Network operators and Internet Service Providers (ISPs) still have time to test their recursive resolvers to make certain they are ready for the pending change of the cryptographic keys that help protect the Domain Name System (DNS).
Operators can use a testbed deployed by ICANN to confirm that their resolvers that have DNSSEC validation enabled will properly follow the upcoming Root Zone Domain Name Systems Security Extensions (DNSSEC) Key Signing Key (KSK) Rollover.
ICANN launched a testing platform in March 2017 that is specifically designed to allow network operators and other interested parties to confirm that their systems can handle the automated trust anchor update process for the Root Zone KSK Rollover.
To participate in the testing, network operators and ISPs join a mailing list that tells them what steps to take and when to perform these tests. It is possible to join at any point but the entire test takes about 45 days, with the most important results available about 30 days after the test begins.
Because the KSK Rollover is scheduled for 11 October 2017, we are encouraging operators of recursive resolvers with DNSSEC validation enabled to ensure that their systems are updated with the new root zone KSK configured as a trust anchor. If those systems do not support the automated trust anchor update protocol or do not implement it correctly, the trust anchor must be configured manually. If a recursive resolver's trust anchor is not updated, DNS resolution will fail for all clients using that recursive resolver causing any lookup to return a "host not found" or similar error message.
ICANN has published instructions for checking the configurations of popular recursive resolver implementations to determine if the new root zone KSK is properly configured as a trust anchor.
ICANN has also published instructions for configuring the most popular recursive resolver implementations to use the automated trust anchor protocol to stay updated with the latest root zone KSK.