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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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man/dnsmasq.8
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@@ -183,7 +183,8 @@ to zero completely disables DNS function, leaving only DHCP and/or TFTP.
.TP
.B \-P, --edns-packet-max=<size>
Specify the largest EDNS.0 UDP packet which is supported by the DNS
forwarder. Defaults to 4096, which is the RFC5625-recommended size.
forwarder. Defaults to 1232, which is the recommended size following the
DNS flag day in 2020. Only increase if you know what you are doing.
.TP
.B \-Q, --query-port=<query_port>
Send outbound DNS queries from, and listen for their replies on, the