No it isnt? The modem should be 192.168.1.2. If he was the first device to connect to the network, the modem would have given him 192.168.1.2. He is telling the modem that any incoming connection for port 80 should be directed to his computer at 192.168.1.2.
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maplefreak26; out of sheer curiosity, you ARE trying to connect to your external address, right?
Edit: one more thing I should mention. Are you 100% sure that Comcast doesn't block incoming port 80 connections? I know that certain ISP's REALLY don't like servers on their residential internet (it is usually stated in their TOS) and may just block it by default.
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