VZW LG G4 UDP Ports 32000-36999 Blocked!? - G4 Q&A, Help & Troubleshooting

I Sim Race on my PC and use my phone as a secondary display for timing, gauges, etc...
Trying a new android app that just won't work. After a lot of research and testing, I've found that my Verizon LG G4 will transmit via UDP no problem, however, when my PC (or my wife's phone) sends UDP traffic to the G4 between ports 32000-36999, the packets get blocked.
I have searched far and wide for some possible answers, to no avail. Force stopped or uninstalled any apps that I think would use UDP (like spotify)... still no joy. Can't find any android apps that use that port range, how else can I free up a port in that range or figure out what's using/blocking it?
Thank you

It's gotta be either android specific (5.1) or software related, because my wife's S6 blocks the same port range.
No ideas?

And this happens even in airplane mode with WiFi on, so it's not VZ blocking them.

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Tether to Replace Home Internet - Closed Port Issue

I want to start out by stating this may be a general Verizon issue, but was hoping to get some input here first on the issue I'm facing.
My situation is that I want to replace my home cable internet with my LG G4 via tethering. I installed a wireless card on a desktop computer, connected it to VZW network via wifi tethering from the G4, enabled connection sharing on the desktop computer, then plugged an Ethernet cord from the desktop into the WAN port of my home firewall/router. This worked perfectly, giving the rest of my home devices internet via my 4G connection!
However I have some externally facing services, such as VPN and RD Gateway that don't seem to work over the 4G connection. I've done some troubleshooting and have a suspicion inbound communication on these ports is possible blocked by Verizon.
Sidenote - these services are configured with a Dynamic DNS provider - the external IP address does change correctly when I cutover to 4G service.
I reverted my home network back to the way it was and started focusing on the G4. I played with iptables (I'm rooted) with no luck. I attempted to open ftp connection to the G4 on port 2221 with no luck (using FTPServer & FTP Server Plus apps), still nothing. I changed the port a few times to something random > 1032, still nothing.
Does anyone know if Verizon is blocking external inbound communication, or possibly if there is something on the G4 I'm overlooking?
Any information is appreciated! If I can get through this issue, I can cut my ties to Comcast!!
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Does Bluetooth tethering work from a Sprint Galaxy S8?

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Is Sprint putting out a signal to not allow this?
I have not rooted these last two devices because I need the security. I run much of my company through these devices and can't risk it. But being able to tether, even just Bluetooth or USB would help these aging peepers.
Sent from my Pixel C using XDA-Developers Legacy app

Wi-Fi authentication - not working on GoGo in flight Wi-Fi service

OK, so I've got a VERY strange one for y'all.
First off, I had this problem on Nougat. That's what prompted me to follow instruction on here and upgrade to Oreo and try. Yeah, that failed too.
So right now I have no problems at all connecting to any Wi-Fi router at home, my friends, in-laws, etc. Even when we go to restaurants and connect, like Bob Evans, Denny's, etc. where it asks you to accept the terms of service.. no problems.. at all!!
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What's worse, is I've contacted GoGo Wi-Fi's tech support chat. They are determined to tell me there's something wrong with the phone.
Can someone please help me figure this out? I used to work in an IT department for the state government, and I should be able to keep up with whatever you ask.
Thanks a TON in advance!!
Some specifics:
Moto Z2 Force (T-Mobile)
Rooted with Magisk (but had the issue when it was bone stock on Nougat)
Android 8.0.0
Baseband M8998TMO_20207.117.02.41R NUS
Kernel 4.4.78-perf-g6174029
Build OCX27
SSID of the affected network - gogoinflight
I'm flying 3 hops tomorrow and I can get you as much detail as you'd like, I just need to know what.
nothing!?

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