I guess I have to start with some background before I get bombarded with 'why' questions. I work at a large corporation which I will call a-company. They use domain servers and a proxy/firewall to control internet access. In reality I work directly for another company who contracts out to a-company, but I work on site at a-company and am allowed to access their network for email and internet. IT support for a-company is contracted out and under the contract they will only support a-company corporate assets. Because of my employment arrangement the computer I use is not an a-company asset so I do not have an asset number and cannot obtain support from them. Now, here's the actual question.
I have been using a Windows XP computer for several years and was always able to access the internet even without joining the domain. Recently I have upgraded to another computer that uses Windows 7 and now I cannot access the internet. I do still have complete internal network access, but the proxy is blocking me from accessing anything outside. Even google is blocked.
Here is what I know so far. My XP computer can still access the internet and I can access the internet by logging on at any of the domain computers. I tested two other computers with the following results. A different Windows XP machine could not connect. I joined it to the domain and it could connect. However, it cannot connect again when I am not logged in to the domain or if I remove the computer from the domain. A different Windows 7 machine could not connect. I joined it to the domain and it could connect. I removed it from the domain and it still retained access to the internet, like my original XP computer. On my new Windows 7 machine it can access the internet if I join the domain but cannot again as soon as I leave. So it's clear this has nothing to do with changing from XP to 7 or with my account access.
My goal is go make my main Windows 7 computer act like the test machine that can still connect to the internet without joining the domain. I use my own company's profile and don't want the domain profile loaded. The only thing I can think is this might have something to do with local security policies but I don't know where to look.