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We have an ODBC Driver trying to connect through TLS , but fails. We tested using openssl with the following command and worked fine:

openssl s_client -connect xxx.com:31020

the server accepts TLS 1.0 to TLS 1.3 (downgraded just for debugging)

While Trying to connect , here is the wireshark handshake capture flow:

enter image description here

and also while expanding the client hello TLS, this is what we have :

enter image description here

Any idea what's causing the handshake not to start properly?

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1 Answer 1

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Since we are using ISTIO as Ingress Gateway with Kubernetes, the issue is related to ISTIO gateway config. We simply had to replace the matching host to '*' in ISTIO gateway config

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