Simulating bad network conditions on Linux

Sometimes, your network is just too good.

Today I ran into this issue as I was testing an application running off a VM in the local network. Latency and bandwidth were excellent, as you’d expect, but nowhere near the conditions you’d encounter over the internet. Testing in these conditions is unrealistic and can lead to underestimating issues your users will experience with your app once it’s deployed.

So let’s change that and add artificial latency, bandwidth limitations, and even drop a few packets, using tc.

Just put the following script in /etc/init.d, modify the values to fit your needs, make it executable, and run /etc/init.d/ start to degrade performance accordingly.

I originally found the script on top web hosts’ website, and added a few things. Props!

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