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Public Stories, etc

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 Mon, 2016-02-29 14:35 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 Wed, 2016-02-03 15:35 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 Sun, 2015-11-15 12:41 categories [ ]

OARC's TLDmon Service

OARC's TLDmon uses Nagios to monitor operational characteristics of authoritative nameservers for the Root Zone and all Top Level Domains. TLDmon checks for authoritative answers, EDNS support, lame delegations, consistent NS RR sets, open resolvers, expired RRSIGs, matching serial numbers, and TCP support. As the Domain Name System continues its evolution, it becomes increasingly important that these critical nameservers are configured correctly.
Submitted by admin on Wed, 2015-10-07 10:23 categories [ ]

2015 OARC Elections and AGM

The DNS-OARC 2015 Annual General Meeting will take place on the 3rd of October during a members-only session at the start of OARC's Fall 2015 Workshop, in Montreal, Quebec, Canada.

We are looking for nominations for candidates willing to serve a two-year term on the Board and contribute to the continued growth of OARC. The Board meets monthly, by teleconference, to review DNS-OARC operations. We expect our directors to actively contribute to the various ongoing, email based, discussions and provide oversight & feedback as needed.

Submitted by keith on Thu, 2015-07-30 18:35 categories [ ]

2015 OARC Elections

During the 2015 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 Duane Wessels (for Verisign) has served for two-years and his seat is up for election by rotation.
  • The Board seat held for Dyn by Dave Knight since April 2015 has reached the end of its two-year term, and is up for election by rotation.
    Dave will be standing for re-election.
  • The Board seat held for Afilias by Jim Galvin since October 2014 has reached the end of its two-year term, and is up for election by rotation.
    Jim will be standing for re-election.

Submitted by keith on Thu, 2015-07-30 18:17 categories [ ]

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 June 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 [ ]

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 Anonymous 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 [ ]