/epel\/epel-release-latest-7.noarch.rpm<\/code><br \/>\nTr\u00ean RHEL 7, b\u1ea1n c\u0169ng n\u00ean b\u1eadt c\u00e1c kho l\u01b0u tr\u1eef t\u00f9y ch\u1ecdn, b\u1ed5 sung v\u00e0 HA v\u00ec c\u00e1c g\u00f3i EPEL c\u00f3 th\u1ec3 ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c g\u00f3i t\u1eeb c\u00e1c kho l\u01b0u tr\u1eef n\u00e0y:\u00a0<code>sudo subscription-manager repos --enable &quot;rhel-*-optional-rpms&quot; --enable &quot;rhel-*-extras-rpms&quot; --enable &quot;rhel-ha-for-rhel-*-server-rpms&quot;<\/code><\/p>\n<p>&nbsp;<\/p>\n<p>RHEL\/CentOS 8:\u00a0<code>sudo yum c\u00e0i \u0111\u1eb7t https:\/\/dl.fedoraproject.org\/pub\/epel\/epel-release-latest-8.noarch.rpm<\/code>K\u00edch ho\u1ea1t c\u00e1c d\u1ecbch v\u1ee5 c\u1ea7n thi\u1ebft tr\u00ean Red Hat 8.\u00a0<code>kho l\u01b0u tr\u1eef codeready-builder-for-rhel-8-${ARCH}-rpms v\u00ec c\u00e1c g\u00f3i EPEL c\u00f3 th\u1ec3 ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c g\u00f3i t\u1eeb kho l\u01b0u tr\u1eef n\u00e0y: sudo ARCH=$( \/bin\/arch ) theo sau l\u00e0 sudo subscription-manager repos --enable &quot;codeready-builder-for-rhel-8-${ARCH}-rpms&quot;<\/code><\/p>\n<p>&nbsp;<\/p>\n<p>Ngo\u00e0i ra, ng\u01b0\u1eddi d\u00f9ng CentOS 8 n\u00ean b\u1eadt kho l\u01b0u tr\u1eef PowerTools v\u00ec m\u1ed9t s\u1ed1 g\u00f3i EPEL c\u00f3 th\u1ec3 ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c g\u00f3i b\u1ed5 sung t\u1eeb kho l\u01b0u tr\u1eef n\u00e0y:<code>sudo dnf config-manager --set-enabled PowerTools<\/code><\/li>\n<li>Tr\u01b0\u1edbc ti\u00ean h\u00e3y c\u00e0i \u0111\u1eb7t m\u00f4-\u0111un yum copr. \u0110\u1ec3 th\u1ef1c hi\u1ec7n vi\u1ec7c n\u00e0y, h\u00e3y ch\u1ea1y l\u1ec7nh sau: <code>sudo yum c\u00e0i \u0111\u1eb7t yum-plugin-copr<\/code>.<\/li>\n<li>B\u1eadt kho l\u01b0u tr\u1eef OpenVPN 3 Copr v\u1edbi m\u00f4-\u0111un Copr \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t. \u0110\u1ec3 th\u1ef1c hi\u1ec7n, h\u00e3y s\u1eed d\u1ee5ng l\u1ec7nh sau: <code>sudo yum copr k\u00edch ho\u1ea1t dsommers\/openvpn3<\/code><\/li>\n<li>Sau khi c\u00e0i \u0111\u1eb7t, m\u00e1y kh\u00e1ch OpenVPN 3 Linux c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c kh\u1edfi ch\u1ea1y b\u1eb1ng l\u1ec7nh sau:\u00a0<code>sudo yum c\u00e0i \u0111\u1eb7t openvpn3-client<\/code><\/li>\n<\/ol>\n<p>OpenVPN l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd v\u00e0 linh ho\u1ea1t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 b\u1ea3o m\u1eadt to\u00e0n b\u1ed9 k\u1ebft n\u1ed1i internet c\u1ee7a b\u1ea1n. \u0110i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i hi\u1ec3u nh\u1eefng \u0111i\u1ec1u c\u01a1 b\u1ea3n v\u1ec1 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a VPN tr\u01b0\u1edbc khi b\u1ea1n b\u1eaft \u0111\u1ea7u s\u1eed d\u1ee5ng, nh\u01b0ng m\u1ed9t khi b\u1ea1n \u0111\u00e3 hi\u1ec3u, OpenVPN c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t c\u00e1ch tuy\u1ec7t v\u1eddi \u0111\u1ec3 gi\u1eef an to\u00e0n cho d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n.<\/p>","protected":false},"excerpt":{"rendered":"<p>Internet c\u0169ng quan tr\u1ecdng nh\u01b0 b\u1ea5t k\u1ef3 d\u1ecbch v\u1ee5 c\u00f4ng c\u1ed9ng n\u00e0o kh\u00e1c tr\u00ean th\u1ebf gi\u1edbi ng\u00e0y nay. \u0110i\u1ec1u \u0111\u1ea7u ti\u00ean m\u1ecdi ng\u01b0\u1eddi ngh\u0129 \u0111\u1ebfn khi mua nh\u00e0 m\u1edbi ho\u1eb7c m\u1edf c\u00f4ng ty\u2026 <a class=\"more-link\" href=\"https:\/\/securitybriefing.net\/vi\/mang-rieng-ao\/gioi-thieu-ve-openvpn\/\">Ti\u1ebfp t\u1ee5c \u0111\u1ecdc <span class=\"screen-reader-text\">Gi\u1edbi thi\u1ec7u v\u1ec1 OpenVPN<\/span><\/a><\/p>","protected":false},"author":3,"featured_media":1000,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[],"class_list":["post-713","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vpn","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Introduction to OpenVPN | Security Briefing<\/title>\n<meta name=\"description\" content=\"Want to learn more about how OpenVPN works? 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