VMWare ESXi 3.x is a free version and lightweight version of the VMWares ESX platform. It supports most of the key features that ESX has but comes in appliance like package which doesn’t let you configure anything more than just…
If you are having issues routing your traffic within the inside interface, or hair-pining your traffic, chances are you need to enable the “same-security-traffic permit intra-interface” command. Take a look at the picture below which explains this problem: Basically when…
A lot needs to be considered when planning for a datacenter. Power, cooling, UPS, generators, rack space, cost. All these come into play. Here are a few links to some vendor calculators I came across that has helped me. DELL…
Have you ever wondered how to query the architecture (32bit or 64bit) or rpm version that is installed on your Linux system? Has a DBA ever come to you and asked the following: “Why is my Oracle Linux server missing…
iSCSI or internet SCSI is a standard for running SCSI over an ip based network. For people familiar with this technology it basically enables you to mount remote disks over your existing IP infrastructure. Today I setup a simple iSCSI…
Today I setup vsftp for local user ftp access. I turned on ‘chroot_local_user=YES’ which essentially puts the ftp user into a vsftp chroot jail. But what happens when you want to access something outside of user’s home directory? What? Symlinks…
VMware – The leading industry Virtualization Provider. It comes in two flavors VMWare ESX and VMWare Server (formerly GSX). The former comes at a cost and the latter FREE! In a low cost setup Vmware server (Free version) is the…
After analyzing the situation I have identified several key problems. 1. System Availability – Systems fail frequently due to hardware failures, DoS, and application failures. 2. Collocation is far and administration requires frequent visits 3. Mini tower servers consume space…
Any startup entrepreneurial hosting business usually run into many technical challenges. They face difficult business decisions and often have to trade off between stability, scalability and underlying profit. There is no win/win situation, however I do know one thing –…
Today I was assigned a task to find out and explain a certain network anomaly we are experiencing in our network. The mission started out to be a bandwidth monitoring task against a specific router. This router however was owned…