HI @Riyad_Sm, I know there was another thread you had where you were getting timeouts even though other’s were able to connect to your Atlas cluster without issue.
According to this post you got things to work. Are you having problems once more? This post (the one were in now) appears to be dated before the post I linked above.
It’s best not to put the same problem in multiple posts as it makes it difficult for those trying to help out follow along with the progress of resolution to the problem.