diff --git a/vars/Ubuntu_18.yml b/vars/Ubuntu_18.yml
index 5a13638..c58bd6e 100644
--- a/vars/Ubuntu_18.yml
+++ b/vars/Ubuntu_18.yml
@@ -12,19 +12,14 @@ __sshd_defaults:
     - /etc/ssh/ssh_host_dsa_key
     - /etc/ssh/ssh_host_ecdsa_key
     - /etc/ssh/ssh_host_ed25519_key
-  UsePrivilegeSeparation: yes
-  KeyRegenerationInterval: 3600
-  ServerKeyBits: 1024
   SyslogFacility: AUTH
   LogLevel: INFO
   LoginGraceTime: 120
   PermitRootLogin: prohibit-password
   StrictModes: yes
-  RSAAuthentication: yes
   PubkeyAuthentication: yes
   AuthorizedKeysFile: "%h/.ssh/authorized_keys"
   IgnoreRhosts: yes
-  RhostsRSAAuthentication: no
   HostbasedAuthentication: no
   PermitEmptyPasswords: no
   ChallengeResponseAuthentication: no