If your goal is to just send basic commands, and avoid rewriting you models, I suggest you to create a PID server in combination with a web/JavaScript site as GUI.
The PID server monitors the PID’s of the strategies running on the server and executes the commands as they come. The server could consist of a webserver listening on port 8888 with a simple JSON interface, to make it super flexible.
Get a nice ‘Admin Panel’ on http://themeforest.net, and you are all set!
GoogGood practices regarding security:
- Only allow JSON posts to the PID server from the webservers IP.
- Use validation of the incoming commands, so the PID server cannot be used to take over the strategy server.
- Encrypt the commands being send back and forth.
Getting up to speed
It's a really simple implementation, basically just a webserver that feeds your models the desired commands through the CMD.
Be aware! I found the two links just now, and I do not guarantee the quality of code in the webserver.