What GRE Tunnels are and How to Configure it on Cisco Routers

  There are many technologies today you can use to connect your corporate locations via provider or internet network. Most often used WAN connections through provider network are L2VPN or L3VPN. If you use internet there is  IPsec site-to-site tunnel connection. There are pros and cons for both methods. While L2VPN or L3VPN connections are… Read More What GRE Tunnels are and How to Configure it on Cisco Routers

Remote Access SSL VPN Configuration on Cisco ASA Firewall Through CLI by Using Certificate/Username for Authentication and AnyConnect Client

In new age of remote access VPN we have TCP/SSL or TCP/TLS as preferable protocol over IPSec. As advantages of this VPN method over IPSec we can find its flexibility(it does not requires additional ports over 443 allowing through corporate firewalls), similar security strength as IPSec(asymmetric encryption key, strong encryption and authentication protocols etc.), reliability… Read More Remote Access SSL VPN Configuration on Cisco ASA Firewall Through CLI by Using Certificate/Username for Authentication and AnyConnect Client

How to Setup Environment for OpenDaylight Applications Development

Setting up environment with Java, Maven and Git In this article I will explain process of installation all prerequisites needed for start developing applications for OpenDaylight controller. When we have all prerequisites installed we can start with OpenDaylight application development. OS we will use is Ubuntu Desktop installed on VirtualBox virtualization platform. In my article… Read More How to Setup Environment for OpenDaylight Applications Development

Visualize Your Mininet Network at OpenDaylight SDN Controller

In one of my previous articles I described process of installation Mininet and OpenDaylight controller at VirtualBox virtualization platform. At this article I will show how to start simple network using Mininet, connect network to OpenDaylight controller and get your network topology visualized at OpenDaylight „topology“ tab. When you have your network from Mininet connected… Read More Visualize Your Mininet Network at OpenDaylight SDN Controller