Livebox (Inventel DV4210) Filesystem Dropbear Server
To add an SSH (Dropbear) Server, you need to do the following,
Copy Dropbear multi-call binary to /bin with permissions of 777.
Create symlink to dropbearmulti in /bin called dropbear with permissions of 777.
Create symlink to dropbearmulti in /bin called dropbearkey with permissions of 777.
Delete any files that exist in /etc_ro_fs
Copy Dropbear startup script to /etc_ro_fs/init.d with permissions of 777.
Create symlinks with relative paths (..\init.d\) to dropbear_server in /etc_ro_fs/rc0.d,
/etc_ro_fs/rc1.d and /etc_ro_fs/rc2.d called
with permissions of 777.
When the Livebox boots it will automatically start the dropbear (SSH) server.
The source for the dropbearmulti binary is available here.