Port Scanner Tool

Simply leverage our port checker, designed to identify open and closed ports. It combines traditional TCP and UDP scanning techniques to ensure 100% accurate results. This helps you understand your network's connectivity status and flag potential vuln

From single hosts and domains to bulk IP ranges, our online port scanner with Nmap adapts to your scope. Run scheduled or parallel scans with notifications, use API access for automation, and integrate results into your workflows without extra scripting.

Free online port scanner tool to check if TCP or UDP ports are open or closed on any domain or IP address. Essential for network troubleshooting and server configuration.

Test and verify servers, firewalls and network perimeters with Nmap Online providing the most accurate port status of a systems Internet footprint. The Port.Tools works well on both desktop and mobile browser.

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端口掃描器乃一項免費實用工具，能便利地協助您偵測設備上的開放端口。 該工具能自動識別您的IP地址，並檢視您設備上開放且未受保護的端口，這些端口可能成為黑客、病毒與特洛伊木馬侵入您系統的途徑。 何謂端口掃描器？ 開放端口掃描器運用nmap技術，對您的設備進行檢測，以識別可能存在安全隱患的開放系統端口。 其功能包括： 迅速識別處於啟動狀態，預備接收或傳送資料的系統端口。 透過監控開放端口的活動，您能瞭解哪些應用程式和服務正在您的系統中運作。 端口掃描乃一項便捷的安全防護，助您抵禦潛在的駭客威脅。 何謂網路端口

With this online TCP port scanner you can scan an IP address for open ports. Use this TCP port scan tool to view open ports, port scan your server, test your firewall.