LAST UPDATED: 2022-06-27
This report identifies DNS servers that have the potential to be used in DNS amplification attacks by criminals that wish to perform denial of service attacks.
The DNS servers are checked with a command equivalent to:
For more details behind the scan methodology and a daily update of global DNS scan statistics please visit our dedicated DNS scan page.
You can learn more on the report in our DNS Open Resolvers Report tutorial.
You can learn more on our reports in general in our Overview of Free Public Benefit Shadowserver Reports presentation, which also explains example Use Cases.
For more information on our scanning efforts, check out our Internet scanning summary page.