The OIT IPSEC VPN is NOT officially supported on iOS devices. However, users have reported success following the steps outlined below.
Also, here ia a link to some GENERIC info on Apple's website about VPN configuration. Please refer back to this FAQ for the specific information that you will need.
The OIT IPSEC VPN client is built into iOS. To set it up, navigate to Settings>General>VPN. Choose "Add VPN Configuration...". On the Add Configuration screen select the IPSec tab and enter the following required information:
Description: Georgia Tech Server: ipsec.vpn.gatech.edu Account: (Your GT account) Password: (Leave blank to ask every time) Group Name: gatech Secret: vpn4tech
Then tap the Save button. The VPN can be activated from the
screen. Move the VPN slider from Off to On.
Enter your password, and tap OK.
You should receive a VPN connection message.
Tap OK and you're logged into the VPN. A little VPN icon will be visible in the status bar in the upper left hand corner.
To disconnect from the VPN move the VPN slider in Settings to Off.