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Is there a simple way to detect ISP port blocking?

Fresh5 days ago
Mar 15, 202691504 views
Confidence Score0%
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Problem

Is there a way to tell the difference between my ISP blocking traffic on certain ports and my NAT router/firewall blocking that traffic? The sites “Shields Up” and “Can you see me” show my ports closed or not accessible, but I assume that is primarily due to the NAT router. (Obviously, I could just…

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Fix for: Is there a simple way to detect ISP port blocking?

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This will take a lot of time but will get you the list of all blocked ports:

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