==== Configuration du server SSH ====

==== SSH PROTOCOL OVERVIEW ====


PROTOCOL NEGO
* protocol identitifcation

KEY EXCHANGE NEGO
* key exchange algorithm negotiation 
* key exchange --> creation symmetric_key

AUTH
* Server auth
* Client auth

CIPHER NEGO
* MAC, Message Authentication Code (Cipher + Hash ) --> negotiation symetric_alg

SSH TUNNEL
* Tunnel = symetric_alg ( symmetric_key ) +MAC