Why I cannot connect to Kafka from outside?

Question

I am running kafka on ec2 instance. So amazon ec2 instance has two ips one is internal ip and second one is for external use.

I created producer from local machine,

Answer 1

For EC2 you should edit the /etc/hosts file to add:

XXX.XXX.XXX.XXX ip-YYY-YYY-YYY-YYY

where XXX... is your external IP and the ip-YYY-YYY-YYY-YYY is the string returned by the hostname command. You can use 127.0.0.1 instead of your external IP to communicate inside the server.

host.name is deprecated - as are advertised.host.name and advertised.port