[dns-operations] Charter/Spectrum resolver trouble

Seth Mattinen sethm at rollernet.us
Fri Apr 9 03:48:50 UTC 2021


On 4/8/21 10:07 AM, Seth Mattinen wrote:
> Is there someone from Charter/Spectrum who is responsible for resolvers 
> 71.10.216.1 and 71.10.216.2 on here? I have a customer that's getting 
> SERVFAIL responses from those DNS servers for zones they host. All the 
> usual public DNS and other provider's DNS servers are fine.
> 

Figured out the issue; there appears to be a routing loop in AS6939 to 
prefix 68.114.45.0/24. Sending traffic out over a different transit AS 
resolves it for now.


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