![]() You can replace the shell with a command of your choice using the CMD directive, which causes the container to start with that command/utility running immediately on boot. There are plenty of other uses for NMAP, but this was just a simple test, to prove that it was functional: NMAP checks the target device, to see which SSH key exchange algorithms it supports. GNS3 supports both an Ubuntu Docker container and QEMU VM. You can now easily run Ubuntu appliances in your GNS3 topologies. Prior to the following screenshot, the nmap container was assigned a static IP address, and connected to a router that had been preconfigured to allow SSH access to it.Ī quick test was run using the nmap -script ssh2-enum-algos target_ip command. GNS3 now supports a graphical QEMU Linux Ubuntu appliance. Since it already exists in the GNS3 VM, there’s no need for the “docker pull” step that would occur, if we were going to use a container from Docker Hub. This “nmap” container will be listed in the End Devices toolbar. Back at the main Preferences screen, click OK to exit it. We won’t be specifying any environmental variables this time, as the defaults are fine for this example, so click Finish to complete this configuration process. We’ll leave the console type set to telnet (we don’t need to use VNC/HTTP/HTTPS for this example), so click Next> to continue: We aren’t going to specify a start command this time, so click Next> to continue: As this example is just acting like a simple linux host, we can stick with default of 1 interface, so click Next> to continue: Specify the number of adapters you want this container to use. Give the container a name, and click Next>: Click Edit->Preferences->Docker Containers->New, like before, but instead of specifying a “New Image”, you’ll select “Existing image”, and then pick the one you just created from the dropdown list, and click Next> to continue: (the build time will vary, based on what you’re adding to the container, plus your PC) If the build was successful, you should see a message indicating that at the end of the output. Docker will cache each step of the build process.
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