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<p><font face="monospace">Hi Martin,<br>
In addition to the standard Kea logging facility, there is
the forensic logging <br>
hook library. <br>
<br>
You could use forensic logging and define a
"request-parser-format" and a "response-parser-format" <br>
that include the hostname.<br>
<br>
See:<a class="moz-txt-link-freetext" href="https://kea.readthedocs.io/en/latest/arm/hooks.html#libdhcp-legal-log-so-forensic-logging">https://kea.readthedocs.io/en/latest/arm/hooks.html#libdhcp-legal-log-so-forensic-logging</a><br>
<br>
/Peter</font></p>
<div class="moz-cite-prefix">On 12/05/2026 11.20, martin f krafft
via Kea-users wrote:<br>
</div>
<blockquote type="cite"
cite="mid:agLsz3UhHgOZ4HjO@lotus.rw.madduck.net">
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<meta content="width=device-width, initial-scale=1.0"
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<div class="admonition quote"
style="background-color: transparent; border-radius: 0.75em; border: 1px solid #eee; box-shadow: 0 0.2em 0.5em #999 inset, 0 0 0.0625em #999 inset; margin: 1em; overflow: hidden; padding: 0; font-size: smaller">
<p class="admonition-title"
style="text-align: justify; text-justify: auto; background-color: #eee; box-shadow: 0 0.2em 0.5em #999, 0 0 0.0625em #999; margin: 0; padding: 0.25em 0.25em 0.25em 0.5em; font-style: italic">Regarding
the following, written by “Peter Davies” on 2026-05-12 at
10:29 Uhr +0200:</p>
<blockquote
style="padding: 0 0.5em; margin: 0; font-style: italic; font-size: inherit; border-left: inherit; color: #666">
<p
style="text-align: justify; text-justify: auto; margin: 0.5em">At
debuglevel 55, the “kea-dhcp4.ddns” logger generates
messages: “DHCP4_CLIENT_HOSTNAME_DATA” and
“DHCP4_CLIENT_HOSTNAME_DATA” for<br>
DHCPOFFERs and DHCPACKs. Both of these debug messages
contain the clients<br>
hostname.</p>
</blockquote>
</div>
<p style="text-align: justify; text-justify: auto">Many thanks for
your reply!</p>
<p style="text-align: justify; text-justify: auto">I don’t quite
understand why this is debugging information, but it’s not worth
taking this further I guess…</p>
<p style="text-align: justify; text-justify: auto">Best,</p>
<div id="signature"
style="font-family: Lato, Calibri, Tahoma, sans-serif; max-width: 32em"><span
class="sig_separator" style="display: none">-- </span>
<p style="text-align: justify; text-justify: auto">martin krafft
| <a href="https://matrix.to/#/#madduck:madduck.net"
moz-do-not-send="true" class="moz-txt-link-freetext">https://matrix.to/#/#madduck:madduck.net</a></p>
<p class="blockquote"
style="text-align: justify; text-justify: auto; padding: 0 0.5em; margin: 0; font-style: italic; border-left: 2px solid #666">“distrust
all those who love you extremely<br>
upon a very slight acquaintance and without any visible
reason.”<br>
– lord chesterfield<br>
</p>
<p class="hidden"
style="text-align: justify; text-justify: auto; display: none">spamtraps:
<a href="mailto:madduck.bogus@madduck.net"
moz-do-not-send="true" class="moz-txt-link-freetext">madduck.bogus@madduck.net</a><br>
</p>
</div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
</blockquote>
<pre class="moz-signature" cols="72">--
Peter Davies
Support Engineer
Internet Systems Corporation
</pre>
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