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ONTAP Tools 10: Update Secure Cipher Suites for OTV Gateway

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Applies to

  • ONTAP Tools for VMware vSphere (OTV) 10.5 only

Description

Note: There is a script available that will perform the steps outlined in the procedure.

This KB describes how to harden the Gateway TLS configuration by removing legacy Diffie-Hellman (DHE) cipher suites from the Gateway NGINX configuration. 

This change removes the following TLS 1.2 cipher suites from the Gateway listener (example: 8443): 

  • DHE-RSA-AES256-GCM-SHA384
  • DHE-RSA-AES128-GCM-SHA256 
     

Impact / Downtime 

  • No pod restart required; typically no downtime. 
     

Prerequisites 

  • Kubernetes access with permissions to:
    • View pods/configmaps
    • Edit ConfigMaps
    • Exec into pods (for reload/validation)
  • Identify the following pod names: 
    • Gateway pod name (example: <GATEWAY_POD>) 
    • Gateway service endpoint for external validation (example: <GATEWAY_IP_OR_DNS>) 

Note: Logging into the OTV10 remote diagnostics shell with the diag user will provide you the ability to perform the tasks outlined in this article

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