When I use matlabpool open, three windows security warnings pop up (http://postimg.org/image/x5ku7iiyv/). Three .exe include matlab.exe, smpd.exe and mpiexec.exe. As I hesitated, m file is running. I check by "Control Panel?System and Security?Allow a Program through Windows Firewall Allowed Programs dialog box" and find these three .exe are allowed to pass the firewall. Is it necessary to run matlabpool? It never happened before. Is it safe? Could I block them? I've surfed, but few had this question.