Wireshark with Vagrant point-to-point (UDP tunnel) links

Vagrant supports three types of networks: public, private, and port-forwarding. The private network type has the option to use a UDP tunnel for a point-to-point link when using the vagrant-libvirt plugin. This connection type is ideal for links between virtual network devices. Refer to the following resources if you need more information: Pseudo-wires With Vagrant and Libvirt vagrant-libvirt Networks Vagrant Private Networks The only drawback with this type of connection is concerning packet sniffing....

February 12, 2020 · 3 min

SSH local port forwarding with remote GNS3 server

After opening the GNS3 client and starting nodes, we primarily access the remote virtual devices with a console connection. This console connection is either Telnet, VNC, or SPICE. A console connection covers our requirement for physical access to the virtual devices, but today most administrative tasks are carried out with a link to the network management interface . I define the GNS3 server as remote if the gns3server process is not running on the host operating system....

June 24, 2019 · 17 min

Compile and install Wireshark on Fedora and Ubuntu Linux

Wireshark is the world’s most popular network analyzer. A network protocol analyzer is usually required to get the deepest visibility in determining network issues. Grabbing the newest Wireshark release for Windows and Mac OS X is easy enough. You just direct your web browser to the Wireshark site to grab it. Things can be a little trickier if using Linux. The Wireshark package listed with most Linux distribution repositories is usually a version or two behind the current stable release....

May 13, 2011 · 4 min

Convert AC3 audio to MP3 for XviD files with FFmpeg

I recently had an issue where I wanted to play a movie on one of my portable devices, but the file’s audio stream is encoded in the AC3 (Dolby Digital) format. But of course, the device doesn’t support AC3, so I need to convert it to a compatible format. Handbrake is my go-to tool for media file conversion, but it no longer supports output to XviD – specifically the AVI container....

June 12, 2010 · 3 min

Install/Upgrade VMware Tools on Ubuntu Server

I routinely google this task whenever I have to install or upgrade the VMware Tools on a Linux VM guest. I figure I would make a post for future reference. Ingredients used for this post: VMware ESX Server 4.0 Ubuntu Server 9.10 Steps Use the vSphere Client to connect to a vCenter Server or directly to an ESX host. Right-click the virtual machine and select Open Console. Log into Ubuntu with an administrative account....

January 5, 2010 · 1 min

Ubuntu TFTP

This post is a guide on how to create a TFTP server for Cisco device configuration backups on Ubuntu 8.10. 1. Install atftpd. sudo apt-get install atftpd 2. Configure atftpd as a separate server and modify the tftpboot location. Modify the file with a text editor. sudo vim /etc/default/atftpd Set the configuration. USE_INETD=true -> USE_INETD=false /var/lib/tftpboot -> /srv/tftpboot Save and exit. 3. Initialize the new configuration. sudo invoke-rc.d atftpd start 4....

November 21, 2009 · 1 min