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After upgrading Nprinting to the February 2018 release, API calls fail with the error "TLS handshake error from [::1]:64327: tls: client offered an unsupported, maximum protocol version of 301"
Article Number: 000051501 | Last Modified: 2018/09/07Description
In applications that rely on the Nprinting API, they may stop working after upgrading to the February 2018 release and higher. The error "TLS handshake error from [::1]:64327: tls: client offered an unsupported, maximum protocol version of 301" is present in the logs.
Environments:
Environments:
- Qlik Nprinting, February 2018 release and higher
Cause
Prior to February 2018, the minimum TLS version was 1.0.
In February 2018 and higher, that minimum value is now 1.1; applications not compliant with this requirement will not be allowed to make API calls.
In February 2018 and higher, that minimum value is now 1.1; applications not compliant with this requirement will not be allowed to make API calls.
Resolution
Ensure your custom code is using at least TLS version 1.1.
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