Khalil Ismayilov, Author at Plixer

Custom script-based sensor for PRTG

Today I would like to explain how to create a custom script that sends specific information to PRTG as a sensor. Customers often ask me how to use PRTG to tack the uptime and downtime of Scrutinizer. So, what specific parameter needs to be set up so that the PRTG sensor would react immediately on it?

Network Operations

Defining top talkers with Flexible NetFlow and AVC

12.16.20 - Khalil Ismayilov

I was recently on a call with a customer who wanted to know which applications use the most bandwidth during working hours—i.e. their top talkers. This gave me a great opportunity to review a specific feature of Flexible NetFlow and AVC integration. I’ve decided to build a small lab with a simple network configuration where I could set up a couple of VLANs, a trunk communication between L2 and L3 devices, and couple of devices. The end goal is to define what host under what VLAN is using what application the most.

Security Operations

How to detect a reverse SSH tunnel

09.28.20 - Khalil Ismayilov

Today we are going to talk about Plixer’s new Flow Analytics algorithm, Reverse SSH Shell, which has been included in the latest Plixer Scrutinizer update. The Reverse SSH Shell algorithm identifies possible reverse SSH tunnels to external destinations.

Configuration

Nexus 5600 NetFlow configuration

07.15.20 - Khalil Ismayilov

In this blog, we’ll cover the NetFlow configuration for Nexus 5600 switches. To configure NetFlow, ensure you have a VRF (virtual routing and forwarding) instance configured first, as it doesn’t work if applied under a VLAN interface or physical interface as a source when we configure the flow exporter.