Thank you VERY MUCH for your response! Sorry for the long response - I appreciate your patience and support!
fyi... today is last day and my Serviio 1.8 Pro license will expire. Debug is enabled and I verified in RegEdit all Serviio info is correct.
I've been trying to resolve this now for 3 weeks and have read many articals about this topic on internet and this forum.
Ok, Yes, I have a complex setup and from my router I did enable port forwarding for 23424 and provided it with my internal static IP / NIC hosting serviio (10.10.1.x). My Windows Server is responsible for supporting DHCP IPs. DHCP on my router (192.168.0.x) is
disabled.
However, I did perform a simple test to see if my Serviio server media browser would work if I by-pass my internal Windows Server configuration and go directly to my router. On my Serviio server (10.10.1.x) I installed a wireless connection directly to router and disabled 10.10.1.x and enabled static IP 192.168.0.5 to the same Serviio server. On the router I enabled Port forwarding to 23424 to IP 192.168.0.5. In the Serviio tab under Remote I set the external IP to 192.168.0.5. I also temporarily disabled ALL windows firewalls and under Windows Firewall Exceptions - Serviio added 2 Exception called - 1) path: "C:\Program Files\bin\ServiioService.exe" 2) path: "C:\Program Files\Serviio\ServiioConsole.exe". Also under Windows Firewall under Advanced tab, there is a "Service" tab - "Select the services running on your network that Internet users can access." I added a service called" Serviio IP 192.168.0.5, External Port 23424, Internal Port 23424.
Ok, so at this point there is nothing between my router and my Serviio server (192.168.0.5).
My question, how would a user access this IP from the Internet? IP 192.168.0.5 is a private LAN IP. To access any of my private LAN IP, from the Internet, an external user must enter
http://www.ftinet.com (that's my domain). If I enter:
http://www.ftinet.com:23424/mediabrowser - this fails (timeout). At this point I disabled the static wireless IP and reverted back to my internal IP addresses 10.10.1.x...
On the back of my router I have x4 RJ45 jacks. One of those RJ45 jacks is a cable for my domain (
www.ftinet.com - 71.39.102.x) - which connects to a dedicated public NIC on my internal Windows server for hosting my website on port 80. This has worked great since 1996

On this same Windows Server (IIS website), there is another private NIC which is assigned static IP 10.10.1.x). On this Windows Server I enabled Routing and NATing. NAT was setup to allow all port forwarding for 23424 on IP 71.39.102.x -> 23424 IP 10.10.1.x (Serviio server).
In Routing and NATing I can see / trace all routers, ports, source IP, remote IP, destination IP, etc.... When I make a request from the Internet via
http://www.ftinet.com:23424/mediabrowser - I can see that this port is successfully getting routed to my Seviio Server on 10.10.1.x
The problem seems to be that Serviio is not responding or Serviio is responding but is unable to get out / respond to request.
Hope this helps.
Thank you!
-Scott