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Public Stories, etc

Root Zone Archive

With the assistance of its members and friends (especially AFNIC, RIPE, Paul Vixie, Peter Koch and Paul Hoffman) DNS-OARC has assembled a historical archive of the DNS root zone dating back to July 1999. This Root Zone Archive is a part of our larger project, the Zone File Repository.

Root Zone Trends

The following graph shows trends in the contents of the root zone:

Submitted by admin on Tue, 2015-07-07 12:16 categories [ ]

DNS Statistics Collector (DSC) - FAQ - What It Is, and Why You Should Run It! (More...)

What is DSC?

DSC is an application for collecting and analyzing statistics from busy DNS servers. The application may be run directly on a DNS node or may be run on a standalone system that is configured to "capture" bi-directional traffic for a DNS node. DSC captures statistics such as: query types, response codes, most-queried TLDs, popular names, IPv6 root abusers, query name lengths, reply lengths, and much more. These statistics can aid operators in tracking or analyzing a wide range of problems including: excessive queriers, misconfigured systems, DNS software bugs, traffic count (packets/bytes), and possibly routing problems.

Submitted by admin on Mon, 2015-07-06 19:11 categories [ ]

DSC - DNS Stats Collector

DSC (originally developed by The Measurement Factory and now developed by DNS-OARC) is a system for collecting and exploring statistics from busy DNS servers. It uses a distributed architecture with collectors running on or near nameservers sending their data to one or more central presenters for display and archiving. Collectors use pcap to sniff network traffic. They transmit aggregated data to the
presenter as XML data.

dsc is configurable to allow the administrator to capture any kind of data that he or she chooses. A sample configuration is included that captures the following data:

  • Query types
  • Response codes
  • Opcodes
  • Source addressess or subnets
  • Query name TLD
  • EDNS parameters
  • Known types of DNS "pollution"
Submitted by admin on Mon, 2015-05-11 18:37 categories [ ]

Software Engineer Job Description

Software Engineer


The Domain Name System Operations Analysis and Research Center (DNS-OARC) is a non-profit, membership organization that seeks to improve the security, stability, and understanding of the Internet's DNS infrastructure.

Submitted by dalini on Wed, 2015-04-01 08:14 categories [ ]

OARC 2015 Spring Workshop (Amsterdam)

DNS-OARC's Spring 2015 Workshop will take place co-located with the RIPE70 meeting at the Hotel Okura in Amsterdam, sponsored by SIDN, Verisign and Nominum on the 9th and 10th of May.

Submitted by keith on Fri, 2015-03-13 20:02 categories [ ]


DNSdump is a Perl script which capture and displays DNS mesages, much like tcpdump would, but purpose built. However, dnsdump does not currently support DNS over TCP.

DNSdump can be obtained from the Measurement Factory:

Submitted by admin on Fri, 2015-02-06 13:28 categories [ ]

OARC Data Catalog

One of OARC's functions is to collect and archive DNS-related data from its members. This data is available to members for research and operational use. Some of OARC's data is available through the secure member's portal. Other data is available via shell access from a read-only file server.

Members that require access to data must adhere to the guidelines outlined in the OARC Membership and Data Access Agreement.

Real-Time DSC Data

Submitted by admin on Thu, 2014-12-11 20:05 categories [ ]

OARC 2014 AGM Board Election Results

The following candidates were re/elected to the OARC Board for 2-year terms:

  • George Michaelson (APNIC)
  • Ondrej Filip (CZ.NIC)
  • John Crain (ICANN)

OARC welcomes and congratulates the new Board members on their successful election.

We thank the unsuccessful and withdrawn candidates:

  • Don Blumenthal (PIR)

  • Merike Kaeo (IID)
  • Mehmet Akcin (Microsoft)

for their willingness to consider serving on OARC's Board.

We also want to express a special thanks to our outgoing Board members Antoin Verschuren and Matt Pounsett for their years of service and energetic contribution to OARC.

Submitted by keith@ on Mon, 2014-10-13 18:50 categories [ ]

OARC Fall 2014 Workshop (Los Angeles)

DNS-OARC is pleased to announce the agenda for its 2014 Fall Workshop and Member AGM which will take place in Los Angeles, California, USA on the 11th through 13th October.

This will be held in co-operation with the ccNSO Tech Day of the subsequent ICANN51 meeting. The OARC AGM and member-only session will be held on Saturday 11th October, the main workshop on Sunday 12th, and a joint session with ICANN's Tech Day on Monday 13th.

Submitted by keith@ on Wed, 2014-09-24 14:13 categories [ ]

2014 OARC Elections

During the 2014 OARC Annual General Meeting we will be electing three seats on the OARC Board of Directors. The seats becoming available are doing so on the following basis:

  • Existing Board member Antoin Verschuren's (SIDN) two-year term has ended.
    Antoin will not be standing for re-election.
  • Existing Board member Ondrej Filip's (CZ.NIC) two-year term has ended.
    Ondrej will be standing for re-election.
  • Existing Board member John Crain's two-year term has ended. This seat was originally appointed as the Root Operator's representative, but was converted last year to an at-Large elected position, and John is re-standing for election representing ICANN on this new basis.
Submitted by keith on Thu, 2014-09-18 19:59 categories [ ]