-MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-512
-
-# Use privilege separation for increased security. "sandbox" applies
-# additional restrictions on the unprivileged process.
-UsePrivilegeSeparation sandbox
+MACs hmac-sha2-512-etm@openssh.com
+HostKeyAlgorithms rsa-sha2-512
+PubkeyAcceptedKeyTypes -ssh-rsa,ssh-rsa-cert-v01@openssh.com,ssh-dss,ssh-dss-cert-v01@openssh.com