How to use MAC (message authentication code) algorithms with SHA2 ? on SSH

Solution In Progress - Updated -

Issue

openssh-5.3p1-84.1.el6 dose not work MACs with SHA2 well.
How to use MACs with SHA2 on OpenSSH ?

Environment

  • RedHat Enterprise Linux 6
  • Under openssh-5.3p1-84.1.el6

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