Javamail API to Imail -- Java.Net.Socketexception: Permission Denied: Connect

JavaMail API to iMail -- java.net.SocketException: Permission denied: connect

Add -Djava.net.preferIPv4Stack=true to the VM options. Another way to confirm if it is the same issue, in Netbeans, right click on the project > properties > Libraries and choose a JDK 6 Java Platform (install if you do not have it). Clean, build then try again. This will eliminate this issue as the problem

Credit https://stackoverflow.com/a/7478027/643500

JavaMail SocketException: Permission denied: connect

Possibly the property needs to be set when the JVM starts? Try running with "java -Djava.net.preferIPv4Stack=true -jar ...."

Possibly you have some anti-virus or firewall that preventing "java" from connecting, but allowing "telnet" to connect? Try turning off any anti-virus or firewall temporarily to test.

Javamail Permission denied: Connect after build

How are you running your program?

If you run it with "java -jar myprog.jar", use "java -Djava.net.preferIPv4Stack=tru -jar myprog.jar".

If you run it by double clicking the jar file or something like that, you might need to set the property in your code, by adding System.setProperty("java.net.preferIPv4Stack", "true");

JavaMail connection problems

java.net.SocketException: Permission denied: connect

This means you connected to the server and port and the server actively denied your connection.

If you try and telnet to this server and port you might get a more descriptive message, either way, that port isn't going to work.

Most likely that port 25 is blocked as a security measure, this is pretty standard settings for most companies.

Since you are using Outlook can't find the port in the settings, I am assuming you are connecting to an Exchange server, which might not even have SMTP enabled at all if your entire company is a Microsoft Outlook shop.

You will need to contact your system admin team to find out what port and protocol you should actually be using.

I get java.net.SocketException: Permission denied: connect when sending an email in Jenkins

Arguments after the -jar argument will be passed to the application, not the java vm. So try moving -Djava.net.preferIPv4Stack=true before the -jar argument.

Azure - permission denied when trying to connect to external MySQL database

I tired to reproduce your issue but failed.

Here , I tried to create a java spring-boot project to test connection with Azure MySQL Database.

Snippet of my code:

    private static String hostName = "<your host name>";
    private static String dbName = "sys";
    private static String user = "<user name>";
    private static String password = "password";
    private static String portNumber = "3306";

    @RequestMapping("/hello")
    public String index() throws SQLException {
        Connection conn = null;
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
        } catch (ClassNotFoundException e1) {
            e1.printStackTrace();
        }
        try {
            String url = "jdbc:mysql://"+hostName+":"+portNumber+"/"+dbName+"?verifyServerCertificate=true&useSSL=true&requireSSL=false&serverTimezone=UTC";
            conn = DriverManager.getConnection(url, user, password);

        } catch (SQLException e) {
            System.out.println("error!!!!");
            System.out.println(e.getMessage());
            e.printStackTrace();
            return e.getMessage();
        }
        return conn.getCatalog();
    }

My web.config file:

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <system.webServer>
    <handlers>
      <add name="httpPlatformHandler" path="*" verb="*" modules="httpPlatformHandler" resourceType="Unspecified" />
    </handlers>
    <httpPlatform processPath="%JAVA_HOME%\bin\java.exe"
        arguments="-Djava.net.preferIPv4Stack=true -Dserver.port=%HTTP_PLATFORM_PORT% -jar "%HOME%\site\wwwroot\demo-0.0.1-SNAPSHOT.jar"">
    </httpPlatform>
  </system.webServer>
</configuration>

You could check points as below if you can not connect to your database:

1.Don't miss set SSL parameters.

2.Please set white IP address of your azure web app.

3.Don't miss -Djava.net.preferIPv4Stack=true setting in your web.config.

You could find more details from this thread: JavaMail API to iMail -- java.net.SocketException: Permission denied: connect

Hope it helps you.

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