[dns-wg] RIPE NCC DNS operations update

Dear colleagues,

On Tuesday 3 May, we performed a DNSSEC Key Signing Key (KSK) roll-over 
for all the zones that we maintain and sign. During this roll-over, we 
dropped the Zone Signing Keys (ZSKs), and began signing the zones with 
just their new KSKs. Technically, these keys are the same as any other 
KSKs, but since they sign the entire zone, and there's no ZSK, such KSKs 
are informally known as Combined Signing Keys (CSKs).

We use Knot DNS for signing, and we enabled the "single-type-signing" 
option for our zones. We then triggered the key roll-over. Knot DNS 
waited and watched for DS record updates, and then gracefully introduced 
and withdrew keys by waiting for the appropriate amount of time as 
determined by Time To Live (TTL) values in the zones.

On Monday 9 May, a new version of the RIPE Database was deployed. This 
version communicates with our new version of Zonemaster. When users 
submit domain objects to the RIPE Database, it submits a pre-delegation 
check to Zonemaster, and only allows the update if Zonemaster returns a 
result without any errors. This new version of Zonemaster has several 
bug fixes, improved tests, and most importantly, support for the newest 
DNSSEC algorithms, algorithm 15 (ED25519) and algorithm 16 (ED448).

Regards,
Anand Buddhdev
RIPE NCC