{"id":818,"date":"2026-07-17T07:15:50","date_gmt":"2026-07-17T07:15:50","guid":{"rendered":"https:\/\/rufreevpn.org\/"},"modified":"2026-07-17T07:16:33","modified_gmt":"2026-07-17T07:16:33","slug":"port-checker","status":"publish","type":"page","link":"https:\/\/rufreevpn.org\/pt\/port-checker\/","title":{"rendered":"Verificador de Portas"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"818\" class=\"elementor elementor-818\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-350f56c e-con-full e-flex e-con e-parent\" data-id=\"350f56c\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f99c649 elementor-widget elementor-widget-html\" data-id=\"f99c649\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<style>\r\n.np-vpn-tool,.np-vpn-tool *{box-sizing:border-box}.np-vpn-tool{--accent:#5fa5fa;--accent-dark:#1d64c8;--accent-soft:rgba(95,165,250,.15);--text:#101828;--muted:#667085;--line:#e5e7eb;--panel:#fff;--soft:#f8fafc;max-width:820px;margin:0 auto;padding:24px 16px;color:var(--text);font-family:Arial,Helvetica,sans-serif}.np-vpn-hero{text-align:center;margin-bottom:26px}.np-vpn-kicker{display:inline-flex;align-items:center;min-height:30px;padding:0 11px;border-radius:999px;background:var(--accent-soft);color:var(--accent-dark);font-size:13px;font-weight:850;margin-bottom:12px}.np-vpn-hero h1{margin:0;color:var(--text);font-size:clamp(34px,5vw,56px);line-height:1.05;font-weight:850;letter-spacing:0}.np-vpn-hero p{max-width:680px;margin:14px auto 0;color:var(--muted);font-size:17px;line-height:1.65}.np-vpn-card{border:1px solid var(--line);border-radius:10px;background:var(--panel);box-shadow:0 12px 30px 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var(--accent);border-radius:8px;background:#f5faff;color:#1d64c8;font-size:14px}.np-vpn-error.is-active{display:block}.np-vpn-note{margin-top:14px;color:var(--muted);font-size:13px;line-height:1.55}@media(max-width:620px){.np-vpn-row,.np-vpn-two,.np-vpn-grid{grid-template-columns:1fr}.np-vpn-head,.np-vpn-form,.np-vpn-result{padding-left:18px;padding-right:18px}.np-vpn-error{margin-left:18px;margin-right:18px}}\r\n<\/style>\r\n<div class=\"np-vpn-tool\" data-root=\"port\">\r\n  <div class=\"np-vpn-hero\">\r\n    <div class=\"np-vpn-kicker\">Network Port Tool<\/div>\r\n    <h1>Port Checker<\/h1>\r\n    <p>Check whether a TCP port is open on a host from your WordPress backend server.<\/p>\r\n  <\/div>\r\n  <div class=\"np-vpn-card\">\r\n    <div class=\"np-vpn-head\"><h2>Check Open Port<\/h2><p>Check whether a TCP port is open on a host from your WordPress backend server.<\/p><\/div>\r\n    <form class=\"np-vpn-form\" data-form><div class=\"np-vpn-two\"><input class=\"np-vpn-input\" name=\"host\" placeholder=\"example.com\" required><input class=\"np-vpn-input\" name=\"port\" placeholder=\"443\" required><button class=\"np-vpn-btn\" type=\"submit\">Check Port<\/button><\/div><\/form>\r\n    <div class=\"np-vpn-error\" data-error><\/div>\r\n    <div class=\"np-vpn-result\" data-result><\/div>\r\n  <\/div>\r\n<\/div>\r\n<script>\r\n(function(){\r\nconst toolId='port';\r\n\r\nconst root=(document.currentScript&&document.currentScript.previousElementSibling&&document.currentScript.previousElementSibling.matches('.np-vpn-tool'))?document.currentScript.previousElementSibling:document.querySelector('.np-vpn-tool[data-root=\"'+toolId+'\"]');\r\nconst apiBase=window.NP_VPN_TOOLS_API_BASE||'\/wp-json\/np-vpn-tools\/v1';\r\nfunction esc(v){return String(v??'').replace(\/[&<>\"']\/g,c=>({'&':'&amp;','<':'&lt;','>':'&gt;','\"':'&quot;',\"'\":'&#039;'}[c]));}\r\nfunction summary(type,title,desc){return '<div class=\"np-vpn-summary '+type+'\"><div><strong>'+esc(title)+'<\/strong><span>'+esc(desc||'')+'<\/span><\/div><\/div>';}\r\nfunction kv(label,value){return '<div class=\"np-vpn-kv\"><small>'+esc(label)+'<\/small><strong>'+esc(value===''||value==null?'None':value)+'<\/strong><\/div>';}\r\nfunction grid(items){return '<div class=\"np-vpn-grid\">'+items.join('')+'<\/div>';}\r\nfunction code(v){return '<pre class=\"np-vpn-code\">'+esc(v||'')+'<\/pre>';}\r\nfunction list(items,fallback){if(!items||!items.length)return '<div class=\"np-vpn-list\"><div class=\"np-vpn-list-item\">'+esc(fallback||'No data.')