I am unable to access digital ocean droplet

I recently created a droplet for ubuntu 16.04. Following one of the tutorials I set up ssh login and disabled login with username password. I also set up a firewall.

I am able to login to my droplet using my ssh keys. I then purchased a domain and pointed it to the digitalocean nameservers. I have checked the details and the domain is pointing to the correct location.

I initiated a process to print a string in my droplet. If I open another console within the droplet and fire the command ‘curl localhost:8124’, it returns me the correct output. However if I try accessing the process using the ip address like ‘curl <ip address>:8124’, I get an error message. This command does not work even if I fire it within the digital ocean console.

I have modified my firewall settings to accept TCP connections for port 8124. I am not able to figure out what is the error.

Kindly let me know if my question seems to be ambiguous and needs more clarity.