{"id":15823,"date":"2026-07-09T13:35:09","date_gmt":"2026-07-09T06:35:09","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=15823"},"modified":"2026-07-09T13:35:47","modified_gmt":"2026-07-09T06:35:47","slug":"ip-public-la-gi","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/ip-public-la-gi\/","title":{"rendered":"IP Public L\u00e0 G\u00ec? Hi\u1ec3u \u0110\u00fang, Ph\u00e2n Bi\u1ec7t IP Private v\u00e0 C\u00e1ch Check IP Public"},"content":{"rendered":"\n\n<style>\n.interdata-plan-carousel,.interdata-plan-carousel *{box-sizing:border-box}\n.interdata-plan-carousel{--blue:#005bea;--blue-dark:#004dcc;--text:#071832;--muted:#516173;--border:#d8e6fb;--bg:#f3f8ff;--shadow:0 5px 14px rgba(0,62,145,.08);container-type:inline-size;background:var(--bg);padding:14px 40px 18px;position:relative;overflow:hidden}\n.interdata-carousel-heading{color:#f00;font-family:Roboto,sans-serif;font-size:18px;line-height:1.35;font-weight:800;text-align:center;margin:0 0 14px}\n.interdata-plan-viewport{overflow:hidden;width:100%}\n.interdata-plan-track{display:flex;gap:12px;overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;-webkit-overflow-scrolling:touch;scrollbar-width:none;padding:0 0 4px}\n.interdata-plan-track::-webkit-scrollbar{display:none}\n.interdata-plan-card{flex:0 0 calc((100% - 36px)\/4);min-width:0;background:#fff;border:1px solid var(--border);border-radius:8px;padding:15px 10px 13px;min-height:370px;display:flex;flex-direction:column;scroll-snap-align:start;box-shadow:var(--shadow)}\n.interdata-plan-title{color:var(--blue-dark);font-size:16px;line-height:1.22;font-weight:800;text-align:center;margin:0 0 7px;text-transform:uppercase;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}\n.interdata-plan-price{color:var(--blue-dark);font-size:24px;line-height:1;font-weight:900;text-align:center;margin-bottom:12px;white-space:nowrap;letter-spacing:0}\n.interdata-plan-price span{font-size:10px;font-weight:800;margin-left:2px}\n.interdata-plan-badge{align-self:center;display:inline-flex;align-items:center;justify-content:center;background:#ff3934;color:#fff;border-radius:5px;padding:7px 8px;font-size:9px;line-height:1;font-weight:800;margin-bottom:15px;white-space:nowrap;max-width:100%}\n.interdata-plan-features{list-style:none!important;padding:0!important;margin:0!important}\n.interdata-plan-features li{display:flex;gap:7px;align-items:flex-start;color:var(--text);font-size:12px;line-height:1.35;font-weight:700;text-align:left;margin:0 0 10px!important;padding:0!important}\n.interdata-plan-icon{width:14px;min-width:14px;height:14px;color:#0069ff;margin-top:2px}\n.interdata-plan-icon svg{display:block;width:100%;height:100%;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}\n.interdata-plan-spacer{flex:1;min-height:16px}\n.interdata-plan-button{display:flex;align-items:center;justify-content:center;min-height:42px;width:100%;background:var(--blue);color:#fff!important;border-radius:5px;font-size:13px;font-weight:800;text-decoration:none!important;box-shadow:0 7px 14px rgba(0,91,234,.24);transition:transform .2s ease,background .2s ease}\n.interdata-plan-button:hover{background:var(--blue-dark);color:#fff!important;transform:translateY(-1px)}\n.interdata-carousel-arrow{position:absolute;top:50%;z-index:5;width:44px;height:54px;border:2px solid #fff!important;border-radius:999px;background:var(--blue)!important;color:#fff!important;box-shadow:0 8px 22px rgba(0,62,145,.32);display:flex!important;align-items:center;justify-content:center;cursor:pointer;transform:translateY(-35%);transition:background .2s ease,color .2s ease,opacity .2s ease,transform .2s ease}\n.interdata-carousel-arrow:hover{background:var(--blue-dark)!important;color:#fff!important;transform:translateY(-35%) scale(1.04)}\n.interdata-carousel-arrow:disabled{opacity:.78;cursor:not-allowed;background:#8aa6cf!important;color:#fff!important}\n.interdata-carousel-arrow:disabled:hover{background:#8aa6cf!important;color:#fff!important;transform:translateY(-35%)}\n.interdata-carousel-arrow svg{display:none!important}\n.interdata-carousel-arrow:before{content:none!important;display:none!important}\n.interdata-carousel-mark{display:block!important;color:#fff!important;font-family:Arial,Helvetica,sans-serif!important;font-size:38px!important;font-weight:900!important;line-height:1!important;text-align:center!important;pointer-events:none!important;transform:translateY(-2px)}\n.interdata-carousel-prev{left:14px}\n.interdata-carousel-prev .interdata-carousel-mark{margin-left:-2px}\n.interdata-carousel-next{right:14px}\n.interdata-carousel-next .interdata-carousel-mark{margin-right:-2px}\n@container (max-width:640px){.interdata-plan-carousel{padding:12px 38px 16px}.interdata-plan-card{flex-basis:calc((100% - 12px)\/2);min-height:370px}.interdata-carousel-heading{font-size:16px}}\n@container (max-width:480px){.interdata-plan-carousel{padding:12px 34px 16px}.interdata-plan-card{flex-basis:100%;min-height:360px}.interdata-plan-price{font-size:25px}.interdata-carousel-arrow{width:34px;height:44px}.interdata-carousel-mark{font-size:32px!important}.interdata-carousel-prev{left:5px}.interdata-carousel-next{right:5px}}\n<\/style>\n\n<div class=\"interdata-plan-carousel\" data-interdata-carousel>\n  <div class=\"interdata-carousel-heading\">Si\u00eau \u01afu \u0110\u00e3i VPS \/ CLOUD SERVER - Ti\u1ebft Ki\u1ec7m \u0110\u1ebfn 70%<\/div>\n\n  <svg width=\"0\" height=\"0\" style=\"position:absolute;visibility:hidden\" aria-hidden=\"true\">\n    <symbol id=\"id-icon-cpu\" viewBox=\"0 0 24 24\"><rect x=\"7\" y=\"7\" width=\"10\" height=\"10\" rx=\"2\"><\/rect><path d=\"M4 9h3M4 15h3M17 9h3M17 15h3M9 4v3M15 4v3M9 17v3M15 17v3\"><\/path><path d=\"M10 10h4v4h-4z\"><\/path><\/symbol>\n    <symbol id=\"id-icon-ram\" viewBox=\"0 0 24 24\"><rect x=\"4\" y=\"8\" width=\"16\" height=\"8\" rx=\"2\"><\/rect><path d=\"M7 16v2M11 16v2M15 16v2M19 16v2M7 11h1M11 11h1M15 11h1\"><\/path><\/symbol>\n    <symbol id=\"id-icon-storage\" viewBox=\"0 0 24 24\"><rect x=\"6\" y=\"3\" width=\"12\" height=\"18\" rx=\"2\"><\/rect><path d=\"M9 7h6\"><\/path><circle cx=\"12\" cy=\"16\" r=\"1.5\"><\/circle><\/symbol>\n    <symbol id=\"id-icon-network\" viewBox=\"0 0 24 24\"><path d=\"M5 12.5a10 10 0 0 1 14 0\"><\/path><path d=\"M8.5 16a5 5 0 0 1 7 0\"><\/path><path d=\"M12 19h.01\"><\/path><\/symbol>\n    <symbol id=\"id-icon-gift\" viewBox=\"0 0 24 24\"><rect x=\"3\" y=\"8\" width=\"18\" height=\"13\" rx=\"2\"><\/rect><path d=\"M12 8v13M3 12h18\"><\/path><path d=\"M7.5 8C6.1 8 5 6.9 5 5.5S6.1 3 7.5 3C10 3 12 8 12 8\"><\/path><path d=\"M16.5 8C17.9 8 19 6.9 19 5.5S17.9 3 16.5 3C14 3 12 8 12 8\"><\/path><\/symbol>\n  <\/svg>\n\n  <button class=\"interdata-carousel-arrow interdata-carousel-prev\" type=\"button\" aria-label=\"Xem 4 g\u00f3i tr\u01b0\u1edbc\">\n    <svg viewBox=\"0 0 24 24\" aria-hidden=\"true\"><path d=\"M15 18l-6-6 6-6\"><\/path><\/svg>\n    <span class=\"interdata-carousel-mark\" aria-hidden=\"true\">&#8249;<\/span>\n  <\/button>\n\n  <div class=\"interdata-plan-viewport\">\n    <div class=\"interdata-plan-track\">\n      <article class=\"interdata-plan-card\">\n        <h3 class=\"interdata-plan-title\">Premium Base<\/h3>\n        <div class=\"interdata-plan-price\">299K<span>\/3 th\u00e1ng<\/span><\/div>\n        <div class=\"interdata-plan-badge\">GIA H\u1ea0N KH\u00d4NG \u0110\u1ed4I GI\u00c1<\/div>\n        <ul class=\"interdata-plan-features\">\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-cpu\"><\/use><\/svg><\/span>2 vCore Intel<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-ram\"><\/use><\/svg><\/span>2GB RAM<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-storage\"><\/use><\/svg><\/span>30GB SSD