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Add --fast-dns-retry option.

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This gives dnsmasq the ability to originate retries for upstream DNS
queries itself, rather than relying on the downstream client. This is
most useful when doing DNSSEC over unreliable upstream network. It
comes with some cost in memory usage and network bandwidth.
This commit is contained in:
Simon Kelley
2022-08-21 18:07:17 +01:00
parent 24c3b5b3d4
commit d21438a7df
7 changed files with 166 additions and 44 deletions
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7
man/dnsmasq.8
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@@ -105,6 +105,13 @@ Dnsmasq limits the value of this option to one hour, unless recompiled.
.B --auth-ttl=<time>
Set the TTL value returned in answers from the authoritative server.
.TP
.B --fast-dns-retry=<time in ms>
Under normal circumstances, dnsmasq relies on DNS clients to do retries; it
does not generate timeouts itself. Setting this option
instructs dnsmasq to generate its own retries after the specified time, which
must be greater than 500ms. Using this option increases memory usage and
network bandwidth.
.TP
.B \-k, --keep-in-foreground
Do not go into the background at startup but otherwise run as
normal. This is intended for use when dnsmasq is run under daemontools