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My ISP just sent me over a box ("modem") and now I am online. I am afraid of beeing exposed directly to the internet.

How do I check to which level my machine is accessible from the internet?

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closed as off-topic by Al E., pnuts, Eight Days of Malaise, Alex, John C Jan 30 at 7:48

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Application/website recommendations are off-topic and out of scope. It is better instead to use a particular web app or website and ask for help in any issues you have with it specifically." – Al E., pnuts, Eight Days of Malaise, Alex, John C
If this question can be reworded to fit the rules in the help center, please edit the question.

I believe this is on topic because it is looking for a web application to accomplish a task, and there is a clear and great one to use, as already provided in the answers. – danivovich Jun 30 '10 at 23:31
I don't understand why it was closed. Surely a web-based firewall test is a web application. – conorgriffin Jun 30 '10 at 23:43
It's not offtopic, it just needs another title like: "Web App to check my machine exposure to the internet" – Luis Enrique Leon Jul 1 '10 at 0:25
Questions asking for web app recommendations are off-topic. – Al E. Jan 30 at 1:35
Now it's more a Security question – Eight Days of Malaise Jan 30 at 7:38

1 Answer 1

up vote 14 down vote accepted

Try 'Shields Up' by GRC

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