mod_md and DNS challenge

[Clausen, Jörn <joern.clausen@xxxxxxxxxxxxxxxx>]

Hi!

Please let me know if there is a more specific list/forum where I can 
ask this question.

I am trying to use mod_md with challenge type "DNS". I have

MDCAChallenges dns-01
MDChallengeDns01 /data/acme/mod_md_worker.sh

in my config. In the error log I see, that Let's Encrypt tries to access 
the correct TXT record

DNS problem: NXDOMAIN looking up TXT for _acme-challenge....

The problem is, that the script "mod_md_worker.sh" does not seem to get 
executed at all (I have debug code in the script, and I checked using 
"strace"). I see no indication in any log, that httpd has trouble 
executing the file, it seems to ignore it completely.

I am using httpd 2.4.37 and mod_md 1.15.7.

Any idea, what I am missing here?

--
Jörn Clausen
BITS - Bielefelder IT-Servicezentrum
https://www.uni-bielefeld.de/bits

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