bind kafka tcp port to localhost instead of 0.0.0.0

[Qiong Wu Q]

Hi,
     kafka vertion: kafka_2.11-0.10.2.0.
     I change the config files in kafka and I can bind 9092 and 2181 to 
localhost. But then I check the tcp port, I find that there are another two tcp 
port used by kafka. The two ports always change after start kafka.

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I want to know what the use of the two ports. can I bind then to localhost and 
how?



BR,

Qiong.q.wu