Category: Networking
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Resolve Cisco SSH Key Exchange Issues – No Matching Exchange Method Found
Introduction In this post, we are going to go over how to get around an error I came across when trying to use Secure Shell (SSH) to access my Cisco C3560CX switch from my Fedora Workstation computer. Section I – What is SSH? Secure Shell is a way to control…
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Simple Netconf Security Configurations for Cisco Devices
Introduction In this post, we are going to go over some simple configuration you can implement on any Cisco networking device that have Netconf enabled. Section I – Why Bother? As part of Defence in Depth we should be thinking of how can we add layers to the security of…
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On Prem Cisco SSM CSLU Broken Licensing Workaround
Time to read: In this post, we are going to go over a simple solution I have had to implement to solve a problem with Cisco Smart License Utility (CSLU) within an on prem Cisco Smart Software Manager (SSM) instance. Section I – The Problem I have an on premise…
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How to Configure Wireguard VPN on Linux
Time to read: In this post we are going to go over how you can install a Wiregaurd Virtual Private Network (VPN) server on Linux and then how to create client configurations to allow clients (peers) to connect to the server. For reference I am using a Fedora 40 server…
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How to Analyse Proxmox Virtual Network Traffic – Proxmox OpenVSwitch Port Mirror Configuration
Time to read: In this post we are going to cover how to configure Proxmox to port mirror network traffic that can then be recieved by a network analysis tools. This took some digging through the internet for me to find a configuration that fit my requirements as best as…
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How to License Cisco Nexus in Virtual Lab For Free
Time to read: If you are using Cisco’s Nexus platform in your virtual labs you may run into the issue where you cannot enable any of the features. In my case I get an output of “Feature grace period is disabled”. In this post we are going to cover how…
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How to Install GNS3 Server VM on Proxmox 8
this article we are going to go over how to install the GNS3 VM (Virtual Machine) on a Proxmox 8 instance. This assumes that you already have your Proxmox server setup and ready to go. Additionally, I am assuming that you have a way to get files onto the Proxmox…
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Cisco – How Configure VRF-Lite
In this post, I am going to provide instructions for VRF-Lite configuration. This post contains a very basic configuration you need to get up and running with a VRF-Lite environment. There is not a lot of configuration required you just have to make sure that you carry out the configuration…
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What is VRF-Lite: How Virtual Routing and Forwarding Works
In this article, I am going to explain Virtual Routing and Forwarding. VRFs or Virtual Routing and Forwarding is a key technology used when wanting to route traffic over the same physical infrastructure without the traffic ever talking. This technology is used within provider1 networks to allow segregation of all…
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