This article, List open ports and listening services, originally appeared on TechRepublic.com. One of the biggest headaches for network administrators is open ports on devices. Unless you manually ...

Netcat lets you read from and write to network connections using TCP or UDP, enabling simple tasks like checking if a specific port on a computer is open and reachable (port scanning), transferring ...

If you're looking for a way to discover which ports are standing wide open on network machines, read about a powerful cross-platform solution that will do the trick. Editor’s note on June 4, 2015: ...