端口在线检测工具

关于端口在线检测工具:

这个在线开放端口在线检测工具可以帮助您检测任何服务器是否在特定端口开放, 也可以检测您的服务器端口转发设置是否正确. 常用端口列表:

常用端口	简介
21	FTP (File Transfer Protocol)
22	SSH (Secure Shell)
23	TELNET (Remote Login Service)
25	SMTP (Simple Mail Transfer Protocol)
53	DNS (Domain Name System)
80	HTTP (Hypertext Transfer Protocol)
110	POP3 (Post Office Protocol)
115	SFTP (Simple File Transfer Protocol)
443	TLS/SSL (Transport Layer Security)
3306	MySQL Database
8080	Apache Tomcat Web Server

用Python进行端口检测 (用 package socket):

import socket


def port_checker(ip_address_or_domain, port_number):
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    try:
        sock.connect((str(ip_address_or_domain), int(port_number)))
        return "PORT {0} is OPEN on '{1}'.".format(port_number, ip_address_or_domain)
    except Exception as e:
        print(str(e))
        return "PORT {0} is CLOSED on '{1}'.".format(port_number, ip_address_or_domain)
    finally:
        sock.close()


print(port_checker('coding.tools', 443))

-------------------
PORT 443 is OPEN on 'coding.tools'.

用Java进行端口检测 (用 package java.net.Socket):

import java.io.IOException;
import java.net.Socket;

public class Port {
    public static boolean check_port(String ip_or_domain, int port) {
        try (Socket server = new Socket(ip_or_domain, port)) {
            System.out.println("Port " + port + " is OPEN on " + ip_or_domain);
            return true;
        } catch (IOException ignored) {
            System.out.println("Port " + port + " is CLOSED on " + ip_or_domain);
            return false;
        }
    }

    public static void main(String[] args) {
        boolean is_open = check_port("93.184.216.34", 443);
    }
}

-------------------
Port 443 is OPEN on 93.184.216.34