+'<\/div><\/div>';return '<div class=\"np-vpn-list\">'+items.map(x=>'<div class=\"np-vpn-list-item\">'+esc(typeof x==='string'?x:JSON.stringify(x,null,2))+'<\/div>').join('')+'<\/div>';}\r\nfunction result(html){const r=root.querySelector('[data-result]');r.innerHTML=html;r.classList.add('is-active');}\r\nfunction err(msg){const e=root.querySelector('[data-error]');e.textContent=msg;e.classList.add('is-active');}\r\nfunction clearErr(){const e=root.querySelector('[data-error]');e.textContent='';e.classList.remove('is-active');}\r\nasync function json(url,opt){const res=await fetch(url,opt||{headers:{Accept:'application\/json'}});const contentType=res.headers.get('content-type')||'';const data=contentType.includes('application\/json')?await res.json():await res.text();if(!res.ok)throw new Error(data&&data.message?data.message:'Request failed');return data;}\r\nfunction loading(btn,on){if(!btn)return;if(!btn.dataset.label)btn.dataset.label=btn.textContent;btn.disabled=on;btn.textContent=on?'Checking...':btn.dataset.label;}\r\nfunction initForm(handler){const form=root.querySelector('[data-form]');if(!form)return;form.addEventListener('submit',async e=>{e.preventDefault();clearErr();const btn=form.querySelector('button');loading(btn,true);try{await handler(new FormData(form));}catch(ex){err(ex.message||'Request failed.')}finally{loading(btn,false)}});}\r\n\r\ninitForm(async(fd)=>{const d=await json(apiBase+'\/port?host='+encodeURIComponent(fd.get('host'))+'&port='+encodeURIComponent(fd.get('port')));result(summary(d.open?'good':'bad',d.open?'Port is open':'Port is closed or filtered','Latency: '+d.latency_ms+' ms')+grid([kv('Host',d.host),kv('Port',d.port),kv('Open',d.open?'Yes':'No'),kv('Latency',d.latency_ms+' ms')])+code(d.error||'Connection succeeded.'));});\r\n})();\r\n<\/script>\r\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f138862 elementor-widget elementor-widget-html\" data-id=\"f138862\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<div class=\"np-port-wide-wrapper\">\r\n\r\n    <div class=\"np-port-wide-section\">\r\n        <span class=\"np-port-wide-tag\">Knowledge Base<\/span>\r\n        <h2 class=\"np-port-wide-title\">What is a Port Checker?<\/h2>\r\n        <div class=\"np-port-wide-intro-grid\">\r\n            <div class=\"np-port-wide-intro-col\">\r\n                <p class=\"np-port-wide-text\">\r\n                    In computer networking, an <strong>IP Address<\/strong> identifies a specific device on a network, while a <strong>Network Port<\/strong> acts as a specific digital gate or channel through which data flows. Think of the IP address as an apartment building, and the ports as individual apartment numbers. Different applications use different ports to handle data traffic simultaneously without interference.\r\n                <\/p>\r\n                <p class=\"np-port-wide-text\">\r\n                    A <strong>Port Checker<\/strong> is an essential network diagnostic utility designed to test if a specific external port is open or closed on your public IP address. It operates by attempting to establish a direct TCP connection from our external scanning server to your target IP and designated port number.