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chore(docs): regenerate man pages (#7971)

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Ville Vesilehto
2026-03-27 05:35:09 +02:00
committed by GitHub
parent 49b18b8af6
commit 0132ad86b5
60 changed files with 2110 additions and 280 deletions
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man/coredns-bufsize.7
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@@ -1,14 +1,20 @@
.\" Generated by Mmark Markdown Processer - mmark.miek.nl
.TH "COREDNS-BUFSIZE" 7 "March 2021" "CoreDNS" "CoreDNS Plugins"
.TH "COREDNS-BUFSIZE" 7 "March 2026" "CoreDNS" "CoreDNS Plugins"
.SH "NAME"
.PP
\fIbufsize\fP - sizes EDNS0 buffer size to prevent IP fragmentation.
\fIbufsize\fP - limits EDNS0 buffer size to prevent IP fragmentation.
.SH "DESCRIPTION"
.PP
\fIbufsize\fP limits a requester's UDP payload size.
\fIbufsize\fP limits a requester's UDP payload size to within a maximum value.
If a request with an OPT RR has a bufsize greater than the limit, the bufsize
of the request will be reduced. Otherwise the request is unaffected.
It prevents IP fragmentation, mitigating certain DNS vulnerabilities.
It cannot increase UDP size requested by the client, it can be reduced only.
This will only affect queries that have
an OPT RR (EDNS(0)
\[la]https://www.rfc-editor.org/rfc/rfc6891\[ra]).
.SH "SYNTAX"
.PP
@@ -22,7 +28,7 @@ bufsize [SIZE]
.PP
\fB[SIZE]\fP is an int value for setting the buffer size.
The default value is 512, and the value must be within 512 - 4096.
The default value is 1232, and the value must be within 512 - 4096.
Only one argument is acceptable, and it covers both IPv4 and IPv6.
.SH "EXAMPLES"
@@ -34,7 +40,7 @@ Enable limiting the buffer size of outgoing query to the resolver (172.31.0.10):
.nf
\&. {
bufsize 512
bufsize 1100
forward . 172.31.0.10
log
}
@@ -50,7 +56,7 @@ Enable limiting the buffer size as an authoritative nameserver:
.nf
\&. {
bufsize 512
bufsize 1220
file db.example.org
log
}
@@ -61,7 +67,5 @@ Enable limiting the buffer size as an authoritative nameserver:
.SH "CONSIDERATIONS"
.IP \(bu 4
Setting 1232 bytes to bufsize may avoid fragmentation on the majority of networks in use today, but it depends on the MTU of the physical network links.
.IP \(bu 4
For now, if a client does not use EDNS, this plugin adds OPT RR.