> For the complete documentation index, see [llms.txt](https://docs.uniqpath.com/dmt/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.uniqpath.com/dmt/internet-connection-monitoring/core-idea.md).

# Core idea

### Problem

{% hint style="warning" %}
*"Internet is not working"* → How do we troubleshoot?
{% endhint %}

### The usual way

Reboot the router.

{% hint style="danger" %}
This wastes time and maybe it even wasn't the reason. If it was, you need a new router.
{% endhint %}

In any case it's good to have an instant indicator to get a feeling if there is a live connection to the outside. 

### Option 2

{% hint style="success" %}
First check if **PC → PS** link is down.
{% endhint %}

![](https://1275275286-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MNp0gEer3gy0HXEwLwr%2F-MP5rAxYdru-D7nP1ixT%2F-MP5rXAmgzmF92TEtWU2%2Fdmt_follow.png?alt=media\&token=21feca13-3202-4ef4-8130-b829981a0c8c)