\r\n                <\/p>\r\n            <\/div>\r\n            <div class=\"np-port-wide-intro-col\">\r\n                <p class=\"np-port-wide-text\">\r\n                    If the server accepts the connection, the port is flagged as <strong>Open<\/strong>, meaning an application or service is actively listening and reachable from the public internet. If the request times out or is rejected, the port is flagged as <strong>Closed<\/strong> or filtered, which indicates that no service is running, or a firewall is actively blocking inbound traffic.\r\n                <\/p>\r\n                <p class=\"np-port-wide-text\">\r\n                    Running an external port scan is vital for setting up remote desktop access, self-hosting web servers, configuring VPN protocols, or debugging security firewalls. It allows you to verify that your local router's port forwarding rules are functioning correctly without exposing your network to unintended security risks.\r\n                <\/p>\r\n            <\/div>\r\n        <\/div>\r\n    <\/div>\r\n\r\n    <div class=\"np-port-wide-section\">\r\n        <h2 class=\"np-port-wide-title\" style=\"text-align: center; margin-bottom: 40px;\">How to Use It<\/h2>\r\n        <div class=\"np-port-wide-steps\">\r\n            <div class=\"np-port-wide-step-item\">\r\n                <div class=\"np-port-wide-step-header\">\r\n                    <span class=\"np-port-wide-step-badge\">1<\/span>\r\n                    <h4 class=\"np-port-wide-step-head\">Identify Target IP<\/h4>\r\n                <\/div>\r\n                <p class=\"np-port-wide-step-desc\">Enter the public IP address or domain name you want to scan. The tool will automatically pre-fill your current public IP address by default.<\/p>\r\n            <\/div>\r\n            <div class=\"np-port-wide-step-item\">\r\n                <div class=\"np-port-wide-step-header\">\r\n                    <span class=\"np-port-wide-step-badge\">2<\/span>\r\n                    <h4 class=\"np-port-wide-step-head\">Specify Port Numbers<\/h4>\r\n                <\/div>\r\n                <p class=\"np-port-wide-step-desc\">Type in the specific port number you want to verify (e.g., 80, 443, 22) or choose from our list of commonly monitored applications.<\/p>\r\n            <\/div>\r\n            <div class=\"np-port-wide-step-item\">\r\n                <div class=\"np-port-wide-step-header\">\r\n                    <span class=\"np-port-wide-step-badge\">3<\/span>\r\n                    <h4 class=\"np-port-wide-step-head\">Analyze Connection Status<\/h4>\r\n                <\/div>\r\n                <p class=\"np-port-wide-step-desc\">Click the check button and instantly review the diagnostic status grid, confirming whether the gate is Open or Closed to the public web.<\/p>\r\n            <\/div>\r\n        <\/div>\r\n        <div class=\"np-port-wide-banner\">\r\n            <p class=\"np-port-wide-banner-desc\">\r\n                <strong>Security Reminder:<\/strong> Leaving unnecessary ports open to the public internet creates a massive security vulnerability, allowing hackers to scan your network for software exploits. Only open ports that are absolutely required, and secure them with strong credentials and strict firewalls.\r\n            <\/p>\r\n        <\/div>\r\n    <\/div>\r\n\r\n    <div class=\"np-port-wide-section\">\r\n        <h2 class=\"np-port-wide-title\" style=\"text-align: center; margin-bottom: 12px;\">Frequently Asked Questions<\/h2>\r\n        <p class=\"np-port-wide-subtitle\" style=\"text-align: center; margin-bottom: 40px;\">Learn about port forwarding, connection errors, firewalls, and network vulnerability mapping.<\/p>\r\n        \r\n        <div class=\"np-port-wide-faq-wrapper\">\r\n            <div class=\"np-port-wide-faq-item\">\r\n                <input type=\"checkbox\" id=\"port-faq-1\" class=\"np-port-wide-faq-toggle\">\r\n                <label for=\"port-faq-1\" class=\"np-port-wide-faq-question\">\r\n                    What does an \"Open Port\" actually mean?\r\n                    <span class=\"np-port-wide-faq-icon\"><\/span>\r\n                <\/label>\r\n                <div class=\"np-port-wide-faq-answer\">\r\n                    <p>An open port means that a network application on your device is actively listening for incoming connection requests on that channel, and your router's firewall is allowing external packets through. For example, a web server needs port 80 or 443 open so that external users can load the website inside their web browsers.<\/p>\r\n                <\/div>\r\n            <\/div>\r\n\r\n            <div class=\"np-port-wide-faq-item\">\r\n                <input type=\"checkbox\" id=\"port-faq-2\" class=\"np-port-wide-faq-toggle\">\r\n                <label for=\"port-faq-2\" class=\"np-port-wide-faq-question\">\r\n                    Why does the tool show a port is closed when the service is running?\r\n                    <span class=\"np-port-wide-faq-icon\"><\/span>\r\n                <\/label>\r\n                <div class=\"np-port-wide-faq-answer\">\r\n                    <p>This discrepancy is usually caused by one of three common blockades: First, your local router is blocking the traffic because you haven't configured a Port Forwarding rule to direct traffic to your specific device. Second, your operating system's software firewall (like Windows Defender or ufw) is blocking inbound requests. Third, your Internet Service Provider (ISP) might be blocking the port at the carrier level.<\/p>\r\n                <\/div>\r\n            <\/div>\r\n\r\n            <div class=\"np-port-wide-faq-item\">\r\n                <input type=\"checkbox\" id=\"port-faq-3\" class=\"np-port-wide-faq-toggle\">\r\n                <label for=\"port-faq-3\" class=\"np-port-wide-faq-question\">\r\n                    What are some of the most common default network ports?\r\n                    <span class=\"np-port-wide-faq-icon\"><\/span>\r\n                <\/label>\r\n                <div class=\"np-port-wide-faq-answer\">\r\n                    <p>Standardized ports handle specific internet protocols. Common numbers include: <strong>Port 21<\/strong> for FTP (File Transfer), <strong>Port 22<\/strong> for SSH (Secure Shell remote access), <strong>Port 25<\/strong> for SMTP email routing, <strong>Port 80<\/strong> for standard unencrypted HTTP web traffic, <strong>Port 443<\/strong> for secure HTTPS encrypted browsing, and <strong>Port 3389<\/strong> for Windows Remote Desktop (RDP).<\/p>\r\n                <\/div>\r\n            <\/div>\r\n\r\n            <div class=\"np-port-wide-faq-item\">\r\n                <input type=\"checkbox\" id=\"port-faq-4\" class=\"np-port-wide-faq-toggle\">\r\n                <label for=\"port-faq-4\" class=\"np-port-wide-faq-question\">\r\n                    What is Port Forwarding and why is it necessary?\r\n                    <span class=\"np-port-wide-faq-icon\"><\/span>\r\n                <\/label>\r\n                <div class=\"np-port-wide-faq-answer\">\r\n                    <p>Your router uses a system called NAT to share a single public IP address among all local devices in your home network (like your PC, phone, and console). When an external request hits your router on a specific port, the router doesn't know which device should receive it. Port Forwarding tells your router, \"Send any incoming traffic on Port 80 directly to my local web server at 192.168.1.50.\"<\/p>\r\n                <\/div>\r\n            <\/div>\r\n\r\n            <div class=\"np-port-wide-faq-item\">\r\n                <input type=\"checkbox\" id=\"port-faq-5\" class=\"np-port-wide-faq-toggle\">\r\n                <label for=\"port-faq-5\" class=\"np-port-wide-faq-question\">\r\n                    Can an active VPN connection alter my port checker results?