Permitted authentication methods are indicated by theses keywords:
DSAAuthentication
PasswordAuthentication
RhostsAuthentication
RhostsRSAAuthentication
RSAAuthentication
HostKey and HostDSAKey identify files that hold host public keys when the default file name is not used. KeyRegenerationInterval defines how often the server key is regenerated.
Protocol specifies the version. Ciphers specifies the encryption algorithms for v2. ServerKeyBits defines the number of bits in the server's key.