Can you access it remotely? From phone and web browser it works ok from remote?
Is that computer where iVMS-4200 is installed remote or local? If local, add the device by the LAN IP. If remote, if it works from iVMS-4500 it will also work from iVMS-4200 if added correctly (as HiDDNS device).
First time I'm setting up IVMS on this machine so there isn't anything else. . I just forwared the RTSP port as well but no go either. I used port checker and confirm my HTTP port 8020, Server port 8000, and RTSP port 554 are all accessible.
installed ivms on a Win 7 machine and works fine. The ivms in question is on a Win 10 machine..
thought it was my AV so i disabled the AV and firewall but still no love. Could be a Win 10 issue but I don't have another Win 10 machine to try. Anyone else having issues with Win 10?