i have exactly the same problem! CCTV streams fine within my intranet, but not over internet!
I am using a Thomson router and I have port forwarded successfully, at least I think i have!
I have set ports 85 and 86 on the "H264 Network DVR" Chinese Cheapie that I have as the TCP and HTTP ports, I forward the range 85-86 on the modem, I can connect to them on my laptop, but only see the Quicktime logo! When I click the play buttons, the mini screens go blank : (
help??