How to test connectivity with Netcat

Have you ever had trouble getting two Linux servers to talk to each other? Between application listeners, local firewalls, and network/routing contexts it’s tough to narrow down the scope of a connectivity problem. In this tutorial, we look at a simple way to rule out application listeners, test local firewalls, as well as traverse the routing infrastructure over specific ports.

Want to go more in-depth with about this topic? Check out Linux Academy's course on Linux Networking & Troubleshooting:

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[michaelchristian]

Hi and welcome, thanks for watching! If you have any feedback or questions, please drop them in the comments and we'll get back to you. I hope you enjoyed this quick tutorial on connection testing between Linux hosts.

[VishalRaoOnYouTube]

I love the 2 minute tutorials! Suggestion: do some videos on configuring route tables to improve security of multi-tiered apps.

[amjedjabari]

Thank you for making this great networking video, I will check the Networking course on LinuxAcademy.

[weedeater]

What is this voodoo where you are running commands on two machines at the same time, or choosing just one of them?

Never mind, I just found clusterssh in my repos and maybe some other similar apps.

Never seen that before, very cool.

Still interested in which application that is you are using.