IRIS : developing a new node concept ¶

In the IRIS project we are developing a new node concept based on a separation of the 'radio interfaces' and the 'base node'.

Tim Baas, student at ​Hogeschool Leiden has prototyped the software as his afstudeerwerk. His documentation is available in the ​svn projects iris-directory (in Dutch).

The NanoBSD page is the place to be for up2date information on how to build/configure/create a ​WL node image. As always this project could use your help, by Contributing to various parts of the project.

The ConfigureBridge page shows you which bridges we use and how-to configure them. The WLCaptivePortal shows you how-to configure the captive portal software.

Concept ¶

A node, type IRIS, is built using NanoBSD with some extensions a.o. to make package management a bit easier. Also the internet gateway (providing internet connectivity to the local wireless network) is based on NanoBSD.

The nodes are FreeBSD routers with slave DNS (dnsmasq), lvrouted as a dynamic internal routing daemon, thttpd webserver and a python based captive portal based on ipfw and {tcpserver for the plain HTTP-redirects. Moreover there are some additions which are essential for large scale network monitoring such a nagios plugins and bandwith measurment tools (iperf).

A proxy gateway is a http-proxy based on tinyproxy and an authorative DNS server (MaraDNS). Included is also reverse ssh-tunneling (for remote management behind NAT firewalls). Nodes use pen with a home-build pen-wrapper to select the 'best' proxy (i.e. the highest bandwith). An alternative is a packet filtering firewall using ipfw to allow only port 80, 443 rate limited traffic. Packet filtering gateways use lvrouted to advertise a default route.

See also the youtube video's for the initial pilot description:

• ​Presenatie Tim Baas, deel 1
• ​Presentatie Tim Baas, deel 2

Roll out ¶

In the course of 2009/2010/2011/2012 we have revamped most of our nodes (some still left to be modified in 2012) and also built some new ones. We have chosen the following hardware configuration:

• nodemachine based on a ALIX2D3 board with 1 GB compact flash card containing the software.
• 802.11a interlinks based on Ubiquity NanoStation5, NanoStation5M, Bullet5.
• Local accesspoint with 8 dB omni antenna and Atheros CM9 MiniPCI wireless card.

Open Tickets ¶

Ticket	Summary	Status	Owner	Reporter	Keywords
#251	net/pen package 'fatal error'	new	nobody	huub
#248	captive portal forwarding naar sponsor	new	nobody	huub
#247	Checking for packages with security vulnerabilities: cron mail output warnings	new	nobody	rick
#246	ssh stopt / moeizaam	new	nobody	huub
#244	index.cgi: geen python meer	new	nobody	huub
#243	9MB /var space used by /var/db/pkg/	new	nobody	rick

Starting Points for Trac ¶

• TracGuide -- Built-in Documentation
• ​The Trac project -- Trac Open Source Project
• ​Trac FAQ -- Frequently Asked Questions
• TracSupport -- Trac Support

For a complete list of local wiki pages, see TitleIndex.