TCP port 80 (http service): LISTENING If the web server returns an HTTP response, you might also see:

PortQry (and its successor, PortQryUI) reports not only if a port is listening, but also which service is behind it. PortQry is a command-line utility that queries a target computer’s TCP and UDP ports. Unlike a basic ping or telnet, PortQry attempts to follow the application protocol (like HTTP, DNS, or NetBIOS) to confirm a service is truly responsive.

portqry -n dc01 -p tcp -o ldap Other built-in service names: netbios , smtp , http , rpc , sql . This is a PortQry superpower: