How do I find what ports are being used on my mac?

697

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How do I know if my ftp port 21 is blocked?

588

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How do I stop pid 4 from using port 80?

598

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How do I unblock a port?

591

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Is port 80 open on my network?

610

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Is port forwarding dangerous?

681

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Is port forwarding necessary?

592

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What is port address?

609

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What is port 135 commonly used for?

626

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What is port number and why it is used?

590

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What is the difference between a port address a logical address and a physical address?

671

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What port number is 8080?

603

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Which port does netflix use?

603

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What is protocol extension?

616

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Is http based on tcp?

606

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