[Pdns-dev] change qname before send query to authoritative server through pdns-recursor
pieter.lexis at powerdns.com
Tue Aug 22 16:36:04 UTC 2017
On Mon, 21 Aug 2017 13:58:24 +0000 (GMT+00:00)
"Cheung, Kein-Wai" <kwcheung at pccwglobal.com> wrote:
> I would like to know if POWERDNS scripting solution (using LUA) it's able
> to :
> During the Interception of a Query:
> . Grab the qname (dq.qname)
> . Compare it or analyse it with some LUA string methods
> . Depend of the results, modify the dq.qname
> . That qname will be send to the Authoritative server for query
> searching and response.
It is not possible to directly change the QNAME. However, is it possible to add a CNAME record to another name via dq.followupDomain and set dq.followupFunction to followCNAMERecords.
The QName of the query can be inspected in either 'DNSName'-form or strings (by calling :toString()).
Hope this helps!
1 - https://doc.powerdns.com/recursor/lua-scripting/dq.html#DNSQuestion.followupFunction.
2 - https://doc.powerdns.com/recursor/lua-scripting/hooks.html#cname-chain-resolution
3 - https://doc.powerdns.com/recursor/lua-scripting/dnsname.html
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