I have some orbi 850's i need to change the DNS rebinding to allow a domain.Support is zero as its out of warrenty. I cannot find any settings about DNS rebinding protection. Help please. Someone esle asked this a few years ago and got nowhere as again they were out of warrently !

RedRocket204 wrote: CrimpOn I do realize your post is from two months ago, hoping you still might have an interest in this issue from the OP. What the OP is referring to is utilizing a Plex server on your private network to download/transfer content from the Plex server to a mobile device, like an iPad that is also on the same private network. I was drawn to the specific question of what control the user has over DNS Rebind Protection on Orbi routers, which is zero. There is no user setting. However, I sense a different factor may be involved. Is the Plex server perhaps connected to an Ethernet switch that is connected to the Orbi router? At first, the primary question seems absurd. A Plex server and a user device are on the same private network. That seems to be "what Plex is designed for." How could the user device be unable to stream/download content? I could see issues where the user device is remote (on the internet somewhere), but on the same network? No way. Just by accident, I discovered that some Ethernet switches implement IGMP Snooping, but do not do it very well. When that happens, user devices lose access to media servers that are connected behind a switch. I would tend to look toward Plex resources to resolve LAN connection issues, such as: https://support.plex.tv/articles/200430283-network/

Thanks for the information. Makes perfect sense to me. Totally reasonable thing to do. The DGS-108 actually does have IGMP snooping: https://us.dlink.com/en/products/dgs-108-8-port-unmanaged-gigabit-metal-desktop-switch I searched Amazon looking for a switch that does not include IGMP snooping. The Netgear GS-308 is inexpensive. The Netgear data sheet does not mention IGMP snooping, but the Amazon description does. (Who to believe: the manufacturer or Amazon?) Would Plex have an option to transcode the video file to lower resolution/bandwidth, store that version under a different name, and then download the smaller file? Or, is it downloading anything that fails?

There are settings to specify which DNS servers the Orbi will use to resolve URLs into IP addresses. There are no setting specifically addressing how the Orbi handles malicious attempts at "DNS Rebinding" https://en.wikipedia.org/wiki/DNS_rebinding Perhaps more detail about the problem will help. What, specifically, is the goal? For example, if the goal is to set up a local domain so that devices on the LAN can be referred to by URL rather than IP address, the Orbi DNS software does not provide for this. I use a Pi-hole server to perform this function to access the web server on my printer. i.e. rather than http://192.168.1.4, I can browse to http://printer.local

Bascically the dns rebinding protection is killing a feature of plex. The solution for almost ever other ap / router is to allow one domain in rebinding settings. Which you have now confirmed that NG dont have. So £1000 of mesh hardware is rendered obsolute due to a setting not being implimented. Guess lesson learnt, dont buy NG again.

Oh, geez. I have not run across that Plex feature problem yet. Can you point me to a reference on the issue?

DNS Rebinding & Permitting a private domain

12 Replies

CrimpOn
Guru - Experienced User
Apr 23, 2022

There are settings to specify which DNS servers the Orbi will use to resolve URLs into IP addresses.

There are no setting specifically addressing how the Orbi handles malicious attempts at "DNS Rebinding"

https://en.wikipedia.org/wiki/DNS_rebinding

Perhaps more detail about the problem will help. What, specifically, is the goal?

For example, if the goal is to set up a local domain so that devices on the LAN can be referred to by URL rather than IP address, the Orbi DNS software does not provide for this. I use a Pi-hole server to perform this function to access the web server on my printer.

i.e. rather than http://192.168.1.4, I can browse to http://printer.local
- Smurf_paul
  Aspirant
  Apr 23, 2022
  Bascically the dns rebinding protection is killing a feature of plex. The solution for almost ever other ap / router is to allow one domain in rebinding settings. Which you have now confirmed that NG dont have. So £1000 of mesh hardware is rendered obsolute due to a setting not being implimented.
  
  Guess lesson learnt, dont buy NG again.
  - CrimpOn
    Guru - Experienced User
    Apr 23, 2022
    Oh, geez. I have not run across that Plex feature problem yet. Can you point me to a reference on the issue?

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DNS Rebinding & Permitting a private domain