Physically moved server location, remote access working, is it secure?

So I moved my plex server to another physical location that’s behind a SonicWALL firewall attached to a comcast modem.

Remote access is enabled and working but only when I deselect “Manually specify public port”. The public IP in the blacked out section has xxx.xxx.xxx.xxx : 0 as the connection that’s working.

Is that ok and secure to run it like this? If I manually specify a port, remote access doesn’t work (I assume cause the modem and firewall aren’t configured to forward traffic to the plex server)

Manually specifying a port is only for when you have already set up a custom port forwarding rule with the chosen port. So if you didn’t actually set one then it will fail.

With that field empty the server will request a port to use from the routers UPnP system, which will be a random port the router chooses.

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