-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Prof. Robert Mathews (OSIA) wrote:
Fellow Nanogers:
Reports have floated across my desk in the past week, which have suggested that iPhones owned by faculty, staff and students have been flooding university campus Wi-Fi networks in parts of the country. For example, see: *"Duke Wi-Fi Crippled by Apple iPhones" *at http://www.sci-tech-today.com/story.xhtml?story_id=10200AG9NMHU Since that story first aired, and by applying a patch that was subsequently provided by Cisco, Duke has now come to see the elimination of the problem, see: "*Duke Resolves iPhone, Wi-Fi Outage Problems"* at http://www.eweek.com/article2/0,1895,2161065,00.asp
There are certain aspects of this story in which I have the most interest, and the following questions (if I may be permitted to list them) detail my concern - adequately. I wish to ask you: 1) is the iPhone an extra-ordinary device when comparing it with devices of a comparable nature, which also request ties to a Wi-Fi network, (there are many that use Wi-Fi enabled Smart-phones and PDAs on campuses -- so, why do 'they' not pose a similar problem) 2) is this problem a result of poor planning and services implementation at certain campuses, 3) is this story - a product of great exaggerations? 4) if there are technical issues indeed that permit iPhones in particular to DoS Wi-Fi nets, what can these storms be attributed to, and what can/should be done about it?
Hi Robert, While I am not at liberty to discuss specifics of customer cases, I think that you will find some of the answers to your questions in a Cisco Security Advisory which was released today: http://www.cisco.com/warp/public/707/cisco-sa-20070724-arp.shtml - -Mike-
If you are in a position to respond, I would like to hear from you, either publicly or privately. If there is enough group interest in the matter, I would be most happy to summarize.
All the best, Robert. --
- -- Mike Caudill <mcaudill@cisco.com> PSIRT Incident Manager DSS PGP: 0xEBBD5271 +1.919.392.2855 / +1.919.522.4931 (cell) http://www.cisco.com/go/psirt -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFGpkkoimPJSeu9UnERApprAJ9KYWlGBiSsjDUeBhtdBusbmO8BIwCfbIjs C2UXzGWZ3biS7EmZSf6hzz4= =1Ne9 -----END PGP SIGNATURE-----