README updated

README.md

@@ -1,17 +1,28 @@
 ssh-hardening
 =========
 
-SSH hardening, based on https://www.sshaudit.com & more
+SSH server hardening, based on https://www.sshaudit.com & more
 
 Requirements
 ------------
 
-- tbd
+- OpenSSH versions 6.5+
 
 Role Variables
 --------------
 
-- tbd
+Defaults:
+- `ssh_hardening_hostkeys`: `rsa`, `ed25519`
+- `ssh_hardening_hostkeys_all`: `dsa`, `ecdsa`, `rsa`, `ed25519`
+- `ssh_hardening_moduli`: `/etc/ssh/moduli`
+- `ssh_hardening_moduli_backup`: `/etc/ssh/moduli.not-hardened`
+- `ssh_hardening_sshd_config`: `/etc/ssh/sshd_config`
+
+Included via `vars/ssh_*`:
+- `ssh_hardening_opts`: Parameter/Values to set for specific SSH version
+
+Command line variables (undefined):
+- `ssh_hardening_force`: version/id to include, overwrites detected version!
 
 Dependencies
 ------------