Port scanning via a front-end webpage is used to detect open ports on a target IP or domain. This method has certain limitations. If you require more accurate scanning and detection, please use local tools.
Please separate multiple port numbers with ",", for example: 80,443,3306)
Limitations:
Cannot accurately determine port status:
Some ports may not return a response, cross-origin blocking, or CDN protection may result in false positives.
Can only detect HTTP services:
Can only detect HTTP responses; non-HTTP protocols (such as FTP and SSH) cannot be detected.
Browser limitations:
Front-end browsers can only send requests to public addresses.
Some security policies restrict requests to uncommon ports.