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SUSEConnect error tls unsupported protocol version 301

This document (000021390) is provided subject to the disclaimer at the end of this document.


SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server 12


Running "SUSEConnect" returns error:
SUSEConnect  -l
SUSEConnect error: Get "https://sles12smt.suse/connect/systems/activations": tls: server selected unsupported protocol version 301


Ensure that TLSv1.2 or higher is available on the RMT or SMT web server.

For RMT:
Check the file:
ssl_protocols       TLSv1.2 TLSv1.3;

For SMT:
Check the file:
SSLProtocol all -SSLv2 -SSLv3 -TLSv1


Newer "suseconnect-ng" versions are implemented in Golang.  
It communicates with the registration server using a RESTful JSON API over HTTP using TLS encryption.
The Golang TLS does not support versions less than TLSv1.2.

Additional Information

The newer "suseconnect-ng-1.7.0~git0.5338270-3.9.1" in SLES12-SP5 will not work with SMT from SLES11, nor if SMT does not allow TLSv1.2 or above. Older "SUSEConnect-0.3.36-3.18.4" versions will work.

To downgrade to the older SUSEConnect, remove these three packages:
Then downgrade to or install these three packages:
SUSEConnect              0.3.36-3.18.4
zypper-migration-plugin  0.10-12.4
yast2-registration  3.3.1-3.3.5


This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:000021390
  • Creation Date: 08-Mar-2024
  • Modified Date:11-Mar-2024
    • SUSE Linux Enterprise Server
    • SUSE Linux Enterprise Server for SAP Applications

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