If you need to find any open SSH ports on your network, use the following command. Make sure you substitute 10.0.0.0/24 with whatever your home network is.
nmap -p 22 --open -sV 10.0.0.0/24
You can also scan for other ports by changing "-p 22" to whatever port you want to scan for. The following will look for port 80 which is used by web servers.
nmap -p 80 --open -sV 10.0.0.0/24
