[Pdns-users] How to force recursions to TCP only

[Kevin P. Fleming]

I don't think there are any configuration options in the recursor do to this, so you'll have to do it in a firewall system outside of the recursor. Blocking all outbound traffic to UDP port 53 would take care of it.

On Fri, Feb 28, 2025, at 06:45, Carlos N via Pdns-users wrote:
> Hello all
> 
> I,m looking for a way of forcing all outgoing queries from recursor to authoritative servers to be TCP.
> I'm experiencing some packet discards in my platform internal network and i think forcing to TCP may help overcome some of the problems caused by discards.
> Does anybody know how to do this or if it is even possible.
> Documentation doesn't give any clue.
> Kind regards and thanks in advance.
> 
>      Carlos
> 
> 
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