If two lines are cut by a transversal and the alternate exterior angles are congruent, the lines are parallel. Interiors on Same Side Converse. If two lines are cut by a transversal and the interior angles on the same side of the transversal are supplementary, the lines are parallel.
The open port checker is a tool you can use to check your external IP address and detect open ports on your connection. This tool is useful for finding out if your port forwarding is setup correctly or if your server applications are being blocked by a firewall.
Ping is very specific but if you want to check whether a port is open or not, and are running a Windows box then PortQry is your friend. I've only used it for testing Domain Controllers for connectivity issues, but it worked a treat for that, so should work for you.share | improve this answer.orts belong to the transport layer protocols like TCP and UDP. However, you could use nmap to see whether ports are open or not. Edit: As flokra mentioned, nmap is more than just a ping-for-ports-thingy. It's the security auditers and hackers best friend and comes with tons of cool options.