blackhole option anomaly

[Ondřej Surý]

Hi,

please fill the issue in our GitLab: https://gitlab.isc.org/isc-projects/bind9/-/issues/new?issuable_template=Bug

Thank you,
--
Ondřej Surý — ISC (He/Him)

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> On 15. 2. 2022, at 18:21, Thib D <thibmac0241 at gmail.com> wrote:
> 
> 
> Hello,
> 
> I am currently rolling a few of my servers from 9.16.25 to 9.18.0 and I'm having a few issues : 
> 
> For context, my test setup is basically a primary server transferring all of its zones through standard AXFR to a secondary BIND server on a different IP. Both servers are running the same Bind version.
> 
> After rolling the 9.18.0 on both servers, I saw these anomalies :
> 
> the primary stopped sending notify queries to the secondary server at each zone reload
> the secondary server was able to resolve AXFR queries to the primary, but :
> rndc commands like "refresh" or "retransfer" were not interpreted and the zone.
> After the "refresh" timer set in the SOA expired, the zone would not update on the secondary either.
> Meanwhile there was no log hinting at a misconfiguration, which made the debugging and understanding quite tricky. 
> 
> The only fix I found was to comment that particular line in the config : 
> 
>> blackhole { none; };
> 
> Correct me If I'm wrong, but there is no mention of any change for this option, other than this bugfix from the early 9.17 : https://gitlab.isc.org/isc-projects/bind9/-/issues/1936
> 
> Using actual random IP's in the blackhole field also fixed the issue and re - enables the zone transfers.
> 
> After some digging, it looks like the issue appeared in Bind 9.17.19 
> 
> Hope it helps,
> Thanks
> Thibaud.
> 
> 
> 
> 
>  
> 
> 
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