Eugh.. iPhones causing wireless DoS

[Oops_my_bad]

Here's a strange one. Both my technicians have an iPhone3g which is hooked upto the campus wireless. However it appears these phones are causing a DoS on any access point they associate with (rapid association/deassociation - after a few of these the AP shuts off for a few minutes, disconnecting anyone who may have been on it and preventing new connections). It only appears to affect these 2 iPhones that have the WPA2 key. Other iPhones that may be on site don't seem to be causing issues however I would to fix this before we roll out open wireless to kids! (as presumably some will have iPhones)

 

Has anyone ever seen anything like this? As far as I know these iPhones are running the latest software and our wireless system (3com managed) is all upto date

[FN-GM]

Are they jailbroken or anything?

 

Are these to phones using the same firmware version as ones that dont cause the issue?

[Oops_my_bad]

Good point yes..I believe they are jailbroken - how would this make their wireless behave this way?

 

I don't think it's malicious or anything..

[FN-GM]

It might be worth comparing to see if any of the phones that dont cause the wireless upset are jailbroken.

 

I dont know what will cause it but it might be something to do with the modified firmware.