NVMe<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-network\"><\/use><\/svg><\/span>Network: 300Mbps<\/li>\n        <\/ul>\n        <div class=\"interdata-plan-spacer\"><\/div>\n        <a class=\"interdata-plan-button\" href=\"https:\/\/support.interdata.vn\/index.php?rp=\/store\/best-value-plans-2026\/best-value-plans-premium-base\" target=\"_blank\" rel=\"nofollow sponsored noopener\">\u0110\u0103ng k\u00fd ngay<\/a>\n      <\/article>\n\n      <article class=\"interdata-plan-card\">\n        <h3 class=\"interdata-plan-title\">Premium Base<\/h3>\n        <div class=\"interdata-plan-price\">999K<span>\/n\u0103m<\/span><\/div>\n        <div class=\"interdata-plan-badge\">GIA H\u1ea0N KH\u00d4NG \u0110\u1ed4I GI\u00c1<\/div>\n        <ul class=\"interdata-plan-features\">\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-cpu\"><\/use><\/svg><\/span>3 vCore Intel<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-ram\"><\/use><\/svg><\/span>3GB RAM<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-storage\"><\/use><\/svg><\/span>30GB SSD NVMe<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-network\"><\/use><\/svg><\/span>Network: 300Mbps<\/li>\n        <\/ul>\n        <div class=\"interdata-plan-spacer\"><\/div>\n        <a class=\"interdata-plan-button\" href=\"https:\/\/support.interdata.vn\/index.php?rp=\/store\/cyber-week-2026\/premium-base\" target=\"_blank\" rel=\"nofollow sponsored noopener\">\u0110\u0103ng k\u00fd ngay<\/a>\n      <\/article>\n\n      <article class=\"interdata-plan-card\">\n        <h3 class=\"interdata-plan-title\">Premium Pro<\/h3>\n        <div class=\"interdata-plan-price\">2.599K<span>\/n\u0103m<\/span><\/div>\n        <div class=\"interdata-plan-badge\">GIA H\u1ea0N KH\u00d4NG \u0110\u1ed4I GI\u00c1<\/div>\n        <ul class=\"interdata-plan-features\">\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-cpu\"><\/use><\/svg><\/span>6 vCore Intel<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-ram\"><\/use><\/svg><\/span>8GB RAM<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-storage\"><\/use><\/svg><\/span>80GB SSD NVMe<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-network\"><\/use><\/svg><\/span>Network: 350Mbps<\/li>\n        <\/ul>\n        <div class=\"interdata-plan-spacer\"><\/div>\n        <a class=\"interdata-plan-button\" href=\"https:\/\/support.interdata.vn\/index.php?rp=\/store\/cyber-week-2026\/premium-pro\" target=\"_blank\" rel=\"nofollow sponsored noopener\">\u0110\u0103ng k\u00fd ngay<\/a>\n      <\/article>\n\n      <article class=\"interdata-plan-card\">\n        <h3 class=\"interdata-plan-title\">Premium Ultra<\/h3>\n        <div class=\"interdata-plan-price\">5.679K<span>\/n\u0103m<\/span><\/div>\n        <div class=\"interdata-plan-badge\">GIA H\u1ea0N KH\u00d4NG \u0110\u1ed4I GI\u00c1<\/div>\n        <ul class=\"interdata-plan-features\">\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-cpu\"><\/use><\/svg><\/span>12 vCore Intel<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-ram\"><\/use><\/svg><\/span>16GB RAM<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-storage\"><\/use><\/svg><\/span>180GB SSD NVMe<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-network\"><\/use><\/svg><\/span>Network: 450Mbps<\/li>\n        <\/ul>\n        <div class=\"interdata-plan-spacer\"><\/div>\n        <a class=\"interdata-plan-button\" href=\"https:\/\/support.interdata.vn\/index.php?rp=\/store\/cyber-week-2026\/premium-ultra\" target=\"_blank\" rel=\"nofollow sponsored noopener\">\u0110\u0103ng k\u00fd ngay<\/a>\n      <\/article>\n\n      <article class=\"interdata-plan-card\">\n        <h3 class=\"interdata-plan-title\">BD-CLOUD 1<\/h3>\n        <div class=\"interdata-plan-price\">988K<span>\/n\u0103m<\/span><\/div>\n        <div class=\"interdata-plan-badge\">GIA H\u1ea0N KH\u00d4NG \u0110\u1ed4I GI\u00c1<\/div>\n        <ul class=\"interdata-plan-features\">\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-cpu\"><\/use><\/svg><\/span>3 vCPU<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-ram\"><\/use><\/svg><\/span>3 GB RAM<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-storage\"><\/use><\/svg><\/span>30 GB SSD NVMe<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-network\"><\/use><\/svg><\/span>Network: 300 Mbps<\/li>\n        <\/ul>\n        <div class=\"interdata-plan-spacer\"><\/div>\n        <a class=\"interdata-plan-button\" href=\"https:\/\/support.interdata.vn\/cart.php?a=add&pid=521&billingcycle=annually\" target=\"_blank\" rel=\"nofollow sponsored noopener\">\u0110\u0103ng k\u00fd ngay<\/a>\n      <\/article>\n\n      <article class=\"interdata-plan-card\">\n        <h3 class=\"interdata-plan-title\">BD-CLOUD 2<\/h3>\n        <div class=\"interdata-plan-price\">2.988K<span>\/n\u0103m<\/span><\/div>\n        <div class=\"interdata-plan-badge\">GIA H\u1ea0N KH\u00d4NG \u0110\u1ed4I GI\u00c1<\/div>\n        <ul class=\"interdata-plan-features\">\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-cpu\"><\/use><\/svg><\/span>4 vCPU<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-ram\"><\/use><\/svg><\/span>8 GB RAM<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-storage\"><\/use><\/svg><\/span>80 GB SSD NVMe<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-network\"><\/use><\/svg><\/span>Network: 300 Mbps<\/li>\n        <\/ul>\n        <div class=\"interdata-plan-spacer\"><\/div>\n        <a class=\"interdata-plan-button\" href=\"https:\/\/support.interdata.vn\/cart.php?a=add&pid=522&billingcycle=annually\" target=\"_blank\" rel=\"nofollow sponsored noopener\">\u0110\u0103ng k\u00fd ngay<\/a>\n      <\/article>\n\n      <article class=\"interdata-plan-card\">\n        <h3 class=\"interdata-plan-title\">Cloud-Day - Base<\/h3>\n        <div class=\"interdata-plan-price\">2.666K<span>\/n\u0103m<\/span><\/div>\n        <div class=\"interdata-plan-badge\">GIA H\u1ea0N KH\u00d4NG \u0110\u1ed4I GI\u00c1<\/div>\n        <ul class=\"interdata-plan-features\">\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-gift\"><\/use><\/svg><\/span>T\u1eb7ng 80GB S3 v\u00e0 1 n\u0103m s\u1eed d\u1ee5ng khi mua 2 n\u0103m tr\u1edf l\u00ean<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-cpu\"><\/use><\/svg><\/span>4 vCPU AMD G3<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-ram\"><\/use><\/svg><\/span>6GB RAM<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-storage\"><\/use><\/svg><\/span>60GB SSD NVMe<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-network\"><\/use><\/svg><\/span>Network: 10Gbps<\/li>\n        <\/ul>\n        <div class=\"interdata-plan-spacer\"><\/div>\n        <a class=\"interdata-plan-button\" href=\"https:\/\/support.interdata.vn\/index.php?rp=\/store\/cloud-day-by-interdata-2026\/cloud-day-base\" target=\"_blank\" rel=\"nofollow sponsored noopener\">\u0110\u0103ng k\u00fd ngay<\/a>\n      <\/article>\n\n      <article class=\"interdata-plan-card\">\n        <h3 class=\"interdata-plan-title\">Cloud-Day - Pro<\/h3>\n        <div class=\"interdata-plan-price\">5.666K<span>\/n\u0103m<\/span><\/div>\n        <div class=\"interdata-plan-badge\">GIA H\u1ea0N KH\u00d4NG \u0110\u1ed4I GI\u00c1<\/div>\n        <ul class=\"interdata-plan-features\">\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-gift\"><\/use><\/svg><\/span>T\u1eb7ng 200GB S3 v\u00e0 1 n\u0103m s\u1eed d\u1ee5ng khi mua 2 n\u0103m tr\u1edf l\u00ean<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-cpu\"><\/use><\/svg><\/span>8 vCPU AMD G3<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-ram\"><\/use><\/svg><\/span>12GB RAM<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-storage\"><\/use><\/svg><\/span>160GB SSD NVMe<\/li>\n          <li><span class=\"interdata-plan-icon\"><svg><use href=\"#id-icon-network\"><\/use><\/svg><\/span>Network: 10Gbps<\/li>\n        <\/ul>\n        <div class=\"interdata-plan-spacer\"><\/div>\n        <a class=\"interdata-plan-button\" href=\"https:\/\/support.interdata.vn\/index.php?rp=\/store\/cloud-day-by-interdata-2026\/cloud-day-pro\" target=\"_blank\" rel=\"nofollow sponsored noopener\">\u0110\u0103ng k\u00fd ngay<\/a>\n      <\/article>\n    <\/div>\n  <\/div>\n\n  <button class=\"interdata-carousel-arrow interdata-carousel-next\" type=\"button\" aria-label=\"Xem 4 g\u00f3i ti\u1ebfp theo\">\n    <svg viewBox=\"0 0 24 24\" aria-hidden=\"true\"><path d=\"M9 18l6-6-6-6\"><\/path><\/svg>\n    <span class=\"interdata-carousel-mark\" aria-hidden=\"true\">&#8250;<\/span>\n  <\/button>\n<\/div>\n\n<script>\n(function(){\n  function setupInterDataCarousel(root){\n    var track=root.querySelector('.interdata-plan-track');\n    var prev=root.querySelector('.interdata-carousel-prev');\n    var next=root.querySelector('.interdata-carousel-next');\n    if(!track||!prev||!next||track.dataset.ready==='1')return;\n    track.dataset.ready='1';\n\n    function pageWidth(){\n      return track.clientWidth;\n    }\n\n    function updateButtons(){\n      var maxScroll=track.scrollWidth-track.clientWidth-2;\n      prev.disabled=track.scrollLeft<=2;\n      next.disabled=track.scrollLeft>=maxScroll;\n    }\n\n    prev.addEventListener('click',function(){\n      track.scrollBy({left:-pageWidth(),behavior:'smooth'});\n    });\n\n    next.addEventListener('click',function(){\n      track.scrollBy({left:pageWidth(),behavior:'smooth'});\n    });\n\n    track.addEventListener('scroll',function(){\n      window.requestAnimationFrame(updateButtons);\n    });\n\n    window.addEventListener('resize',updateButtons);\n    updateButtons();\n  }\n\n  function initInterDataCarousels(){\n    document.querySelectorAll('[data-interdata-carousel]').forEach(setupInterDataCarousel);\n  }\n\n  if(document.readyState==='loading'){\n    document.addEventListener('DOMContentLoaded',initInterDataCarousels);\n  }else{\n    initInterDataCarousels();\n  }\n})();\n<\/script>\n\n\t<div id=\"gap-774160181\" class=\"gap-element clearfix\" style=\"display:block; height:auto;\">\n\t\t\n<style>\n#gap-774160181 {\n  padding-top: 30px;\n}\n<\/style>\n\t<\/div>\n\t\n<p style=\"text-align: justify;\"><span style=\"font-size: 100%;\"><strong>IP Public<\/strong> l\u00e0 \u0111\u1ecba ch\u1ec9 IP duy nh\u1ea5t gi\u00fap thi\u1ebft b\u1ecb ho\u1eb7c m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n giao ti\u1ebfp tr\u1ef1c ti\u1ebfp tr\u00ean Internet, kh\u00e1c h\u1eb3n d\u1ea3i IP Private ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng trong m\u1ea1ng n\u1ed9i b\u1ed9. Kh\u00f4ng ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c hai lo\u1ea1i IP n\u00e0y, b\u1ea1n s\u1ebd loay hoay khi m\u1edf port, c\u1ea5u h\u00ecnh VPN, g\u1eafn camera t\u1eeb xa ho\u1eb7c kh\u00f4ng hi\u1ec3u v\u00ec sao IP hi\u1ec3n th\u1ecb tr\u00ean m\u00e1y l\u1ea1i kh\u00e1c IP tra \u0111\u01b0\u1ee3c tr\u00ean m\u1ea1ng. B\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y gi\u1ea3i th\u00edch r\u00f5 IP Public l\u00e0 g\u00ec, c\u00e1ch ki\u1ec3m tra nhanh tr\u00ean t\u1eebng thi\u1ebft b\u1ecb v\u00e0 th\u1eddi \u0111i\u1ec3m n\u00ean c\u00f3 IP ri\u00eang qua gi\u1ea3i ph\u00e1p m\u00e1y ch\u1ee7 c\u1ee7a <a style=\"background: linear-gradient(90deg, #1E3A8A 0%, #2563EB 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; text-decoration: none; font-weight: bold;\" href=\"https:\/\/interdata.vn\/\">InterData<\/a>.<br \/>\n<\/span><\/p>\n<div style=\"background-color: #eff6ff; padding: 20px; border: 1.5px solid #BFDBFE; border-radius: 12px; margin-bottom: 40px; box-shadow: 0 8px 20px rgba(37, 99, 235, 0.05);\">\n<p style=\"font-family: 'Be Vietnam Pro', sans-serif; font-weight: bold; font-size: 18px; margin-top: 0; margin-bottom: 15px; color: #1e3a8a;\">N\u1ed8I DUNG B\u00c0I VI\u1ebeT<\/p>\n<ul style=\"list-style-type: none; padding-left: 0; margin: 0;\">\n<li style=\"margin-bottom: 10px;\"><a style=\"text-decoration: none; color: #2563eb; font-weight: bold;\" href=\"#section1\">1. IP Public l\u00e0 g\u00ec?<\/a><\/li>\n<li style=\"margin-bottom: 10px;\"><a style=\"text-decoration: none; color: #2563eb; font-weight: bold;\" href=\"#section2\">2. IP Public ho\u1ea1t \u0111\u1ed9ng th\u1ebf n\u00e0o? Li\u00ean h\u1ec7 v\u1edbi IPv4 v\u00e0 NAT<\/a><\/li>\n<li style=\"margin-bottom: 10px;\"><a style=\"text-decoration: none; color: #2563eb; font-weight: bold;\" href=\"#section3\">3. Ph\u00e2n bi\u1ec7t IP Public v\u00e0 IP Private<\/a><\/li>\n<li style=\"margin-bottom: 10px;\"><a style=\"text-decoration: none; color: #2563eb; font-weight: bold;\" href=\"#section4\">4. C\u00e1ch ki\u1ec3m tra IP Public tr\u00ean Windows, macOS, Linux v\u00e0 \u0111i\u1ec7n tho\u1ea1i<\/a><\/li>\n<li style=\"margin-bottom: 10px;\"><a style=\"text-decoration: none; color: #2563eb; font-weight: bold;\" href=\"#section5\">5. IP Public t\u0129nh v\u00e0 IP Public \u0111\u1ed9ng: khi n\u00e0o c\u1ea7n IP ri\u00eang?<\/a><\/li>\n<li style=\"margin-bottom: 10px;\"><a style=\"text-decoration: none; color: #2563eb; font-weight: bold;\" href=\"#section6\">6. R\u1ee7i ro b\u1ea3o m\u1eadt khi thi\u1ebft b\u1ecb d\u00f9ng IP Public tr\u1ef1c ti\u1ebfp<\/a><\/li>\n<li style=\"margin-bottom: 10px;\"><a style=\"text-decoration: none; color: #2563eb; font-weight: bold;\" href=\"#section7\">7. Khi n\u00e0o n\u00ean d\u00f9ng VPS ho\u1eb7c Cloud Server c\u00f3 IP Public ri\u00eang?<\/a><\/li>\n<li style=\"margin-bottom: 10px;\"><a style=\"text-decoration: none; color: #2563eb; font-weight: bold;\" href=\"#section8\">8. C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 IP Public<\/a><\/li>\n<\/ul>\n<\/div>\n<h2 id=\"section1\" style=\"color: #1e3a8a; font-size: 24px; font-weight: bold; text-align: left; border-left: 5px solid #2563EB; padding-left: 15px; margin-top: 40px; margin-bottom: 20px; line-height: 1.4;\">IP Public L\u00e0 G\u00ec?<\/h2>\n<p style=\"text-align: justify;\"><strong>IP Public<\/strong> (\u0111\u1ecba ch\u1ec9 IP c\u00f4ng c\u1ed9ng) l\u00e0 \u0111\u1ecba ch\u1ec9 IP duy nh\u1ea5t tr\u00ean to\u00e0n c\u1ea7u t\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m, do nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 Internet (ISP) ho\u1eb7c t\u1ed5 ch\u1ee9c qu\u1ea3n l\u00fd s\u1ed1 hi\u1ec7u Internet khu v\u1ef1c nh\u01b0 APNIC c\u1ea5p ph\u00e1t, d\u00f9ng \u0111\u1ec3 \u0111\u1ecbnh danh v\u00e0 k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp m\u1ed9t thi\u1ebft b\u1ecb ho\u1eb7c m\u00e1y ch\u1ee7 v\u1edbi c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c tr\u00ean Internet.<\/p>\n<p style=\"text-align: justify;\">V\u1ec1 b\u1ea3n ch\u1ea5t, IP Public l\u00e0 m\u1ed9t d\u1ea1ng c\u1ee5 th\u1ec3 c\u1ee7a <a href=\"https:\/\/interdata.vn\/blog\/dia-chi-ip-la-gi\/\">\u0111\u1ecba ch\u1ec9 IP<\/a> &#8211; d\u00e3y s\u1ed1 \u0111\u1ecbnh danh thi\u1ebft b\u1ecb trong m\u1ea1ng m\u00e1y t\u00ednh. \u0110i\u1ec3m kh\u00e1c bi\u1ec7t n\u1eb1m \u1edf ph\u1ea1m vi ho\u1ea1t \u0111\u1ed9ng: IP Public \u0111\u1ecbnh tuy\u1ebfn \u0111\u01b0\u1ee3c tr\u00ean to\u00e0n b\u1ed9 Internet, c\u00f2n IP Private ch\u1ec9 c\u00f3 \u00fd ngh\u0129a b\u00ean trong m\u1ed9t m\u1ea1ng n\u1ed9i b\u1ed9 (LAN) v\u00e0 kh\u00f4ng truy c\u1eadp \u0111\u01b0\u1ee3c t\u1eeb b\u00ean ngo\u00e0i n\u1ebfu kh\u00f4ng qua trung gian.