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Cette fois ci, je vous présente mon bureau... sous Linux. Cette charmante femme, Monica Bellucci, m'accompagne durant mes sessions de programmation C ou Java, ou lorsque j'écris un nouveau article pour les Blogs (Infoplusplus, IF-FST ou mon Blog à moi) et pendant les séances d'écoute de Heavy Metal qui durent de 2 à 3 heures chaque jour. Ce qui m'impressionne vraiment sur Linux, c'est le nombre incontournable d'utilitaires qui en résident. Cette fois, j'ai écris cet article avec l'éditeur Nano, qui est un clone de Pico, le célèbre éditeur de l'université de Washington. En comptant jEdit, Vi, Emacs, Gedit, Kate et Kwrite, je peux toujours écrire et programmer sans ennui.

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GNS3 on Manjaro/Arch Linux: How to create virbr0 for NAT to work

Problem: You can't add a NAT connection to your GNS3 simulation, and you get the error : "ERROR template_manager:226 Error while creating node from template: NAT interface virbr0 is missing, please install libvirt" Steps to resolve: 1- Create a file named /tmp/default.xml 2- Paste this content and save: <network>   <name>default</name>   <bridge name="virbr0"/>   <forward mode="nat"/>   <ip address="192.168.123.1" netmask="255.255.255.0">     <dhcp>       <range start="192.168.123.2" end="192.168.123.254"/>     </dhcp>   </ip> </network> 3- Execute the following commands in your shell : virsh net-define /tmp/default.xml sudo virsh net-start default sudo virsh net-autostart default  
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GNS3: Simulating a 100% opensource site2site VPN using Wireguard, VyOS and OpenVSwitch

 This is something I had in mind but didn't find the time to accomplish before. It just took a very cold day to convince me that I have to play with Wireguard on VyOS. I used GNS3 of course, on my personal Linux laptop to create this setup. Of course the performance was not that great since it is just a simulation.  In real life, I am using Wireguard on a 10 years old Raspberry Pi Model B and amazingly with just a 700MHz single core ARM CPU and less than 512 MB of RAM I had a decent and stable permanent Wireguard tunnel. (My bandwidth would reach 24 Mbps without issue) Back to my simulation, this is what it looks like : Quick explanation: the VYOS routers labeled IPERF1 and IPERF2 are only used for an iperf3 test, which was able to reach about 50 to 60 Mbps each time. It ain't much but it was honest (and free) secure bandwidth! I won't get into the details of this setup but I will just post the two most important configurations : R-East and R-West : #### VYOS WireGuard Site...
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GNS3 vs VM: iperf3 test for VyOS

 In my last post I tried to simulate a site2site VPN connection using Wireguard via VyOS, my favourite router. It was very easy to implement but the performance was not that great on GNS3. It was not a VyOS issue at all, GNS3 is just a simulation tool and we can't expect real world performance in it, even if it uses Qemu and Linux virtual networking for that end. To prove that, I made the following simple iperf3 test using 3 VyOS routers on GNS3 : No VPN, just simple routing via connected routes through VyOS1.3-3. The result was similar to my Wireguard throughput test, of course considering the header size of Wireguard packets : In my Wireguard test, I reached a bitrate of 53.8 Mbps, which is almost 76% of total bandwidth, and it's a good result, but I had to verify if VyOS is able to route at a greater bitrate. For just that, I created a VyOS VM on VirtualBox and connected two other VyOS VMs to it's interfaces, and made an iperf3 test. The result was clearly better : Reach...
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