[Freifunk] Upgrade Virtual Freifunk Router on VMWare ESXi 6.5

As I mentioned earlier, I use a virtual Freifunk Router as part of my mobile Infrastructure / Server. With this little VM, I can actually run a big-area Freifunk Network with lots of users without having to invest in new TP-Link accesspoints: I am running the VM, outputing the Freifunk LAN to a designated VLAN and use old spare Accesspoints as dumb "Media-Converters" (LAN to WIFI ;)).

But, as I only use this appliance every now and then for different kind of conventions and conferences, I need to upgrade that Appliance manually, to get it straight to the latest version without waiting or reinstalling (and droping the VPN key...).

Actually, that is quite simple in VMWare: Just go to the terminal of said VM and get started. Well. Ok, stop! Before you're doing that, just remember: You're on a VM. You got no excuse at all for not making a backup - so just shutdown your VM, make a snapshot, then turn it back on - and get started. Better safe than sorry ;)!

First, we're going to install wget with SSL support

opkg update
opkg install wget

Then we need to find the latest version of our Freifunk Firmware - as sysupgrade package. I used the gluon-fftr-0.8.4-x86-vmware.vmdk to install the VM, so I need an x86-generic-sysupgrade.img.gz :). I found that thing here: https://github.com/freifunktrier/firmware_store/tree/master/firmware/stable/sysupgrade . However, please bear in mind to use the image from YOUR Freifunk Provider ;). Try to download the image and get to the "RAW FILE" link on Github and use it to download the file to your VM:

cd /tmp
wget -O sysupgrade.img.gz  https://github.com/freifunktrier/firmware_store/blob/master/firmware/stable/sysupgrade/gluon-fftr-0.8.6+jenk_tackin-x86-generic-sysupgrade.img.gz?raw=true

After that, apply the upgrade and reboot:

sysupgrade -v /tmp/sysupgrade.img.gz
reboot

And thats it :)!

Thanks a lot again to Freifunk Trier for supporting my project :).

[Freifunk] Virtual Freifunk Router on VMWare ESXi 4.1

This post was planed a LONG TIME, however - due to the fact that I could not get it working back in 2015 (See: https://github.com/freifunk-gluon/gluon/issues/496) it had been delayed. However, as I have the need to get Freifunk working as VM on a central ESXi Server - I tried it again - and it worked! Basic instruction to get it working can be found here in german: https://www.it-kl.eu/2015/08/gluon-x86-unter-vmware/

I got following equipment: ESXi 4.1 Server with multiple NICs.
Start up with getting the right image from your Freifunk Team. I got the gluon-fftr-0.8.4-x86-vmware.vmdk from the Firmware Store of my trusted guys from FFTR (https://github.com/freifunktrier/firmware_store/tree/master/firmware/stable/factory [ Trier 0.8.4 is gluon 2016.1.6-3-g9300421, it's just 2016.1.6 + ee597c6 + Webinterface-color-patches ] )
After that, create a new VM on your VMWare ESXi Server. Choose an user definied configuration, "Other" OS and "Other (32-Bit)" Version. I gave the VM a 1 vCPU and 512 MB of RAM - but you can chose as you like. After that, you need to create two Network Devices / NICs. I chose two E1000 ones, and gave the first Interface the Freifunk LAN and added the second Interface to my common WAN (IMPORTANT!). After that, you're not going to create an HDD.
After the creation of the VM, upload your vmdk file to the folder, edit the VM and chose the downloaded VMDK as Harddrive.

On your ESXi Server, go to Configuration, Network and edit your vSwitch. Allow Promiscuous Mode, MAC Change and Fake Transmissions.

After that, go to Configuration, Software, Advanced Settings - to the "Net" section and change Net.ReversePathFwdCheckPromisc to 1 (thanks to FFS-Roland for helping out! :))

After that, you can start up your VM. You should get DHCP on your FFLAN Port - something like an 192.168.1.x address. Go to 192.168.1.1 via browser, give your Router a name, enable Mesh VPN (important!) and maybe change the bandwidth settings. Save and mail your VPN Key to your Freifunk Team. In some hours, you should be good to go (the Key added to their system - and after a quick reboot of your VM, you should be live :))

Thanks a lot to Draco and Ranlvor from Freifunk Trier for their tremendous help :)!

Raspberry Pi Con "Pi and More"

At the 23. of August 2012, the University of Trier held the first Raspberry Pi Convention in Germany. It was a little, but awesome gig with about 30 IT Students and other interested people.

The main idea was to rise the awareness for the new microcomputer, called "Raspberry Pi" which combines an 700 MHz ARM Processor, 512 MB of RAM, Full HDMI Output, Audio, Ethernet and USB into an very small and affordable package (about 35 US Dollar). With this microcomputer, and its General Purpose Input and Outputs (GPIO), pupils can actually have a "hands-on" (in) physical computing. That means: Connecting software (i.e. Python, Perl, C programs) with the real world. For example: Controlling LEDs, driving motors or even react on buttons, attached to the GPIO port. Combining these possibilities into a small and affordable package started a big hype about this little computer, long before it was even available to the public.

But now, about half a year after the release, multiple versions and even more Operating Systems started to appear. Even a special modified Debian version, called Raspbian is ready to download. There are special versions of Arch Linux, Fedora, XBMC (a Multimedia Entertainment Center) and even a special version of OpenWRT is under development. During this meeting, the participants had the opportunity to listen to speaks (an Intro to the RaspPi, a Speech about Cross compiling and the I2C Bus System) and workshops (driving an LED, building the so called "Ladder Game", getting a Nokia 3310 LCD Display to work as Output). The overall response was great as well as the conference itself and I would wish to have additional meetings in the future.

On this occasion I also want to thank the organization of the PiAndMore, especially the Fachschaft of the University of Trier and Daniel Fett. You made an awesome job. Please keep it up.

Additional pictures and infos can be found on my JCTixx Project Twitter Account @JCTixx

Official Stuff: Facebook Event (https://www.facebook.com/events/330497597037314/), Twitter Account (@PiAndMore), Google Site (https://sites.google.com/site/piandmore/)