How to stop plex serving my [local] library via the internet

I use an internet modem/router and Google Wifi pucks. Plex is on a NAS directly wired to the router so I can get remote access. Originally there was a double NAT issue as I can’t switch DHCP off on the modem/router, hence a small network from the modem router to the NAS, and a larger network from the modem router to the 5 google pucks.
The only issue I have is watching plex at home with the tv connected to the google pucks wifi uploads the movies to my ISP and back again.
How can I prevent this, in the lockdown days the internet speed can be unusable?
Thanks

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Check the Dashboard/Details and you’ll probably find you’re in ‘Relay’ mode - due to something horrible. Don’t know what.

While you wait for @anon18523487 to show up - you can read and apply any helpful tips they may offer above.

Because your Google Pucks are acting as AP, they are just working on Layer 2, meaning your TV and Plex server are directly connected. Your traffic is not being sent to your ISP, but if your tv is getting an IP from a different range of the one offered by your modem, then you should change your Google devices to AP mode and let only the modem be the local DHCP server.

Thank you. I believe The google devices need at least one to be a dhcp server. The others are AP’s.
I can’t turnoff the router part of the modem router either.

Devices connected to your mesh WiFi is on a different network than your modem/router. In your PMS settings, under the network tab, there is an option for “LAN Network”. Enter the IP range for the network created by your mesh here.

Thank you. What is the format for entering an IP range?

My router has given the first google puck 192.168.1.65. My NAS is on 192.168.1.68.
The google puck then issues 192.168.85.nnn for my home network where the tv’s etc are connected.
Thanks

192.168.0.0/16

Fantastic, thanks so much

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