er... come to #tfp and ask meff or merk (or maybe they'll post) but from there they can scan your network externally and see whats open. There's a lot of tools, but to see whats acessible from outside your network you need to be....outside your network...
Network security is a difficult beast, its really not that bad to have ports open, just make sure they are password protected at the least if you are worried about unauthorized access..
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