<\/p>\n<p style=\"text-align: justify;\">Trong c\u00f4ng vi\u1ec7c qu\u1ea3n tr\u1ecb h\u1ec7 th\u1ed1ng, b\u1ea1n s\u1ebd g\u1eb7p IP Public \u1edf hai ng\u1eef c\u1ea3nh ch\u00ednh: IP WAN m\u00e0 nh\u00e0 m\u1ea1ng c\u1ea5p cho router gia \u0111\u00ecnh ho\u1eb7c v\u0103n ph\u00f2ng, v\u00e0 IP g\u00e1n tr\u1ef1c ti\u1ebfp cho m\u00e1y ch\u1ee7 (VPS, Cloud Server, Dedicated Server) \u0111\u1ec3 server c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy c\u1eadp t\u1eeb Internet m\u00e0 kh\u00f4ng c\u1ea7n NAT trung gian.<\/p>\n<ul style=\"list-style-type: disc; padding-left: 20px; margin-bottom: 25px; color: #1f2937;\">\n<li style=\"margin-bottom: 10px;\"><strong>T\u00ednh duy nh\u1ea5t:<\/strong> T\u1ea1i m\u1ed9t th\u1eddi \u0111i\u1ec3m, kh\u00f4ng c\u00f3 hai thi\u1ebft b\u1ecb n\u00e0o tr\u00ean Internet d\u00f9ng chung m\u1ed9t IP Public gi\u1ed1ng h\u1ec7t nhau.<\/li>\n<li style=\"margin-bottom: 10px;\"><strong>Ai c\u1ea5p ph\u00e1t:<\/strong> ISP c\u1ea5p IP Public cho thu\u00ea bao Internet; nh\u00e0 cung c\u1ea5p h\u1ea1 t\u1ea7ng m\u00e1y ch\u1ee7 c\u1ea5p IP Public cho VPS\/Cloud Server\/Dedicated Server.<\/li>\n<li style=\"margin-bottom: 10px;\"><strong>Chia s\u1ebb hay ri\u00eang:<\/strong> M\u1ed9t IP Public c\u1ee7a router c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c nhi\u1ec1u thi\u1ebft b\u1ecb trong nh\u00e0 d\u00f9ng chung qua NAT, trong khi m\u1ed9t VPS th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u00e1n m\u1ed9t IP Public ri\u00eang, kh\u00f4ng chia s\u1ebb v\u1edbi ai kh\u00e1c.<\/li>\n<li style=\"margin-bottom: 10px;\"><strong>\u1ee8ng d\u1ee5ng th\u1ef1c t\u1ebf:<\/strong> Truy c\u1eadp website, t\u1ea3i d\u1eef li\u1ec7u, h\u1ecdp video, remote SSH\/RDP, m\u1edf port cho game server ho\u1eb7c camera &#8211; t\u1ea5t c\u1ea3 \u0111\u1ec1u c\u1ea7n \u0111i qua m\u1ed9t IP Public \u1edf \u0111\u00e2u \u0111\u00f3 trong \u0111\u01b0\u1eddng truy\u1ec1n.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-42671\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/IP-Public-la-gi.jpg\" alt=\"IP Public l\u00e0 g\u00ec\" width=\"700\" height=\"467\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/IP-Public-la-gi.jpg 700w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/IP-Public-la-gi-300x200.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/p>\n<h2 id=\"section2\" style=\"color: #1e3a8a; font-size: 24px; font-weight: bold; text-align: left; border-left: 5px solid #2563EB; padding-left: 15px; margin-top: 40px; margin-bottom: 20px; line-height: 1.4;\">IP Public Ho\u1ea1t \u0110\u1ed9ng Th\u1ebf N\u00e0o? Li\u00ean H\u1ec7 V\u1edbi IPv4 V\u00e0 NAT<\/h2>\n<p style=\"text-align: justify;\">IP Public kh\u00f4ng t\u1ed3n t\u1ea1i \u0111\u1ed9c l\u1eadp. N\u00f3 g\u1eafn li\u1ec1n v\u1edbi hai kh\u00e1i ni\u1ec7m n\u1ec1n t\u1ea3ng c\u1ee7a m\u1ea1ng Internet: chu\u1ea9n \u0111\u1ecba ch\u1ec9 IPv4 v\u00e0 c\u01a1 ch\u1ebf NAT gi\u00fap h\u00e0ng t\u1ef7 thi\u1ebft b\u1ecb d\u00f9ng chung s\u1ed1 IP Public c\u00f3 h\u1ea1n.<\/p>\n<h3 style=\"color: #1e3a8a; font-size: 19px; font-weight: bold; margin-top: 28px; margin-bottom: 12px;\">IP Public ph\u1ed5 bi\u1ebfn hi\u1ec7n nay l\u00e0 \u0111\u1ecba ch\u1ec9 IPv4<\/h3>\n<p style=\"text-align: justify;\">Ph\u1ea7n l\u1edbn IP Public b\u1ea1n tra c\u1ee9u \u0111\u01b0\u1ee3c h\u00f4m nay l\u00e0 <a href=\"https:\/\/interdata.vn\/blog\/ipv4-la-gi\/\">IPv4<\/a>, chu\u1ea9n \u0111\u1ecba ch\u1ec9 32-bit c\u00f3 d\u1ea1ng b\u1ed1n nh\u00f3m s\u1ed1 c\u00e1ch nhau b\u1edfi d\u1ea5u ch\u1ea5m, v\u00ed d\u1ee5 118.69.x.x. IPv4 cung c\u1ea5p kho\u1ea3ng 4,3 t\u1ef7 \u0111\u1ecba ch\u1ec9, con s\u1ed1 t\u1eebng \u0111\u01b0\u1ee3c xem l\u00e0 kh\u1ed5ng l\u1ed3 nh\u01b0ng \u0111\u00e3 c\u1ea1n d\u1ea7n khi s\u1ed1 thi\u1ebft b\u1ecb k\u1ebft n\u1ed1i Internet t\u0103ng nhanh.<\/p>\n<p style=\"text-align: justify;\">\u0110\u00e2y l\u00e0 l\u00fd do chu\u1ea9n IPv6 ra \u0111\u1eddi song song, v\u1edbi kh\u00f4ng gian \u0111\u1ecba ch\u1ec9 l\u1edbn h\u01a1n nhi\u1ec1u l\u1ea7n. T\u1ea1i Vi\u1ec7t Nam, IPv6 \u0111ang \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 ISP v\u00e0 nh\u00e0 cung c\u1ea5p h\u1ea1 t\u1ea7ng tri\u1ec3n khai d\u1ea7n, nh\u01b0ng IPv4 Public v\u1eabn l\u00e0 lo\u1ea1i \u0111\u1ecba ch\u1ec9 \u0111\u01b0\u1ee3c d\u00f9ng ph\u1ed5 bi\u1ebfn nh\u1ea5t trong c\u00e1c c\u00e2u l\u1ec7nh, c\u00f4ng c\u1ee5 tra c\u1ee9u v\u00e0 c\u1ea5u h\u00ecnh firewall hi\u1ec7n t\u1ea1i.<\/p>\n<h3 style=\"color: #1e3a8a; font-size: 19px; font-weight: bold; margin-top: 28px; margin-bottom: 12px;\">V\u00ec sao thi\u1ebft b\u1ecb trong m\u1ea1ng n\u1ed9i b\u1ed9 ph\u1ea3i qua NAT m\u1edbi ra \u0111\u01b0\u1ee3c Internet<\/h3>\n<p style=\"text-align: justify;\">Router gia \u0111\u00ecnh ho\u1eb7c v\u0103n ph\u00f2ng th\u01b0\u1eddng ch\u1ec9 \u0111\u01b0\u1ee3c ISP c\u1ea5p m\u1ed9t IP Public duy nh\u1ea5t, trong khi b\u00ean trong c\u00f3 h\u00e0ng ch\u1ee5c thi\u1ebft b\u1ecb: \u0111i\u1ec7n tho\u1ea1i, laptop, camera, TV th\u00f4ng minh. M\u1ed7i thi\u1ebft b\u1ecb n\u00e0y nh\u1eadn m\u1ed9t IP Private n\u1ed9i b\u1ed9, kh\u00f4ng th\u1ec3 t\u1ef1 k\u1ebft n\u1ed1i ra Internet n\u1ebfu \u0111\u1ee9ng ri\u00eang l\u1ebb.<\/p>\n<p style=\"text-align: justify;\">Router gi\u1ea3i quy\u1ebft b\u00e0i to\u00e1n n\u00e0y b\u1eb1ng <a href=\"https:\/\/interdata.vn\/blog\/nat-la-gi\/\">c\u01a1 ch\u1ebf NAT<\/a> (Network Address Translation): khi m\u1ed9t thi\u1ebft b\u1ecb trong m\u1ea1ng g\u1eedi request ra ngo\u00e0i, router &#8220;d\u1ecbch&#8221; IP Private c\u1ee7a thi\u1ebft b\u1ecb \u0111\u00f3 th\u00e0nh IP Public c\u1ee7a router, g\u1eedi \u0111i, r\u1ed3i khi c\u00f3 ph\u1ea3n h\u1ed3i tr\u1ea3 v\u1ec1 l\u1ea1i d\u1ecbch ng\u01b0\u1ee3c \u0111\u1ec3 chuy\u1ec3n \u0111\u00fang cho thi\u1ebft b\u1ecb \u0111\u00e3 g\u1eedi. \u0110\u00e2y c\u0169ng ch\u00ednh l\u00e0 l\u00fd do b\u1ea1n kh\u00f4ng th\u1ec3 remote th\u1eb3ng v\u00e0o m\u1ed9t m\u00e1y t\u00ednh trong m\u1ea1ng nh\u00e0 n\u1ebfu kh\u00f4ng c\u1ea5u h\u00ecnh m\u1edf port ho\u1eb7c port forwarding tr\u00ean router.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-42674\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/So-do-nguyen-ly-hoat-dong-cua-IP-Public.jpg\" alt=\"S\u01a1 \u0111\u1ed3 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a IP Public\" width=\"700\" height=\"467\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/So-do-nguyen-ly-hoat-dong-cua-IP-Public.jpg 700w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/So-do-nguyen-ly-hoat-dong-cua-IP-Public-300x200.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/p>\n<h2 id=\"section3\" style=\"color: #1e3a8a; font-size: 24px; font-weight: bold; text-align: left; border-left: 5px solid #2563EB; padding-left: 15px; margin-top: 40px; margin-bottom: 20px; line-height: 1.4;\">Ph\u00e2n Bi\u1ec7t IP Public V\u00e0 IP Private<\/h2>\n<p style=\"text-align: justify;\">IP Public v\u00e0 <a href=\"https:\/\/interdata.vn\/blog\/ip-private-la-gi\/\">IP Private<\/a> l\u00e0 hai kh\u00e1i ni\u1ec7m hay b\u1ecb nh\u1ea7m l\u1eabn nh\u1ea5t khi m\u1edbi l\u00e0m quen v\u1edbi m\u1ea1ng m\u00e1y t\u00ednh. B\u1ea3ng d\u01b0\u1edbi \u0111\u00e2y t\u00f3m t\u1eaft kh\u00e1c bi\u1ec7t c\u1ed1t l\u00f5i \u0111\u1ec3 b\u1ea1n tra nhanh khi c\u1ea5u h\u00ecnh h\u1ec7 th\u1ed1ng.