List Process tied to Port

List a Processes tied to a Port

1. Determine the tcpcb (TCP Control Block) tied to the port.

   1. # netstat -Aan -f inet

   2. The output should be similar to the following.

      Active Internet connections (including servers)

      PCB/ADDR Proto Recv-Q Send-Q Local Address Foreign Address (state)

      f1000e0000527bb8 tcp 0 0 *.* *.* CLOSED

      f1000e00005233b8 tcp4 0 0 *.* *.* CLOSED

      f1000e001380dbb8 tcp4 0 0 *.13 *.* LISTEN

      f1000e0007a133b8 tcp 0 0 *.21 *.* LISTEN

      f1000e0000f28bb8 tcp6 0 0 *.22 *.* LISTEN

      f1000e0000f283b8 tcp4 0 0 *.22 *.* LISTEN

   3. The first column PCB/ADDR will be used.
   4. The rmsock command will be used to identify the process associated with the TCPCB.

      # rmsock <PCB/ADDR> tcpcb

   5. The output will be similar to the following.
      1. The socket 0xf1000e0000527808 is being held by proccess 5505230 (rmcd).
   6. Example.

      # rmsock f1000e0000527bb8 tcpcb

Further Reading

• Using netstat and rmsock to Identify Processes