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DNS Cache Eviction

Definition

Flushing DNS to clear any IP addresses or other DNS records from the cache.

Synonyms: Flush DNS Cache .

How it works

Flushing the DNS Cache will clear the IP addresses of websites you have visited recently. This can help remediate DNS Cache Poisoning attacks, which is a type of cyber attack where corrupted DNS data is inserted into the cache, causing redirects to malicious websites.

On windows, the DNS cache can be wiped by issuing the command ipconfig /flushdns.

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References

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Internet Article

The following references were used to develop the DNS Cache Eviction knowledge-base article.

(Note: the consideration of references does not imply specific functionality exists in an offering.)

Eviction Guidance for Networks Affected by the SolarWinds and Active Directory/M365 Compromise

Reference Type: Internet Article Organization: CISA

Source: https://www.cisa.gov/news-events/analysis-reports/ar21-134a

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