{"version":"1.0","provider_name":"ZYNOO Blog","provider_url":"https:\/\/zynoo.com\/blog\/vi\/","author_name":"Adam Weller","author_url":"https:\/\/zynoo.com\/blog\/vi\/author\/adam-weller\/","title":"T\u01b0\u1eddng l\u1eeda Ubuntu: C\u00e1ch thi\u1ebft l\u1eadp UFW tr\u00ean VPS","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"GxYdZxMc9b\"><a href=\"https:\/\/zynoo.com\/blog\/vi\/ubuntu-firewall-ufw\/\">T\u01b0\u1eddng l\u1eeda Ubuntu: C\u00e1ch thi\u1ebft l\u1eadp UFW tr\u00ean VPS<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/zynoo.com\/blog\/vi\/ubuntu-firewall-ufw\/embed\/#?secret=GxYdZxMc9b\" width=\"600\" height=\"338\" title=\"&#8220;T\u01b0\u1eddng l\u1eeda Ubuntu: C\u00e1ch thi\u1ebft l\u1eadp UFW tr\u00ean VPS&#8221; &#8212; ZYNOO Blog\" data-secret=\"GxYdZxMc9b\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/zynoo.com\/blog\/wp-includes\/js\/wp-embed.min.js\n<\/script>\n","thumbnail_url":"https:\/\/zynoo.com\/blog\/wp-content\/uploads\/2026\/11\/ubuntu-firewall.webp","thumbnail_width":1672,"thumbnail_height":941,"description":"T\u00ecm hi\u1ec3u c\u00e1ch c\u1ea5u h\u00ecnh t\u01b0\u1eddng l\u1eeda Ubuntu b\u1eb1ng UFW. Thi\u1ebft l\u1eadp truy c\u1eadp SSH an to\u00e0n, m\u1edf c\u1ed5ng, qu\u1ea3n l\u00fd quy t\u1eafc v\u00e0 b\u1ea3o v\u1ec7 VPS c\u1ee7a b\u1ea1n t\u1eebng b\u01b0\u1edbc."}