ATT BGW320-500 Gateway WAN IP Address

Plex Media Server Remote Access
1

Server Version#:1.43.1.10611
Player Version#:4.159.0

I just got ATT fiber two days ago. I setup the BGW320 gateway to passthrough to my ASUS router. (RT-AX86U) The assigned WAN IP address is 172.12.x.x. I’ve carefully checked all settings on the gateway. I’m having issues with remote access. I’m thinking I have a Double NAT but I’m not sure. ATT says this IP is Public and should not cause any issues. I’m thinking Plex doesn’t agree.

Is this a private or public IP address?

What can I do about it. ATT support says it’s not their issue.

2

It’s a public address. Private addresses range for that block is 172.16.x.x - 172.31.x.x

At&t’s generic “internet security” has been known to not allow remote access to work if you have that enabled

3

OK, that’s good. What do I do?

4

I have AT&T Fiber and I tuned off their “AT&T Active Armor internet Security” from their Smart Home Manager app. I turned it off a very long time ago so I don’t know if it is still needed. It could be multiple things but you may want to give that try if you’ve already done things like port forwarding, changing DNS etc.

5

My Active Armor is not activated.

Regarding port forwarding, do I have to setup that up on the ATT gateway? Or are you talking on my router? It’s all set on my router.

MY DNS is server is Cloudflare.

6

Did you set the ATT for IP Passthrough so it essentially acts as a modem for the router? (If not it will be doublenat)

If you search google for something like “BGW320 put in passthrough” you should find instructions

7

Yes, I have the gateway setup for passthrough. I’m almost certain it is setup properly.

My router and gateway have the same IP address. Is that correct? How can I tell if I’m double nat’d?

8

I looked at your account and remote access looks fine. In your Asus Router the WAN address should be the same 172.12.x.x WAN address. If that is the case that is not a doublenat issue and it is some other problem.

Your plex security cert looks fine.

Possibly DNS issues I suppose. May want to change to Google DNS or Cloudflare public DNS

9

OK.

Do I have to set any NAT/Gaming parameters on Gateway?

I’m talking here:

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I can’t enter : “Needed by Device” field. It says No device found.

10

not if you already have things port forwarded.

11

You need to configure port forwarding in the ASUS router and in Plex Media Server.

You can use either automatic (UPnP) or manual port forwarding.

Automatic Port Forwarding
Enable UPnP in the Asus router.
In Plex Settings → Remote Access, do not check the “Manually specify public port” box.
When you enable remote access, Plex will negotiate the port number with the router. If successful, you will see “Fully accessible” and public_address:public_port. The port number will most likely not be 32400.


Manual Port Forwarding

See screenshot below from an RT-AC68U. From what I found on the Internet, the RT-AX86U looks the same.

Asus Port Forward

  • Service Name: Anything
  • External Port: Default 32400. Can change if desired. Must match manually specified port in Settings → Remote Access.
  • Internal Port: Always 32400.
  • Internal IP Address: IP address of the Plex Media Server.
  • Protocol: TCP
  • Source IP: Blank. You want to permit all remote IP addresses, since you will not always know the remote client’s address (ex: mobile phone).

Plex Settings → Remote Access:

  • You must check the box to Manually specify public port, even if using the default 32400.
  • The port number must match the external port in the Asus router.

ASUS RT-AC68U:

portforward
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12

I have port forwarding on my ASUS router. It worked great with Spectrum modem. So I don"t need this NAT/Gaming setup on the ATT gateway? I’m still confused.

13

Then you can ignore my post above.

14

You do not. The passthrough essentially put’s it the ATT in bridge mode for that one device ( the router) so it behaves like a Modem for the Asus router.

15

Should this be on or off? (asus router)

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16

On. Otherwise port forwarding will not work.

17

I have no idea how it was changed to off, because it worked great with the spectrum modem.

18

Who knows. Maybe an ASUS s/w update reset it somehow.

Be sure to fill out the rest of the port forward (the internal port is blank in your screenshot, must be 32400).

19

Thank you.