22 tcp - SSH

OpenSSH 2.3 < 7.7 - Username Enumeration

python openssh_username_enum.py --port 22 --userList ssh_list.txt --outputFile ssh_enum_results.txt 10.10.10.55

Nmap nse script

nmap -sV --script="ssh* and note brute" -p22 <target-ip> -oN ssh_script_scan.nmap