sshd fails with "sshd: /etc/ssh/sshd_config line xx too long" seen in the logs

Solution In Progress - Updated -

Issue

  • Users are unable to ssh in to the server until it is rebooted, the errors seen in /var/log/messages are:
Feb 26 09:21:27 server systemd: sshd.service failed.
Feb 26 09:22:09 server systemd: sshd.service holdoff time over, scheduling restart.
Feb 26 09:22:09 server systemd: Starting OpenSSH server daemon...
Feb 26 09:22:09 server sshd: /etc/ssh/sshd_config line 49 too long
Feb 26 09:22:09 server systemd: sshd.service: main process exited, code=exited, status=255/n/a
Feb 26 09:22:09 server systemd: Failed to start OpenSSH server daemon.
Feb 26 09:22:09 server systemd: Unit sshd.service entered failed state.
Feb 26 09:22:09 server systemd: sshd.service failed.
Feb 26 09:22:52 server systemd: sshd.service holdoff time over, scheduling restart.
Feb 26 09:22:52 server systemd: Starting OpenSSH server daemon...
Feb 26 09:22:52 server sshd: /etc/ssh/sshd_config line 49 too long
Feb 26 09:22:52 server systemd: sshd.service: main process exited, code=exited, status=255/n/a
Feb 26 09:22:52 server systemd: Failed to start OpenSSH server daemon.
Feb 26 09:22:52 server systemd: Unit sshd.service entered failed state.

Environment

  • Red Hat Enterprise Linux 7.x

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