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14 <a href=
"http://people.skolelinux.org/pere/blog/">Petter Reinholdtsen
</a>
21 <h3>Entries tagged "freedombox".
</h3>
25 <a href=
"http://people.skolelinux.org/pere/blog/A_Raspberry_Pi_based_batman_adv_Mesh_network_node.html">A Raspberry Pi based batman-adv Mesh network node
</a>
31 <p>The last few days I have been experimenting with
32 <a href=
"http://www.open-mesh.org/projects/batman-adv/wiki">the
33 batman-adv mech technology
</a>. I want to gain some experience to see
34 if it will fit
<a href=
"https://wiki.debian.org/FreedomBox">the
35 Freedombox project
</a>, and together with my neighbors try to build a
36 mesh network around the park where I live. Batman-adv is a layer
2
37 mesh system ("ethernet" in other words), where the mesh network appear
38 as if all the mesh clients are connected to the same switch.
</p>
40 <p>My hardware of choice was the Linksys WRT54GL routers I had lying
41 around, but I've been unable to get them working with batman-adv. So
42 instead, I started playing with a
43 <a href=
"http://www.raspberrypi.org/">Raspberry Pi
</a>, and tried to
44 get it working as a mesh node. My idea is to use it to create a mesh
45 node which function as a switch port, where everything connected to
46 the Raspberry Pi ethernet plug is connected (bridged) to the mesh
47 network. This allow me to hook a wifi base station like the Linksys
48 WRT54GL to the mesh by plugging it into a Raspberry Pi, and allow
49 non-mesh clients to hook up to the mesh. This in turn is useful for
50 Android phones using
<a href=
"http://servalproject.org/">the Serval
51 Project
</a> voip client, allowing every one around the playground to
52 phone and message each other for free. The reason is that Android
53 phones do not see ad-hoc wifi networks (they are filtered away from
54 the GUI view), and can not join the mesh without being rooted. But if
55 they are connected using a normal wifi base station, they can talk to
56 every client on the local network.
</p>
58 <p>To get this working, I've created a debian package
59 <a href=
"https://github.com/petterreinholdtsen/meshfx-node">meshfx-node
</a>
61 <a href=
"https://github.com/petterreinholdtsen/meshfx-node/blob/master/build-rpi-mesh-node">build-rpi-mesh-node
</a>
62 to create the Raspberry Pi boot image. I'm using Debian Jessie (and
63 not Raspbian), to get more control over the packages available.
64 Unfortunately a huge binary blob need to be inserted into the boot
65 image to get it booting, but I'll ignore that for now. Also, as
66 Debian lack support for the CPU features available in the Raspberry
67 Pi, the system do not use the hardware floating point unit. I hope
68 the routing performance isn't affected by the lack of hardware FPU
71 <p>To create an image, run the following with a sudo enabled user
72 after inserting the target SD card into the build machine:
</p>
75 % wget -O build-rpi-mesh-node \
76 https://raw.github.com/petterreinholdtsen/meshfx-node/master/build-rpi-mesh-node
77 % sudo bash -x ./build-rpi-mesh-node
> build.log
2>&
1
78 % dd if=/root/rpi/rpi_basic_jessie_$(date +%Y%m%d).img of=/dev/mmcblk0 bs=
1M
82 <p>Booting with the resulting SD card on a Raspberry PI with a USB
83 wifi card inserted should give you a mesh node. At least it does for
84 me with a the wifi card I am using. The default mesh settings are the
85 ones used by the Oslo mesh project at Hackeriet, as I mentioned in
86 <a href=
"http://people.skolelinux.org/pere/blog/Oslo_community_mesh_network___with_NUUG_and_Hackeriet_at_Hausmania.html">an
87 earlier blog post about this mesh testing
</a>.
