Using Plex over Fritz 6890 LTE

Plex Media Server Remote Access
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Server Version#: 1.16.1.1291
Player Version#: 5.16.1

Recently I switched my Internet service to purely LTE instead of ADSL as fiber-optic cabling was not possible in my rented apartment.

Since then I have been unable to access Plex remotely no matter what I do. I imported all of the router settings from my Fritz 7570 but there seems to be settings that simply don’t exist on the Fritz 6890, such as PPoe or Bridge functionality. The port forwarding and static IP address seem to be set correctly and when I play with the server settings it briefly flashes as green before reverting to not connected within 5 seconds.

I then get the dreaded it looks like you are connected to multiple routers or other devices message, which of course I am not since I only now have one device instead of a router and a modem. There is clearly a Double-NAT issue going on according to WhatsMyI.Host but since there are no Bridge settings.

If anyone has any ideas from this description of the problem I am all ears. Thanks in advance

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Using LTE will put you into a carrier-grade-NAT. https://en.wikipedia.org/wiki/Carrier-grade_NAT

Unless your ISP offers some solutions for businesses, so they can operate servers, you are completely out of luck here.

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Nuts, but thanks for your very quick and clear response.

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Indeed you are behind CG-NAT (at least on IPv4, but not many European telco’s have rolled out IPv6 on mobile networks yet), and port forwarding will not work. Direct connections are impossible, but Plex Relay should still work.

My server is also behind a 4G router (not a Fritzbox but a Zyxel LTE3316), IPv4 only, CG-NAT so no direct connections, but streaming does work. However, Relay is only 1 Mbit for free users, 2 Mbit for Plex Pass holders. Good for audio, not so great for video.

Relay can be a bit picky - for some mysterious reason Relay streaming works with the iOS app, in the Opera browser on macOS and with Plexamp on Windows, but not with Plexamp on macOS nor on Firefox on macOS.

If you cannot get Relay to work, your other option is to make such a relay yourself: set up a VPN server/gateway somewhere that does accept incoming connections (rent a VPS, or put a Raspberry Pi at a friends house). Then keep your Plex server connected to that VPN, and voila: remote access. This is not a solution for beginners, but it does work.

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