A method of filesystem-based communication of computer applications is provided. The method implemented using a filesystem communications interface (FCI) computer device coupled to a first computer and a second computer on which computer applications are installed. The method includes mounting file systems on the first computer and second computer by installing communications interface drivers, receiving a data transfer command that includes a data unit from the first computer, identifying that the data transfer command corresponds to a filesystem-based data transfer protocol, generating another data transfer command by converting the first data transfer command into a first network-based data transfer protocol, receiving the data unit from the first computer, and transmitting, using the second communications interface driver, the data unit to the second computer application by the using a third data transfer command.