How to Identify high number of active connections to a proxy

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Issue/Introduction

Overview:

This article provides information on the active connections to a proxy and will help to identify where the majority of them are coming from.

 

Issue: 

Observing a surge in the number of active connections to a proxy.

 

Cause:  

There can be a possibility that a single host might have established multiple TCP connections to the same destination port (with different source ports).

 

Troubleshooting steps:

~proxy.listeners.connections.active metric tracks the number of currently active connections

 

 

If you want to identify from where these connections are coming from then you can run the below command,

netstat -anp --tcp

 

Example output:

Windows:

 

Linux:

 

Also, you can see how many connections telegraf is making by running the below command in the source machine where you installed telegraf ,

lsof -p $(pgrep telegraf)

 

Example output :

Linux: