How Do I Close Open Ports in Linux?
Contents How Do I Close an Open Port? a Port Isn’t Opened by the Operating System, It’s Opened by a Specific Program Wanting to Use It. to Close a Port, It’s...
Contents
How do I close an open port?
A port isn’t opened by the operating system, it’s opened by a specific program wanting to use it. To close a port, it’s usually only necessary to shut down the program holding the port open. On some ports it’s enough to tell the program or service that the port should not be opened.
How do I close an open socket in Linux?
Closing a socket in a running process is not impossible but difficult:
- locate the process : netstat -np. You get a source/destination ip:port portstate pid/processname map.
- locate the the socket’s file descriptor in the process lsof -np $pid. …
- Now connect the process: gdb -p $pid.
- Now close the socket:
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