Mac port open check #3) Now enter sudo nano /etc/pf. >nc -vnzu 1xx. As an example, the Control Centre process is, on my Mac, listening on TCP ports 5000 and 7000. This tool is useful for finding out if your port forwarding is setup correctly or if your server applications are being blocked by a firewall. Port check - Tests if TCP port is opened on specified IP. . May 4, 2014 · Hi Drew, It probably depends on the router as to the method used to open the ports. 사용중인 포트 목록 조회 sudo lsof -PiTCP -sTCP:LISTEN 특정 포트 조회 sudo lsof -i :PORT_NUMBER PORT_NUMBER 자리에 원하는 포트를 적어주면 된다. If you want to find out what process has a port open, try this: lsof -i :5955 If you want to know whether a port is open, you can do the same lsof command (if any process has it open, it's open; otherwise, it's not), or you can just try to connect to it, e. #5) Type ‘pass in inet proto tcp from any to any port (add port number) no state. fwwbiakeannciuhlbzzoboyzhqlkimvsujbftiqvmqyczvewgkqsvjiiteuylxxplbrlyktu