I have an application which is separated to several parts (processes) communicating over TCP/IP, using a pre-defined port on localhost.
Is this always safe? Can some kind of a firewall (corporate, locally installed, Windows firewall, etc) block this traffic? Or can some user settings in the OS that can block this traffic?
The OSes I'm interested in are Windows (XP through 7) and Linux (Ubuntu, RHEL, SUSE)