Active Directory Node.js给出了身份验证错误

Question

我是nodejs的新手。我正在尝试使用activedirectory lib对Active Directory进行身份验证。但是我面临以下问题...

{"errno":"EACCES","code":"EACCES","syscall":"connect","address":"xxx.xxx.x.xx","port":389}

我不知道为什么会发生此问题。相同的代码可以在另一台服务器上正常工作。

代码

var ActiveDirectory = require('activedirectory');
    var adConfig = {
        url: 'ldap://xxx.xxx',
        baseDN: 'dc=xxx,dc=xxx'
    }

我写了一个REST API来从AD验证用户身份

app.post('/api/authenticate', authenticate);

function authenticate(req, res) {
    var ad = new ActiveDirectory(adConfig);

    ad.authenticate(req.body.username, req.body.password, function (err, auth) {
        if (err) {
            console.log('ERROR AD: ' + JSON.stringify(err));
            res.send({ message: "Something went wrong", success: false, code: "5001" });
            return;
        }

        if (auth) {
            console.log('Authenticated!');
            console.log(auth);
        }
        else {
            console.log('Authentication failed!');
            res.send({ message: 'Authentication failed!', success: false, code: "5001" });
        }
    });
}