<\/p>\n<div style=\"overflow-x: auto; margin: 25px 0;\">\n<table style=\"width: 100%; border-collapse: collapse; font-size: 15px;\">\n<thead>\n<tr style=\"background: linear-gradient(90deg, #1E3A8A 0%, #2563EB 100%);\">\n<th style=\"color: #ffffff; padding: 12px 15px; text-align: left; border: 1px solid #BFDBFE;\">Ti\u00eau ch\u00ed<\/th>\n<th style=\"color: #ffffff; padding: 12px 15px; text-align: left; border: 1px solid #BFDBFE;\">IP Public<\/th>\n<th style=\"color: #ffffff; padding: 12px 15px; text-align: left; border: 1px solid #BFDBFE;\">IP Private<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background-color: #f9fafb;\">\n<td style=\"padding: 12px 15px; border: 1px solid #E5E7EB;\">Ph\u1ea1m vi ho\u1ea1t \u0111\u1ed9ng<\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #E5E7EB;\">\u0110\u1ecbnh tuy\u1ebfn \u0111\u01b0\u1ee3c tr\u00ean to\u00e0n Internet<\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #E5E7EB;\">Ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng trong m\u1ea1ng LAN n\u1ed9i b\u1ed9<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px 15px; border: 1px solid #E5E7EB;\">D\u1ea3i \u0111\u1ecba ch\u1ec9 tham chi\u1ebfu<\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #E5E7EB;\">C\u00e1c d\u1ea3i c\u00f2n l\u1ea1i ngo\u00e0i d\u1ea3i Private (theo IANA)<\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #E5E7EB;\">10.0.0.0\/8, 172.16.0.0\/12, 192.168.0.0\/16 (RFC 1918)<\/td>\n<\/tr>\n<tr style=\"background-color: #f9fafb;\">\n<td style=\"padding: 12px 15px; border: 1px solid #E5E7EB;\">Truy c\u1eadp tr\u1ef1c ti\u1ebfp t\u1eeb Internet<\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #E5E7EB;\">C\u00f3, n\u1ebfu kh\u00f4ng b\u1ecb firewall ch\u1eb7n<\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #E5E7EB;\">Kh\u00f4ng, ph\u1ea3i qua NAT ho\u1eb7c VPN<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px 15px; border: 1px solid #E5E7EB;\">Ai c\u1ea5p ph\u00e1t<\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #E5E7EB;\">ISP ho\u1eb7c nh\u00e0 cung c\u1ea5p h\u1ea1 t\u1ea7ng m\u00e1y ch\u1ee7<\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #E5E7EB;\">Router ho\u1eb7c qu\u1ea3n tr\u1ecb vi\u00ean m\u1ea1ng n\u1ed9i b\u1ed9 t\u1ef1 \u0111\u1eb7t<\/td>\n<\/tr>\n<tr style=\"background-color: #f9fafb;\">\n<td style=\"padding: 12px 15px; border: 1px solid #E5E7EB;\">C\u00f3 th\u1ec3 tr\u00f9ng gi\u1eefa c\u00e1c m\u1ea1ng kh\u00e1c nhau<\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #E5E7EB;\">Kh\u00f4ng, ph\u1ea3i duy nh\u1ea5t to\u00e0n c\u1ea7u<\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #E5E7EB;\">C\u00f3, v\u00ed d\u1ee5 nhi\u1ec1u nh\u00e0 c\u00f9ng d\u00f9ng 192.168.1.1<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 12px 15px; border: 1px solid #E5E7EB;\">\u1ee8ng d\u1ee5ng ph\u1ed5 bi\u1ebfn<\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #E5E7EB;\">Ch\u1ea1y website, m\u1edf port, remote server, VPN endpoint<\/td>\n<td style=\"padding: 12px 15px; border: 1px solid #E5E7EB;\">K\u1ebft n\u1ed1i n\u1ed9i b\u1ed9 gi\u1eefa m\u00e1y t\u00ednh, m\u00e1y in, camera trong LAN<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p style=\"text-align: justify; font-size: 13px; color: #6b7280;\">D\u1ea3i \u0111\u1ecba ch\u1ec9 IP Private tham chi\u1ebfu theo t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt RFC 1918 do IETF c\u00f4ng b\u1ed1.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-42673\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Phan-Biet-IP-Public-Va-IP-Private.jpg\" alt=\"Ph\u00e2n Bi\u1ec7t IP Public V\u00e0 IP Private\" width=\"700\" height=\"467\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Phan-Biet-IP-Public-Va-IP-Private.jpg 700w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Phan-Biet-IP-Public-Va-IP-Private-300x200.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/p>\n<div style=\"display: flex; flex-wrap: wrap; background-color: #fff; border: 1.5px solid #BFDBFE; box-shadow: 0 8px 20px rgba(37,99,235,0.08); border-radius: 12px; overflow: hidden; margin: 35px 0;\">\n<div style=\"flex: 1; min-width: 250px; background: linear-gradient(135deg, #1E3A8A 0%, #2563EB 100%); display: flex; align-items: center; justify-content: center; padding: 30px; text-align: center;\">\n<div>\n<p style=\"color: white; font-size: 30px; font-family: 'Be Vietnam Pro', sans-serif; font-weight: bold; margin: 0; line-height: 1.2;\">Thu\u00ea VPS InterData<\/p>\n<p style=\"color: #dbeafe; font-size: 15px; font-weight: 600; margin-top: 12px;\">IP Public ri\u00eang, to\u00e0n quy\u1ec1n root, CPU th\u1ebf h\u1ec7 m\u1edbi, SSD NVMe U.2<\/p>\n<\/div>\n<\/div>\n<div style=\"flex: 2; padding: 25px; min-width: 300px;\">\n<h3 style=\"font-family: 'Be Vietnam Pro', sans-serif; color: #1e3a8a; margin-top: 0; font-size: 20px;\">C\u1ea7n m\u1ed9t IP Public ri\u00eang \u0111\u1ec3 t\u1ef1 c\u1ea5u h\u00ecnh m\u1ecdi th\u1ee9?<\/h3>\n<p style=\"text-align: justify; font-size: 15px; margin-bottom: 15px;\">N\u1ebfu b\u1ea1n \u0111ang b\u1ecb gi\u1edbi h\u1ea1n b\u1edfi IP Public d\u00f9ng chung sau NAT c\u1ee7a nh\u00e0 m\u1ea1ng v\u00e0 c\u1ea7n m\u1edf port, ch\u1ea1y VPN, remote SSH\/RDP hay host website nh\u1ecf \u0111\u1ebfn v\u1eeba, VPS t\u1ea1i InterData \u0111\u01b0\u1ee3c g\u00e1n IP Public ri\u00eang ngay t\u1eeb \u0111\u1ea7u, kh\u00f4ng ph\u1ea3i xin c\u1ea5p l\u1ea1i m\u1ed7i l\u1ea7n \u0111\u1ed5i m\u1ea1ng.<\/p>\n<p><a style=\"background: linear-gradient(90deg, #2563EB 0%, #1E3A8A 100%); color: white; padding: 12px 25px; text-decoration: none; font-weight: 600; border-radius: 8px; font-size: 15px; display: inline-block; box-shadow: 0 5px 15px rgba(37,99,235,0.3);\" href=\"https:\/\/interdata.vn\/thue-vps\/\" target=\"_blank\" rel=\"noopener\">Xem b\u1ea3ng gi\u00e1 Thu\u00ea VPS \u27f6<\/a><\/p>\n<\/div>\n<\/div>\n<h2 id=\"section4\" style=\"color: #1e3a8a; font-size: 24px; font-weight: bold; text-align: left; border-left: 5px solid #2563EB; padding-left: 15px; margin-top: 40px; margin-bottom: 20px; line-height: 1.4;\">C\u00e1ch Ki\u1ec3m Tra IP Public Tr\u00ean Windows, macOS, Linux V\u00e0 \u0110i\u1ec7n Tho\u1ea1i<\/h2>\n<p style=\"text-align: justify;\">C\u00e1ch nhanh nh\u1ea5t \u0111\u1ec3 check IP Public l\u00e0 d\u00f9ng c\u00f4ng c\u1ee5 tra c\u1ee9u tr\u00ean tr\u00ecnh duy\u1ec7t, v\u00ec IP Public hi\u1ec3n th\u1ecb trong C\u00e0i \u0111\u1eb7t m\u1ea1ng c\u1ee7a thi\u1ebft b\u1ecb th\u01b0\u1eddng ch\u1ec9 l\u00e0 IP Private n\u1ed9i b\u1ed9. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1ch ki\u1ec3m tra IP Public \u0111\u00fang theo t\u1eebng h\u1ec7 \u0111i\u1ec1u h\u00e0nh v\u00e0 thi\u1ebft b\u1ecb.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-42670\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Cach-Kiem-Tra-IP-Public-Tren-Windows-macOS-Linux-Va-Dien-Thoai.jpg\" alt=\"C\u00e1ch Ki\u1ec3m Tra IP Public Tr\u00ean Windows, macOS, Linux V\u00e0 \u0110i\u1ec7n Tho\u1ea1i\" width=\"700\" height=\"467\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Cach-Kiem-Tra-IP-Public-Tren-Windows-macOS-Linux-Va-Dien-Thoai.jpg 700w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2025\/09\/Cach-Kiem-Tra-IP-Public-Tren-Windows-macOS-Linux-Va-Dien-Thoai-300x200.jpg 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/p>\n<h3 style=\"color: #1e3a8a; font-size: 19px; font-weight: bold; margin-top: 28px; margin-bottom: 12px;\">C\u00e1ch 1: D\u00f9ng c\u00f4ng c\u1ee5 tra c\u1ee9u tr\u00ean web (nhanh nh\u1ea5t, kh\u00f4ng c\u1ea7n l\u1ec7nh)<\/h3>\n<p style=\"text-align: justify;\">M\u1edf tr\u00ecnh duy\u1ec7t tr\u00ean b\u1ea5t k\u1ef3 thi\u1ebft b\u1ecb n\u00e0o \u0111ang k\u1ebft n\u1ed1i Internet, truy c\u1eadp m\u1ed9t <a href=\"https:\/\/interdata.vn\/blog\/check-hosting-va-ip-website\/\">c\u00f4ng c\u1ee5 check IP website<\/a> ho\u1eb7c g\u00f5 &#8220;IP c\u1ee7a t\u00f4i l\u00e0 g\u00ec&#8221; tr\u00ean Google. K\u1ebft qu\u1ea3 tr\u1ea3 v\u1ec1 ch\u00ednh l\u00e0 IP Public m\u00e0 thi\u1ebft b\u1ecb ho\u1eb7c m\u1ea1ng c\u1ee7a b\u1ea1n \u0111ang d\u00f9ng \u0111\u1ec3 ra Internet t\u1ea1i th\u1eddi \u0111i\u1ec3m \u0111\u00f3.