title: Will a firewall block local TCP communication between processes?
body: <p>I am splitting an application into a tray application and a Windows Service and I want to use TCP to communicate between the two*. They will both be running on the same machine.</p>
  
  <p>My question is do firewalls block TCP communication between applications running on the same machine? I want to know whether firewalls are something I need to worry about when testing.</p>
  
  <p>(*note that I want to use TCP instead of named pipes for communication because the apps might one day run on separate computers but that will be far in the future)</p>