</p>
89 <p>The mesh node was not horribly expensive either. I bought
90 everything over the counter in shops nearby. If I had ordered online
91 from the lowest bidder, the price should be significantly lower:
</p>
95 <tr><th>Supplier
</th><th>Model
</th><th>NOK
</th></tr>
96 <tr><td>Teknikkmagasinet
</td><td>Raspberry Pi model B
</td><td>349.90</td></tr>
97 <tr><td>Teknikkmagasinet
</td><td>Raspberry Pi type B case
</td><td>99.90</td></tr>
98 <tr><td>Lefdal
</td><td>Jensen Air:Link
25150</td><td>295.-
</td></tr>
99 <tr><td>Clas Ohlson
</td><td>Kingston
16 GB SD card
</td><td>199.-
</td></tr>
100 <tr><td>Total cost
</td><td></td><td>943.80</td></tr>
104 <p>Now my mesh network at home consist of one laptop in the basement
105 connected to my production network, one Raspberry Pi node on the
1th
106 floor that can be seen by my neighbor across the park, and one
107 play-node I use to develop the image building script. And some times
108 I hook up work horse laptop to the mesh to test it. I look forward to
109 figuring out what kind of latency the batman-adv setup will give, and
110 how much packet loss we will experience around the park. :)
</p>
116 Tags:
<a href=
"http://people.skolelinux.org/pere/blog/tags/english">english
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/nuug">nuug
</a>.
121 <div class=
"padding"></div>
125 <a href=
"http://people.skolelinux.org/pere/blog/Oslo_community_mesh_network___with_NUUG_and_Hackeriet_at_Hausmania.html">Oslo community mesh network - with NUUG and Hackeriet at Hausmania
</a>
131 <p>Wireless mesh networks are self organising and self healing
132 networks that can be used to connect computers across small and large
133 areas, depending on the radio technology used. Normal wifi equipment
134 can be used to create home made radio networks, and there are several
135 successful examples like
136 <a href=
"http://www.freifunk.net/">Freifunk
</a> and
137 <a href=
"http://www.awmn.net/">Athens Wireless Metropolitan Network
</a>
139 <a href=
"http://en.wikipedia.org/wiki/List_of_wireless_community_networks_by_region#Greece">wikipedia
140 for a large list
</a>) around the globe. To give you an idea how it
141 work, check out the nice overview of the Kiel Freifunk community which
142 can be seen from their
143 <a href=
"http://freifunk.in-kiel.de/ffmap/nodes.html">dynamically
144 updated node graph and map
</a>, where one can see how the mesh nodes
145 automatically handle routing and recover from nodes disappearing.
146 There is also a small community mesh network group in Oslo, Norway,
147 and that is the main topic of this blog post.
</p>
149 <p>I've wanted to check out mesh networks for a while now, and hoped
150 to do it as part of my involvement with the
<a
151 href=
"http://www.nuug.no/">NUUG member organisation
</a> community, and
152 my recent involvement in
153 <a href=
"https://wiki.debian.org/FreedomBox">the Freedombox project
</a>
154 finally lead me to give mesh networks some priority, as I suspect a
155 Freedombox should use mesh networks to connect neighbours and family
156 when possible, given that most communication between people are
157 between those nearby (as shown for example by research on Facebook
158 communication patterns). It also allow people to communicate without
159 any central hub to tap into for those that want to listen in on the
160 private communication of citizens, which have become more and more
161 important over the years.
</p>
163 <p>So far I have only been able to find one group of people in Oslo
164 working on community mesh networks, over at the hack space
165 <a href=
"http://hackeriet.no/">Hackeriet
</a> at Husmania. They seem to
166 have started with some Freifunk based effort using OLSR, called
167 <a href=
"http://oslo.freifunk.net/index.php?title=Main_Page">the Oslo
168 Freifunk project
</a>, but that effort is now dead and the people
169 behind it have moved on to a batman-adv based system called
170 <a href=
"http://meshfx.org/trac">meshfx
</a>. Unfortunately the wiki
171 site for the Oslo Freifunk project is no longer possible to update to
172 reflect this fact, so the old project page can't be updated to point to
173 the new project. A while back, the people at Hackeriet invited people
174 from the Freifunk community to Oslo to talk about mesh networks. I
175 came across this video where Hans Jørgen Lysglimt interview the
176 speakers about this talk (from
177 <a href=
"https://www.youtube.com/watch?v=N2Kd7CLkhSY">youtube
</a>):
</p>
179 <p><iframe width=
"420" height=
"315" src=
"https://www.youtube.com/embed/N2Kd7CLkhSY" frameborder=
"0" allowfullscreen
></iframe></p>
181 <p>I mentioned OLSR and batman-adv, which are mesh routing protocols.