<\/p>\n<h3 style=\"color: #1e3a8a; font-size: 19px; font-weight: bold; margin-top: 28px; margin-bottom: 12px;\">C\u00e1ch ki\u1ec3m tra IP Public tr\u00ean Windows<\/h3>\n<p style=\"text-align: justify;\">L\u1ec7nh <code>ipconfig<\/code> tr\u00ean Windows ch\u1ec9 hi\u1ec3n th\u1ecb IP Private c\u1ee7a card m\u1ea1ng (d\u00f2ng IPv4 Address), kh\u00f4ng ph\u1ea3i IP Public, tr\u1eeb khi m\u00e1y \u0111\u01b0\u1ee3c g\u00e1n IP Public tr\u1ef1c ti\u1ebfp nh\u01b0 m\u1ed9t VPS Windows Server. \u0110\u1ec3 xem \u0111\u00fang IP Public, d\u00f9ng m\u1ed9t trong hai c\u00e1ch sau, \u00e1p d\u1ee5ng cho Windows 10\/11 c\u00f3 PowerShell ho\u1eb7c curl t\u00edch h\u1ee3p s\u1eb5n.<\/p>\n<ol style=\"padding-left: 20px; margin-bottom: 20px; color: #1f2937;\">\n<li style=\"margin-bottom: 10px;\">M\u1edf PowerShell, ch\u1ea1y l\u1ec7nh: <code>(Invoke-WebRequest -uri \"https:\/\/api.ipify.org\").Content<\/code><\/li>\n<li style=\"margin-bottom: 10px;\">Ho\u1eb7c m\u1edf Command Prompt (Windows 10\/11 \u0111\u00e3 t\u00edch h\u1ee3p curl), ch\u1ea1y l\u1ec7nh: <code>curl ifconfig.me<\/code><\/li>\n<li style=\"margin-bottom: 10px;\">K\u1ebft qu\u1ea3 tr\u1ea3 v\u1ec1 l\u00e0 IP Public \u0111ang d\u00f9ng \u0111\u1ec3 ra Internet.<\/li>\n<\/ol>\n<h3 style=\"color: #1e3a8a; font-size: 19px; font-weight: bold; margin-top: 28px; margin-bottom: 12px;\">C\u00e1ch ki\u1ec3m tra IP Public tr\u00ean macOS v\u00e0 Linux<\/h3>\n<p style=\"text-align: justify;\">T\u01b0\u01a1ng t\u1ef1 Windows, l\u1ec7nh <code>ifconfig<\/code> (macOS, Linux c\u0169) ho\u1eb7c <code>ip a<\/code> (Linux hi\u1ec7n \u0111\u1ea1i) ch\u1ec9 hi\u1ec3n th\u1ecb IP g\u00e1n tr\u1ef1c ti\u1ebfp cho t\u1eebng network interface. V\u1edbi m\u00e1y t\u00ednh c\u00e1 nh\u00e2n sau router, \u0111\u00f3 l\u00e0 IP Private. V\u1edbi VPS ho\u1eb7c Cloud Server c\u00f3 IP Public g\u00e1n th\u1eb3ng v\u00e0o interface, l\u1ec7nh n\u00e0y s\u1ebd hi\u1ec7n \u0111\u00fang IP Public.<\/p>\n<p style=\"text-align: justify;\">\u0110\u1ec3 ch\u1eafc ch\u1eafn l\u1ea5y \u0111\u00fang IP Public b\u1ea5t k\u1ec3 m\u00e1y \u0111ang \u1edf sau NAT hay kh\u00f4ng, ch\u1ea1y m\u1ed9t trong c\u00e1c l\u1ec7nh sau trong Terminal:<\/p>\n<ul style=\"list-style-type: disc; padding-left: 20px; margin-bottom: 20px; color: #1f2937;\">\n<li style=\"margin-bottom: 10px;\"><code>curl ifconfig.me<\/code><\/li>\n<li style=\"margin-bottom: 10px;\"><code>curl ipinfo.io\/ip<\/code><\/li>\n<li style=\"margin-bottom: 10px;\"><code>curl icanhazip.com<\/code><\/li>\n<\/ul>\n<h3 style=\"color: #1e3a8a; font-size: 19px; font-weight: bold; margin-top: 28px; margin-bottom: 12px;\">C\u00e1ch ki\u1ec3m tra IP Public tr\u00ean \u0111i\u1ec7n tho\u1ea1i (Android, iOS)<\/h3>\n<p style=\"text-align: justify;\">M\u1ee5c C\u00e0i \u0111\u1eb7t Wi-Fi tr\u00ean \u0111i\u1ec7n tho\u1ea1i ch\u1ec9 hi\u1ec3n th\u1ecb IP Private c\u1ee7a thi\u1ebft b\u1ecb trong m\u1ea1ng \u0111\u00f3. Mu\u1ed1n xem IP Public, m\u1edf tr\u00ecnh duy\u1ec7t Chrome ho\u1eb7c Safari tr\u00ean \u0111i\u1ec7n tho\u1ea1i v\u00e0 truy c\u1eadp c\u00f9ng c\u00f4ng c\u1ee5 tra c\u1ee9u IP nh\u01b0 tr\u00ean m\u00e1y t\u00ednh. L\u01b0u \u00fd n\u1ebfu \u0111i\u1ec7n tho\u1ea1i \u0111ang d\u00f9ng 4G\/5G, IP Public tr\u1ea3 v\u1ec1 l\u00e0 IP c\u1ee7a nh\u00e0 m\u1ea1ng di \u0111\u1ed9ng, th\u01b0\u1eddng kh\u00e1c ho\u00e0n to\u00e0n IP Public khi b\u1ea1n d\u00f9ng Wi-Fi nh\u00e0.<\/p>\n<h3 style=\"color: #1e3a8a; font-size: 19px; font-weight: bold; margin-top: 28px; margin-bottom: 12px;\">C\u00e1ch ki\u1ec3m tra IP Public tr\u00ean router<\/h3>\n<p style=\"text-align: justify;\">\u0110\u0103ng nh\u1eadp trang qu\u1ea3n tr\u1ecb router, th\u01b0\u1eddng \u1edf \u0111\u1ecba ch\u1ec9 192.168.1.1 ho\u1eb7c 192.168.0.1 (t\u00f9y h\u00e3ng router v\u00e0 c\u1ea5u h\u00ecnh c\u1ee7a ISP), v\u00e0o m\u1ee5c Status, WAN ho\u1eb7c Internet \u0111\u1ec3 xem IP WAN. \u0110\u00e2y ch\u00ednh l\u00e0 IP Public do ISP c\u1ea5p cho to\u00e0n b\u1ed9 m\u1ea1ng nh\u00e0 ho\u1eb7c v\u0103n ph\u00f2ng b\u1ea1n.<\/p>\n<p style=\"text-align: justify;\"><strong>Checklist x\u00e1c \u0111\u1ecbnh b\u1ea1n \u0111ang xem \u0111\u00fang IP Public:<\/strong><\/p>\n<ul style=\"list-style-type: disc; padding-left: 20px; margin-bottom: 25px; color: #1f2937;\">\n<li style=\"margin-bottom: 10px;\">K\u1ebft qu\u1ea3 tra c\u1ee9u kh\u1edbp nhau gi\u1eefa \u00edt nh\u1ea5t hai c\u00f4ng c\u1ee5 kh\u00e1c nhau.<\/li>\n<li style=\"margin-bottom: 10px;\">IP kh\u00f4ng n\u1eb1m trong d\u1ea3i Private theo RFC 1918 (kh\u00f4ng b\u1eaft \u0111\u1ea7u b\u1eb1ng 10., 172.16-31., ho\u1eb7c 192.168.).<\/li>\n<li style=\"margin-bottom: 10px;\">V\u1edbi VPS\/server, IP g\u00e1n tr\u1ef1c ti\u1ebfp trong <code>ip a<\/code>\/<code>ifconfig<\/code> kh\u1edbp v\u1edbi IP nh\u00e0 cung c\u1ea5p \u0111\u00e3 b\u00e0n giao.<\/li>\n<li style=\"margin-bottom: 10px;\">IP thay \u0111\u1ed5i sau khi kh\u1edfi \u0111\u1ed9ng l\u1ea1i router (d\u1ea5u hi\u1ec7u b\u1ea1n \u0111ang d\u00f9ng IP Public \u0111\u1ed9ng, kh\u00f4ng ph\u1ea3i IP t\u0129nh).<\/li>\n<\/ul>\n<h2 id=\"section5\" style=\"color: #1e3a8a; font-size: 24px; font-weight: bold; text-align: left; border-left: 5px solid #2563EB; padding-left: 15px; margin-top: 40px; margin-bottom: 20px; line-height: 1.4;\">IP Public T\u0129nh V\u00e0 IP Public \u0110\u1ed9ng: Khi N\u00e0o C\u1ea7n IP Ri\u00eang?<\/h2>\n<p style=\"text-align: justify;\">Kh\u00f4ng ph\u1ea3i IP Public n\u00e0o c\u0169ng c\u1ed1 \u0111\u1ecbnh. Ph\u1ea7n l\u1edbn thu\u00ea bao Internet gia \u0111\u00ecnh t\u1ea1i Vi\u1ec7t Nam \u0111\u01b0\u1ee3c c\u1ea5p IP Public \u0111\u1ed9ng (dynamic), t\u1ee9c ISP g\u00e1n IP ng\u1eabu nhi\u00ean t\u1eeb m\u1ed9t d\u1ea3i v\u00e0 c\u00f3 th\u1ec3 \u0111\u1ed5i m\u1ed7i khi router kh\u1edfi \u0111\u1ed9ng l\u1ea1i ho\u1eb7c sau m\u1ed9t chu k\u1ef3 nh\u1ea5t \u0111\u1ecbnh. IP Public t\u0129nh (static) th\u00ec c\u1ed1 \u0111\u1ecbnh, kh\u00f4ng \u0111\u1ed5i theo th\u1eddi gian, th\u01b0\u1eddng ph\u1ea3i \u0111\u0103ng k\u00fd ri\u00eang v\u1edbi ISP ho\u1eb7c d\u00f9ng qua d\u1ecbch v\u1ee5 m\u00e1y ch\u1ee7 \u0111\u01b0\u1ee3c <a href=\"https:\/\/interdata.vn\/blog\/dedicated-ip-la-gi\/\">Dedicated IP<\/a>, IP t\u0129nh ri\u00eang ngay t\u1eeb khi kh\u1edfi t\u1ea1o.<\/p>\n<p style=\"text-align: justify;\">V\u1edbi vi\u1ec7c <strong>c\u1ea5p ph\u00e1t \u0111\u1ecba ch\u1ec9 IP Public cho h\u1ec7 th\u1ed1ng<\/strong>, IP \u0111\u1ed9ng ph\u00f9 h\u1ee3p cho nhu c\u1ea7u duy\u1ec7t web, xem phim, l\u00e0m vi\u1ec7c th\u00f4ng th\u01b0\u1eddng. Nh\u01b0ng m\u1ed9t khi h\u1ec7 th\u1ed1ng c\u1ea7n \u0111\u01b0\u1ee3c truy c\u1eadp \u1ed5n \u0111\u1ecbnh t\u1eeb b\u00ean ngo\u00e0i, IP \u0111\u1ed5i li\u00ean t\u1ee5c s\u1ebd g\u00e2y gi\u00e1n \u0111o\u1ea1n: VPN client m\u1ea5t k\u1ebft n\u1ed1i, DNS tr\u1ecf sai, whitelist firewall kh\u00f4ng c\u00f2n \u0111\u00fang.<\/p>\n<p style=\"text-align: justify;\">C\u00e1c tr\u01b0\u1eddng h\u1ee3p th\u1ef1c t\u1ebf n\u00ean d\u00f9ng IP Public t\u0129nh ho\u1eb7c IP Public ri\u00eang qua <strong>VPS Public IP<\/strong>:<\/p>\n<ul style=\"list-style-type: disc; padding-left: 20px; margin-bottom: 25px; color: #1f2937;\">\n<li style=\"margin-bottom: 10px;\">T\u1ef1 host website, mail server ho\u1eb7c \u1ee9ng d\u1ee5ng n\u1ed9i b\u1ed9 c\u1ea7n domain tr\u1ecf th\u1eb3ng v\u00e0o IP.<\/li>\n<li style=\"margin-bottom: 10px;\">D\u1ef1ng VPN endpoint c\u1ed1 \u0111\u1ecbnh cho nh\u00e2n vi\u00ean remote truy c\u1eadp v\u00e0o m\u1ea1ng c\u00f4ng ty.<\/li>\n<li style=\"margin-bottom: 10px;\">Remote Desktop ho\u1eb7c SSH v\u00e0o m\u00e1y ch\u1ee7 t\u1eeb xa m\u00e0 kh\u00f4ng ph\u1ea3i c\u1eadp nh\u1eadt IP m\u1ed7i l\u1ea7n k\u1ebft n\u1ed1i.<\/li>\n<li style=\"margin-bottom: 10px;\">Gateway cho camera an ninh, NAS truy c\u1eadp t\u1eeb xa ngo\u00e0i m\u1ea1ng n\u1ed9i b\u1ed9.<\/li>\n<li style=\"margin-bottom: 10px;\">Game server ri\u00eang cho nh\u00f3m b\u1ea1n ho\u1eb7c c\u1ed9ng \u0111\u1ed3ng nh\u1ecf.