Compass - Unable to connect to any MongoDB Atlas database using compass or otherwise - mongodb

Question

I have been trying to connect to Atlas using the university.mongodb.com connection string:
mongodb+srv://m001-student:m001-mongodb-basics#cluster0-jxeqq.mongodb.net/test
But the compass GUI gives the following error:
queryTxt ETIMEOUT cluster-0-jxeqq.mongodb.net
I created my own cluster and tried again. But unfortunately, the same error showed up. I tried to write a JavaSript code as (the angular placeholders had the actual values in them):
const MongoClient = require('mongodb').MongoClient;
const uri = "mongodb+srv://<user>:<password>#cluster0.amffz.gcp.mongodb.net/<dbname>?retryWrites=true&w=majority";
const client = new MongoClient(uri, { useNewUrlParser: true });
client.connect(err => {
if (err) return console.log(err);
const collection = client.db("test").collection("collection-1");
client.close();
});
...which gave me this error:
Error: queryTxt ETIMEOUT cluster0.amffz.gcp.mongodb.net
at QueryReqWrap.onresolve [as oncomplete] (dns.js:202:19) {
errno: undefined,
code: 'ETIMEOUT',
syscall: 'queryTxt',
hostname: 'cluster0.amffz.gcp.mongodb.net'
}
In Atlas, I enabled the Network Access in the Security option to :
0.0.0.0/0
I disabled my firewall just to be sure that the connection is not being blocked:
sudo ufw disable
But nothing seems to work.
Any help?
[Edit]
System Config: Ubuntu 20.04 LTS

Answer 1

I figured out that the machine which I was using had some problem with the connectivity.
I figured out the way to solve this. I uninstalled MongoDB. It seemed like it had some configuration issues.
I removed mongodb and mongoose npm packages as well.
Re-installed everything. And viola, it got connected!