Hi Zak,
PowerDNS Authoritative Server with mariadb/mysql backend is vulnerable
to ddos attacks:
github.com
DDoS attack with random A requests causes SQL backend overload · Issue
#11784 · PowerDNS/pdns <#>
Hi, Program: Authoritative Issue type: Feature request Short description
DDoS attack with random A requests causes SQL backend overload The zone
cache feature is only caching the "domains" table, it's not caching the
each record in the b...
🔗 https://github.com/PowerDNS/pdns/issues/11784
<https://github.com/PowerDNS/pdns/issues/11784>
Other back-ends may suffer from this issue, except LMDB.
On 10/31/25 4:57 PM, Zakaria via Pdns-users wrote:
Hi All,
I have one question and wonder if anyone has answer for, and here is
the context first.
I have been using PowerDNS, without database backend but just plain
bind db text files.
I noticed my powerdns server setup is exceptionally fast when I
benchmark, in case for records anyone is interested, you can check
results out here:-
https://zakaria.website/dnsbenchmark.png
I wondered if I switch to DB, would it hinder performance? This my
question, Does database like mysql and ldap get dns entries get cached
and in which format? is it like bind format in db text files?
Looking forward.
With thanks.
Zak.
--
Best regards,
Adrian Minta
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