David Davis

As VMware ESX is loaded directly on hardware and is its own virtualization operating system, there are a number of factors to consider when securing it. While, due to its design architecture, ESX is inherently secure, there are still a number of security factors to consider. In this article we will cover the vulnerability points…

There are many types of virtualization- server, network, storage, and more. In this article, we will demystify these complex terms, explain what they can do for you, and name specific products that provide these functions. So prepare for the smoke to be cleared… What is Server Virtualization? Out of all three of the different types…

So many network performance tools tell you that you have too much traffic here or there but then don’t go the next step and tell you what that traffic is and where its coming from. In the past to find out the answer to this, you would have to take a protocol analyzer, put it…

Tape backups have been around for a very, very long time. We’re used to them by now, and although they serve their main purpose they do have their limitations. Tape backups haven’t progressed with the rest of technology and we’re paying the price. For one, tapes just don’t have enough capacity. The best you can…

Just like any other server OS or application, VMware ESX Servers also need patches and updates periodically. Some users assume that ESX doesn’t require patching, however that is simply not true. While there may be better tools in the future, currently, esxupdate is the most popular tool used today. In this article, you will learn…

VMware Workstation, Server, and ESX Server can use virtual CD/DVD disks instead of having to insert physical disks. This saves tons of time and trouble. Even better, creating a shared ISO library and all of your Virtualization servers can share that installation media. Let’s find out how to mount these virtual CD/DVD drives in VMware….

If you are used to working with home networking gear you are used to an integrated device that “does it all”. On a home network, you may have one box that is a cable/DSL modem, router, firewall, switch, and wireless access point all in one. It is amazing all the functions they can fit into…

Recently, a fellow Cisco administrator told me about a tool he had used to reset a password on a router. He had forgotten the line vty password and the enable password. He could not log in to the router. He did, however, know the SNMP Read/Write password. Using a freeware tool dubbed “Cisco SNMP Tool”…

Preventing network loops with Spanning-Tree Protocol (STP) 802.1d Have you ever had a loop in your LAN?  You don’t want one and neither do your users.  A loop in your LAN can bring down the whole network.  You can avoid a loop by using Spanning Tree protocol (STP).  Let’s find out what Spanning Tree is,…

The ping command is irreplaceable when it comes to troubleshooting. At some point, you will undoubtedly use this command to solve a networking problem. But how do you properly use this command in the Cisco IOS? There is more to it than you might think. What Are The Basics of Ping? The ping command works…