Allowing DNS to listen only on UDP

[Reindl Harald]

Am 21.04.2017 um 12:55 schrieb Harshith Mulky
> Is there a easy way to turn off/ Disable the DNS server to stop 
> listening the requests over TCP and turn it ON whenever required?

no and it does not make sense at all

tcp is required for:

* zone transfers
* EDNS

if it ain't broken don't fix it