<font size=2 face="sans-serif"><br>
Durwin F. De La Rue<br>
Management Sciences, Inc.<br>
6022 Constitution Ave. NE<br>
Albuquerque, NM 87110<br>
Phone (505) 255-8611</font>
<br>
<br><tt><font size=2>"dhcp-users" <dhcp-users-bounces@lists.isc.org>
wrote on 09/22/2016 12:22:55 PM:<br>
<br>
> From: Rick Dicaire <kritek@gmail.com></font></tt>
<br><tt><font size=2>> To: Users of ISC DHCP <dhcp-users@lists.isc.org></font></tt>
<br><tt><font size=2>> Date: 09/22/2016 12:24 PM</font></tt>
<br><tt><font size=2>> Subject: Re: DHCP server to handle hostname.</font></tt>
<br><tt><font size=2>> Sent by: "dhcp-users" <dhcp-users-bounces@lists.isc.org></font></tt>
<br><tt><font size=2>> <br>
> Here's something I use when hosts don't send a hostname.</font></tt>
<br><tt><font size=2>> In global options:</font></tt>
<br><tt><font size=2>> <br>
> ddns-hostname = pick (option fqdn.hostname, option host-name, concat<br>
> ("ddns-", binary-to-ascii (10, 8, "-", leased-address)));</font></tt>
<br><tt><font size=2>> option host-name = config-option server.ddns-hostname;</font></tt>
<br><tt><font size=2>> <br>
> Resulting ddns hostname is ddns-xxx-xxx-xxx-xxx.domain_name</font></tt>
<br>
<br><tt><font size=2>I'm going to have to remember this method.</font></tt>
<br>
<br><tt><font size=2>After digging deeper into the logs, I found named
was complaining</font></tt>
<br><tt><font size=2>about the underscore in the name. The two lines
*do* work, if you</font></tt>
<br><tt><font size=2>remove the underscore in hostname.</font></tt>
<br>
<br><tt><font size=2>option host-name "e2rb_004"; <br>
ddns-hostname "e2rb_004"; <br>
</font></tt>
<br><tt><font size=2>Change to.</font></tt>
<br>
<br><tt><font size=2>option host-name "e2rb004"; <br>
ddns-hostname "e2rb004"; <br>
</font></tt>
<br>
<br><tt><font size=2>Thank you.</font></tt>
<br>
<br><tt><font size=2>> <br>
> Edit to suit.</font></tt>
<br><tt><font size=2>> <br>
> On Thu, Sep 22, 2016 at 1:48 PM, <durwin@mgtsciences.com> wrote:</font></tt>
<br><tt><font size=2>> I have some embedded devices with minimal OS.
I am not sure the <br>
> DHCP client has compiled ability to send hostname. I have seen
this<br>
> used while searching for help on this subject. <br>
> <br>
> host e2rb_004 { <br>
> option host-name "e2rb_004";
<br>
> ddns-hostname "e2rb_004"; <br>
> hardware ethernet 00:10:60:31:b2:a0; <br>
> fixed-address 172.23.93.38; <br>
> } <br>
> <br>
> <br>
> This does not add the hostname in DNS. My configuration does
work <br>
> as a normal DDNS. Any machine which sends it's hostname when
<br>
> requesting an IP *does* get added into DNS records. What I would
<br>
> like to do is to handle those embedded devices which do *not* send
hostname. <br>
> <br>
> Here is the DHCPD options. <br>
> <br>
> <br>
> === dhcpd.conf === <br>
> authoritative; <br>
> <br>
> ddns-update-style interim; <br>
> ddns-updates on; <br>
> ddns-domainname "mydomain.com"; <br>
> ddns-rev-domainname "in-addr.arpa."; <br>
> update-static-leases on; <br>
> ignore client-updates; <br>
> one-lease-per-client true; <br>
> <br>
> # WPAD definition <br>
> option wpad code 252 = text; <br>
> <br>
> key MSI_DHCPD_UPDATER { <br>
> algorithm hmac-md5; <br>
> secret "mysecret"; <br>
> }; <br>
> <br>
> zone mydomain.com. { <br>
> primary 127.0.0.1; <br>
> key MSI_DHCPD_UPDATER; <br>
> } <br>
> <br>
> zone 93.23.172.in-addr.arpa. { <br>
> primary 127.0.0.1; <br>
> key MSI_DHCPD_UPDATER; <br>
> } <br>
> <br>
> subnet 172.23.93.0 netmask 255.255.255.0 { <br>
> option routers 172.23.93.1;
<br>
> option wpad "\n\000"; <br>
> option subnet-mask 255.255.255.0;
<br>
> option domain-name "mydomain.com";
<br>
> option domain-name-servers 172.23.93.3,172.23.93.9,198.59.115.2;
<br>
> option time-offset -25200; # Mountain
Standard Time <br>
> range dynamic-bootp 172.23.93.95 172.23.93.249; <br>
> default-lease-time 57600; <br>
> max-lease-time 57600; <br>
> min-lease-time 57600; <br>
> ddns-domainname "mydomain.com"; <br>
> } <br>
> <br>
> <br>
> Any advice is appreciated. Thank you. <br>
> <br>
> <br>
> <br>
> Durwin F. De La Rue<br>
> Management Sciences, Inc.<br>
> 6022 Constitution Ave. NE<br>
> Albuquerque, NM 87110<br>
> Phone (505) 255-8611<br>
> <br>
> <br>
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<br><tt><font size=2>> <br>
</font></tt>
<br><tt><font size=2>> <br>
> -- </font></tt>
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