My ISP closed some ports need help!

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Basically my isp has closed some ports, well I should say they have
closed all ports except for port 80 of course. Which doesn't really
bother me until I tried to do web cam chatting with my girlfriend back
home. I know that there is something called port forwarding, yet I know
nothing about it, can someone steer me in the correct direction to get
around this issue. Thanks in advance.

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