Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Does anyone know what port 49176 means on a Mac? I cannot find any info on this particular port. I'm on Mountain Lion, and using nmap from Ubuntu machine to test the Mac's firewall.

This is what nmap says:

80/tcp    open  http
49176/tcp open  unknown
share|improve this question
Please open Terminal, type lsof -i -P | grep 49176 and report back. – jaume Nov 14 '12 at 9:50
@jaume no output for that command. – Sandro Dzneladze Nov 14 '12 at 10:10
And what is the output of nmap? Can you add it to your question? – jaume Nov 14 '12 at 10:15
And what does netstat -an | grep 49176 say? (Run it also inside Terminal on your Mac.) – jaume Nov 14 '12 at 10:35
Next time this happens, run lsof -i -P | grep <port> on the Mac, you will see the application that binds to that port. If the Mac's firewall is active it must be one of the applications listed in System Preferences>Security & Privacy>Firewall with comment Allow incoming connections. – jaume Nov 14 '12 at 14:53

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.