Strimzi cluster authencation issue

[alokk-noida-techm]

I have a stimzi kafka cluster which is failing with below error, but we have the valid certificates

WARN [Producer clientId=console-producer] Connection to node -1 (kafka1./:443) terminated during authentication. This may happen due to any of the following reasons: (1) Authentication failed due to invalid credentials with brokers older than 1.0.0, (2) Firewall blocking Kafka TLS traffic (eg it may only allow HTTPS traffic), (3) Transient network issue. (org.apache.kafka.clients.NetworkClient)

Even tried to openssl command which is not showing up the acceptable client ca cert.

openssl s_client -connect kafka1.*:443
CONNECTED(00000005)
write:errno=0

no peer certificate available

No client certificate CA names sent

SSL handshake has read 0 bytes and written 328 bytes
Verification: OK

New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
Early data was not sent
Verify return code: 0 (ok)

[scholzj]

You did not share any configurations or anything. So it is really hard to help. An error like this normally suggests you are using client with TLS enabled to connect to non-TLS listener or the other way around.