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DNS Statistics Collector (DSC) is a tool used for collecting and exploring statistics from busy DNS servers. It can be set up to run on or near nameservers to generate aggregated data that can then be transported to central systems for processing, displaying and archiving. Together with dsc-datatool the aggregated data can be furthur enriched and converted for import into for example InfluxDB whic
2023-06-01: This service has been deprecated in favor of Check My DNS. Recent increases in DNSSEC deployment are exposing problems with DNS resolvers that cannot receive large responses. The maximim reply size between a DNS server and resolver may be limited by a number of factors: If a resolver does not support the Extension Mechanisms for DNS (EDNS), replies are limited to 512 bytes. The resolve
2023-06-01: This service has been deprecated in favor of Check My DNS. US-CERT's Vulnerability Note VU#800113 describes deficiencies in the DNS protocol and implementations that can facilitate cache poisoning attacks. The answers from a poisoned nameserver cannot be trusted. You may be redirected to malicious web sites that will try to steal your identity or infect your computers with malware. Wor
2023-06-01: This service has been deprecated in favor of Check My DNS. The announcement in Jul 2008 of CERT VU#800113 made it clear that resolvers should use random source source ports when sending queries. Here at OARC, we crafted a special DNS name and server that you can query to learn whether or not your own resolver is using random ports. Use a DNS query tool such as dig to ask for the TXT re
The DNS Operations, Analysis, and Research Center (DNS-OARC) brings together key operators, implementors, and researchers on a trusted platform so they can coordinate responses to attacks and other concerns, share information and learn together. DNS-OARC has five key functions: Information Sharing. DNS-OARC provides a trusted, shared platform to allow the DNS operations community to share informat
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