For a while now its been bugging me, that I was unable to use our radius controlled wifi-access on campus from my iPhone, so it was time to investigate how to resolve it.
It turned out to be ridiculously easy 
First you need to download and install the iPhone Configuration Utility 1.0.1 to your Mac
From within this tool you make a new configuration profile containing the right radius authentication with TTLS-PAP

Afterwards you export the .mobileconfig file (which is basically a normal mac plist XML based file)
Now upload the file to a webserver of your liking fx. Apache - and change the httpd.conf file to include the following MIME-type to recognize the file on the iPhone
AddType application/x-apple-aspen-config mobileconfig
Now open up Safari on the iPhone and go to the URL, where the .mobileconfig-file is located.
You now get the option to install the configuration. Press the Install button. (Sorry - text on screenshots is in Danish!)
You now get prompted to type in your radius username - type it and press Next
Now you get prompted to type in your radius password - type it and press Next
Press OK to the confirmation that the configuration has been installed.
Now go to the Preference wifi-pane on the iPhone and choose eduroam, you will get prompted with the radius certificate - press Agree
Congratulations - you're now on eduroam/radius with TTLS-PAP authentication
Thanks!
The same system is now being used at Hogeschool Rotterdam in The Netherlands, even the network is named 'eduroam'. This works perfect. I now have a fully working internet connection on my iPhone 3G. Thanks to this my iPhone and my MacBook are on the same network, so I can access my (jailbreaked) iPhone 3G through my MacBook.
Posted by Yavuz Selim on January 10, 2009 at 11:12 AM CET #
URL for the iPhone Configuration Utility has changed, it can now be found here http://www.apple.com/support/iphone/enterprise/
Posted by Lasse Osterild on February 25, 2009 at 10:35 AM CET #
THANks, i was looking for this and i founded. THANKS a LOT
Posted by Mark on June 04, 2009 at 01:14 AM CEST #