Running BIND9 that uses TCP

[Ketil Froyn]

Jason Mitchell wrote:

> Correct me if i'm wrong, but my understanding is that BIND uses UDP by 
> default, and retries with TCP is UDP fails or it receives a truncated 
> response.

DNS uses UDP by default, a server responding to TCP only will not be 
seen by normal resolvers. Resolvers only retry with TCP if a UDP 
response is received with the truncated bit set, not when UDP fails.

Cheers,
Ketil Froyn
ketil at froyn.name
http://ketil.froyn.name/