ENE-NG and GNS3 – Speed and Duplex Mismatch
Duplex Mismatch KB ID 0000983 Problem I don’t know why this happens sometimes with GNS3, and EVE-NG but occasionally I will get a connection between two devices that constantly complains. %CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on {interface-name} (not half duplex), with {host-name} {interface-name} (half duplex). For the uninitiated, a speed/duplex mismatch, usually happens when both ends of the link are set...
CentOS TFTP Server (Install and Configure)
CentOS TFTP Server KB ID 0000998 Problem I needed to back up a Cisco firewall, and perform an upgrade remotely, despite my best efforts to use the ASDM and update via http, I had to go ‘old school’ and bring up a TFTP server on one of my CentOS Linux servers. Solution CentOS TFTP Server 1. Log onto the server and install the xinetd TFTP Server. Execute the following command and follow the on-screen prompts. Using username...
VMware – Cannot Cut, Copy, or Paste to VM’s
KB ID 0000515 Problem Ever since ESX 4.1 this feature has been disabled and you have been unable to paste to VM, VMware say in their own documentation: Source (Page 215 – ESX Configuration Guide ESX 4.1 vCenter Server 4.1). To turn this feature back ON you have a few choices. Please be aware: We are talking about copy and pasting TEXT to and from a guest VM NOT files and folders. Solution ESX Option 1 (Enable Copy and Paste to...
Microsoft Teams: Suppress Annoying Message Pop-ups
KB ID 0001722 Problem Wow! Who at Microsoft Teams thought that enabling that by default was a good idea? I was on a large conference call this morning, (about 150 people). Every message to the message feed was spewing onto my screen and making a noise during the meeting! Thought: Why do ALL developers think it’s a good idea to have pop-up banner massages appear top right of the screen, (where your windows control buttons and...
Windows Server: Disabling SSL 3.0, TLS 1.0, and TLS 1.1
KB ID 0001675 What are these protocols? Both SSL and TLS are cryptographic protocols designed to secure communications over a network (remember the internet is just a network). Originally we had SSL version 1 and version 2. But they were, (to be honest) ‘a bit bobbins’ and full of security holes, so never really took off. Version 3 however did and was widely supported. The problem with version 3 was, (again) that was also ‘bobbins’....