E-mail script tunneling

The paper proposes a method for synchronizing remote databases with a central database in difficult communication scenarios. Remote points only have occasional access to the Internet, and the central point is protected by a firewall that passes through only basic services, such as HTTP and e-mail. The method consists of using e-mail as a medium for sending shell script and receiving a response/result. High reliability and security of operation are achieved. This method can also be applied to various cases of remote control.