Nest Wifi Port Forwarding not forwarding

[Mandible]

I'm trying to host a web page and a plex server from one of my computers on the network. 
I have assigned my computer a static ip

I have setup port forwarding in the home application. 
I can get to the applications when I put in my local ip address with port. 

I cannot get to the applications when I put in the nest wifi router ip with port. 
I cannot get to the applications when I put in the external ip with port.  
I just keep getting error messages that the port isn't open which to me means I'm not getting forwarded.  
I have only a modem no other routers, I have a nest point as well, but I have unplugged that for now. 

I have tried restarting the network multiple times.  

I have tried disabling the firewall, no difference.  

I'm not sure what else I could try.  Is there a nest wifi dmz option that I could just send all external requests to my one computer on the network? 

[RXShorty]

Hi @Mandible 

Are you able to reach the plex server within your local network?
If not, port forwarding is not going to help out as this is only intended for external/internet access.

When it is not reachable from a local network client, your problem is somewhere on the server itself?
On what kind of device did you install the Plex server?

[Mandible]

Yes I can get to it directly in my network.  

[AbigailF]

Hey folks, 

@RXShorty, appreciate your helpful response. 
@Mandible, chiming in to ensure everything is good here. Were you able to see RXShorty's other questions? Let us know if you need more help.

Best,
Abi

[AbigailF]

Hi Mandible,

Checking back in should you still have some questions here. Let us know by replying to this thread. 

Regards, 
Abi

[Mandible]

Yes I figured it out.  
The ISP provided modem has the ability to be used as a router.  ( of which I was not using it in that way ) 
The wan line to my network was plugged in the incorrect port( not clearly labelled and was moved recently in my house ), which allowed internet traffic normally but created a double nat layer.  Once the wan line was plugged into the correct modem port my router port forwarding worked properly.  

[AbigailF]

Hey Mandible, 

Awesome — glad to hear that your issue is fixed. It looks like we can consider this one complete, so I will lock the thread shortly unless I can help out with anything else. 

Cheers, 
Abi