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My ISP just sent me over a box and now I am online. I am afraid of beeing exposed directly to the internet. Is there any website or web app which can check to which level my machine is accessible from the internet?

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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
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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
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2 Answers 2

up vote 13 down vote accepted

Try 'Shields Up' by GRC

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You could try googling for the word "port scanner" to find a web service which will do a security check for you. However, please note that anyone offering to do this kind of check for you might also be gathering information in order to misuse it.

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the point is: people will google and if webapps become very very popular they will get to this post. to state here that googling will help initializes recursion :) –  akira Jul 1 '10 at 6:11
    
No, I'm suggesting googling for the words "port scanner" to find a web service which will do a port scan. I'm deliberately not suggesting a service, since I'm suspicious of anyone who runs a port scanning web service. –  delete Jul 1 '10 at 6:35
    
nevertheless: "googling" is not really an answer. you could put that "answer" to ALL the questions asked. –  akira Jul 1 '10 at 8:14
    
Are you just being obtuse or do you really not understand what I wrote? –  delete Jul 1 '10 at 8:35
    
the first implies the latter, so .. what is the point of your answer? –  akira Jul 1 '10 at 14:44
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