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Results tagged with firewall
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user 248694
Typically software that runs to prevent network traffic from reaching a computer. Also a hardware device that works on a network level rather than running on a single computer.
3
votes
How to find culprit blocking TCP ports 80, 443, and 5223 on macOS?
You can check to see if the ports are already in use by another application by using the command lsof -Pn -i4 | grep :YOURPORT. For example, when I run it I get:
$ lsof -Pn -i4 | grep :9300
testApp …
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