In this lab, we’ll configure authentication when running EIGRP in named mode. While classic mode EIGRP offers only MD5 authentication, named mode EIGRP offers both MD5 and HMAC-SHA-256 authentication. HMAC-SHA-256 authentication is, of course, the more secure version. By the way, we can configure authentication between two routers with one Read More
Dynamic Multipoint Virtual Private Network (DMVPN) owes its popularity to two primary reasons: scalability and simplicity of configuration. In large organizations with lots of branches, configuring dozens of point-to-point VPN tunnels is an error-prone and cumbersome exercise. So Cisco introduced the DMVPN technology nearly two decades ago. DMVPN finds favor Read More
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 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 box, Layer 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