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Network Diagnostics Guide

Introduction​

This guide is intended to walk you through the basics of some different network troubleshooting techniques.

Opening a Terminal​

A terminal is a text-based interface that allows you to interact with your computer using text commands. This can be useful for troubleshooting network issues.

Windows​

Open PowerShell by pressing Win + X, then selecting Windows PowerShell.

MacOS​

Open Terminal by pressing Cmd + Space, then typing Terminal, and pressing Enter.

Linux​

Open Terminal by pressing Ctrl + Alt + T.

Pinging​

Pinging is a network utility that can be used from any terminal to test the reachability of another device on the network. This can be used to make sure that your machines are accessible on the network.

ping <ip address>

Example​

If you machine's IP address is 192.168.1.101, you would type the following command:

ping 192.168.1.101

Nmap​

Nmap is a network scanning tool that can be used to discover devices on a network. This can be useful for identifying devices that are connected to your network.

Installation​

Windows​

To install Nmap on Windows, open PowerShell and type the following command:

winget install nmap

MacOS​

To install Nmap on MacOS, open Terminal and type the following command:

brew install nmap
tip

If you don't have Homebrew installed, you can install it by typing the following command:

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

Linux​

To install Nmap on Linux, open Terminal and type the following command:

sudo apt-get install nmap

Usage​

To scan your network for devices, open PowerShell and type the following command:

nmap -p 22 XXX.XXX.XXX.0/24

Examples​

If your computer's IP address is 192.168.1.18, and you want to search for devices with port 21 (FTP) open through the entire range of 192.168.1.1 through 192.168.1.255, you would type the following command:

nmap -p 21 192.168.1.0/24

Finding a Chatterbox​

If you're uncertain if your Chatterbox is connected to your network, you can use Nmap to scan your network for devices with port 22 open. The Chatterbox listens on port 22 by default.

Windows

nmap -p 22 192.168.1.0/24 | Select-String "chatterbox"

MacOS and Linux

nmap -p 22 192.168.1.0/24 | grep chatterbox

Finding a Fanuc Machine​

If you're uncertain if your Fanuc machine is connected to your network, you can use Nmap to scan your network for devices with port 8193 open. Fanuc machines listen for FOCAS (the Fanuc communication protocol) connections on port 8193 by default.

nmap -p 8193 192.168.1.0/24