[Pdns-users] Some issues with DNSDist version 1.1 beta

Remi Gacogne remi.gacogne at powerdns.com
Fri Dec 9 17:53:48 UTC 2016

Hi Thao,

On 12/07/2016 07:11 PM, Thao Nguyen wrote:
> Error: [string "bpf = newBPFFilter(1024, 1024, 1024)"]:1: attempt to
> call global 'newBPFFilter' (a nil value):

This means your version of dnsdist was compiled with eBPF support disabled.

> I see it require  Linux kernels (4.1+). But the last kernel in Redhat 7
> is kernel-3.10.0-327.36.3.el7.x86_64. Can I use this feature ?

I'm afraid not.

> *Issue 2: *
> showResponseLatency seen works normally. But, when I send a query with
> type "axfr", the "Average response latency" increase to very big. Does
> it is a bug?

Would you mind testing with a more recent version, because I'm pretty
sure this has been fixed by [1]? I don't think our repositories [2]
cover Red Hat though, so you might have to compile by hand.

> *Issue 3:*
> I tried to use addDeplay but I think it can not work with query "axfr"
> type. Please let me know your thought.

addDelay() only works over UDP, so as the AXFR is likely done over TCP
the delay is not going to be applied.

[2]: https://repo.powerdns.com

Best regards,

Remi Gacogne
PowerDNS.COM BV - https://www.powerdns.com/

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