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Discussion on: Capture the Flag: It's a game for hack...I mean security professionals

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Brian Teller

For OUTGOING requests you'd be correct. However for INCOMING (hosting on a port) most home internet services providers (like COMCAST) block hosting anything on a public IP on port 80 or 443 (also 25 which is mail). This is to limit people from trying to host a web site on their home internet (and a spam mail server in the case of 25).

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Joel Bennett

That makes sense.