wireless networking, free software, solar power

TV White Spaces Africa Forum 2013

Last week i attended the TV White Spaces Africa Forum 2013 https://sites.google.com/site/tvwsafrica2013/home, together with colleagues from the NSRC http://nsrc.org and ICTP http://wireless.ictp.it (thanks!). It was an event organised and largely sponsored by Google in partnership with a number of other organisations, including Microsoft http://www.microsoft.com/, Internet Society Senegal http://www.isoc.sn/, Afrinic http://www.afrinic.net/, APC http://www.apc.org/, and the Senegalese Ministry of […]

Consider wireless security with EAP/802.1x completely broken / obsolete

Second comment to the security debate, e.g. here http://www.cso.com.au/article/432039/tools_released_defcon_can_crack_widely_used_pptp_encryption_under_day/ http://revolutionwifi.blogspot.dk/2012/07/is-wpa2-security-broken-due-to-defcon.html So MSCHAPv2 is completely broken. No problem. For EAP/802.1x wireless security, that should not matter, as we only use it inside a tunnel (TTLS, PEAP) (SSL protected). Popular EAP/802.1x-methods: PEAP+MSCHAPv2 or TTLS+PAP or TTLS+MSCHAPv2   BUT In most networks, on most clients, certificate validation is […]

MS-CHAPv2, widely used in WPA2 Enterprise, broken (more so than we thought)?

Quoting this DEFCON 20 article https://www.cloudcracker.com/blog/2012/07/29/cracking-ms-chap-v2/ “MS-CHAPv2 is used quite heavily in WPA2 Enterprise environments. In their 1999 analysis of the protocol, Bruce Schneier and Mudge conclude “Microsoft has improved PPTP to correct the major security weaknesses described in [SM98]. However, the fundamental weakness of the authentication and encryption protocol is that it is only […]

X-CTU on Linux Ubuntu 10.04

  Using Digi XCTU on linux (ubuntu 10.04) Digi XCTU, http://ftp1.digi.com/support/documentation/90001003_A.pdf (last verified: Feb 2012) is a utility for configuring xbee modems. While it is a Windows application, it can easily be made to work on Linux. The following is no new information, rather just a confirmation and documentation of making this work on Linux Ubuntu […]

Low cost IPv6 gateway on a Linksys router

Here s a little guide on how to get started with your own IPv6 gateway on a Linksys WRT54GL router – or any other device that can run OpenWRT. http://itu.dk/pit/index.php?n=Main.IPv6-6to4onOpenWRTRouterBehindNAT This will enable you to get experienced with IPv6 in your own network, even if the ISPs and organisations around you are not yet ready […]

Why WiMax (still) is dead

Why WiMax still is dead Recently, we have been asked repeatedly again about the role of WiMax (802.16) in rural and remote networks. In brief, we still think it is not a preferred option, and here is why: * Price: Simply, for what it can do – it is too expensive. Smart use of cheaper […]