If this is a corporation computer then you need to talk to the IT department on this matter. Their setup most likely has restriction and this goes beyond the End user help forum and need IT approval to do what your asking. The reason you get no access to internet when you connect to their system is most likely Security protection they have to prevent security bypass that your trying to do here. If you want to access internet without issues then you should use your own personnel computer to do that with. Once you use their hardware you follow their rules.