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-rw-r--r--man/dnssec-trust-anchors.d.xml4
1 files changed, 4 insertions, 0 deletions
diff --git a/man/dnssec-trust-anchors.d.xml b/man/dnssec-trust-anchors.d.xml
index 9a7cf3c881..5f15d7cd59 100644
--- a/man/dnssec-trust-anchors.d.xml
+++ b/man/dnssec-trust-anchors.d.xml
@@ -175,6 +175,10 @@
<para><ulink url="https://tools.ietf.org/html/rfc7646">RFC
7646</ulink> for details on negative trust anchors.</para>
+
+ <para>If no negative trust anchor files are configured a built-in
+ set of well-known private DNS zone domains is used as negative
+ trust anchors.</para>
</refsect1>
<refsect1>