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Set the default maximum DNS UDP packet size to 1232.

Browse Source 
http://www.dnsflagday.net/2020/ refers.

Thanks to Xiang Li for the prompt.
This commit is contained in:
Simon Kelley
2023-03-07 22:07:46 +00:00
parent 9a698434dd
commit eb92fb32b7
3 changed files with 11 additions and 3 deletions
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@@ -7,8 +7,15 @@ version 2.90
domain are configured, but no server which is not qualified
for a particular domain. Thanks to Daniel Danzberger for
spotting this bug.
Set the default maximum DNS UDP packet sice to 1232. This
has been the recommended value since 2020 because it's the
largest value that avoid fragmentation, and fragmentation
is just not reliable on the modern internet, especially
for IPv6. It's still possible to override this with
--edns-packet-max for special circumstances.
version 2.89
Fix bug introduced in 2.88 (commit fe91134b) which can result
in corruption of the DNS cache internal data structures and