I have no experience with LEAP but it looks like it's been done
before.  A quick google search for "VPN LEAP" turned this up:

http://uwadmnweb.uwyo.edu/ASKIT/howto/connectivity/vpn/12303vpnUnix.htm

HTH
-scot

On 9/29/05, Callum Lerwick <seg at haxxed.com> wrote:
> Hey, I notice there was a flier for the installfest posted in the ECC.
> Who posted it there? I ask because I'm really wanting to start some kind
> of linux/open source student group, unless there's already one I don't
> know about. The Linux presence on this campus seems to be rather low. I
> need to dig up some membership.
>
> I could also possibly use a ride to the installfest...
>
> Also, apparently they're now using a new VPN thing for the wireless on
> campus this year, its something called "LEAP". I have not been able to
> get it to work right with FC4. I've tried both xsupplicant and
> wpa_supplicant. xsupplicant just triggers a "buffer overflow detected"
> and dies, and wpa_supplicant just seems to sit in a loop trying to
> associate saying "no WPA/RSN IE". I can't find hardly any documentation
> regarding using LEAP, everything talks about PEAP and other things.
>
> I have both an Atheros AR5212 (madwifi driver) based card, and an ACX111
> based card.
>
> Has anyone ever done LEAP with Linux before?
>
>