diff --git a/samba/templates/smb.conf.erb b/samba/templates/smb.conf.erb
index 8e60d5f..3b0b145 100644
--- a/samba/templates/smb.conf.erb
+++ b/samba/templates/smb.conf.erb
@@ -38,6 +38,8 @@ kerberos method = secrets and keytab
 <% else -%>
 <%   scope.function_fail(['Invalid value "%s" for auth.' % @auth]) -%>
 <% end -%>
+lanman auth = no
+ntlm auth = no
 
 # log per machine and rotate after 128MB
 log file = /var/log/samba/%m.log