\r\n                    <span class=\"np-port-wide-faq-icon\"><\/span>\r\n                <\/label>\r\n                <div class=\"np-port-wide-faq-answer\">\r\n                    <p>Yes, significantly. When your VPN is connected, your traffic routes through a remote server, changing your public IP address to the VPN server's IP. If you run a port check, you are testing the ports on the VPN server, not your home router. Because almost all premium VPN providers block all inbound ports by default to protect their users, the test will usually report the ports as closed.<\/p>\r\n                <\/div>\r\n            <\/div>\r\n\r\n            <div class=\"np-port-wide-faq-item\">\r\n                <input type=\"checkbox\" id=\"port-faq-6\" class=\"np-port-wide-faq-toggle\">\r\n                <label for=\"port-faq-6\" class=\"np-port-wide-faq-question\">\r\n                    What is Carrier-Grade NAT (CGNAT) and how does it block ports?\r\n                    <span class=\"np-port-wide-faq-icon\"><\/span>\r\n                <\/label>\r\n                <div class=\"np-port-wide-faq-answer\">\r\n                    <p>CGNAT is a deployment strategy utilized by many cellular providers and residential ISPs where thousands of separate household routers share a single public IP address managed at the ISP data center. If your connection is behind CGNAT, traditional router-level port forwarding will fail completely, and all inbound ports will show up as closed because you do not have exclusive access to the public IP gateway.<\/p>\r\n                <\/div>\r\n            <\/div>\r\n        <\/div>\r\n    <\/div>\r\n\r\n<\/div>\r\n\r\n<style>\r\n.np-port-wide-wrapper {\r\n    max-width: 1100px;\r\n    margin: 40px auto;\r\n    padding: 0 16px;\r\n    box-sizing: border-box;\r\n    font-family: Arial, Helvetica, sans-serif !important;\r\n    color: #101828 !important;\r\n}\r\n\r\n.np-port-wide-section {\r\n    background: #ffffff !important;\r\n    border: 1px solid #e5e7eb !important;\r\n    border-radius: 12px !important;\r\n    box-shadow: 0 10px 30px rgba(16, 24, 40, 0.04) !important;\r\n    padding: 50px !important;\r\n    margin-bottom: 30px !important;\r\n    box-sizing: border-box !important;\r\n}\r\n\r\n.np-port-wide-tag {\r\n    display: inline-block !important;\r\n    background-color: 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!important;\r\n    user-select: none !important;\r\n    -webkit-tap-highlight-color: transparent !important;\r\n}\r\n\r\n.np-port-wide-faq-icon {\r\n    position: relative !important;\r\n    width: 14px !important;\r\n    height: 14px !important;\r\n    flex-shrink: 0 !important;\r\n    margin-left: 20px !important;\r\n    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;\r\n}\r\n\r\n.np-port-wide-faq-icon::before,\r\n.np-port-wide-faq-icon::after {\r\n    content: \"\" !important;\r\n    position: absolute !important;\r\n    background-color: #5fa5fa !important;\r\n    transition: all 0.25s ease !important;\r\n}\r\n\r\n.np-port-wide-faq-icon::before {\r\n    top: 6px !important;\r\n    left: 0 !important;\r\n    width: 14px !important;\r\n    height: 2px !important;\r\n}\r\n\r\n.np-port-wide-faq-icon::after {\r\n    top: 0 !important;\r\n    left: 6px !important;\r\n    width: 2px !important;\r\n    height: 14px !important;\r\n}\r\n\r\n.np-port-wide-faq-answer {\r\n  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Check Open Port Check whether a TCP port is open on a host from your WordPress backend server. Check Port Knowledge Base What is a Port Checker? 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