How to check port open or not

Port Forwarding Tester

Many tools available to check port forwarding but open port checker is best tool. You can use to check your external IP address and detect open ports on your connection. This tool is useful for finding out if your port forwarding is setup correctly or if your server applications are being blocked by a firewall. This tool may also be used as a port scanner to scan your network for ports that are commonly forwarded. It is important to note that some ports, such as port 25, are often blocked at the ISP level in an attempt to prevent malicious activity.

This is a free tool available to check open ports.

https://www.yougetsignal.com/tools/open-ports/

Common Ports

21 FTP, 22 SSH, 80 HTTP, 443 HTTPS, 110 POP3, 53 DNS, 3389 Remote Desktop, 5900 VNC, 23 TELNET, 143 IMAP, 3306 MySQL, 1723 PPTP



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