Let’s configure a VTI site-to-site Virtual Private Network in this lab. In this VPN lab, we’re running IPSEC as the native protocol on the tunnel interface. We’re not using Generic Routing Encapsulation (GRE) in this VPN lab. The lab will also demonstrate use of a dynamic routing protocol (EIGRP) between Read More
Not all Virtual Private Networks (VPNs) are created equal. There are so many flavors of VPNs to boggle the imagination. Purists insist that, strictly speaking, a VPN is not even required to have encryption. Of course, the same purists would concede that IPsec is a must have add-on for a Read More
Before jumping into the differences between IPv4 and IPv6 addresses, let’s first consider what an IP (Internet Protocol) address is. An IP address (either IPv4 or IPv6) uniquely identifies a host or device on a network, and can be a source or destination address. Your computer, mobile phone, router, Roku Read More
Understanding the basics of virtualization is a good skill to possess in an age when it seems like everything is going virtual or to the cloud. While Virtualbox may cut it for hobbyists, VMware is the numero uno vendor when it comes to virtualization. If you ask me, VMware is Read More
One of the nice features of Red Hat Enterprise Linux 9 (RHEL 9) OS is the ability to check, research and install only security updates from the command line. As a systems administrator, there’s always a risk that installing an update might break something important in the enterprise and lead Read More
Red Hat Enterprise Linux 9 (RHEL 9) is the latest iteration of the solid Linux OS that powers thousands of Linux servers and workstations at a gazillion companies and organizations worldwide. So how to quickly verify if the version of Red Hat Enterprise Linux OS you’re running is the latest Read More