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Add logging to your dhcpd.conf. Here is what I use:<br>
<font color="#993300"><tt>on commit {</tt><tt><br>
</tt><tt> if static {</tt><tt><br>
</tt><tt> set is-static = " --> STATIC";</tt><tt><br>
</tt><tt><br>
</tt><tt> option dhcp-renewal-time = encode-int(43200 /
2, 32); # 43200 = 12 hours</tt><tt><br>
</tt><tt> option dhcp-rebinding-time = encode-int(43200
* 7 / 8, 32);</tt><tt><br>
</tt><tt> ddns-ttl = encode-int((43200 / 2) + 1,
32);</tt><tt><br>
</tt><tt> } else {</tt><tt><br>
</tt><tt> set is-static = "";</tt><tt><br>
</tt><tt><br>
</tt><tt> option dhcp-renewal-time =
encode-int(lease-time / 2, 32);</tt><tt><br>
</tt><tt> option dhcp-rebinding-time =
encode-int(lease-time * 7 / 8, 32);</tt><tt><br>
</tt><tt> ddns-ttl = encode-int((lease-time / 2)
+ 1, 32);</tt><tt><br>
</tt><tt> }</tt><tt><br>
</tt><tt><br>
</tt><tt></tt><tt> log ( info,</tt><tt><br>
</tt><tt> concat (</tt><tt><br>
</tt><tt> "Host:", pick-first-value(option
fqdn.hostname, option host-name, "(none)"), "=>",
pick-first-value(config-option server.ddns-hostname, "(none)")</tt><tt><br>
</tt><tt><br>
</tt><tt> ," VendorId:", pick-first-value(option
vendor-class-identifier, "(none)")</tt><tt><br>
</tt><tt><br>
</tt><tt></tt><tt> ," Lease:",
pick-first-value(binary-to-ascii(10,32,"",encode-int(lease-time,32)),
"(none)")</tt><tt><br>
</tt><tt> ," Renewal:",
pick-first-value(binary-to-ascii(10, 32, "", config-option
dhcp-renewal-time), "(none)")</tt><tt><br>
</tt><tt> ," Rebind:",
pick-first-value(binary-to-ascii(10, 32, "", config-option
dhcp-rebinding-time), "(none)")</tt><tt><br>
</tt><tt><br>
</tt><tt> ," TTL:",
pick-first-value(binary-to-ascii(10, 32, "", config-option
server.ddns-ttl), "(none)")</tt><tt><br>
</tt><tt><br>
</tt><tt> ," GIaddr:",
pick-first-value(binary-to-ascii(10, 8, ".", packet(24,4)),
"(none)")</tt><tt><br>
</tt><tt> , is-static</tt><tt><br>
</tt><tt> )</tt><tt><br>
</tt><tt> );</tt><tt><br>
</tt><tt>}</tt><tt><br>
</tt></font><br>
Bill<br>
<br>
<br>
<div class="moz-cite-prefix">On 10/19/2017 3:00 AM, Narcis Garcia
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:46e6c16a-695b-8cb7-ccaf-468a85db5b56@actiu.net">
<pre wrap="">isc-dhcp-server is currently logging in my system:
DHCPDISCOVER from 11:22:33:44:55:66 via eth0
DHCPOFFER on 172.16.20.201 to 11:22:33:44:55:66 via eth0
DHCPREQUEST for 172.16.20.201 from 11:22:33:44:55:66 via eth0
DHCPACK on 172.16.20.201 to 11:22:33:44:55:66 via eth0
How can I make the service logs some name about that known client? (such
as "printer_1")
Thanks.
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</pre>
</blockquote>
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