[Rathji]

I will preface this with the following:

If your work has blocking so you can't access some websites at work, it would likely get you fired if they caught you circumventing it like this. If I was your system admin, and caught you doing this, I would disable your account until your manager came down and told me to re-enable it.

That said, if you look up dual homing, it should give you all the info you need, depending on how the blocking at work is implemented.