Database connection Error - Using NETLIFY

Question

I have this project where I need to insert the content of a website to my local SQL Server. This website has a webhook feature where I can connect using a valid URL.

I have to use this webhook to track the changes that are made on this site.

So, I'm using Netlify to create a valid URL and then creating a function to re-direct the content received from the webhook to my local server, where I already configured ports, firewalls and IPs Fowardings.

But when I deploy de function to Netlify, trigger the webhook, and check the log of the function, it says that it couldn't connect to my server.

12:10:43 PM: 4935afd1 ERROR  Unhandled Promise Rejection
    {"errorType":"Runtime.UnhandledPromiseRejection","errorMessage":"ConnectionError:
Failed to connect to <my_external_ip>:<my_port> in
15000ms"

Here is the code that i deploy in Netlify:

const connStr = "Server=<my_external_ip>,<my_port>;Database=<my_db>;User Id=<my_usr>;Password=<my_pass>;trustServerCertificate=true;";
const sql = require("mssql");

exports.handler = async (event, context) => {
  try {
    const body = JSON.parse(event.body); 
    
    // Inicio do Banco
    teste = sql.connect(connStr)
    .then(conn => insertTable(connStr, body))
    .catch(err => console.log("erro! " + err));


    function insertTable(conn, body){
      const col1 = body.col1
      const col2 = body.col2
      const col3 = body.col3
            
      new sql.Request().query(`INSERT INTO <TABLE_NAME> (COL1, COL2, COL3) VALUES ('${col1}', '${col2}', ${col3})`, (err, result) => {
      console.dir(result)
    })
}
    // Fim do Banco

    console.log("Submitted!");
    return {
      statusCode: 204,
    };
  } catch (err) {
    return { statusCode: 500, body: err.toString() };
  }
};

I think my server's configuration is ok because I can remotely connect through SSMS to my database.