DOT & IoT Devices

[CaptainSTX]

Recently I no longer could stream Amazon Prime video on my smart TVs and Roku devices. The error message was that the TV or device was not connected to the internet. Not accurate as Netflix, YouTube, etc. were all working fine. Made no difference if the device was connected by Ethernet or Wi-Fi to the LAN.

Apparently, Amazon determines if it is connected by trying to contact a DNS server coded into the application's firmware. As I was using DOT this attempt to check for connectivity failed. Once I enabled the DNS Director, input the device's MAC for each streaming device and selected 8.8.8.8 as the DNS for these devices the problem went away.

As time permits, I plan to try this for other problematic IoT devices including my Amazon Spots.

There are probably other things that could be done such as not using DOT or changing the most restrictive DOT settings which would accomplish the same thing but for those individuals having problem connecting various devices to their network it is another possible solution that can be tried.

 

[DJones]

I use cloudflares DoT using strict. I also don’t permit my ISP’s dns.

I normally just block 8.8.8.8 since it’s hardcoded into so many devices. And set global redirection to router in dns director.

I don’t seem to have issues with my 2024 LG smart tv or Amazon devices such as firesticks or echo devices.

I do get plenty of firewall logs from these hardcoded devices for blocking googles dns but I think the fallback is to use the routers dns instead of just failing to connect. I haven’t inspected these devices in depth so they could be doing something else.

 

[OzarkEdge]

I am unable to setup (connect first time) wireless Wyze cams if using DoT. I was toggling DoT OFF for Wyze setup and then back ON. Now I use the same DNS but without DoT for my IoT VLAN... a first pass configuration until I gain more insight into what's the best general configuration for an IoT VLAN.

OE