System registration fails with error Connect to sso.redhat.com:443 failed: Connection refused

Solution Verified - Updated -

Issue

  • Unable to register the system using subscription manager
  • System registration fails with error HTTP error (401 - Unauthorized): HTTP Request failed
  • Registration of the system fails with below error
   # subscription-manager register 
    Username: ****** 
    Password: 
    HTTP error (401 - Unauthorized): HTTP Request failed: org.apache.http.conn.HttpHostConnectException: Connect to 
    sso.redhat.com:443 [sso.redhat.com/xx.xx.xx.xx] failed: Connection refused (Connection refused)

Environment

  • Red Hat Enterprise Linux Server 7
  • Red Hat Subscription Management

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