dnsdist: Add SetReducedTTLResponseAction #12400
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chbruyand
approved these changes
Jan 10, 2023
omoerbeek
approved these changes
Jan 10, 2023
Co-authored-by: Charles-Henri Bruyand <charleshenri.bruyand+github@gmail.com>
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Short description
Reduce the TTL of records in a response to a percentage of the original TTL. For example, passing 50 means that the original TTL will be cut in half.
One use-case for this action is when dnsdist is in front of a recursor with the "refresh almost expired" feature enabled: dnsdist will then cache the packet for shorter duration than the recursor, allowing the recursor to re-fetch before the record has expired.
Related to #10600.
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