182 There are heaps of different protocols, and I am still struggling to
183 figure out which one would be "best" for some definitions of best, but
184 given that the community mesh group in Oslo is so small, I believe it
185 is best to hook up with the existing one instead of trying to create a
186 completely different setup, and thus I have decided to focus on
187 batman-adv for now. It sure help me to know that the very cool
188 <a href=
"http://www.servalproject.org/">Serval project in Australia
</a>
189 is using batman-adv as their meshing technology when it create a self
190 organizing and self healing telephony system for disaster areas and
191 less industrialized communities. Check out this cool video presenting
193 <a href=
"https://www.youtube.com/watch?v=30qNfzJCQOA">youtube
</a>):
</p>
195 <p><iframe width=
"560" height=
"315" src=
"https://www.youtube.com/embed/30qNfzJCQOA" frameborder=
"0" allowfullscreen
></iframe></p>
197 <p>According to the wikipedia page on
198 <a href=
"http://en.wikipedia.org/wiki/Wireless_mesh_network">Wireless
199 mesh network
</a> there are around
70 competing schemes for routing
200 packets across mesh networks, and OLSR, B.A.T.M.A.N. and
201 B.A.T.M.A.N. advanced are protocols used by several free software
202 based community mesh networks.
</p>
204 <p>The batman-adv protocol is a bit special, as it provide layer
2
205 (as in ethernet ) routing, allowing ipv4 and ipv6 to work on the same
206 network. One way to think about it is that it provide a mesh based
207 vlan you can bridge to or handle like any other vlan connected to your
208 computer. The required drivers are already in the Linux kernel at
209 least since Debian Wheezy, and it is fairly easy to set up. A
210 <a href=
"http://www.open-mesh.org/projects/batman-adv/wiki/Quick-start-guide">good
211 introduction
</a> is available from the Open Mesh project. These are
212 the key settings needed to join the Oslo meshfx network:
</p>
215 <tr><th>Setting
</th><th>Value
</th></tr>
216 <tr><td>Protocol / kernel module
</td><td>batman-adv
</td></tr>
217 <tr><td>ESSID
</td><td>meshfx@hackeriet
</td></tr>
218 <td>Channel / Frequency
</td><td>11 /
2462</td></tr>
219 <td>Cell ID
</td><td>02:BA:
00:
00:
00:
01</td>
222 <p>The reason for setting ad-hoc wifi Cell ID is to work around bugs
223 in firmware used in wifi card and wifi drivers. (See a nice post from
225 "
<a href=
"http://tiebing.blogspot.no/2009/12/ad-hoc-cell-splitting-re-post-original.html">Information
226 about cell-id splitting, stuck beacons, and failed IBSS merges!
</a>
227 for details.) When these settings are activated and you have some
228 other mesh node nearby, your computer will be connected to the mesh
229 network and can communicate with any mesh node that is connected to
230 any of the nodes in your network of nodes. :)
</p>
232 <p>My initial plan was to reuse my old Linksys WRT54GL as a mesh node,
233 but that seem to be very hard, as I have not been able to locate a
234 firmware supporting batman-adv. If anyone know how to use that old
235 wifi access point with batman-adv these days, please let me know.
</p>
237 <p>If you find this project interesting and want to join, please join
238 us on IRC, either channel
239 <a href=
"irc://irc.freenode.net/#oslohackerspace">#oslohackerspace
</a>
240 or
<a href=
"irc://irc.freenode.net/#nuug">#nuug
</a> on
241 irc.freenode.net.
