The DNSX family is Xelerance's appliance line for DNSSEC.
The DNSX Secure Signer is an appliance to create and maintain DNSSEC signed domains, and
includes key management, automatic key rollover, and can be deployed as
stand-alone signer appliance or as a hidden primary nameserver.
The DNSX Secure Resolver is its counterpart. It is a DNSSEC validating recursive resolver.
It features key management using a service to keep TLD keys up to date while
the root is not yet signed, handles internal domain keys, and allows to
enable DNSSEC Lookaside Verification servers. It can be used as a front-end
to existing non-secure resolvers.