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  • Verisign Labs are kindly hosting a test zone on a server (running a patched version of NSD):
    • The zone is named and it has A, AAAA, and TXT records for names from 'L001' to 'L100'. 

    • The IP address of the server is currently

    • Server key file is available to download here: nsd.key

    • The zone is signed

    • This server also supports TCP fast open

Authoritative servers [currently offline]

  • The authoritative servers for are running a patched version of NSD:
  • IP address: and 2a04:b900:0:100::37
  • The server key file is available for download here:
Server typeHosted byIP addressesServer keyHostname for TLS authentication


AuthoritativeVerisign Labs173.255.254.151nsd.key [Note that this

is a self-signed certificate so does not pass

authentication by default.]