SSH Protocol error waiting for channel open confirmation

Solution Verified - Updated -

Issue

  • When logging into a RHEL server from a client, we see "Protocol error waiting for channel open confirmation."
  • After upgrading openssh-server on a RHEL host, we are no longer able to log in from older clients.

Environment

  • Red Hat Enterprise Linux 7
  • openssh-7.4p1-11.el7

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