> I am not familiar with it, but you can work with protocol names like this: nmap 10.10.10.0/24 -p SMTP # never worked for me tho It could be that it’s looking

> I am not familiar with it, but you can work with protocol names like this: nmap 10.10.10.0/24 -p SMTP # never worked for me tho It could be that it’s looking that up from /etc/services. Services defined there are usually in lowercase.