<\/li>\n<li style=\"margin-bottom: 10px;\">H\u1ec7 th\u1ed1ng c\u1ea7n whitelist m\u1ed9t IP c\u1ed1 \u0111\u1ecbnh cho API, c\u1ed5ng thanh to\u00e1n ho\u1eb7c firewall doanh nghi\u1ec7p.<\/li>\n<\/ul>\n<h2 id=\"section6\" style=\"color: #1e3a8a; font-size: 24px; font-weight: bold; text-align: left; border-left: 5px solid #2563EB; padding-left: 15px; margin-top: 40px; margin-bottom: 20px; line-height: 1.4;\">R\u1ee7i Ro B\u1ea3o M\u1eadt Khi Thi\u1ebft B\u1ecb D\u00f9ng IP Public Tr\u1ef1c Ti\u1ebfp<\/h2>\n<p style=\"text-align: justify;\">C\u00f3 IP Public ri\u00eang \u0111i k\u00e8m tr\u00e1ch nhi\u1ec7m b\u1ea3o m\u1eadt l\u1edbn h\u01a1n d\u00f9ng IP d\u00f9ng chung sau NAT. Khi thi\u1ebft b\u1ecb ho\u1eb7c server ph\u01a1i tr\u1ef1c ti\u1ebfp m\u1ed9t IP Public ra Internet, m\u1ecdi c\u1ed5ng m\u1edf \u0111\u1ec1u c\u00f3 th\u1ec3 b\u1ecb bot d\u00f2 qu\u00e9t 24 gi\u1edd m\u1ed7i ng\u00e0y, kh\u00f4ng ph\u00e2n bi\u1ec7t b\u1ea1n l\u00e0 c\u00e1 nh\u00e2n hay doanh nghi\u1ec7p.<\/p>\n<h3 style=\"color: #1e3a8a; font-size: 19px; font-weight: bold; margin-top: 28px; margin-bottom: 12px;\">Nh\u1eefng r\u1ee7i ro th\u01b0\u1eddng g\u1eb7p<\/h3>\n<ul style=\"list-style-type: disc; padding-left: 20px; margin-bottom: 20px; color: #1f2937;\">\n<li style=\"margin-bottom: 10px;\"><strong>Qu\u00e9t c\u1ed5ng (port scanning):<\/strong> Bot t\u1ef1 \u0111\u1ed9ng r\u00e0 to\u00e0n d\u1ea3i IP Public \u0111\u1ec3 t\u00ecm c\u1ed5ng \u0111ang m\u1edf, \u0111\u1eb7c bi\u1ec7t l\u00e0 22 (SSH), 3389 (RDP), 21 (FTP).<\/li>\n<li style=\"margin-bottom: 10px;\"><strong>Brute force:<\/strong> Khi ph\u00e1t hi\u1ec7n c\u1ed5ng qu\u1ea3n tr\u1ecb m\u1edf, bot d\u00f2 m\u1eadt kh\u1ea9u li\u00ean t\u1ee5c cho \u0111\u1ebfn khi \u0111\u0103ng nh\u1eadp \u0111\u01b0\u1ee3c.<\/li>\n<li style=\"margin-bottom: 10px;\"><strong>DDoS:<\/strong> T\u1ea5n c\u00f4ng t\u1eeb ch\u1ed1i d\u1ecbch v\u1ee5 nh\u1eafm th\u1eb3ng v\u00e0o IP Public, l\u00e0m ngh\u1ebdn b\u0103ng th\u00f4ng ho\u1eb7c treo d\u1ecbch v\u1ee5.<\/li>\n<li style=\"margin-bottom: 10px;\"><strong>L\u1ed9 d\u1ea5u v\u1ebft h\u1ec7 th\u1ed1ng (fingerprinting):<\/strong> K\u1ebb t\u1ea5n c\u00f4ng d\u1ef1a v\u00e0o c\u1ed5ng m\u1edf, banner d\u1ecbch v\u1ee5 \u0111\u1ec3 \u0111o\u00e1n h\u1ec7 \u0111i\u1ec1u h\u00e0nh, ph\u1ea7n m\u1ec1m \u0111ang ch\u1ea1y v\u00e0 t\u00ecm l\u1ed7 h\u1ed5ng t\u01b0\u01a1ng \u1ee9ng.<\/li>\n<\/ul>\n<h3 style=\"color: #1e3a8a; font-size: 19px; font-weight: bold; margin-top: 28px; margin-bottom: 12px;\">C\u00e1ch ph\u00f2ng ng\u1eeba khi d\u00f9ng IP Public ri\u00eang<\/h3>\n<ul style=\"list-style-type: disc; padding-left: 20px; margin-bottom: 25px; color: #1f2937;\">\n<li style=\"margin-bottom: 10px;\">\u0110\u1ed5i port m\u1eb7c \u0111\u1ecbnh c\u1ee7a SSH, RDP sang port kh\u00e1c thay v\u00ec \u0111\u1ec3 nguy\u00ean 22, 3389.<\/li>\n<li style=\"margin-bottom: 10px;\">B\u1eadt firewall \u1edf t\u1ea7ng h\u1ec7 \u0111i\u1ec1u h\u00e0nh v\u00e0 t\u1ea7ng h\u1ea1 t\u1ea7ng, ch\u1ec9 m\u1edf \u0111\u00fang port d\u1ecbch v\u1ee5 c\u1ea7n d\u00f9ng.<\/li>\n<li style=\"margin-bottom: 10px;\">D\u00f9ng x\u00e1c th\u1ef1c b\u1eb1ng SSH key thay v\u00ec m\u1eadt kh\u1ea9u cho truy c\u1eadp qu\u1ea3n tr\u1ecb.<\/li>\n<li style=\"margin-bottom: 10px;\">Gi\u1edbi h\u1ea1n IP ngu\u1ed3n \u0111\u01b0\u1ee3c ph\u00e9p truy c\u1eadp c\u1ed5ng qu\u1ea3n tr\u1ecb (whitelist) n\u1ebfu \u0111i\u1ec1u ki\u1ec7n c\u00f4ng vi\u1ec7c cho ph\u00e9p.<\/li>\n<li style=\"margin-bottom: 10px;\">Theo d\u00f5i log \u0111\u0103ng nh\u1eadp, log truy c\u1eadp \u0111\u1ec3 ph\u00e1t hi\u1ec7n s\u1edbm ho\u1ea1t \u0111\u1ed9ng b\u1ea5t th\u01b0\u1eddng.<\/li>\n<li style=\"margin-bottom: 10px;\">C\u00e2n nh\u1eafc d\u1ecbch v\u1ee5 ch\u1ed1ng DDoS \u1edf t\u1ea7ng network cho c\u00e1c h\u1ec7 th\u1ed1ng c\u00f4ng khai quan tr\u1ecdng.<\/li>\n<\/ul>\n<h2 id=\"section7\" style=\"color: #1e3a8a; font-size: 24px; font-weight: bold; text-align: left; border-left: 5px solid #2563EB; padding-left: 15px; margin-top: 40px; margin-bottom: 20px; line-height: 1.4;\">Khi N\u00e0o N\u00ean D\u00f9ng VPS Ho\u1eb7c Cloud Server C\u00f3 IP Public Ri\u00eang?<\/h2>\n<p style=\"text-align: justify;\">Khi nhu c\u1ea7u v\u01b0\u1ee3t qu\u00e1 m\u1ed9t IP Public d\u00f9ng chung sau NAT c\u1ee7a nh\u00e0 m\u1ea1ng, b\u01b0\u1edbc ti\u1ebfp theo l\u00e0 chuy\u1ec3n sang h\u1ea1 t\u1ea7ng m\u00e1y ch\u1ee7 \u0111\u01b0\u1ee3c c\u1ea5p IP Public ri\u00eang ngay t\u1eeb \u0111\u1ea7u. L\u1ef1a ch\u1ecdn gi\u1eefa VPS v\u00e0 Cloud Server ph\u1ee5 thu\u1ed9c v\u00e0o quy m\u00f4 v\u00e0 m\u1ee9c \u0111\u1ed9 bi\u1ebfn \u0111\u1ed9ng c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n<p style=\"text-align: justify;\"><strong>VPS ph\u00f9 h\u1ee3p khi:<\/strong> b\u1ea1n c\u1ea7n m\u1ed9t IP Public ri\u00eang \u0111\u1ec3 m\u1edf port, remote SSH\/RDP, ch\u1ea1y website nh\u1ecf \u0111\u1ebfn v\u1eeba, VPN c\u00e1 nh\u00e2n, bot t\u1ef1 \u0111\u1ed9ng, c\u00f4ng c\u1ee5 automation nh\u01b0 n8n, ho\u1eb7c l\u00e0m gateway cho camera, NAS. T\u00e0i nguy\u00ean c\u1ed1 \u0111\u1ecbnh, chi ph\u00ed d\u1ec5 ti\u1ebfp c\u1eadn, ph\u00f9 h\u1ee3p h\u1ec7 th\u1ed1ng c\u00f3 t\u1ea3i \u1ed5n \u0111\u1ecbnh.<\/p>\n<p style=\"text-align: justify;\"><strong>Cloud Server l\u00e0 b\u01b0\u1edbc n\u00e2ng c\u1ea5p khi:<\/strong> traffic bi\u1ebfn \u0111\u1ed9ng theo m\u00f9a cao \u0111i\u1ec3m, c\u1ea7n scale t\u00e0i nguy\u00ean nhanh, v\u1eadn h\u00e0nh nhi\u1ec1u IP cho c\u00e1c d\u1ecbch v\u1ee5 t\u00e1ch bi\u1ec7t, database l\u1edbn, h\u1ec7 th\u1ed1ng ERP ho\u1eb7c \u1ee9ng d\u1ee5ng ph\u1ee5c v\u1ee5 nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng \u0111\u1ed3ng th\u1eddi.<\/p>\n<div style=\"display: flex; flex-wrap: wrap; background-color: #fff; border: 1.5px solid #BFDBFE; box-shadow: 0 8px 20px rgba(37,99,235,0.08); border-radius: 12px; overflow: hidden; margin: 35px 0;\">\n<div style=\"flex: 1; min-width: 250px; background: linear-gradient(135deg, #1E3A8A 0%, #2563EB 100%); display: flex; align-items: center; justify-content: center; padding: 30px; text-align: center;\">\n<div>\n<p style=\"color: white; font-size: 30px; font-family: 'Be Vietnam Pro', sans-serif; font-weight: bold; margin: 0; line-height: 1.2;\">Thu\u00ea Cloud Server InterData<\/p>\n<p style=\"color: #dbeafe; font-size: 15px; font-weight: 600; margin-top: 12px;\">Scale t\u00e0i nguy\u00ean theo t\u1ea3i, h\u1ed7 tr\u1ee3 nhi\u1ec1u IP Public, m\u1ea1ng t\u1ed1c \u0111\u1ed9 cao<\/p>\n<\/div>\n<\/div>\n<div style=\"flex: 2; padding: 25px; min-width: 300px;\">\n<h3 style=\"font-family: 'Be Vietnam Pro', sans-serif; color: #1e3a8a; margin-top: 0; font-size: 20px;\">H\u1ec7 th\u1ed1ng \u0111ang c\u1ea7n nhi\u1ec1u h\u01a1n m\u1ed9t IP Public ri\u00eang?<\/h3>\n<p style=\"text-align: justify; font-size: 15px; margin-bottom: 15px;\">Khi traffic t\u0103ng theo m\u00f9a cao \u0111i\u1ec3m ho\u1eb7c b\u1ea1n c\u1ea7n t\u00e1ch nhi\u1ec1u d\u1ecbch v\u1ee5 ra c\u00e1c IP Public kh\u00e1c nhau \u0111\u1ec3 d\u1ec5 qu\u1ea3n l\u00fd firewall, Cloud Server t\u1ea1i InterData cho ph\u00e9p m\u1edf r\u1ed9ng CPU, RAM theo nhu c\u1ea7u th\u1ef1c t\u1ebf m\u00e0 kh\u00f4ng ph\u1ea3i thay \u0111\u1ed5i to\u00e0n b\u1ed9 h\u1ea1 t\u1ea7ng.<\/p>\n<p><a style=\"background: linear-gradient(90deg, #2563EB 0%, #1E3A8A 100%); color: white; padding: 12px 25px; text-decoration: none; font-weight: 600; border-radius: 8px; font-size: 15px; display: inline-block; box-shadow: 0 5px 15px rgba(37,99,235,0.3);\" href=\"https:\/\/interdata.vn\/cloud-server\/\" target=\"_blank\" rel=\"noopener\">Xem b\u1ea3ng gi\u00e1 Cloud Server \u27f6<\/a><\/p>\n<\/div>\n<\/div>\n<h2 id=\"section8\" style=\"color: #1e3a8a; font-size: 24px; font-weight: bold; text-align: left; border-left: 5px solid #2563EB; padding-left: 15px; margin-top: 40px; margin-bottom: 20px; line-height: 1.4;\">C\u00e2u H\u1ecfi Th\u01b0\u1eddng G\u1eb7p V\u1ec1 IP Public<\/h2>\n<p style=\"text-align: justify;\"><strong>IP Public v\u00e0 IP Private c\u00e1i n\u00e0o an to\u00e0n h\u01a1n?