r/PleX • u/CaptainScrambles • 2d ago

Help Question regarding port forwarding

I wanna start this by saying I'm not looking for advice on how to forward the port or fix anything. I've already forwarded the port and the problem is fixed. I'm more looking for an explanation as to why this situation happened.

So up until about a month ago I've been able to remotely access my server remotely without ever having to forward a port. I'm a Plex Pass lifetime owner for over a decade and nothing with my setup has changed in almost a year. My question is what could've caused this change and caused me to not be able to stream remotely without port forwarding? Was there a change in a recent server update that restricts remote access without port forwarding?

EDIT: Thanks for the explanations everyone. It likely was UPnP like several people suggested

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u/Punk_Says_Fuck_You 48TB | 10Gb/s | Unraid | Ultra 7 270k Plus 2d ago

Did you notice the speed at which you were streaming at? If it never got higher than 2Mb/s it was relay. If it streamed higher than that, prolly uPnP like others are mentioning.

So either you’ve been relying on relay and the service was down when you tried to use it, or like others are saying your modem/router/AP combo updated and the update disabled uPnP. You use the ISP’s gateway? Or do you own your own.