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Add little documentation for DNS resolution of truncated packets. Closes #468

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abhishek
2016-07-24 18:50:20 +00:00
parent 6d8b8995b6
commit db88bed93a
1 changed files with 6 additions and 0 deletions
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6
docs/refguide.xml
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@@ -999,6 +999,12 @@ Traceroute works by sending packets with a low TTL (time-to-live) in an attempt
time with <option>--dns-servers</option> until you find one
which works.</para>
<para>This option might not be honored if the DNS response
exceeds the size of a UDP packet. In such a situation our DNS
resolver will make the best effort to extract a response from the
truncated packet, and if not successful it will fall back to
using the system resolver. Also, responses that contain CNAME aliases
will fall back to the system resolver.</para>
</listitem>
</varlistentry>