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I disabled direct login of root by modifying /etc/ssh/sshd_config as follows:
This, however, disables direct root login for all authentication methods.Is there any parameter in the sshd_config file which I can change to allow direct login of root for only key-based authentication?
Specifies whether root can log in using ssh(1). The argument must be “yes”,
“without-password”, “forced-commands-only” or “no”. The default is “yes”.
If this option is set to “without-password” password authentication is disabled for
If this option is set to “forced-commands-only” root login with public key authenti‐
cation will be allowed, but only if the command option has been specified (which may
be useful for taking remote backups even if root login is normally not allowed).
All other authentication methods are disabled for root.
If this option is set to “no” root is not allowed to log in.