using PubkeyAcceptedKeyTypes in sshd_config breaks ssh connect from RHEL7

Solution Verified - Updated -

Issue

  • ssh should work between RHEL7 and RHEL8 even with PubkeyAcceptedKeyTypes defined. It should be possible to limit the Accepter Keytypes.
  • After limiting PubkeyAcceptedKeyTypes for hardening to below same setting works without problem with RHEL7.
PubkeyAcceptedKeyTypes ssh-ed25519,ssh-rsa,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com

Environment

  • Red Hat Enterprise Linux (RHEL) 7
  • Red Hat Enterprise Linux (RHEL) 8
  • ssh

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