Networking

Windows: Continuously monitor network connections

You sometimes want to check if a program that you've installed is doing anything funky. While you could install a full-blown packet analyser like WIreshark, sometimes, that is overkill. A quicker and handier option would be to just rely on good old netstat. Like so:

netstat -bn 10

as well as

netstat -bf 10

-b: displays the program name (executable)

-n: displays the IP address

-f: displays the resolved form of the IP address

10: indicates that the command should be repeated after 10 seconds

Tags

Switch between default gateways to switch ISPs

So I have a couple of routers connected to my network each linking to a different ISP. When an ISP goes down, I want to easily switch ISPs from the command line and these are the couple of lines I use to do so:


#!/bin/bash

sudo ip route del default

if [ $1 == 'isp1' ]
then
echo "Switching ISP to $1"
sudo ip route add default via 192.168.1.1
else
echo "Switch ISP to ISP2"
sudo ip route add default via 192.168.0.1
fi

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KDE network manager disabled

One of my laptops which is running on Kubuntu Lucid decided to stop connecting to my network today. I found that the KDE network-manager applet (or is it a plasmoid? :S) had decided to disable itself. Clicking it stated so with no option to re-enable it (nice UI, boys). Getting to the commandline and starting the network-manager service did not help. I also found that accessing the System settings networking configuration gave me corrupt XML file errors.

Tags

Networking

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