Named issues with T-Mobile 5G for Business

[Philip Prindeville]

> On Jan 6, 2026, at 1:02 AM, Marco Moock <mm at dorfdsl.de> wrote:
> 
> Am 05.01.2026 um 16:29:07 Uhr schrieb Philip Prindeville via bind-users:
> 
>> Since I switched over from Sparklight (DOCSIS MSP) to T-Mobile (5G)
>> I've had a world of hurt including timed out inbound and outbound
>> connections, as well as DNS failures:
> 
> I don't see why BIND is the issue there.
> Be aware that mobile carriers often use CGNAT for IPv4 and that devices
> are often overloaded because of too much traffic.
> For UDP (DNS uses that by default) that means the packets are being
> dropped and no one notices that, compared to TCP.
> 
> 

I have a static, routable address.  So no NAT.