already posted http://forum.mikrotik.com/viewtopic.php?f=2&t=92967 but should have been in this forum I think

To be able to watch video on demand my Setop box uses RTSP to start and stop streams.
http://en.wikipedia.org/wiki/Real_Time_ ... g_Protocol
The Setop box informs the streaming server about the ports it is listening on. Dynamic port-mappings should be made on the router for these ports back to the Setop BOX.
There is a module available for iptables which provides this. Will it be included in RouterOS in the future.?