Bind kafka to 0.0.0.0:9092 - amazon-ec2

Question

I have set up Kafka on my amazon ec2 machine running ubuntu-18 following this blog plost and this is how it is exposing the ports.
tcp 0 0 127.0.0.53:53 0.0.0.0:* LISTEN 772/systemd-resolve
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1220/sshd
tcp 0 0 0.0.0.0:3004 0.0.0.0:* LISTEN 1041/mongod
tcp6 0 0 :::45827 :::* LISTEN 2059/java
tcp6 0 0 :::9092 :::* LISTEN 2136/java
tcp6 0 0 :::2181 :::* LISTEN 2059/java
tcp6 0 0 :::32851 :::* LISTEN 2136/java
tcp6 0 0 :::22 :::* LISTEN 1220/sshd
how can I bind it to 0.0.0.0:9092?

Answer 1

how can I bind it to 0.0.0.0:9092
:::9092 should be all you need for binding on IPv6.
If you want to force IPv4, please refer kafka binding to ipv6 port even though ipv4 address specified in config
You can also add this to server.properties to explicitly bind to all interfaces
listeners=PLAINTEXT://0.0.0.0:9092
But when set, you also need to set (and uncomment) advertised.listeners to the external interface address (IP or hostname) that clients should use to communicate to that server, as mentioned in the property file.
# If not set, it uses the value for "listeners".
#advertised.listeners=PLAINTEXT://your.host.name:9092
More details here if you need something more complex https://www.confluent.io/blog/kafka-listeners-explained

Answer 2

I am doing this on aws ec2 running ubuntu 18, the blog post shared in the first answer provides detailed information on how to go about this kind of challenge. The main challenge was failing to get a broker connection from the machine.
What worked is to add your machines public DNS(ec2......com) to advertised listeners.
I made the edit in server.properties file and like
advertised.listeners=PLAINTEXT://public DNS(ec2......com):9092