</p>
243 <p>While investigating mesh networks in Oslo, I came across an old
244 research paper from the university of Stavanger and Telenor Research
245 and Innovation called
246 <a href=
"http://folk.uio.no/paalee/publications/netrel-egeland-iswcs-2008.pdf">The
247 reliability of wireless backhaul mesh networks
</a> and elsewhere
248 learned that Telenor have been experimenting with mesh networks at
249 Grünerløkka in Oslo. So mesh networks are also interesting for
250 commercial companies, even though Telenor discovered that it was hard
251 to figure out a good business plan for mesh networking and as far as I
252 know have closed down the experiment. Perhaps Telenor or others would
253 be interested in a cooperation?
</p>
255 <p><strong>Update
2013-
10-
12</strong>: I was just
256 <a href=
"http://lists.alioth.debian.org/pipermail/freedombox-discuss/2013-October/005900.html">told
257 by the Serval project developers
</a> that they no longer use
258 batman-adv (but are compatible with it), but their own crypto based
265 Tags:
<a href=
"http://people.skolelinux.org/pere/blog/tags/english">english
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/mesh network">mesh network
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/nuug">nuug
</a>.
270 <div class=
"padding"></div>
274 <a href=
"http://people.skolelinux.org/pere/blog/Videos_about_the_Freedombox_project___for_inspiration_and_learning.html">Videos about the Freedombox project - for inspiration and learning
</a>
280 <p>The
<a href=
"http://www.freedomboxfoundation.org/">Freedombox
281 project
</a> have been going on for a while, and have presented the
282 vision, ideas and solution several places. Here is a little
283 collection of videos of talks and presentation of the project.
</p>
287 <li><a href=
"http://www.youtube.com/watch?v=ukvUz5taxvA">FreedomBox -
288 2,
5 minute marketing film
</a> (Youtube)
</li>
290 <li><a href=
"http://www.youtube.com/watch?v=SzW25QTVWsE">Eben Moglen
291 discusses the Freedombox on CBS news
2011</a> (Youtube)
</li>
293 <li><a href=
"http://www.youtube.com/watch?v=Ae8SZbxfE0g">Eben Moglen -
294 Freedom in the Cloud - Software Freedom, Privacy and and Security for
295 Web
2.0 and Cloud computing at ISOC-NY Public Meeting
2010</a>
298 <li><a href=
"http://www.youtube.com/watch?v=vNaIji_3xBE">Fosdem
2011
299 Keynote by Eben Moglen presenting the Freedombox
</a> (Youtube)
</li>
301 <li><a href=
"http://www.youtube.com/watch?v=9bDDUyJSQ9s">Presentation of
302 the Freedombox by James Vasile at Elevate in Gratz
2011</a> (Youtube)
</li>
304 <li><a href=
"http://www.youtube.com/watch?v=zQTmnk27g9s"> Freedombox -
305 Discovery, Identity, and Trust by Nick Daly at Freedombox Hackfest New
306 York City in
2012</a> (Youtube)
</li>
308 <li><a href=
"http://www.youtube.com/watch?v=tkbSB4Ba7Ck">Introduction
309 to the Freedombox at Freedombox Hackfest New York City in
2012</a>
312 <li><a href=
"http://www.youtube.com/watch?v=z-P2Jaeg0aQ">Freedom, Out
313 of the Box! by Bdale Garbee at linux.conf.au Ballarat,
2012</a> (Youtube)
</li>
315 <li><a href=
"https://archive.fosdem.org/2013/schedule/event/freedombox/">Freedombox
316 1.0 by Eben Moglen and Bdale Garbee at Fosdem
2013</a> (FOSDEM)
</li>
318 <li><a href=
"http://www.youtube.com/watch?v=e1LpYX2zVYg">What is the
319 FreedomBox today by Bdale Garbee at Debconf13 in Vaumarcus
320 2013</a> (Youtube)
</li>
324 <p>A larger list is available from
325 <a href=
"https://wiki.debian.org/FreedomBox/TalksAndPresentations">the
326 Freedombox Wiki
</a>.
