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Troubleshooting network connectivity issues

So you have just found out that you no longer have access to your VPS. Let's find out what is causing the issue. We will be using ping.pe for our troubleshooting.

Normal output

Here is what a normal output of ping.pe looks like:



The above output shows that the VPS is accessible from all parts of the world. If you are seeing this output however you are still unable to connect to your VPS, then most likely there is a software configuration issue which you can solve by using the Interactive Console in KiwiVM.

No connectivity at all, complete blackout

The output below shows 100% packet loss from all locations, meaning your VPS is completely inaccessible:



First of all, use KiwiVM to verify that your VPS is actually running.

Next step, verify your firewall configuration. The following article explains how to do that:

https://bandwagonhost.com/knowledgebase.php?action=displayarticle&id=24

If there are no issues with firewall, then most likely there is an issue with the network configuration inside of your VPS. The easiest way to solve these issues would be to perform an OS reinstall. You can also use the Interactive Console in KiwiVM to troubleshoot such issues, however specific steps fall beyond the scope of this article.

Slow connectivity, packet loss

Here's what packet loss looks like:



In this particular example we can see that there is heavy packet loss to 8.8.8.8 from all China locations (except one). To further diagnose the issue open up the full mtr report:



From this report it is clear that the issue is within China. If in doubt, we recommend performing mtr on the return path (in opposite direction - from the affected IP back to your home IP). Due to path asymmetry you may find a bit different output which may clarify the issue.