MongoDB not running on the provided host and port-02Nov2018

I am getting “MongoDB not running on the provided host and port” when tried to connect to AWS server mentioned as part of Mongo DB Basics.

i have tried all the scenarios provided in the similar topics. but still i am not able to connect to the server.
i am attaching the screenshots for your reference

nevermind. issue got resolved. i have connected to my person wifi instead of office wifi. now its working

@Pradeep_13528: In that case you may need to open some ports in your personal router/firewall in my opinion. At least worth to check out.

Kind regards,