Kafka TLS Setup Cheat Sheet

Certificates, listeners, and JAAS

Last Updated: November 21, 2025

Focus Areas

Focus
Generate keystores/truststores
Enforce hostname verification

Commands & Queries

keytool -genkeypair -alias broker -keystore kafka.server.keystore.jks
Create keystore
openssl s_client -connect broker:9093
Validate TLS
kafka-configs --alter --add-config 'ssl.endpoint.identification.algorithm=https'
Enable verification

Summary

TLS protects Kafka traffic between brokers and clients.

💡 Pro Tip: Rotate certificates with automation and verify trust stores before deploying.
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