4.5.5. dropbear

dropbear which is running on port 222 is a lightweight SSH server.

To retrieve the version with nmap, use the command mentioned below:

$ nmap -sV -p 222 --script=banner 10.0.0.65
[...]
Host is up (0.00045s latency).
PORT    STATE SERVICE VERSION
222/tcp open  ssh     Dropbear sshd 2012.55 (protocol 2.0)
|_banner: SSH-2.0-dropbear_2012.55
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel

Banner grabbing with netcat will give you the version back.:

$ nc -v 10.0.0.65 222
Ncat: Version 6.25 ( http://nmap.org/ncat )
Ncat: Connected to 10.0.0.65:222.
SSH-2.0-dropbear_2012.55