I recently ran into a bizarre issue with users not being able to launch applications from a very old Citrix Presentation Server 4.0 farm when trying to launch from Citrix Web Interface 5.4. They were getting the eminently unhelpful, “An error occurred while making the requested connection.” The Diagnosis In the web …

One of the biggest scams of the Internet is in full swing right now. You may have heard of it. It’s called “net neutrality.” Fundamentally, net neutrality is about preventing Internet service providers (ISPs) from throttling or blocking traffic or providing paid prioritization of certain content. In addition, specific …

In this demonstration, we’re going to configure a basic OpenStack cluster on RedHat/CentOS 6.5.

If you’re familiar with networking you know that when a device is directly connected to two separate IP networks, traffic destined for one of those networks should egress on the interface that is directly connected to that network. For example, if your storage appliance is directly connected to the 172.16.1.0/24 …

If you are running XenServer 5.6 FP1 or later, there is a little trick you can use to improve network throughput on the host. By default, XenServer uses the netback process to process network traffic, and each host is limited to four instances of netback, with one instance running on each of dom0’s vCPUs. When a VM …