Are you running a hotspot and you want to prevent users from using "hotspot shield"? Hotspot shield is OpenVPN based. Btw is there a special reason why you want to block this program? Alternatively you may block all ports except 80,443,22,21,20 so that only ssh, http, https and ftp will work.
Extracting the IP addresses from an exe file is quite hopeless.
Maybe this will be of interest:
http://forums.whirlpool.net.au/forum...m/1045253.html
http://forums.opendns.com/comments.p...cussionID=5307