JJM will have this functionality (when the new version is finished).
Its at the moment possible to execute a plus command an the restarting of the server, you will only need to forward the JJ2port-1 as TCP so if JJ is at 10052 you will have to forward 10051.

A picture of the admin center you can see here (Djazz made the php part):
http://img841.imageshack.us/i/jjmacp.png/

Some parts of the new JJM are not finished yet, so its too early to publish it...
Some previews of the new version:
http://www.youtube.com/watch?v=BRFY4S6stAo
http://www.youtube.com/watch?v=TtjQS4T3AQg

For this who dont know what JJM is / was:
JJM is working similar like plus, you only have the fact, that you are not starting the Jazz2.exe (or Jazz2+.exe), you have to start JJM.exe (this is starting JJ2 then).

Sfaizst