</p>
328 <p>On other news, I am happy to report that Freedombox based on Debian
329 Jessie is coming along quite well, and soon both Owncloud and using
330 Tor should be available for testers of the Freedombox solution. :) In
331 a few weeks I hope everything needed to test it is included in Debian.
332 The withsqlite package is already in Debian, and the plinth package is
333 pending in NEW. The third and vital part of that puzzle is the
334 metapackage/setup framework, which is still pending an upload. Join
335 us on
<a href=
"irc://irc.debian.org:6667/%23freedombox">IRC
336 (#freedombox on irc.debian.org)
</a> and
337 <a href=
"http://lists.alioth.debian.org/mailman/listinfo/freedombox-discuss">the
338 mailing list
</a> if you want to help make this vision come true.
</p>
344 Tags:
<a href=
"http://people.skolelinux.org/pere/blog/tags/debian">debian
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/english">english
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/freedombox">freedombox
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/sikkerhet">sikkerhet
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/surveillance">surveillance
</a>,
<a href=
"http://people.skolelinux.org/pere/blog/tags/web">web
</a>.
349 <div class=
"padding"></div>
353 <a href=
"http://people.skolelinux.org/pere/blog/Recipe_to_test_the_Freedombox_project_on_amd64_or_Raspberry_Pi.html">Recipe to test the Freedombox project on amd64 or Raspberry Pi
</a>
359 <p>I was introduced to the
360 <a href=
"http://www.freedomboxfoundation.org/">Freedombox project
</a>
361 in
2010, when Eben Moglen presented his vision about serving the need
362 of non-technical people to keep their personal information private and
363 within the legal protection of their own homes. The idea is to give
364 people back the power over their network and machines, and return
365 Internet back to its intended peer-to-peer architecture. Instead of
366 depending on a central service, the Freedombox will give everyone
367 control over their own basic infrastructure.
</p>
369 <p>I've intended to join the effort since then, but other tasks have
370 taken priority. But this summers nasty news about the misuse of trust
371 and privilege exercised by the "western" intelligence gathering
372 communities increased my eagerness to contribute to a point where I
373 actually started working on the project a while back.
</p>
375 <p>The
<a href=
"https://alioth.debian.org/projects/freedombox/">initial
376 Debian initiative
</a> based on the vision from Eben Moglen, is to
377 create a simple and cheap Debian based appliance that anyone can hook
378 up in their home and get access to secure and private services and
379 communication. The initial deployment platform have been the
380 <a href=
"http://www.globalscaletechnologies.com/t-dreamplugdetails.aspx">Dreamplug
</a>,
381 which is a piece of hardware I do not own. So to be able to test what
382 the current Freedombox setup look like, I had to come up with a way to install
383 it on some hardware I do have access to. I have rewritten the
384 <a href=
"https://github.com/NickDaly/freedom-maker">freedom-maker
</a>
385 image build framework to use .deb packages instead of only copying
386 setup into the boot images, and thanks to this rewrite I am able to
387 set up any machine supported by Debian Wheezy as a Freedombox, using
388 the previously mentioned deb (and a few support debs for packages
389 missing in Debian).