<\/strong><\/p>\n<p style=\"text-align: justify;\">IP Private an to\u00e0n h\u01a1n v\u00ec kh\u00f4ng th\u1ec3 truy c\u1eadp tr\u1ef1c ti\u1ebfp t\u1eeb Internet, lu\u00f4n c\u1ea7n qua NAT ho\u1eb7c VPN. IP Public d\u1ec5 b\u1ecb qu\u00e9t c\u1ed5ng v\u00e0 t\u1ea5n c\u00f4ng h\u01a1n n\u1ebfu kh\u00f4ng c\u1ea5u h\u00ecnh firewall, gi\u1edbi h\u1ea1n truy c\u1eadp v\u00e0 theo d\u00f5i log th\u01b0\u1eddng xuy\u00ean.<\/p>\n<p style=\"text-align: justify;\"><strong>L\u00e0m sao c\u00f3 IP Public t\u0129nh?<\/strong><\/p>\n<p style=\"text-align: justify;\">V\u1edbi Internet gia \u0111\u00ecnh, b\u1ea1n c\u1ea7n \u0111\u0103ng k\u00fd g\u00f3i IP t\u0129nh ri\u00eang v\u1edbi ISP n\u1ebfu c\u00f3 h\u1ed7 tr\u1ee3. C\u00e1ch ph\u1ed5 bi\u1ebfn h\u01a1n v\u1edbi doanh nghi\u1ec7p v\u00e0 developer l\u00e0 thu\u00ea VPS ho\u1eb7c Cloud Server, v\u00ec c\u00e1c d\u1ecbch v\u1ee5 n\u00e0y th\u01b0\u1eddng g\u00e1n s\u1eb5n IP Public c\u1ed1 \u0111\u1ecbnh ngay khi kh\u1edfi t\u1ea1o.<\/p>\n<p style=\"text-align: justify;\"><strong>IP Public c\u00f3 \u0111\u1ed5i kh\u00f4ng?<\/strong><\/p>\n<p style=\"text-align: justify;\">C\u00f3, n\u1ebfu \u0111\u00f3 l\u00e0 IP Public \u0111\u1ed9ng &#8211; lo\u1ea1i ph\u1ed5 bi\u1ebfn v\u1edbi thu\u00ea bao gia \u0111\u00ecnh, s\u1ebd \u0111\u1ed5i khi router kh\u1edfi \u0111\u1ed9ng l\u1ea1i ho\u1eb7c theo chu k\u1ef3 c\u1ee7a ISP. IP Public t\u0129nh tr\u00ean VPS\/Cloud Server th\u01b0\u1eddng gi\u1eef nguy\u00ean trong su\u1ed1t th\u1eddi gian s\u1eed d\u1ee5ng d\u1ecbch v\u1ee5.<\/p>\n<p style=\"text-align: justify;\"><strong>T\u1ea1i sao IP tr\u00ean m\u00e1y kh\u00e1c IP khi tra tr\u00ean m\u1ea1ng?<\/strong><\/p>\n<p style=\"text-align: justify;\">V\u00ec l\u1ec7nh xem c\u1ea5u h\u00ecnh m\u1ea1ng tr\u00ean m\u00e1y (nh\u01b0 ipconfig, ifconfig, ip a) th\u01b0\u1eddng ch\u1ec9 hi\u1ec3n th\u1ecb IP Private n\u1ed9i b\u1ed9 \u0111\u01b0\u1ee3c router c\u1ea5p. IP b\u1ea1n tra \u0111\u01b0\u1ee3c qua c\u00f4ng c\u1ee5 web m\u1edbi l\u00e0 IP Public th\u1eadt, \u0111\u1ea1i di\u1ec7n cho c\u1ea3 m\u1ea1ng khi giao ti\u1ebfp ra Internet.<\/p>\n<p style=\"text-align: justify;\"><strong>IP Public mi\u1ec5n ph\u00ed \u0111\u01b0\u1ee3c kh\u00f4ng?<\/strong><\/p>\n<p style=\"text-align: justify;\">V\u1ec1 c\u01a1 b\u1ea3n c\u00f3, v\u00ec ISP th\u01b0\u1eddng \u0111\u00e3 bao g\u1ed3m m\u1ed9t IP Public \u0111\u1ed9ng trong g\u00f3i c\u01b0\u1edbc Internet. Tuy nhi\u00ean IP Public ri\u00eang, \u1ed5n \u0111\u1ecbnh v\u00e0 kh\u00f4ng \u0111\u1ed5i cho m\u1ee5c \u0111\u00edch ch\u1ea1y server, m\u1edf port th\u01b0\u1eddng \u0111i k\u00e8m d\u1ecbch v\u1ee5 tr\u1ea3 ph\u00ed nh\u01b0 VPS, Cloud Server ho\u1eb7c g\u00f3i IP t\u0129nh c\u1ee7a ISP.<\/p>\n<div style=\"border-top: 2px dashed #BFDBFE; margin-top: 50px; padding-top: 30px;\">\n<h3 style=\"font-family: 'Be Vietnam Pro', sans-serif; color: #1e3a8a; font-size: 22px; font-weight: bold; margin-bottom: 15px;\">Ch\u1ed1t l\u1ea1i: hi\u1ec3u \u0111\u00fang IP Public \u0111\u1ec3 ch\u1ee7 \u0111\u1ed9ng h\u01a1n khi v\u1eadn h\u00e0nh h\u1ec7 th\u1ed1ng<\/h3>\n<p style=\"text-align: justify;\">IP Public l\u00e0 m\u1eaft x\u00edch b\u1eaft bu\u1ed9c m\u1ed7i khi b\u1ea1n c\u1ea7n m\u1edf port, remote server, d\u1ef1ng VPN hay \u0111\u01b0a m\u1ed9t d\u1ecbch v\u1ee5 ra Internet. Ph\u00e2n bi\u1ec7t r\u00f5 IP Public v\u1edbi IP Private gi\u00fap b\u1ea1n c\u1ea5u h\u00ecnh \u0111\u00fang ngay t\u1eeb \u0111\u1ea7u, tr\u00e1nh m\u1ea5t th\u1eddi gian debug v\u00ec nh\u1ea7m gi\u1eefa hai lo\u1ea1i \u0111\u1ecba ch\u1ec9. Khi nhu c\u1ea7u v\u01b0\u1ee3t qu\u00e1 m\u1ed9t IP d\u00f9ng chung sau NAT c\u1ee7a nh\u00e0 m\u1ea1ng, IP Public ri\u00eang v\u00e0 \u1ed5n \u0111\u1ecbnh qua VPS ho\u1eb7c Cloud Server l\u00e0 b\u01b0\u1edbc \u0111i h\u1ee3p l\u00fd, \u0111i k\u00e8m tr\u00e1ch nhi\u1ec7m c\u1ea5u h\u00ecnh firewall v\u00e0 gi\u00e1m s\u00e1t b\u1ea3o m\u1eadt \u0111\u1ea7y \u0111\u1ee7.<\/p>\n<div style=\"background: #EFF6FF; border: 1px solid #2563EB; padding: 30px; margin-top: 25px; border-radius: 12px; text-align: center;\">\n<p style=\"font-family: 'Be Vietnam Pro', sans-serif; font-size: 20px; font-weight: bold; color: #1e3a8a; margin-top: 0;\">C\u1ea7n m\u1ed9t IP Public ri\u00eang \u0111\u1ec3 t\u1ef1 host, m\u1edf port v\u00e0 remote kh\u00f4ng gi\u1edbi h\u1ea1n?<\/p>\n<p style=\"font-size: 15px; margin-bottom: 20px; color: #4b5563;\">B\u1eaft \u0111\u1ea7u v\u1edbi VPS InterData, n\u00e2ng c\u1ea5p l\u00ean Cloud Server khi h\u1ec7 th\u1ed1ng c\u1ea7n scale v\u00e0 x\u1eed l\u00fd nhi\u1ec1u traffic h\u01a1n.<\/p>\n<p><a style=\"background: #2563EB; color: #ffffff; padding: 12px 30px; text-decoration: none; font-weight: 600; border-radius: 6px; display: inline-block;\" href=\"https:\/\/interdata.vn\/thue-vps\/\" target=\"_blank\" rel=\"noopener\">Thu\u00ea VPS ngay \u27f6<\/a><\/p>\n<\/div>\n<\/div>\n<p style=\"text-align: justify; font-size: 13px; font-style: italic; color: #6b7280; margin-top: 30px; border-top: 1px solid #E5E7EB; padding-top: 15px;\"><span style=\"font-size: 100%;\"><em>N\u1ed9i dung trong b\u00e0i mang t\u00ednh tham kh\u1ea3o k\u1ef9 thu\u1eadt. C\u00e1c l\u1ec7nh, \u0111\u01b0\u1eddng d\u1eabn c\u1ea5u h\u00ecnh router v\u00e0 giao di\u1ec7n qu\u1ea3n tr\u1ecb c\u00f3 th\u1ec3 kh\u00e1c nhau t\u00f9y h\u1ec7 \u0111i\u1ec1u h\u00e0nh, phi\u00ean b\u1ea3n ph\u1ea7n m\u1ec1m, h\u00e3ng thi\u1ebft b\u1ecb v\u00e0 nh\u00e0 m\u1ea1ng \u0111ang s\u1eed d\u1ee5ng. Tr\u01b0\u1edbc khi \u00e1p d\u1ee5ng b\u1ea5t k\u1ef3 thay \u0111\u1ed5i n\u00e0o li\u00ean quan \u0111\u1ebfn m\u1edf port, firewall hay c\u1ea5u h\u00ecnh IP Public cho h\u1ec7 th\u1ed1ng th\u1ef1c t\u1ebf, b\u1ea1n n\u00ean sao l\u01b0u d\u1eef li\u1ec7u, ki\u1ec3m th\u1eed tr\u00ean m\u00f4i tr\u01b0\u1eddng th\u1eed nghi\u1ec7m v\u00e0 \u0111\u00e1nh gi\u00e1 r\u1ee7i ro b\u1ea3o m\u1eadt ph\u00f9 h\u1ee3p v\u1edbi h\u1ec7 th\u1ed1ng c\u1ee7a m\u00ecnh.<\/em><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>IP Public l\u00e0 \u0111\u1ecba ch\u1ec9 IP duy nh\u1ea5t gi\u00fap thi\u1ebft b\u1ecb ho\u1eb7c m\u00e1y ch\u1ee7 c\u1ee7a b\u1ea1n giao ti\u1ebfp tr\u1ef1c ti\u1ebfp tr\u00ean Internet, kh\u00e1c h\u1eb3n d\u1ea3i IP Private ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng trong m\u1ea1ng n\u1ed9i b\u1ed9. Kh\u00f4ng ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c hai lo\u1ea1i IP n\u00e0y, b\u1ea1n s\u1ebd loay hoay khi m\u1edf port, c\u1ea5u h\u00ecnh VPN, g\u1eafn camera t\u1eeb<\/p>\n","protected":false},"author":2,"featured_media":42672,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[151],"tags":[],"class_list":["post-15823","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mang"],"_links":{"self":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/15823","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/comments?post=15823"}],"version-history":[{"count":10,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/15823\/revisions"}],"predecessor-version":[{"id":42675,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/15823\/revisions\/42675"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/42672"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=15823"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=15823"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=15823"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}