Hi Benoît. Super, mystery solved. Thanks for sharing this with us.
/Peter On 17/04/2026 15.51, Benoît Panizzon wrote:
17-Apr-2026 15:44:45.348 dnssec: debug 3: keymgr: 0-31.57.161.157.in-addr.arpa done 17-Apr-2026 15:44:45.348 dnssec: error: zone 0-31.57.161.157.in-addr.arpa/IN (signed): zone_rekey:dns_keymgr_run failed: error occurred writing key to disk 17-Apr-2026 15:44:45.348 dnssec: error: zone 0-31.57.161.157.in-addr.arpa/IN (signed): zone_rekey failure: error occurred writing key to disk (retry in 600 seconds) Ok - permissions! Wow, how could I miss /etc/bind/keys belonging to root:bind with group permissions s-x Keyfiles present. name: 0-31.57.161.157.in-addr.arpa type: primary files: woody.ch.rev serial: 2007126016 signed serial: 2007126025 nodes: 31 last loaded: Fri, 17 Apr 2026 09:04:20 GMT secure: yes inline signing: yes key maintenance: automatic next key event: Fri, 17 Apr 2026 15:52:43 GMT next resign node: 20.0-31.57.161.157.in-addr.arpa/NSEC next resign time: Sun, 26 Apr 2026 04:20:25 GMT dynamic: yes frozen: no reconfigurable via modzone: no secondary has loaded signed enries. Thanks for your help and sorry that I missed something that obvious.
-- Peter Davies Support Engineer Internet Systems Corporation [email protected] 001 650-423-1460 -- Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list.