</p>
391 <p>The current Freedombox setup consist of a set of bootstrapping
393 (
<a href=
"https://github.com/petterreinholdtsen/freedombox-setup">freedombox-setup
</a>),
394 and a administrative web interface
395 (
<a href=
"https://github.com/NickDaly/Plinth">plinth
</a> + exmachina +
396 withsqlite), as well as a privacy enhancing proxy based on
397 <a href=
"http://packages.qa.debian.org/privoxy">privoxy
</a>
398 (freedombox-privoxy). There is also a web/javascript based XMPP
399 client (
<a href=
"http://packages.qa.debian.org/jwchat">jwchat
</a>)
400 trying (unsuccessfully so far) to talk to the XMPP server
401 (
<a href=
"http://packages.qa.debian.org/ejabberd">ejabberd
</a>). The
402 web interface is pluggable, and the goal is to use it to enable OpenID
403 services, mesh network connectivity, use of TOR, etc, etc. Not much of
404 this is really working yet, see
405 <a href=
"https://github.com/NickDaly/freedombox-todos/blob/master/TODO">the
406 project TODO
</a> for links to GIT repositories. Most of the code is
407 on github at the moment. The HTTP proxy is operational out of the
408 box, and the admin web interface can be used to add/remove plinth
409 users. I've not been able to do anything else with it so far, but
410 know there are several branches spread around github and other places
411 with lots of half baked features.
</p>
413 <p>Anyway, if you want to have a look at the current state, the
414 following recipes should work to give you a test machine to poke
417 <p><strong>Debian Wheezy amd64
</strong></p>
421 <li>Fetch normal Debian Wheezy installation ISO.
</li>
422 <li>Boot from it, either as CD or USB stick.
</li>
423 <li><p>Press [tab] on the boot prompt and add this as a boot argument
424 to the Debian installer:
<p>
425 <pre>url=
<a href=
"http://www.reinholdtsen.name/freedombox/preseed-wheezy.dat">http://www.reinholdtsen.name/freedombox/preseed-wheezy.dat
</a></pre></li>
427 <li>Answer the few language/region/password questions and pick disk to
430 <li>When the installation is finished and the machine have rebooted a
431 few times, your Freedombox is ready for testing.
</li>
435 <p><strong>Raspberry Pi Raspbian
</strong></p>
439 <li>Fetch a Raspbian SD card image, create SD card.
</li>
440 <li>Boot from SD card, extend file system to fill the card completely.
</li>
441 <li><p>Log in and add this to /etc/sources.list:
</p>
443 deb
<a href=
"http://www.reinholdtsen.name/freedombox/">http://www.reinholdtsen.name/freedombox
</a> wheezy main
445 <li><p>Run this as root:
</p>
447 wget -O - http://www.reinholdtsen.name/freedombox/BE1A583D.asc | \
450 apt-get install freedombox-setup
451 /usr/lib/freedombox/setup
453 <li>Reboot into your freshly created Freedombox.
</li>
457 <p>You can test it on other architectures too, but because the
458 freedombox-privoxy package is binary, it will only work as intended on
459 the architectures where I have had time to build the binary and put it
460 in my APT repository. But do not let this stop you. It is only a
461 short "
<tt>apt-get source -b freedombox-privoxy
</tt>" away. :)</p>
463 <p>Note that by default Freedombox is a DHCP server on the
464 192.168.1.0/24 subnet, so if this is your subnet be careful and turn
465 off the DHCP server by running "<tt>update-rc.d isc-dhcp-server
466 disable
</tt>" as root.</p>
468 <p>Please let me know if this works for you, or if you have any
469 problems. We gather on the IRC channel
470 <a href="irc://irc.debian.org:
6667/%
23freedombox
">#freedombox</a> on
471 irc.debian.org and the
472 <a href="http://lists.alioth.debian.org/cgi-bin/mailman/listinfo/freedombox-discuss
">project
473 mailing list</a>.</p>
475 <p>Once you get your freedombox operational, you can visit
476 <tt>http://your-host-name:8001/</tt> to see the state of the plint
477 welcome screen (dead end - do not be surprised if you are unable to
478 get past it), and next visit <tt>http://your-host-name:8001/help/</tt>
479 to look at the rest of plinth. The default user is 'admin' and the
480 default password is 'secret'.</p>
486 Tags: <a href="http://people.skolelinux.org/pere/blog/tags/debian
">debian</a>, <a href="http://people.skolelinux.org/pere/blog/tags/english
">english</a>, <a href="http://people.skolelinux.org/pere/blog/tags/freedombox
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