Can't produce messages to Apache Kafka from outside Hortonworks HDP sandbox 2.5 - apache-kafka

Question

I have a problem trying to produce messages to Apache Kafka topic from outside of Hortonworks HDP Sandbox. Right now I am using version 2.5 deployed to Azure but I experienced similar behaviour using HDP 2.6 on local VirtualBox. I was able to open port 6667 and confirm that TCP connection is getting through to the VM. I am also able to access the list of topics.
Using listeners=PLAINTEXT://0.0.0.0:6667
C:\GIT\kafka\bin\windows>kafka-console-producer.bat --broker-list MY_PUBLIC_IP:6667 --topic test1
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/C:/GIT/kafka/core/build/dependant-libs-2.11.11/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/C:/GIT/kafka/tools/build/dependant-libs-2.11.11/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/C:/GIT/kafka/connect/api/build/dependant-libs/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/C:/GIT/kafka/connect/runtime/build/dependant-libs/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/C:/GIT/kafka/connect/file/build/dependant-libs/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/C:/GIT/kafka/connect/json/build/dependant-libs/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
>sadasdas
>[2017-11-04 23:06:14,672] WARN [Producer clientId=console-producer] Connection to node 1001 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
[2017-11-04 23:06:15,174] ERROR Error when sending message to topic test1 with key: null, value: 8 bytes with error: (org.apache.kafka.clients.producer.internals.ErrorLoggingCallback)
org.apache.kafka.common.errors.TimeoutException: Expiring 1 record(s) for test1-0: 1508 ms has passed since batch creation plus linger time
[2017-11-04 23:06:15,724] WARN [Producer clientId=console-producer] Connection to node 1001 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
[2017-11-04 23:06:16,875] WARN [Producer clientId=console-producer] Connection to node 1001 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient)
With the following configuration entries added:
advertised.port=6667
advertised.listeners=PLAINTEXT://MY_PUBLIC_IP:6667
advertised.host.name=MY_PUBLIC_IP
result:
C:\GIT\kafka\bin\windows>kafka-console-producer.bat --broker-list MY_PUBLIC_IP:6667 --topic test1
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/C:/GIT/kafka/core/build/dependant-libs-2.11.11/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/C:/GIT/kafka/tools/build/dependant-libs-2.11.11/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/C:/GIT/kafka/connect/api/build/dependant-libs/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/C:/GIT/kafka/connect/runtime/build/dependant-libs/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/C:/GIT/kafka/connect/file/build/dependant-libs/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/C:/GIT/kafka/connect/json/build/dependant-libs/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
>asdasd
[2017-11-04 22:37:11,713] WARN [Producer clientId=console-producer] Error while fetching metadata with correlation id 2 : {test1=LEADER_NOT_AVAILABLE} (org.apache.kafka.clients.NetworkClient)
Could you give me any advice as to what may be wrong? I'd like to stick with the sandbox for now.
UPDATE
I finally got it working. This was the solution:
advertised.listeners=PLAINTEXT://sandbox.hortonworks.com:6667
Seems like my Kafka can only talk to brokers when hostname is given, not IP...