Wireshark · Go Deep. Common Open Research Emulator (CORE) | Networks and Communication Systems Branch. The Common Open Research Emulator (CORE) is a tool for emulating networks on one or more machines. You can connect these emulated networks to live networks. CORE consists of a GUI for drawing topologies of lightweight virtual machines, and Python modules for scripting network emulation. CORE has been developed by a Network Technology research group that is part of the Boeing Research and Technology division. The Naval Research Laboratory is supporting further development of this open source project. Key Features Network lab in a box Efficient and scalable Easy-to-use GUI canvas Centralized configuration and control Runs applications and protocols without modifying them Real-time connection to live networks Hardware-in-the-loop Distributed with multiple COREs Highly customizable CORE Demonstrations Click on a topic below for a short demonstration.
CORE Documentation The CORE Manual (PDF, HTML) covers installation, usage, and more. CORE Downloads Comments and Questions Additional Links. Graphical Network Simulator - GNS3. Technical Documentation - Support - Juniper Networks. Linux Home Networking | Tutorials and Forums. SSH Tunneling Explained | Source Open. Recently I wanted to set up a remote desktop sharing session from home pc to my laptop. While going through the set up guide I came across ssh tunneling. Even though there are many articles on the subject still it took me a considerable amount of googling, some experimenting and couple of Wireshark sessions to grasp what’s going under the hood.
Most of the guides were incomplete in terms of explaining the concept which left me desiring for a good article on the subject with some explanatory illustrations. So I decided to write it my self. So here goes… Introduction A SSH tunnel consists of an encrypted tunnel created through a SSH protocol connection. To set up a SSH tunnel a given port of one machine needs to be forwarded (of which I am going to talk about in a little while) to a port in the other machine which will be the other end of the tunnel. Port Forwarding SSH tunnels can be created in several ways using different kinds of port forwarding mechanisms.
Dynamic Port Forwarding.