d3d ^ is a freelance security researcher (among other things) that ❤ exploit development, bug hunting, and writing offensive security tools.

Setting up GNS3 on Arch Linux

1 min read

GNS3 is used by hundreds of thousands of network engineers worldwide to emulate, configure, test and troubleshoot virtual and real networks. It’s also a great tool for security researchers, so in this post, I am going to show the steps I used to setup the latest GNS3 network virtualization software on ArchLinux.

The first step is to make sure you have the following packages installed using pacman.

sudo pacman -S python-pip wget git
sudo pacman -S python-pyqt5 qt5-tools qt5-multimedia
sudo pacman -S gcc cmake libelf libpcap
sudo pacman -S bison flex git 

Next, you need to use python’s pip installer to setup a few python modules needed for GNS3.

sudo pip install --upgrade pip
sudo pip install -U tornado ws4py setuptools netifaces zmq dev
sudo pip install -U ws4py 
sudo pip install  pyqt5

Now that prerequisite packages have been installed, its time to install the GNS3 packages starting with the GNS3 GUI from github.

mkdir -p /tmp/gns3
cd /tmp/gns3
git clone https://github.com/GNS3/gns3-gui.git
cd gns3-gui
sudo python setup.py install 
cd ..

Once the GNS3 GUI was setup, you need to install the GNS3 Server as seen below.

git clone https://github.com/GNS3/gns3-server.git
cd gns3-server
sudo python setup.py install 
cd ..

In order to run the IOS images within the GNS3 Server, you need to have dynamips installed to emulate the Cisco devices.

git clone git://github.com/GNS3/dynamips.git
cd dynamips
mkdir build
cd build
cmake ..
make
sudo make install 
cd ../..

The ubridge package is needed for creating network connections between GNS3 and our physical or virtual network space.

git clone https://github.com/GNS3/ubridge.git
cd ubridge
make
sudo make install
cd ..

Next, to install the Virtual PCs (VPCS) packages to allow emulating of PCs on the virtual network.

git clone https://github.com/GNS3/vpcs.git
cd vpcs/src
sh mk.sh
cp vpcs /usr/local/bin/
chmod +x /usr/local/bin/vpcs
cd ../..

Last, but not least, you need to install the iniparser to help with Cisco IOU.

git clone http://github.com/ndevilla/iniparser.git
cd iniparser
make
sudo cp libiniparser.* /usr/lib/
sudo cp src/iniparser.h /usr/local/include
sudo cp src/dictionary.h /usr/local/include 
cd ..

Once all the above steps have been taken, you should now be able to start the GNS3 GUI by running the command gns3 at the command line.

d3d ^ is a freelance security researcher (among other things) that ❤ exploit development, bug hunting, and writing offensive security tools.

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