There is no way to access the Internet from inside Iran, not for private citizens, nor for companies, or even many server hosts. Just very very few places, directly linked and controlled by the government, have limited Internet access.

There is not even the option to call phone lines inside Iran, or call abroad from Iran (not tried direct call, but no VoIP works).

You still can access any server inside Iran ("Internet-e-Melli" or National Internet, they call it), but none of these servers in turn have access to free Internet.

Would love to hear your thoughts if there is a technical way to bypass such restriction (me and my friends, fairly tech savvy, could not find a way).