What is the rollover frequency set for the Key Signing Key in the configuration?

The rollover frequency for the Key Signing Key (KSK) is set to 730 days, which is commonly designated as a two-year time period. This length of time helps ensure a balance between security and operational efficiency. A longer rollover frequency can reduce the administrative overhead associated with managing key rotations while still providing a reasonable level of security through periodic updates.

In DNSSEC (Domain Name System Security Extensions), the KSK is crucial because it signs the Zone Signing Keys (ZSKs), which in turn sign the individual DNS records. A 730-day frequency allows for careful planning for key rotations and gives administrators time to distribute the new keys without causing service disruptions for end-users, as they can prepare for key changes well in advance.

Shorter frequencies, such as 90 days or 180 days, may increase security but could also lead to increased complexity and the potential for errors during key management, which can negatively impact DNS resolution. A 365-day frequency, though somewhat common in some contexts, does not reflect the best practice adopted by many organizations for KSK management, thus making the 730 days the most effective choice in this context.