Issues opening a port on AX4200 ORBI RBR750

Guru

Apr 12, 2021

> Router is 192.168.1.1 (no double-nat)

"Router" has _two_ IP addresses.

That looks like the IP address of the router's _LAN_ IP interface,
which proves nothing. What is the IP address of the router's
WAN/Internet interface? If you're worried about revealing secrets, then
the top half of the address, "a.b" out of "a.b.c.d", would satisfy most
of my curiosity.
ADVANCED > ADVANCED Home : Internet Port : Internet IP Address

Is that the address which you're using for remote access?

Plug that address into the form at: https://whois.arin.net/ , and see
if it is a public or private address.

> NAS is 192.168.1.212 (static)

Terminology: A "static" address is configured on the device itself.
What you configure on a (DHCP server on a) router is a reserved dynamic
address, not a static address. Either one should fix the address of a
device, but some implications are different.

> [...] no matter what port I'm trying to open manually (and force
> Plex/QNAP to use it) - it's not accessible from the outside.

Actual port-forwarding rule? Actual error message when you do what,
exactly?

For the usual problems with port forwarding, see:

https://community.netgear.com/t5/x/x/m-p/1859106

Nick_2021
Aspirant
Apr 12, 2021
antinode wrote:
>What is the IP address of the router's WAN/Internet interface?
ADVANCED > ADVANCED Home : Internet Port : Internet IP Address
108.56.x.x - verizon's public adress. Rotates pretty often.

antinode wrote:
>Is that the address which you're using for remote access?
>Actual port-forwarding rule? Actual error message when you do what, exactly?

yes, plex dynamically picks up the public address (while using it's own port (with checkbox unchecked) or with the one I force it to). In the pic below I'm manually assigning port 32400 (Plex's default):
https://drive.google.com/file/d/1GCrAIfG2acmEpVPIspv3QKAQrarB6Z8B/view?usp=sharing

this is the port forwarding rule from ORBI setup:
https://drive.google.com/file/d/1z6DKDwJ7d6DdgbQ23byrzp1I-HxKPjca/view?usp=sharing

antinode wrote:
>A "static" address is configured on the device itself.
What you configure on a (DHCP server on a) router is a reserved dynamic
address, not a static address. Either one should fix the address of a
device, but some implications are different.
NAS has this IP set as static and ORBI has it reserved for NAS as well:
https://drive.google.com/file/d/1nh64MuKZoH_ByHXaSg7IYKc94dgHikqT/view?usp=sharing

this is https://canyouseeme.org/ trying to ping the port:
https://drive.google.com/file/d/1XV2GN1WEwVQM0lA3DHTRTCdQ_m7xrgzA/view?usp=sharing

Thank you for your input,
Best regards,
Nick
- antinode
  Guru
  Apr 12, 2021
     I didn't spot any obvious problems in your configuration.
  
  > https://community.netgear.com/t5/x/x/m-p/1859106
  
     Did you try the tests in that list (particularly in item 3)?
  
  > ORBI is on V3.2.18.1_1.4.14 firmware.
  
     Hmmm. The latest I see is "V3.2.17.12_1.4.14". Normally, if
  everything seems right except the actual behavior, I'd suggest a
  different/older firmware version, but I'd hesitate if I couldn't return
  to the starting place.
  - Nick_2021
    Aspirant
    Apr 12, 2021
    >> ORBI is on V3.2.18.1_1.4.14 firmware.
    >Hmmm. The latest I see is "V3.2.17.12_1.4.14".
    I'm pretty sure it came with it OOB. I'm hesitant trying to go backwards. I doubt it's an issue with the new FW. As I mentioned, FiOS Gateway routers had the same issue. It does sound like an ISP block of some sort..
    
    >1. Wrong external IP address
    IP is correct from what you can see.
    
    >2. Bad port-forwarding rule
    Also, as you see - it seems correct. Pretty straightforward setup...
    
    >3. Server not listening on the port-forwarding target system.
    It's the default Plex port. It responds to it internally within LAN.
    
    >Can you access the server from a system on your LAN using the server's LAN IP address?
    Yes, as stated above the Plex server is working like a charm on LAN. All devices on LAN can play media from it using their respective apps (ios/android) or straight via browser page (IP+port). They play directly & at original quality, with no transcoding necessary.
    Devices outside LAN, however, can still connect to it via their apps, but they get the message you saw in the screenshot about 'connection is not direct blah blah' and end up getting a transcoded 720p feed of 2mpbs (plex limitation) that's routed through some proxy I guess. Plex standard behavior.
    
    >If that works, then, still from a system on your LAN, try using the router's WAN/Internet IP address. That should verify the port-forwarding rule(s) (and the "NAT loopback" feature of the router).
    Tried that: "This site can’t be reached" timeout.
    
    >4. External influences:
    >ISP blocking
    All the ports? I tried a multitude of ports... I might try talking to their support again.
    >other firewalls
    I don't have any on LAN. Can't see any FW-related settings on ORBI either...
    
    sigh...
    Thanks for your input.
    If you have any other ideas - shoot.

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Issues opening a port on AX4200 ORBI RBR750